Spannungsfreie Befestigung und Schutz von flüssigkeitsgekühlten Festkörperlaser-Medien

Laser medium, laser medium unit, and laser beam amplification device

LASER OSCILLATOR AND LASER PROCESSING APPARATUS

A plurality of condensers 51-1 to 51-3 are arranged in a multistage manner to include a plurality of laser diodes 55-1 to 55-28 which generate excitation light and laser mediums56-1 to 56-3 which absorb the excitation light generated by the laser diodes to thereby emit laser beams. Cooling water that is cooled to a predetermined temperature by a cooler is circulated throughout the condensers through pipes. Valves 72-1 to 72-4 control the amount of cooling water supplied to each of the condensers based on the temperature of each of the condensers, the temperature being measured by an inlet temperature measuring unit 73 and outlet temperature measuring unit 74-1 to 74-3. The present invention can be applied to a laser processing apparatus.

LASER MEASURING APPARATUS

GAS LASER DEVICE AND PROCEDURE FOR THE ENTERPRISE.

Procédé et appareil de refroidissement d'un objet rayonnant de la chaleur

Temperature control multi-channel light emitting sub-module and optical transceiver module with same

Multifunctional laser device control box structure

HIGHPOWER LASERS

LASER HAVING A COOLING PART IN WHICH A CLOSED COOLING LOOP IS FORMED

도로 페인트 제거 장치 및 이를 이용한 도로 페인트 제거 방법

... 본 발명은 레이저 빔을 이용한 도로 페인트 제거 장치 및 이를 이용한 도로 페인트 제거 방법에 관한 것이다. 본 발명은 페인트가 도포된 영역의 페인트만 선택적으로 제거될 수 있도록 하여, 페인트 도포 영역 및 도포 영역 주변 아스팔트의 피해를 최소화해, 아스팔트가 파이는 것을 방지할 수 있으므로 도로를 재포장하는 데 발생하는 시간과 비용을 절감할 수 있는 도로 페인트 제거 장치 및 이를 이용한 도로 페인트 제거 방법의 제공을 목적으로 한다.

Laser unit

A laser unit using circulating cooling water, which may economically maintain the cleanliness of the cooling water and a channel for the cooling water. By a command of an operator, the activation of a water conveying device of the laser unit, the start of the laser oscillation, the stop of the laser oscillation and the stop of the conveying device are sequentially executed. When the laser unit is stopped for a relatively long period, an intermittent conveyance mode is automatically started in the laser unit. In this mode, the conveyance of the water starts after the passing of a first predetermined period of time and the conveyance stops after the passing of a second predetermined period of time. Similarly, the start and the stop of the conveyance of the water by the conveying device are alternately changed. When the laser oscillation should be started, the intermittent conveyance mode is terminated by the operator. The water conveyance device may be located within the laser unit or outside ...

LASER OSCILLATOR INCLUDING FANS WHICH COOL RESONATOR UNIT

A laser oscillator according to this invention includes a resonator unit, heat exchangers, fans, a resonator temperature measuring unit, and a fan control unit. The resonator unit resonates a laser beam to be output. The heat exchangers are arranged adjacent to the resonator unit and are to be supplied with a cooling liquid. The fans are arranged at least at one of two opposite positions across both the resonator unit and the heat exchangers and generate airflow in one direction, which passes through both the resonator unit and the heat exchangers. The resonator temperature measuring unit measures the temperature of the resonator unit. The fan control unit controls the fans. The fan control unit switches the direction in which air is blown by the fans, based on the temperature of the resonator unit.

Solid state laser cooling device

A solid state laser cooling device is disclosed. The device includes a pumping source generating light, a laser medium generating a resonant light from the pumped light, a heat exchanger treating heat generated from the laser medium, a metal mount supporting the heat exchanger and transferring heat to the heat exchanger, a heat transfer material transferring heat to the metal mount, and an interface material formed between the laser medium and the heat transfer material, so as to enhance a heat transfer efficiency. In another aspect of the present invention, the solid state laser cooling device includes a pumping source generating light, a laser medium including an added material for enhancing cooling efficiency and optical output, and a pair of metal mounts separated from each other and adhered to the laser medium.

Light-emitting device

A light-emitting device can have high heat dissipation performance from a light-transmitting member and be capable of easily making alignment of the light-transmitting member and an incidence hole for light into the light-transmitting member. The light-emitting device can include: a base; a light-emitting element held by the base; a lens held by the base and disposed above the light-emitting element, configured to condense light emitted from the light-emitting element; a first tubular member disposed on the base; a second tubular member fitted into the first tubular member; a holder allowed to be inserted into the second tubular member and thereby fitted into the second tubular member and having a through hole through which light condensed by the lens passes; and a light-transmitting member formed on the holder so as to block the through hole.

TEMPERATURE CONTROLLED MULTI-CHANNEL TRANSMITTER OPTICAL SUBASSEMBLY AND OPTICAL TRANSCEIVER MODULE INCLUDING SAME

A temperature controlled multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The temperature controlled multi-channel TOSA generally includes an array of lasers optically coupled to an optical multiplexer, such as an arrayed waveguide grating (AWG), to combine multiple optical signals at different channel wavelengths. The lasers may be thermally tuned to the channel wavelengths by establishing a global temperature for the array of lasers and separately raising local temperatures of individual lasers in response to monitored wavelengths associated with the lasers. A temperature control device, such as a TEC cooler coupled to the laser array, may provide the global temperature and individual heaters, such as resistors adjacent respective lasers, may provide the local temperatures. The optical transceiver may be used in a wavelength division multiplexed (WDM) optical system, for example, in an optical line terminal (OLT) in a WDM passive ...

Laser oscillator

A laser oscillator (10) capable of executing a high-speed feedback control by reducing the control load of a main processor (26) in the feedback control of the laser output. The laser is excited by an excitation source (14) activated by one or more power supplies (12). The laser radiation is detected by a power sensor (18) or a photodiode. A detected signal is A/D converted and fed to a sub processor (22) or a high-speed DSP. The sub processor compares the current laser output value to a desired control value and calculates a deviation value in a predetermined period. The sub processor outputs a feedback signal to each of the power supplies according to a command from the main processor. Each power supply adjusts the supplied current to control the laser output. The main processor monitors conditions of the power supplies and controls a coolant circulation device. A factor regarding a load on a sequential control process, which may delay the feedback control, is eliminated and an analog ...

ТЕПЛОНОСИТЕЛЬ ДЛЯ ЛАЗЕРОВ

Использовние: в лазерной технике. Сущность: применение диметил-ди-(изо-амилокси)силана структурной формулы в качестве теплоносителя с низкой токсичностью и малой коррозионной активностью для лазеров. 2 табл.

Спектрально-селективное устройство для систем стабилизации частоты лазерного излучения

Полезная модель относится оптико-электронной технике и может быть использована в качестве спектрально-селективных устройств, используемых для стабилизации частот излучения независимых лазерных источников к частотам собственных резонансов эталонных интерферометров Фабри-Перо, а также в оптических стандартах частоты или квантовых вычислителях на нейтральных атомах или ионах для последовательного возбуждения переходов между их электронными состояниями. Требуемый технический результат, заключающийся в повышении точности и стабильности работы, достигается в устройстве, содержащем размещенный в корпусе оптический резонатор с оптическим доступом резонатора вдоль оптической оси, совпадающей с его осью симметрии, причем корпус, выполненный с возможностью размещения в вакуумной камере, состоит из внутреннего пассивного теплового экрана, в котором осесимметрично на подвесе закрепляется оптический резонатор, и из активного теплового экрана, закрепленного поверх внутреннего пассивного теплового экрана ...

Measuring device e.g. laser measuring device, retaining device for e.g. camp vehicle, has Peltier unit provided by cooling body with cooling fins, where fins are circulated with suction hole and blow hole from air flow by blowers

The device has a housing (3) that is formed from an upper part (3a) and a lower part. The upper part of the housing has a temperature-isolated multilayered wall (4) with a measuring window (17). A measuring device overlies in the housing with its lower side on a plate-like Peltier unit that is bounded by metallic lower and upper cover plates (14, 15) that conduct good temperature. The Peltier unit is provided by a cooling body with cooling fins (13a). The fins are circulated with a suction hole (6) and a blow hole (7) from an air flow by blowers (8, 9).

Laser medium, laser medium unit, and laser beam amplification device

GAS LASER APPARATUS, METHOD AND TURBINE COMPRESSOR THEREFOR

SYSTEMS AND CONVEYANCE STRUCTURES FOR HIGH POWER LONG DISTANCE LASER TRANSMISSION

There is provided a mobile high power laser system and conveyance structure for delivering high power laser energy to and for performing high power laser operations in remote and difficult to access locations. There is further provide such systems with high power laser, handling equipment and conveyance equipment that are configured to avoid exceeding the maximum bending radius of high power optical fibers used with the conveyance structures. There are also provided embodiments of the conveyance structures having channels, lines and passages for delivering materials such as fluids.

LASER COMPRISING AT LEAST ONE SEAL

LASER GENERATOR HAVING A REPLACEABLE OPTICAL PUMPING TUBE

Dispositif de régulation et de lissage de température pour un fluide caloporteur.

Le dispositif de régulation et de lissage de température est composé d'un échangeur (3) raccordé sur un circuit primaire régulé en "tout ou rien" par une électrovanne (4), pilotée par un sonde (6) située à la sortie de l'échangeur, sur le circuit secondaire. Un ou plusieurs bacs de lissage de température (8) en série situés en aval de l'échangeur (3) stabilisent la température du liquide caloporteur du circuit secondaire, avant de l'envoyer dans l'appareil (5) à refroidir, de manière à ce que les oscillations de température résiduelles ne soient plus décelables par les moyens de mesure disponibles dans l'installation et ne créent pas de conséquences sur le fonctionnement de l'installation à refroidir. Ce dispositif sert notamment à réguler la température des circuits électroniques de puissance dans lesquels la température doit être stabilisée dans une fourchette étroite, pendant chaque phase de travail. La température moyenne pouvant varier d'une séquence de travail à l'autre.

PROCESS AND DEVICE Of EMISSION Of a LASER BEAM IN a CASE

Le dispositif d'émission d'un faisceau laser comporte, dans un boîtier (320) : - un composant (345) émetteur d'un faisceau laser monté sur une embase (305), - un composant (330) de diffusion de la chaleur produite par le laser du composant émetteur de laser auquel est solidarisée l'embase du composant émetteur, le composant de diffusion de chaleur portant une marque de positionnement (310) et au moins trois trous pour pions de centrage usinés conjointement avec la marque de positionnement, - au moins une lentille de collimation (365) et - un support de lentille (335) adapté à tenir chaque dite lentille en regard du composant émetteur du faisceau laser, ledit support de lentille étant positionné par rapport au composant de diffusion de chaleur, par l'intermédiaire d'au moins trois pions de centrage (315) positionnés dans les trous du composant de diffusion de chaleur.

Methods, systems, and apparatus for high energy optical-pulse amplification at high average power

An inventive composite optical gain medium capable includes a thin-disk gain layer bonded to an index-matched cap. The gain medium's surface is shaped like a paraboloid frustum or other truncated surface of revolution. The gain medium may be cryogenically cooled and optically pumped to provide optical gain for a pulsed laser beam. Photons emitted spontaneously in the gain layer reflect off or refract through the curved surface and out of the gain medium, reducing amplified spontaneous emission (ASE). This reduces limits on stored energy and gain imposed by ASE, enabling higher average powers (e.g., 100-10,000 Watts). Operating at cryogenic temperatures reduces thermal distortion caused by thermo-mechanical surface deformations and thermo-optic index variations in the gain medium. This facilitates the use of the gain medium in an image-relayed, multi-pass architecture for smoothed extraction and further increases in peak pulse energy (e.g., to 1-100 Joules).

Anordnung zum Kühlen von Entladungslampen und ihre Verwendung

Lasergerät

Thermo-electric cooler

Thermo-electric cooler

A thermo-electric cooler comprises a pair of parallel electrically insulating and thermally conducting plates 4, 17, 21 and an array of thermo-electric elements 6 arranged between the plates. A pair of contact pads are provided on an upper surface of the lower plate 4. The upper plate 17, 21 is suitable for optical and/or electro-optical components to be mounted thereon. The upper plate 17,21 has a structure 20, 22 providing rigidity to the upper plate 17, 21. The structure may be a flange 20 projecting in a direction perpendicular to the plane of the upper plate 17. Alternatively, the structure may be one or more rods embedded in the upper plate 21. The alignment of optical and/or electro-optical devices mounted on the upper plate is thus maintained by the rigid upper plate 17, 21.

Thermo-electric cooler

Pumping light source for laser-active media

A method for compensating for wavelength drift

A method of calibrating a multichannel optoelectronic assembly comprises selecting first and second target wavelengths separated from each other by a predefined channel separation amount. The temperature of third optoelectronic assembly is set to a first value, which operates the optoelectronic assembly to emit light. The temperature is adjusted until the difference between an output wavelength of the optoelectronic assembly and the first target wavelength is less than a predefined value. A second value which corresponds to the adjusted temperature is stored as a second control value associated with the second target wavelength. An optoelectronic device comprising at least one temperature sensor for detecting a temperature associated with a laser diode is also disclosed.

Side-pumped laser or amplifier device

Device for optically scanning and measuring an environment

With a device for optically scanning and measuring an environment, which is designed as a laser scanner (10), with a light emitter (17), which emits an emission light beam (18), with a light receiver (21) which receives a reception light beam (20) which is reflected from an object (O) in the environment of the laser scanner (10) or scattered otherwise, and with a control and evaluation unit (22) which, for a multitude of measuring points (X), determines at least the distance to the object (O), the laser scanner (10) has a cooling device (70) with a space (Z) between a carrying structure (30) and a shell (32) which serves as a housing, said space (Z) opening to the outside by means of an air inlet (80) and otherwise being sealed with respect to the interior of the carrying structure (30) and to the shell (32) ...

Laser oscillator and laser processing apparatus

EINSTUCKIGER LASER HEAD WITH EXCHANGEABLE DISCHARGER EARS FOR OPTICAL PUMPING

GAS LASER APPARATUS, METHOD AND TURBINE COMPRESSOR THEREFOR

A fast axial flow gas laser apparatus comprising an at least essentially closed loop defining a flow path for a laser gas, an arrangement for exciting gas flowing in the loop of the apparatus to cause the gas to lase, and a regenerative compressor for flowing gas through the closed loop along the flow path. The compressor is capable of operating with a pressure ratio sufficient to flow the gas along at least a portion of the loop at a speed at least half the speed of sound in the gas with inlet pressures of only a small fraction of an atmosphere. The uniform discharge pressure of the compressor results in a uniform laser discharge or output. A positive pressure fluid pressure seal prevents lubricant at a bearing support for the impeller shaft of the compressor from moving to the impeller and possibly contaminating the laser gas being compressed thereby and also prevents surrounding air from contaminating the laser gas. The pressurized fluid of the seal is permitted to migrate into the laser ...

ANTI-TRANSVERSE LASING DEVICE WITH LONGITUDINAL COOLING FOR EMITTING A LASER BEAM

The invention relates to a device for emitting a laser beam, which comprises a cylindrical solid amplifier medium (1), having a fluorescence wavelength .lambda., delimited by a surface .SIGMA. connecting two faces S1 and S2 and intended to be pumped through both the faces, or one of them, in order to become a gain medium. It comprises a cooling fluid (31) of thermal conductivity Cr in contact with the amplifier medium (1) over one of the faces, and an index matching liquid (21) that absorbs or scatters the fluorescence wavelength, of thermal conductivity Ci < 0.3 Cr, in contact with the amplifier medium (1) over its surface .SIGMA..

PROCESS AND DEVICE Of EMISSION Of a LASER BEAM IN a CASE

CONNECTION SYSTEM FOR SMOOTHING TEMPERATURE TO A HEAT TRANSFER FLUID.

MULTI KW CLASS BLUE LASER SYSTEM

Optical Fiber Laser Device

전방향 감지가 용이한 적외선 카메라 장치

... 본 발명은 적외선 카메라 장치에 관한 것으로서, 더욱 상세하게는 복수개의 적외선 LED 모듈이 구비되어 전방향 감지가 용이한 적외선 카메라 장치에 관한 것이다.본 발명의 전방향 감지가 용이한 적외선 카메라 장치는, 내부에 공간부를 형성하고 측벽 둘레가 적어도 육각으로 형성되는 본체와, 상기 본체의 측벽을 이루는 각 면에 개별적으로 장착되어 전방향의 피사체를 감지하는 적외선 엘이디 모듈과, 상기 본체의 하부에 형성되어 전방향을 촬영하는 카메라와, 상기 본체의 내부 공간부에 마련되어 상기 적외선 엘이디 모듈과 상기 카메라의 작동을 제어하는 컨트롤러 및 상기 본체의 내부 공간부에 마련되어 상기 적외선 엘이디 모듈을 순환식 수랭방식으로 냉각시키는 냉각수단을 포함하며, 상기 냉각수단은, 상기 적외선 엘이디 모듈의 기판 후면에 마련되며, 일측에는 냉각된 액체가 유입되는 유입구가 형성되고, 타측에는 열교환된 액체가 배출되는 배출구가 형성된 열교환부와, 상기 열교환부의 배출구와 연결되어 상기 열교환된 액체가 일정 방향으로 순환하도록 흡입 및 흡출시키는 펌핑부와, 일단부는 상기 열교환부와 연결되고 타단부는 상기 펌핑부와 연결되어 상기 펌핑부에서 흡출된 액체가 상기 열교환부 방향으로 흐르는 동안 냉각시키는 냉각처리부와, 상기 열교환부 내부에 마련되며, 상기 유입구로 유입되는 액체가 배출구로 원활하게 흐를 수 있도록 나선형으로 배치되는 가이드격벽을 포함하고, 상기 냉각처리부는 상기 열교환부와 밀착 배치되며, 일정 간격으로 굴곡진 형태로 이루어져 일단부는 상기 열교환부와 연결되고 타단부는 상기 펌핑부와 연결되는 냉각관과, 회전날개가 회전하며 송풍을 발생시켜 상기 냉각관을 흐르는 액체를 냉각시키는 냉각팬을 포함하되, 상기 냉각처리부는 본체의 공간부 중심에 마련되며, 상기 냉각관은 본체의 정중앙에 마련되는 컨트롤러를 애워싸는 형태로 배치되며, 냉각팬은 냉각관과 컨트롤러의 하부에 배치되어 상방으로 송풍을 발생시키는 것을 특징으로한다.

Thin film excitation

A device to produce and test a thin film of excited gas or liquid comprising a helium resonance lamp having an emission at 584A and including a window in said lamp partially transparent to radiation at 584A. A chamber containing a gas mixture including helium surrounds the window. Windows are provided in the chamber adjacent the lamp window, said windows being transparent to emission emanating from the gas adjacent the lamp window when the lamp is excited by an RF source.

SYSTEM, APPARATUS AND METHOD EMPLOYING A DUAL HEAD LASER

A system, apparatus and method employing a laser with a split-head, V-assembly gain material configuration. Additionally, the present invention is directed to techniques to better dissipate or remove unwanted energies in laser operations. The present invention is also directed to techniques for better collimated laser beams, with single spatial mode quality (TEM00), with improved efficiency, in extreme environments, such as in outer space. 1. A laser device comprising:a first gain material, said first gain material having an orientation along an axis for the resultant laser beam;a second gain material, said second gain material having an orientation orthogonal to that of the first gain material and along said axis;a waveplate disposed between said first and second gain materials along said axis; andenergy means to pump energy into said first and second gain materials.2. The laser device according to claim 1 , wherein said energy means comprises a plurality of diodes disposed adjacent said first and second gain materials.3. The laser device according to claim 1 , further comprising:at least one diode array.4. The laser device according to claim 3 , wherein said at least one diode array comprises a first diode array adjacent said first gain material and a second diode array adjacent said second gain material.5. The laser device according to claim 1 , wherein said first and second gain materials are made of a crystal or ceramic material.6. The laser device according to claim 5 , wherein said first and second gain materials are made of neodymium-doped ytterbium aluminum garnet.7. The laser device according to claim 1 , wherein said waveplate is a one half waveplate.8. The laser device according to claim 1 , further comprising a component selected from the group consisting of mirrors claim 1 , high reflective mirrors claim 1 , Risley prisms claim 1 , pairs of Risley prisms claim 1 , thin film polarizers claim 1 , one quarter waveplates claim 1 , electro-optic switches ...

Transition-metal-doped thin-disk laser

A laser includes a Ti:sapphire gain-medium in the form of a thin-disk. The thin-disk gain-medium is optically pumped by pump-radiation pulses having a wavelength in the green region of the electromagnetic spectrum. The pump-radiation pulses have a duration less than twice the excited-state lifetime of the gain-medium.

LASERBEARBEITUNGSKOPF MIT ZIRKULATIONSWEG ZUM UMWÄLZEN VON KÜHLMITTEL

Laserbearbeitungskopf (10), der dafür eingerichtet ist, einen Laserstahl zu konzentrieren und ihn auf ein Werkstück (W) zu strahlen, wobei der Laserbearbeitungskopf (10) Folgendes umfasst:einen Kopfkörper (12, 14, 18), der Folgendes aufweist:ein einen Strahl empfangendes Teil (12), das dafür eingerichtet ist, einen Laserstrahl zu empfangen,ein einen Strahl abgebendes Teil (18), der dafür eingerichtet ist, den von dem einen Strahl empfangenden Teil (12) empfangenen Laserstrahl nach außen abzugeben,ein optisches Element (16), das in dem Körper gehalten wird und dafür eingerichtet ist,den von dem einen Strahl empfangenden Teil (12) empfangenen Laserstrahl zu konzentrieren und zu dem einen Strahl abgebenden Teil (18) zu führen,einen geschlossenen Zirkulationsweg mit einer Schleife (20), der bei dem Kopfkörper (12, 14, 18) so vorgesehen ist, dass er sich in Form einer Schleife an einer von dem optischen Weg getrennten Position erstreckt, wobei der Zirkulationsweg (20) dafür eingerichtet ist, ...

Vorrichtung zur kapazitiven Einkopplung von Hochfrequenzleistung in ein Lasergas

Slab- oder Bandleiterlaser

Thermo-electric cooler

Pumping light source for laser-active media

In order to improve the service life of a pumping light source for laser-active media comprising a gas discharge unit 18 having an outer member 36 enclosing a gas discharge medium, a first electrode 44 acting as a cathode and having a first electrode end 54 located within the outer member, a second electrode 64 acting as an anode and having a second electrode end 74 located within the outer member and a gas discharge space located within the outer member between the electrode ends facing one another, the first electrode end 54 is cooled essentially only by radiation and a predominantly diffuse gas discharge is formed proceeding from an areally extended surface area located at the first electrode end. The gas discharge unit 18 may be enclosed in a cooling unit through which a cooling medium flows. The gas discharge may be started as an essentially punctiform gas discharge by the provision of a surface discontinuity outside the areally extended surface area.

Controlling overspray coating in semiconductor devices

ATTACHMENT ARRANGEMENT FOR A PUMPING MODULE

EINSTUCKIGER LASERKOPF MIT AUSTAUSCHBARER ENTLADEROHRE ZUM OPTISCHEN PUMPEN

Temperature regulation and smoothing device for a heat-exchange (coolant) fluid

Laser treatment apparatus

A laser treatment apparatus for performing treatments on an affected part by irradiating the affected part with a laser beam for treatment is disclosed. This apparatus includes a laser oscillator, a cooling unit including a fan which cools the laser oscillator, a temperature sensor which directly or indirectly detects a temperature of the laser oscillator, and a control unit which drives the fan at roughly constant low speed when a detected temperature by the temperature sensor is below a predetermined reference value and at roughly constant high speed when the detected temperature is the predetermined reference value or more.

Gasdynamic solar powered laser

A stabilized-satellite power system located outside of the earth's atmosphere collects solar energy, converting it by dynamic gas laser interaction into a beam of infrared energy directed toward a power utilization station, such as at the earth's surface, the wave length of the infrared energy lying within a non-attenuating pass-band in the earth's atmosphere. A section of the laser is cooled by a directive radiator system aligned toward outer space.

OILFIELD LASER OPERATIONS USING HIGH POWER LONG DISTANCE LASER TRANSMISSION SYSTEMS

There is provided a mobile high power laser system and conveyance structure for delivering high power laser energy to and for performing high power laser operations in remote and difficult to access locations. There is further provide such systems with high power laser, handling equipment and conveyance equipment that are configured to avoid exceeding the maximum bending radius of high power optical fibers used with the conveyance structures. There are also provided embodiments of the conveyance structures having channels, lines and passages for delivering materials such as fluids.

Wavelength-variable laser

A distributed feedback (DFB) laser outputting a predetermined wavelength of laser light includes a quantum well active layer positioned between a p-type cladding layer and an n-type cladding layer in thickness direction. The DFB laser includes a separate confinement heterostructure layer positioned between the quantum well active layer and then-type cladding layer. The DFB laser includes an electric-field-distribution-control layer positioned between the separate confinement heterostructure layer and then-type cladding layer and configured by at least two semiconductor layers having band gap energy greater than band gap energy of a barrier layer constituting the quantum well active layer. The DFB laser has a function to select a specific wavelength by returning a specific wavelength in the wavelength-variable laser.

TRANSMITTING UNIT AND LIDAR DEVICE FOR SCANNING A SCANNING RANGE

A transmitting unit of a LIDAR device includes at least two radiation sources for generating and emitting punctiform or linear electromagnetic beams into a scanning range, at least one of the radiation sources including an operating temperature settable as a function of an emission angle of the electromagnetic beams generated by the at least one radiation source. The different operating temperatures can generate beams having angle-dependent emission wavelengths, which can result in an improvement of the signal-to-noise ratio of a LIDAR device.

ЛАЗЕРНАЯ СИСТЕМА МНОГОКИЛОВАТТНОГО КЛАССА С ИЗЛУЧЕНИЕМ В ГОЛУБОЙ ОБЛАСТИ СПЕКТРА

Использование: для генерирования мощного лазерного излучения с короткой длиной волны в области спектра 400-495 нм. Сущность изобретения заключается в том, что лазерная система является объединением соединенных с волокном модулей, которые, в свою очередь, образованы из подмодулей. Один вариант осуществления имеет подмодули, имеющие множество линзовых полупроводниковых усиливающих в голубой области спектра кристаллов с передними гранями с низким коэффициентом отражения. Они синхронизируются по длине волны с разбросом по длинам волн, составляющим <1 нм, с использованием объемных брэгговских решеток в конфигурации с внешним резонатором. Один вариант осуществления имеет модули, имеющие множество подмодулей, которые объединены посредством мультиплексирования по длинам волн с шириной полосы <10 нм, после чего следует поляризационное объединение пучков. Выходное излучение каждого модуля вводится в волокно с малой NA. В одном варианте осуществления лазерная система киловаттного уровня с излучением ...

Laseroszillator

Laser mit verbesserter Strahlqualität und verringerten Betriebskosten

Pumping light source for laser-active media

LASER GENERATOR HAVING A REPLACEABLE OPTICAL PUMPING TUBE

... 1383139 Lasers COMPAGNIE GENERALE D'ELECTRICITE 15 March 1973 [17 March 1972] 12643/73 Heading H1C A laser of the type having a solid active rod and an optical pumping tube disposed parallel within a housing is designed such that by removing a power supply connector the pumping tube can be withdrawn for replacement without altering the alignment of the optical resonator. The two ends of the housing 1 are shown in Figs. 1a and 1b; the pumping tube 7 is withdrawn at the end shown in Fig. 1b by unscrewing cap 54, removing connector 49, 53, and passing the tube through the aperture thus exposed. The housing 1 has a magnesia pumping light reflector 8 within its bore. The active medium 6 and pumping tube 7 are supported in the bore by flanges 13 and 33 which fit inside the end rims of the housing. The flanges are held to the housing by screws 14, 43 and correct location is provided by studs 22 and 44. Cooling water is passed through the bore by pipes 11, 12, and fluid tightness is ensured by ...

LASER HAVING IMPROVED BEAM QUALITY AND REDUCED OPERATING COST

Disclosed is a laser useful in, e.g., photolithography or medical surgery. I n one embodiment, the laser comprises a discharge chamber and heat-generating electronics that are enclosed in a baffled enclosure that requires less cooling air to reliably cool the components in the enclosure than previous unbaffled enclosures. A method of reducing the amount of conditioned air is also provided. In a further embodiment, the laser has a heat-exchange system that acts quickly in response to changes in laser gas temperature by adjusting a flow-proportioning valve regulating water flow through a heat exchanger, thereby providing a continuously variable rate of heat exchange through the heat exchanger to maintain the lasing gas temperature constant. Methods of providing a laser beam and of improving the uniformity of a laser beam ar e disclosed, as are photolithography methods utilizing a laser and method of this invention.

LASER DEVICE

It is an object of the present invention to provide a laser device of long life. In the laser device, light source is housed in transparent cooling vessel, and the vessel is filled with a cooling liquid which is circulated. The electrodes of the light source project out of the cooling vessel Reflectors are provided outside the cooling vessel. The electrodes and the reflectors are out of contact with the cooling liquid. It is another object of the present invention to stabilize laser oscillation. A light source is housed in a first transparent cooling vessel. The first cooling vessel is filled with a first cooling liquid. A laser medium is housed in a second transparent cooling vessel. The second cooling vessel is filled with a second cooling liquid. A heat insulation layer is provided between the first and the second cooling vessels 90 that the first and the second cooling liquids are thermally insulated from each other.

Optical element having cooling function

Laser Light Source Module

Laser oscillator comprising heat exchanger having function of collecting foreign matters

A laser oscillator comprises a heat exchanger which cools a gas medium. The heat exchanger includes a cooling part which performs heat exchange between the gas medium and a cooling medium, a tubular member fixed to a frame body, and a foreign matter collection container. The tubular member is disposed so that the gas medium which flows out of the cooling part moves along an outer surface of the tubular member and then changes a proceeding direction to flow into an inlet portion. The foreign matter collection container collects foreign matters which are separated from a flow of the gas medium.

Optical semiconductor device, semiconductor laser module, and optical fiber amplifier

An optical semiconductor device outputting a predetermined wavelength of laser light includes: a quantum well active layer positioned between a p-type cladding layer and an n-type cladding layer in thickness direction; a separate confinement heterostructure layer positioned between the quantum well active layer and the n-type cladding layer; and an electric-field-distribution-control layer positioned between the separate confinement heterostructure layer and the n-type cladding layer and configured by at least two semiconductor layers having band gap energy greater than band gap energy of a barrier layer constituting the quantum well active layer.

Nuclear-pumped uranyl salt laser

A direct nuclear radiation pumped laser consisting essentially of a uranyl salt with a UO2++ uranyl ion enriched in the U235 isotope sufficient to sustain a fission chain reaction, the uranyl ion being directly nuclear radiation pumped by a fission power transient of the core to produce laser action between a low-lying vibrational level of the first triplet electronic state and an upper vibrational level of the singlet ground state.

Активный элемент дискового лазера с системой охлаждения

Изобретение относится к лазерной технике. Сущность заключается в раздельном охлаждении внутренней и внешней части дискового активного элемента либо путем торцевого присоединения внутренней и внешней его части к охлаждающим радиаторам с различной температурой, либо прикреплением внутренней части к элементу Пельтье, который, как и внешняя часть, присоединен к общему охлаждающему радиатору. Технический результат - значительное уменьшение перепада температур в дисковом активном оптическом элементе и, как следствие, уменьшение температурного шока и термонаведенных искажений излучения, возникающих в дисковом лазере, улучшение качества излучения и повышение эффективности дискового лазера. 2 з.п. ф-лы, 3 ил.

Kühlvorrichtung für einen Laser

LASERMESSEINRICHTUNG

Laser medium, laser medium unit, and laser beam amplification device

This plate-like laser medium has a through-hole for circulating a cooling medium. This laser medium unit is provided with a plurality of laser mediums. This laser beam amplification device is provided with: a laser medium unit 10; an excitation light source 21 that emits an excitation light into the laser medium unit 10; a through-hole 16a that is made of a window material and acts as a means for supplying the cooling medium into a through-hole 14a in a laser medium 14; and a cooling medium passage F1 arranged around the laser medium unit 10.

Device for optically scanning and measuring an enviroment

WEAPONS SYSTEM HAVING AT LEAST TWO HEL EFFECTORS

In the case of a weapons system (100) with at least two HEL effectors (5.1, 5.2, 5.3), which have at least one beam guidance system (2.1, 2.2, 2.3), the present invention proposes the use of only one laser source (1) or one pump source (10) for the at least two HEL effectors (5.1, 5.2, 5.3). The beam guidance systems (2.1, 2.2, 2.3) of the HEL effectors (5.1, 5.2, 5.3) resort to the common laser source (1) or common pump source (10). An optical link of the common laser source (1) or of the common pump source (10) with the beam guidance system (2.1, 2.2, 2.3), be it direct or indirect, is implemented by means of at least one optical switching unit (4, 14), and so at least one functional, complete HEL effector (5.1, 5.2, 5.3) of the weapons system (100) is provided to defend against threats.

LASER HAVING IMPROVED BEAM QUALITY AND REDUCED OPERATING COST

Disclosed is a laser useful in, e.g., photolithography or medical surgery. In one embodiment, the laser comprises a discharge chamber and heat-generating electronics that are enclosed in a baffled enclosure that requires less cooling air to reliably cool the components in the enclosure than previous unbaffled enclosures. A method of reducing the amount of conditioned air is also provided. In a further embodiment, the laser has a heat-exchange system that acts quickly in response to changes in laser gas temperature by adjusting a flow-proportioning valve regulating water flow through a heat exchanger, thereby providing a continuously variable rate of heat exchange through the heat exchanger to maintain the lasing gas temperature constant. Methods of providing a laser beam and of improving the uniformity of a laser beam are disclosed, as are photolithography methods utilizing a laser and method of this invention.

Quantum interference device, atomic oscillator, electronic equipment, and moving body

Integrated active heat radiating structure of the laser beam of the multi-dimensional precision adjusting device

Pressurised gas cooking device for heat - radiating object

LASER ENCLOSURE

In a laser enclosure of the present invention, a laser experiment apparatus including an optical module and a power supply module can be installed. The laser enclosure comprises: a table in which the optical module is installed; a frame installed around the table; and a sealing unit including a body member formed to cover the laser experiment apparatus, and opening and closing a part of the body member so as to seal the optical module installed on the table from the outside. COPYRIGHT KIPO 2018 ...

PATTERNED LASER BEAM OUTPUT APPARATUS

The present invention relates to a laser apparatus outputting a patterned laser beam. The patterned laser beam output apparatus selectively controls a pattern of a mirror and determines a pattern of a laser beam to control the quality of a laser beam and energy distribution, thereby maximizing treatment effects by a laser beam. The laser apparatus comprises a laser generation part, a laser output part, a laser transmission part, and a control part. COPYRIGHT KIPO 2018 ...

RF SHIELDED, SERIES INDUCTOR, HIGH RF POWER IMPEDANCE MATCHING INTERCONNECTOR FOR CO2 SLAB LASER

A RF shielded, series inductor, high power impedance matching network interconnector is provided for connecting an RF power supply (102) to electrodes contained in the shielded, hermetically sealed laser tube housing (106) of a slab laser system. The impedance matching interconhector comprises a short length of co-axial conductor (122) and an impedance matching network (118) that includes two L shaped networks The inner conductor of the co-axial conductor (122) is connected between the power supply output (102) and the impedance matching network (118). The-outer conductor of the co-axial conductor (122) is grounded. The co-axial conductor (122) has an impedance characteristic to match the power supply output impedance (Zp). The first L-shaped network includes a first inductor (L1) having a first end connected to the inner conductor of the co-axial conductor (122) and a first capacitor (C1) connected to the second end of the first inductor (L1) and a second plate connected to ground. The ...

METHODS, SYSTEMS, AND APPARATUS FOR HIGH ENERGY OPTICAL-PULSE AMPLIFICATION AT HIGH AVERAGE POWER

An inventive composite optical gain medium capable includes a thin-disk gain layer bonded to an index-matched cap. The gain medium's surface is shaped like a paraboloid frustum or other truncated surface of revolution. The gain medium may be cryogenically cooled and optically pumped to provide optical gain for a pulsed laser beam. Photons emitted spontaneously in the gain layer reflect off or refract through the curved surface and out of the gain medium, reducing amplified spontaneous emission (ASE). This reduces limits on stored energy and gain imposed by ASE, enabling higher average powers (e.g., 100-10,000 Watts). Operating at cryogenic temperatures reduces thermal distortion caused by thermo-mechanical surface deformations and thermo-optic index variations in the gain medium. This facilitates the use of the gain medium in an image-relayed, multi-pass architecture for smoothed extraction and further increases in peak pulse energy (e.g., to 1-100 Joules).

SOLID BODY, LASER AMPLIFICATION SYSTEM, AND SOLID-STATE LASER

The invention relates to a discoidal or cuboidal solid body for a laser amplification system of a solid-state laser, which solid body contains at least one laser-active material, has an upper side defining an upper side plane and a lower side defining a lower side plane, wherein the upper side plane and the lower side plane are inclined in relation to each other and enclose an angle of inclination, wherein the lower side is provided with a first reflective coating, wherein the upper side is provided with a second reflective coating, and wherein at least one of the upper side and the lower side has at least one optical input coupling opening for input coupling at least one of a seed laser radiation field and a pump laser radiation field into the solid body between the first and the second reflective coating.

Thermal storage for high load short duration cooling

A thermal management system for a directed energy weapon includes a first heat exchanger thermally coupled to the directed energy weapon and a second heat exchanger arranged in fluid communication with the first heat exchanger to form a closed loop. The second heat exchanger is thermally coupled to a secondary system and a thermal management fluid circulates within the closed loop. A thermal storage device is arranged in fluid communication with the first heat exchanger and the second heat exchanger. The thermal storage device contains a material and a mode of operation of the directed energy weapon is dependent on a condition of the material in the thermal storage device.

Laser having improved beam quality and reduced operating cost

Lasergerät

Laser mit Kühlwassereinheit

LASERKÜHLUNGSVORRICHTUNG UND VERFAHREN

Enclosure for controlling the environment of optical crystals

An enclosure that maintains the environment of one or more optical crystals and allows efficient frequency conversion for light at wavelengths at or below 400 nm with minimal stress being placed on the crystals in the presence of varying temperatures. Efficient conversion may include multiple crystals of the same or different materials. Multiple frequency conversion steps may also be employed within a single enclosure. Materials that have been processed specifically to provide increased lifetimes, stability, and damage thresholds over designs previously available are employed. The enclosure allows pre-exposure processing of the crystal(s) such as baking at high temperatures and allowing real time measurement of crystal properties.

Diamond heat sink in a laser

A laser has a laser material in thermal contact with a diamond, such that the diamond is operable to carry heat away from the laser material. In further embodiments, the diamond has a reduced nitrogen content, is a reduced carbon-13 content, is a monocrystalline or multilayer low-strain diamond, or has a thermal conductivity of greater than 2200 W/mK.

Gas laser apparatus equipped with power calculation unit

Disclosed is a gas laser apparatus having: a first estimation unit which calculates an estimate of input power to the laser power supply device by using the output current value and output voltage value of the DC power supply unit and also using the efficiency of conversion from input power to output power by the DC power supply unit; a second estimation unit which calculates an estimate of input power to the driving device by using the output current value of the driving device; and a power calculation unit which calculates the power consumption value of the gas laser apparatus, based on the estimate of the input power to the laser power supply device and the estimate of the input power to the driving device.

Compression Mount for Semiconductor Devices, and Method

A mount for semiconductor laser devices comprises thermally conductive anode and cathode blocks on either side of a semiconductor laser device such as a laser diode. Interposed between at least the anode block and the anode of the semiconductor laser device is a sheet of conformable material with high thermal conductivity such as pyrolytic highly-oriented graphite. In some embodiments, a second sheet of such thermally conductive conformable material is interposed between the cathode of the semiconductor laser device and the cathode block. The semiconductor laser device can be either a single laser diode or a diode bar having a plurality of emitters. A thermally conductive, but electrically insulating, spacer of essentially the same thickness as the laser diode or bar surrounds the diode or bar to prevent mechanical damage while still permitting the conformable material to be maintained in a compressed state.

Controlling Temperature Differences in a Gas Laser

A gas laser includes discharge tubes connected to together by corner housings, each corner housing including a first cooling channel configured to allow flow of a first coolant. A heat exchanger circuit includes a plurality of second cooling channels configured to allow flow of a second coolant. Each second cooling channel is operable to cool laser gas prior to the laser gas entering into one of the corner housings. The gas laser further includes a temperature control device, in which the temperature control device is selected from the group consisting of a laser gas cooling device, a coolant temperature control assembly, and combinations thereof. The temperature control device is operable to maintain a temperature difference of less than approximately 5 K between the first coolant flowing through the first cooling channel of the corner housing and the laser gas entering into the corner housing. 1. A gas laser comprising:a plurality of discharge tubes, the discharge tubes being connected to together by corner housings, each corner housing comprising a mirror element for guiding a laser beam and a first cooling channel configured to allow flow of a first coolant;a primary heat exchanger circuit comprising a plurality of second cooling channels configured to allow flow of a second coolant, wherein each second cooling channel is operable to cool laser gas prior to the laser gas entering into one of the corner housings; andat least one temperature control device being selected from the group consisting of a laser gas cooling device, a coolant temperature control assembly operable to generate a temperature difference between the first coolant flowing in the first cooling channel of the corner housing and the second coolant flowing in the second cooling channel of the primary heat exchanger circuit, and combinations thereof, wherein the at least one temperature control device is operable to maintain a temperature difference of less than approximately 5 K between the first ...

Mode control waveguide-type laser device

In a laser device, a control range of focal distance of a generated thermal lens is broadened and reliability is improved. A mode control waveguide-type laser device includes: a planar laser medium having a waveguide structure in a thickness direction of a cross section perpendicular to an optical axis, for generating gain with respect to laser light; a cladding bonded onto the laser medium; and a heat sink bonded onto the laser medium. The laser medium generates a lens effect, and the laser light oscillates in a waveguide mode in the thickness direction, and oscillates in a spatial mode due to the lens effect in a direction perpendicular to the optical axis and the thickness direction. The refractive index distribution within the laser medium is created by generating a temperature distribution in the laser medium depending on a junction area of the cladding and the heat sink.

TEMPERATURE CONTROL OF A FIBER LASER SYSTEM

Techniques and architecture are disclosed for controlling the temperature of a fiber laser system. In some embodiments, a single thermoelectric cooler (TEC) may be utilized to control the temperature of multiple system components. In some embodiments, a TEC may be physically/thermally coupled to a laser diode, which in turn may be physically/thermally coupled with a mounting plate to which one or more fiber grating holders are physically/thermally coupled, and an optical fiber that is operatively coupled with the laser diode may be physically/thermally coupled with the one or more fiber grating holders. In some embodiments, this may provide a thermal pathway/coupling between the optical fiber (e.g., its fiber grating(s)), and the TEC. In some embodiments, this may reduce/minimize the quantity of temperature control components, reduce system size/complexity, increase system dependability, and/or increase system performance/efficiency. Numerous configurations and variations will be apparent in light of this disclosure. 1. An apparatus comprising:an elongate body of thermally conductive material having at least one channel formed therein, wherein the at least one channel is configured to receive a fiber Bragg grating of an optical fiber, and wherein a depth of the channel is greater than or equal to a diameter of the optical fiber.2. The apparatus of claim 1 , wherein the thermally conductive material comprises a thermally conductive metal claim 1 , a thermally conductive composite claim 1 , and/or a thermally conductive ceramic.3. The apparatus of further comprising the fiber Bragg grating of the optical fiber.4. The apparatus of claim 1 , wherein the channel is configured to receive a quantity of thermally conductive adhesive/sealant disposed therein.5. The apparatus of claim 4 , wherein the thermally conductive adhesive/sealant comprises a thermally conductive epoxy or a thermally conductive thermoplastic/thermoset.6. The apparatus of claim 1 , wherein the elongate ...

LASER MACHINE AND CONTROLLING METHOD OF LASER MACHINE

A laser machine includes a laser oscillator, a cooler for cooling the laser oscillator, and a control unit for controlling the laser oscillator and the cooler. The control unit includes a controller that stops base discharge of the laser oscillator at a time when a specified time has elapsed from a stop of laser light emission by the laser oscillator. According to the laser machine, since base discharge of the laser oscillator is stopped after the specified time has elapsed from the stop of laser light emission, wasteful energy (power) consumption of the laser oscillator in a standby state can be restricted. 1. A laser machine comprising:a laser oscillator;a cooler for cooling the laser oscillator; anda control unit for controlling the laser oscillator and the cooler, whereinthe control unit includes a controller that stops base discharge of the laser oscillator at a time when a specified time has elapsed from a stop of laser light emission by the laser oscillator.2. The laser machine according to claim 1 , whereinthe controller reduces a supplied amount of laser gas supplied to the laser oscillator at the time when or after the specified time has elapsed.3. The laser machine according to claim 1 , whereinthe controller expands temperature control range of a cooling medium of the cooler at the time when or after the specified time has elapsed.4. The laser machine according to claim 1 , further comprisinga switch that triggers the controller in a state of the stop of laser light emission by the laser oscillator.5. A controlling method of a laser machine that includes a laser oscillator claim 1 , the method comprising:stopping base discharge of the laser oscillator at a time when a first specified time has elapsed from a stop of laser light emission by the laser oscillator.6. The controlling method of a laser machine according to claim 5 , further comprisingreducing a supplied amount of laser gas supplied to the laser oscillator at a time when a second specified time ...

EXCIMER LASER AND LASER DEVICE

An excimer laser may include a frame, a base plate on which the frame is disposed, an excimer laser configured to oscillate and output laser light by discharge-pumping within a chamber containing a laser gas, an optical element that is mounted upon the frame and that is disposed in the optical path of the outputted laser light and a heat removal mechanism connected to both the frame and the base plate. 1. An excimer laser comprising:a frame;a base plate on which said frame is disposed;an excimer laser configured to oscillate and output laser light by discharge-pumping within a chamber containing a laser gas;an optical element that is mounted upon said frame and that is disposed in the optical path of said outputted laser light; anda heat removal mechanism connected to both said frame and said base plate.2. The excimer laser according to claim 1 ,wherein said heat removal mechanism includes a heat transfer section, and two attachment sections that are attached to said frame and said base plate respectively; andsaid heat transfer section has a shape that can deform in response to displacement between said two attachment sections.3. The excimer laser according to claim 2 ,wherein said heat transfer section has a bent shape.4. The excimer laser according to claim 2 ,wherein said heat transfer section includes a mesh.5. The excimer laser according to claim 2 ,wherein the thermal conductivity of said heat transfer section is higher than the thermal conductivity of said frame.6. The excimer laser according to claim 1 , further comprising:an attitude adjustment mechanism mounted upon said base plate,wherein said frame is mounted upon a mounting surface of said attitude adjustment mechanism; andsaid attitude adjustment mechanism is configured to adjust the tilt of said mounting surface relative to said base plate.7. The excimer laser according to claim 6 ,wherein said attitude adjustment mechanism includes a lower plate section disposed upon said base plate, an upper plate ...

HEAT-SWAP DEVICE AND METHOD

A TOSA can include: a light emitting element; and one or more heating elements thermally coupled to the light emitting element so as to provide a substantially constant heat generation profile and/or temperature profile across the TOSA during a light emitting element dormant period and a light emitting element firing period. The TOSA can include a controller operably coupled with the one or more heating elements so as to control the substantially constant heat generation profile and/or temperature profile. In one aspect, the one or more heating elements can include one or more dedicated heating elements. In one aspect, the one or more of the dedicated heating elements can include a resistor element or coil. 1. A transmitting optical sub-assembly (TOSA) comprising:a light emitting element; andone or more heating elements thermally coupled to the light emitting element so as to provide a substantially constant heat generation profile and/or temperature profile across the TOSA during a light emitting element dormant period and a light emitting element firing period.2. The TOSA of claim 1 , comprising a controller operably coupled with the one or more heating elements so as to control the substantially constant heat generation profile and/or temperature profile.3. The TOSA of claim 1 , wherein the one or more heating elements includes one or more dedicated heating elements.4. The TOSA of claim 3 , wherein the one or more of the dedicated heating elements includes a resistor element or coil.5. The TOSA of claim 1 , wherein one or more of the heating elements is in contact with or adjacent to the light emitting element.6. The TOSA of claim 5 , wherein one or more of the heating elements is within 1 mm of the light emitting element.7. The TOSA of claim 1 , comprising:one or more TOSA electronic components;one or more of the heating elements thermally coupled to the one or more electronic components.8. The TOSA of claim 2 , comprising one or more thermocouples operably ...

LASER LIGHT SOURCE MODULE

A laser light source module includes a housing and a heat sink that is thermally connected to the housing. The housing includes a laser element that emits laser light, a laser holder that is made of metal to hold the laser element, a laser light receiving element that receives laser beam from the laser element, a mirror element that reflects the laser light to scan a screen, an optical element that is disposed on the optical axis of the laser light. The laser holder is thermally connected to the housing with a thermally conductive member. A protrusion is formed on the thermally conductive member. The protrusion and the springiness of the thermally conductive member are used to press the laser holder against the housing in the same direction as the direction of laser light emission. 1. A laser light source module comprising: a laser element that emits laser light;', 'a laser holder that is made of metal to hold the laser element;', 'a laser light receiving element that receives laser light from the laser element;', 'a mirror element that reflects the laser light to scan the laser light on a screen; and', 'an optical element that is disposed on an optical axis of the laser light; and, 'a housing includinga heat sink that is thermally connected to the housing;wherein the laser holder is thermally connected to the housing through a thermally conductive member having springness;wherein the thermally conductive member or the laser holder is provided with a protrusion which is configured to protrude in the same direction as a laser emission direction of the laser light; andwherein the protrusion and the springness of the thermally conductive member are used to press the laser holder against the housing in the same direction as the laser light emission direction.2. The laser light source module according to claim 1 , further comprising:a hook provided on one end of the thermally conductive member; anda slot provided on the housing,wherein the hook engages into the slot.3. ...

FIBER LASER CAVITY OPTICAL ENGINE PACKAGE AND METHOD OF MAKING THE SAME

Embodiments of the invention include a fiber laser cavity package having improved fiber management and thermal management capability and methods of making such fiber laser cavity package. Each element of the fiber laser cavity is grouped into plurality of sections and each section is placed onto a heat conducting surface within the fiber laser cavity package to dissipate unwanted heat from the elements. When the fiber laser cavity is stored in the package, the fiber laser cavity is arranged such that fiber crossings are substantially reduced or eliminated within the package. 2. The multi-layer fiber laser cavity package according to claim 1 , wherein the heat-conducting surface has a thermal conductivity claim 1 , which is equal to or greater than 1 W·m·K.3. The multi-layer fiber laser cavity package according to claim 1 , further comprises a cooling source attached to the first layer wherein the first layer has the elements claim 1 , which generates the most heat during operation; and the one or more layers stacked on top of the first layer are thermally connected to the cooling source.4. The multi-layer fiber laser cavity package according to claim 1 , wherein the one or more layers are second and third layers claim 1 , and the first layer contains the gain fiber claim 1 , the second layer stacked on top of the first layer contains the grating claim 1 , and the third layer staked on top of the second layer contains the TFB.5. The multi-layer fiber laser cavity package according to claim 1 , wherein the one or more layers comprise a second layer claim 1 , and the second layer has one or more slots to pass the fiber laser cavity from the first layer to the second layer.6. The multi-layer fiber laser cavity package according to claim 5 , wherein the gain fiber is placed on the first layer in a spiral shape and has an inner end and an outer end which are optically connected to different portions of the fiber laser cavity claim 5 , wherein the one or more slots are ...

LASER SYSTEM CHILLER

A laser system includes a laser element, a pump source configured to input light to the laser element, a first cooling circuit and a second cooling circuit. The first cooling circuit includes a first pump configured to drive a first flow of cooling liquid through a first fluid pathway, a first primary heat exchanger configured to cool the first flow of cooling liquid, and a laser element heat exchanger configured to remove heat from the laser element using the first flow of cooling liquid. The second cooling circuit includes a second pump configured to drive a flow of cooling liquid through a second fluid pathway, a second primary heat exchanger configured to cool the second flow of cooling liquid, and a pump source heat exchanger configured to remove heat from the pump source using the first and second flows of cooling liquid. 1. A laser system comprising:a laser element;a pump source configured to input light to the laser element; a first pump configured to drive a first flow of cooling liquid through a first fluid pathway;', 'a first primary heat exchanger in the first fluid pathway configured to cool the first flow of cooling liquid; and', 'a laser element heat exchanger configured to remove heat from the laser element using the first flow of cooling liquid; and, 'a first cooling circuit comprising a second pump configured to drive a flow of cooling liquid through a second fluid pathway;', 'a second primary heat exchanger in the second fluid pathway configured to cool the second flow of cooling liquid; and', 'a pump source heat exchanger configured to remove heat from the pump source using the first and second flows of cooling liquid., 'a second cooling circuit comprising2. The system of claim 1 , further comprising a valve configured to divert a portion of the first flow of cooling liquid to the second cooling circuit through a feed line.3. The system of claim 2 , wherein:the second cooling circuit comprises a reservoir of cooling liquid; andthe portion of the ...

COMPACT CO2 SLAB-LASER

A compact COslab-laser is contained in a fluid cooled housing having three compartments. One compartment houses discharge electrodes and a laser resonator. Another compartment houses a radio-frequency power supply (RFPS) assembled on a fluid-cooled chill plate and an impedance-matching network. The remaining compartment houses beam-conditioning optics including a spatial filter. The housing and RFPS chill-plate are on a common coolant-fluid circuit having a single input and a single output. The spatial filter is optionally fluid-coolable on the common coolant fluid circuit. 1. COradio frequency (RF) gas-discharge laser apparatus , comprising:a laser housing formed from an elongated metal extrusion, the extrusion configured to permit passage of coolant fluid therethrough for cooling the housing;first and second elongated discharge-electrodes located in the laser housing, spaced apart and parallel to each other defining a discharge gap therebetween, the first electrode functioning as a live-electrode and the second electrode functioning as a ground electrode the discharge-electrodes being configured to permit passage of coolant fluid therethrough for cooling the electrodes;first and second resonator mirrors defining a laser resonator extending though the discharge-gap between the discharge-electrodes; anda radio-frequency power-supply (RFPS) and an impedance-matching network located in the laser housing for supplying RF power to the electrodes for creating a RF discharge in the discharge gap for causing a laser beam to be generated in and delivered from the laser resonator, the RFPS being assembled on an elongated metal mounting-plate configured to permit passage of coolant fluid therethrough for cooling the RFPS assembled thereon.2. The apparatus of claim 1 , further including an arrangement for combining the coolant fluid passage through the metal extrusion claim 1 , the electrodes and the metal mounting plate of the RFPS into a coolant-circuit with a single coolant ...

METHOD AND DEVICE FOR EMITTING A LASER BEAM IN A HOUSING

A device for emitting a laser beam comprises, in a housing, a laser-emitting component emitting a laser beam and mounted on a base, a heat-dissipating component, at least one collimating lens, and a lens mounting. The heat-dissipating component dissipates the heat produced by the laser of the laser-emitting component and secures the base of the laser-emitting component. The heat-dissipating component has a positioning mark and at least three holes for centering pins machined together with the positioning mark. The lens mounting secures the lens opposite the laser-emitting component and is positioned relative to the heat-dissipating component by at least three centering pins positioned in the holes of the heat-dissipating component. 111-. (canceled)12. Device for emitting a laser beam , comprising in a housing:an emitter component for emitting a laser beam and mounted on a base;at least one collimating lens;a heat-dissipating component for dissipating the heat produced by a laser of the laser emitting component and securing the base of the emitter component, the heat-dissipating component having a positioning mark and at least three holes for centering pins machined together with the positioning mark; anda lens mounting for holding said at least one collimating lens in front of the emitting component, the lens mounting being positioned relative to the heat-dissipating component by at least three centering pins positioned in the holes of the heat-dissipating component.13. Device according to claim 12 , wherein the lens mounting comprises two lateral notches and a central through-aperture claim 12 , the lateral notches and the central through-aperture being positioned to allow passage of said at least three centering pins inserted into the holes for centering pins.14. Device according to claim 13 , wherein the lateral notches are oriented perpendicular to the through-aperture.15. Device according to claim 14 , wherein the lateral notches are delimited by flexible tabs ...

TEMPERATURE CONTROLLER FOR GAS LASER

A temperature controller for a gas laser which controls temperatures of a plurality of temperature-controlled apparatuses including a first temperature-controlled portion requiring a high-precision temperature-control and a second temperature-controlled portion requiring a low-precision temperature-control as compared with the first temperature-controlled portion and allowing a temperature-control with a low or high temperature as compared with the first temperature-controlled portion, comprises a first temperature control portion generating a cooling agent or a heating agent for adjusting a temperature of each first temperature-controlled portion, a second temperature control portion generating a cooling agent or a heating agent for adjusting a temperature of each second temperature-controlled portion, a first piping system connecting the first temperature control portion and each first temperature-controlled portion in parallel, and a second piping system connecting the second temperature control portion and each second temperature-controlled portion in parallel. 121.-. (canceled)22. A temperature controller for a gas laser comprising:a laser apparatus having a discharge portion to be filled up with a gaseous amplifiable agent and a discharge electrode placed in the discharge portion;a power supply electrically connected to the discharge electrode;a heat exchanger configured for cooling or heating cooling water;a pipe plumbing through the discharge electrode, the power supply and the heat exchanger, the heat exchanger supplying the cooling water to the pipe so that the cooling water passes through the discharge electrode before passing through the power supply;an energy and/or power detector configured for detecting energy and/or power of a laser light amplified by passing through the discharge portion; anda temperature control portion configured for controlling the heat exchanger based on a detection result by the energy and/or power detector.23. The temperature ...

TEMPERATURE CONTROLLER FOR GAS LASER

A temperature controller for a gas laser which controls temperatures of a plurality of temperature-controlled apparatuses including a first temperature-controlled portion requiring a high-precision temperature-control and a second temperature-controlled portion requiring a low-precision temperature-control as compared with the first temperature-controlled portion and allowing a temperature-control with a low or high temperature as compared with the first temperature-controlled portion, comprises a first temperature control portion generating a cooling agent or a heating agent for adjusting a temperature of each first temperature-controlled portion, a second temperature control portion generating a cooling agent or a heating agent for adjusting a temperature of each second temperature-controlled portion, a first piping system connecting the first temperature control portion and each first temperature-controlled portion in parallel, and a second piping system connecting the second temperature control portion and each second temperature-controlled portion in parallel. 1. A temperature controller for a gas laser which controls temperatures of a plurality of temperature-controlled apparatuses including a first temperature-controlled portion requiring a high-precision temperature-control and a second temperature-controlled portion requiring a low-precision temperature-control as compared with the first temperature-controlled portion and allowing a temperature-control with a low or high temperature as compared with the first temperature-controlled portion , the temperature controller for a gas laser comprising:a first temperature control portion generating a cooling agent or a heating agent for adjusting a temperature of each first temperature-controlled portion;a second temperature control portion generating a cooling agent or a heating agent for adjusting a temperature of each second temperature-controlled portion;a first piping system connecting the first temperature ...

METHODS, SYSTEMS, AND APPARATUS FOR HIGH ENERGY OPTICAL-PULSE AMPLIFICATION AT HIGH AVERAGE POWER

An inventive composite optical gain medium capable includes a thin-disk gain layer bonded to an index-matched cap. The gain medium's surface is shaped like a paraboloid frustum or other truncated surface of revolution. The gain medium may be cryogenically cooled and optically pumped to provide optical gain for a pulsed laser beam. Photons emitted spontaneously in the gain layer reflect off or refract through the curved surface and out of the gain medium, reducing amplified spontaneous emission (ASE). This reduces limits on stored energy and gain imposed by ASE, enabling higher average powers (e.g., 100-10,000 Watts). Operating at cryogenic temperatures reduces thermal distortion caused by thermo-mechanical surface deformations and thermo-optic index variations in the gain medium. This facilitates the use of the gain medium in an image-relayed, multi-pass architecture for smoothed extraction and further increases in peak pulse energy (e.g., to 1-100 Joules). 1. An optical gain medium comprising:a gain layer having a first refractive index; andan index-matched layer, bonded to the gain layer, having a second refractive index substantially equal to the first refractive index,wherein the optical gain medium has an exterior surface that is at least partially defined by revolving a two-dimensional curve about the longitudinal axis of the optical gain medium.2. The optical gain medium of claim 1 , wherein the gain layer comprises at least one of Yb:YAG claim 1 , Yb:YLF claim 1 , Nd:YAG claim 1 , Yb:LuAG claim 1 , Yb:SrF claim 1 , Tm:YAG claim 1 , Yb:GGG claim 1 , Yb:KYW claim 1 , Yb:KGW claim 1 , Yb:KLuW claim 1 , Yb:LuO claim 1 , Yb:YO claim 1 , Yb:S-FAP claim 1 , and Yb:Calgo.3. The optical gain medium of claim 1 , wherein the gain layer has a thickness of about 0.01 mm to about 1.0 mm and a maximum outer diameter of about 1.0 mm to about 100 mm.4. The optical gain medium of claim 1 , wherein the index-matched layer comprises at least one of YAG claim 1 , YLF LuAG claim ...

Fiber laser

The optical fiber of the present invention has an input double-clad fiber containing high-reflection FBG, an oscillation double-clad fiber, and an output double-clad fiber containing low-reflection FBG. The output double-clad fiber is formed of a core, a first clad, and a second clad. In the output double-clad fiber, a high refractive-index resin coat section recoated with high refractive-index resin whose refractive index is the same as that of the second clad or greater is disposed at a part where the second clad is partly removed between an output end and the low-reflection FBG. The refractive index of the high refractive-index resin coat section gradually increases along the direction in which light travels through the first clad.

LASER GAIN MODULE AND METHOD FOR PRODUCING SUCH A MODULE

According to one embodiment, the invention relates to a laser gain module () comprising: a laser rod () having a shaft and two optical interfaces () facing each other, the rod () being used for longitudinal or quasi-longitudinal optical pumping; and a metal cooling body (), at least one part of which is moulded around the laser rod () in order to cover all of the surfaces other than the optical interfaces in such a way that the laser gain module () forms a solid body that cannot be disassembled at ambient temperature. 1. A laser gain module comprising:a laser rod comprising two optical interfaces arranged opposing one another, the rod being intended to undergo a longitudinal or near-longitudinal optical pumping, anda metal cooling body at least a part of which is molded around the laser rod so as to cover all of the surfaces other than the optical interfaces in such a manner that the laser gain module forms a non-removable solid body at room temperature.2. The laser gain module as claimed in claim 1 , in which the cooling body comprises an internal part made of metal material molded around the laser rod claim 1 , and an external part made of metal material in contact with the internal part claim 1 , the melting point of the material forming the internal part being lower than the melting point of the material forming the external part.3. The laser gain module as claimed in claim 1 , further comprising a metal adhesion layer between the internal part of the cooling body and the laser rod.4. The laser gain module as claimed in claim 2 , wherein the material forming the external part of the cooling body is an alloy containing one selected from the group consisting of copper claim 2 , iron claim 2 , zinc claim 2 , aluminum claim 2 , silver claim 2 , gold claim 2 , platinum and tin.5. The laser gain module as claimed in claim 1 , wherein the cooling body is formed from a single material as a single part molded around the laser rod.6. The laser gain module as claimed in ...

SEMICONDUCTOR OPTICAL CRYOCOOLER

There is provided a laser cooling apparatus including: a laser for providing an emission; a silicon-on-insulator substrate; and a thin film microstructure thermally anchored to the silicon-on-insulator substrate, the thin film microstructure being made from a material selected from either a II-VI binary compound semiconductor or a II-VI tenary compound semiconductor. 1. A laser cooling apparatus including:a laser for providing an emission;a silicon-on-insulator substrate; anda thin film microstructure thermally anchored to the silicon-on-insulator substrate, the thin film microstructure being made from a material selected from either a II-VI binary compound semiconductor or a II-VI tenary compound semiconductor.2. The laser cooling apparatus as claimed in claim 1 , wherein the thin film microstructure is in a form selected from a group consisting of: nanobelts claim 1 , crystalline thin film and bulk crystal.3. The laser cooling apparatus as claimed in claim 1 , wherein the II-VI binary compound semiconductor is selected from a group consisting of: cadmium sulfur claim 1 , cadmium selenide claim 1 , cadium telluride claim 1 , zinc sulfur claim 1 , zinc selenide and zinc telluride.4. The laser cooling apparatus as claimed in claim 1 , wherein the II-VI tenary compound semiconductor is selected from a group consisting of: CdSSe claim 1 , CdSTe claim 1 , CdSeTe1 claim 1 , ZnSSe claim 1 , ZnSTe claim 1 , and ZnSeTe1.5. The laser cooling apparatus as claimed in claim 1 , wherein the silicon-on-insulator substrate is patterned with grids by e-beam lithography claim 1 , and etched by reactive ion etching.6. The laser cooling apparatus as claimed in claim 1 , wherein the laser has a wavelength below a bandgap of the II-VI binary compound.7. The laser cooling apparatus as claimed in claim 1 , wherein the laser has a power rating of less than 12 mW.8. The laser cooling apparatus as claimed in claim 1 , wherein the thin film microstructure is configured to provide high ...

Passive q-switch-type solid laser apparatus

To provide a passive Q-switch-type solid laser apparatus for outputting a high peak-power pulse laser whose pulse energy is large and pulse-time width is small. A passive Q-switch-type solid laser apparatus has: two reflection elements for forming an oscillator; a solid gain medium being disposed between the two reflection elements; a saturable absorber being disposed between the two reflection elements; an excitation device for exciting the solid gain medium; and a cross section control device for making at least one of a stimulated emission cross section of the solid gain medium and an absorption cross section of the saturable absorber closer to another one of them; and the cross section control device is equipped with at least one or both of a temperature control device for retaining the solid gain medium at a predetermined temperature and an oscillatory-wavelength control device for fixating an oscillatory wavelength at a predetermined wavelength.

DISK LASER

The different advantageous embodiments provide an apparatus and method comprising a substrate configured to increase an intensity of light at a desired wavelength. The substrate has a front side, a back side, and an outer edge. The substrate is configured to reflect the light received on the front side of the substrate. The substrate comprises ceramic. The substrate comprises a plurality of sections. The method and apparatus also comprise a material configured to attenuate the light passing between the plurality of sections. The material surrounds an edge of each section of the plurality of sections. The apparatus and method also comprise a cooling system configured to allow liquid nitrogen to be transmitted through the cooling system and receive heat generated in the substrate from the back side of the substrate. 118-. (canceled)19. A method for managing light , the method comprising:sending light from a pumping source onto a front side of a substrate comprising ceramic which is configured to increase an intensity of light at a desired wavelength;removing heat from a back side of the substrate with a cooling system configured to allow a gas to be transmitted through the cooling system, the gas being liquefied;amplifying, by the substrate, the light at a desired wavelength as the light is transmitted through the substrate; andreflecting the light to a location.20. The method of claim 19 , wherein the step of reflecting the light to the location comprises reflecting the light to the location selected from the group consisting of another substrate or a target.21. (canceled)22. The method of claim 19 , wherein the substrate comprises a number of sections including a first suppression material at a number of locations within each section of the plurality of sections claim 19 , the first suppression material comprises different sizes and shapes at each location of the number of locations claim 19 , the substrate further comprising an outer edge outside of which is second ...

METAL VAPOR CIRCULATING SYSTEM

A system for circulating an alkali vapor to operate as, for example, a gain medium in a diode pumped alkali laser. The system includes a pump configured to pump a buffer gas to a metal source. A source heat exchanger heats the alkali metal source to produce a metal vapor that flows with the buffer gas. An action chamber receives the metal vapor and buffer gas combination and contains the combination while the metal vapor performs its required functions. The metal vapor and buffer combination continue to flow to a metal vapor trap and heat exchanger that cools the metal vapor and buffer gas combination. The metal vapor trap collects alkali metal condensate as the combination cools. The diffuser transport channel provides an inflow of clean buffer gas to the pump. The pump provides a circulating gas flow through the closed loop system. 1. A system for circulating an alkali vapor comprising:a pump configured to pump a buffer gas through an infuser transport channel;a metal source disposed in the infuser transport channel for exposure to the buffer gas;a source heat exchanger configured to be thermally coupled to the metal source to produce a metal vapor to combine with the buffer gas;an action chamber disposed to receive the metal vapor and buffer gas combination from the infuser transport channel for a function that uses the metal vapor, and to flow the metal vapor and buffer gas combination into a diffuser transport channel; anda metal vapor trap heat exchanger configured to be thermally coupled to the metal vapor and buffer gas combination flowing in the diffuser transport channel;where metal condensate is collected as the metal vapor and buffer gas combination is cooled.2. The system of further comprising:a metal vapor trap disposed in the diffuser transport channel in thermal proximity to the metal vapor trap heat exchanger, the metal vapor trap configured to collect metal condensate as the metal vapor and buffer gas combination is cooled, where the diffuser ...

Wavelength-Stabilized Diode Laser

A hybrid external cavity laser (HECL) system comprises a diode laser, collection and collimation optics, and a volume Bragg grating, emits radiation at a single wavelength with a short-term wavelength stability in the order of at least one part in a billion The wavelength stability is achieved by use of a thermal management system, comprising inner and outer housings, each containing a temperature sensor, and electronic circuitry that monitors the temperatures and controls both the laser diode current and a thermoelectric cooler based on temperatures determined from said temperature sensors. The laser system is packaged in a compact enclosure that minimizes waste heat, facilitating use in applications that have heretofore employed stable, single-frequency lasers, including He—Ne lasers. 1. A device for emitting laser radiation having a stable wavelength , the device comprising: [ a diode laser having a known emission wavelength;', 'optics collecting and collimating the known emission wavelength, and', 'a volume Bragg grating optical component partially reflecting the collected and collimated known wavelength;, 'a hybrid external cavity laser comprising, 'a first temperature sensor proximate the diode laser;', 'a thermally conductive member in thermal contact with the hybrid external cavity laser and the first temperature sensor at a first surface and in thermal contact with the first housing at a second surface;, 'a thermally conductive first housing containing a second temperature sensor in contact with the second housing;', 'a thermoelectric cooler, in thermal contact with said first housing and the second housing; and', 'an opening, optically aligned to an opening in said first housing, allowing said known emission wavelength to exit said second housing;, 'a thermally conductive second housing enclosing the first housing, the second housing comprising receiving temperatures measured by at least one of the first temperature sensor and the second temperature sensor ...

Gas Laser Having A Heat Exchanger

A gas laser includes a fan for producing a flow of a laser gas and a heat exchanger including multiple heat exchanger pipes. The heat exchanger further includes two end plates to which the multiple heat exchanger pipes are secured at the opposing ends thereof. The two end plates include openings for supplying a heat exchanger fluid to the multiple heat exchanger pipes. The multiple heat exchanger pipes extend substantially transversely relative to a flow direction of the flow of laser gas. 114-. (canceled)15. A gas laser , comprising:a fan for producing a flow of laser gas; anda heat exchanger including a plurality of heat exchanger pipes and two end plates to which the plurality of heat exchanger pipes are secured at opposing ends thereof,wherein the two end plates include openings for supplying a heat exchanger fluid to the plurality of heat exchanger pipes, andwherein the plurality of heat exchanger pipes extends substantially transversely relative to a flow direction of the flow of laser gas.16. The gas laser according to claim 15 , wherein the two end plates further include channels for fluidly connecting at least two openings that are associated with different heat exchanger pipes of the plurality of heat exchanger pipes.17. The gas laser according to claim 16 , wherein at least one channel is configured to connect two heat exchanger pipes of the plurality of heat exchanger pipes.18. The gas laser according to claim 16 , wherein the two end plates include covers for closing the channels in a fluid-tight manner.19. The gas laser according to claim 15 , wherein the heat exchanger pipes of the plurality of heat exchanger pipes are orientated parallel to each other.20. The gas laser according to claim 15 , wherein heat exchanger pipes of the plurality of heat exchanger pipes are positioned in a matrix-like arrangement.21. The gas laser according to claim 20 , wherein the heat exchanger pipes of adjacent rows of the matrix-like arrangement are arranged offset ...

Amplifying apparatus and amplifying medium

An amplifying apparatus includes an optical fiber that includes a wound portion doped with a rare earth element and three-dimensionally wound, holes being formed in cladding of the optical fiber and surrounding a core of the optical fiber, the optical fiber transmitting signal light injected thereinto; a thermally conductive member in which the wound portion of the optical fiber embedded, the thermally conductive member having thermal conductivity; a light source that emits excitation light; an injecting unit that injects the excitation light emitted by the light source, into the optical fiber; and a temperature adjusting unit that includes a thermal coupling unit thermally connected to the light source and the thermally conductive member, the temperature adjusting unit adjusting a temperature of the thermal coupling unit.

WEAPONS SYSTEM HAVING AT LEAST TWO HEL EFFECTORS

A weapons system with at least two HEL effectors, which have at least one beam guidance system, the use of only one laser source or one pump source for the at least two HEL effectors is provided. The beam guidance systems of the HEL effectors resort to the common laser source or common pump source. An optical link of the common laser source or of the common pump source with the beam guidance system, be it direct or indirect, is implemented by means of at least one optical switching unit, and so at least one functional, complete HEL effector of the weapons system is provided to defend against threats. 1. A weapons system comprising:at least two HEL effectors, each of the at least two HEL effectors comprising at least one beam guidance system; andat least one jointly useable laser source or pump source for the at least two HEL effectors.2. The weapons system as claimed in claim 1 , wherein the at least one laser source is connectable to the at least two beam guidance systems via at least one optical switching unit installed between an output of the laser unit and an input of the beam guidance systems to form the HEL effectors.3. The weapons system as claimed in claim 1 , wherein the at least one pump source is connectable via at least one optical switching unit disposed between an output of the pump unit and an input of an oscillator of the respective HEL effectors to form the HEL effectors.4. The weapons system as claimed in claim 1 , wherein the at least one pump source is connectable via at least one optical switching unit disposed between an output of the pumping unit and an input of an amplifier of an MOPA of the respective HEL effector to create the HEL effectors.5. The weapons system as claimed in claim 1 , wherein the at least one pumping unit is connectable via at least one optical switching unit disposed between an output of the pump unit and an input of an amplifier of the respective HEL effector and at least one master oscillator is connectable via at ...

LASER BEAM AMPLIFICATION DEVICE

A laser medium unit in a laser beam amplification device includes a plurality of laser media . A cooling medium flow path F is provided around the laser medium unit to cool the laser medium unit from outside. A sealed space between the laser media is filled with gas or liquid, and a laser beam for passing through the sealed space is not interfered by a cooling medium flowing outside. Therefore, a fluctuation of an amplified laser beam is prevented, and a quality such as stability and focusing characteristics of the laser beam is improved. 1: A laser beam amplification device comprising:a laser medium unit;an excitation light source configured to cause excitation light to enter the laser medium unit; anda cooling medium flow path configured to be arranged around the laser medium unit,wherein the laser beam amplification device amplifies and outputs a laser beam input to the laser medium unit;wherein the laser medium unit comprises:a plate-like first laser medium,a plate-like second laser medium, anda sealing material arranged between the first and the second laser media;wherein the first and the second laser media are aligned along a thickness direction of the first and the second laser media; andwherein a space between the first and the second laser media is a sealed space and is under a reduced pressure environment or is filled with gas.2: The laser beam amplification device according to claim 1 , whereinmaterials of the first and the second laser media are ceramic laser media.3: The laser beam amplification device according to claim 1 , whereinthe laser medium unit includes a pair of flanges arranged opposed to each other andthree or more support columns for connecting the flanges and capable of adjusting a distance between the flanges,an alignment direction of the first and the second laser media coincides with a longitudinal direction of the support column, anda pressure to be applied to the sealing material is adjustable by adjusting the distance between the ...

Diode Pumped High Peak Power Laser System for Multi-Photon Applications

The present application discloses various embodiments of a high peak power laser system which includes a diode pump source configured to directly pump at least one optical crystal positioned within the laser cavity, the diode pump source emitting at least one pump beam comprised of two or more vertically stacked optical signals having a wavelength from about 400 nm to about 1100 nm., the optical crystal configured to output at least one optical output having a wavelength of about 750 nm to about 1100 nm and having an output power of about 25 kW or more. 1. A diode pumped high peak power laser system , comprising:at least one diode pump system configured to output at least one pump beam, the pump beam comprising two or more vertically stacked optical signals having a wavelength from about 400 nm to about 1100 nm;at least one laser cavity formed by at least one high reflectivity mirror and at least one output coupler;at least one optical crystal positioned within the laser cavity and configured to be pumped by the pump beam, the optical crystal configured to output at least one optical output having a wavelength of about 750 nm to about 1100 nm and having an output power of about 25 kW or more.2. The diode pumped high peak power laser system of wherein the diode pump system comprises a first diode pump system configured to output a first diode source signal and at least a second diode pump system configured to output at least a second diode pump signal.3. The diode pumped high peak power laser system of further comprising at least one signal combiner positioned within the diode pump system claim 2 , the signal combiner configured to receive and vertically position the first diode source signal and second diode source signal along a common vertical axis to produce at least one vertically stacked output signal.4. The diode pumped high peak power laser system of further comprising at least one signal combiner positioned within the diode pump system claim 3 , the signal ...

SYSTEMS, TOOLS AND METHODS FOR WELL DECOMMISSIONING

There are provided high power laser systems for performing decommissioning of structures in land based boreholes, and wells, offshore, and other remote and hazardous locations, and using those system to perform decommissioning operations. In particular embodiments the laser system is a Class I system and reduces emission of materials created during laser cutting operations. The laser systems can include lifting and removal equipment for removing laser sectioned material. 1. A system for surface decommission of wells , the system comprising:a. laser unit, the laser unit comprising: a chiller; a laser source, the laser source capable of generating at least a 10 kW laser beam; a control systems; and, a control counsel;b. a deployment crane;c. a laser tool comprising a shielding and exhaust gas collection housing;d. a gate door on the laser unit, the gate door having and upper and a lower section, whereby the lower section is hingidly attached to the unit;e. the deployment crane mounted on the upper section of the gate door, whereby when the gate door is opened the upper section is a greater distance from the unit than the lower section; and,f. the laser tool comprising: a first assembly; a second assembly; whereby the second assembly is rotatable with respect to the first assembly; and, the second assembly housing a laser beam path.250-. (canceled) This application:Embodiments of the present inventions relate to methods, apparatus and systems for the delivery of high power laser beams to cut and remove structures in the earth, and in particular, for surface decommissioning activities for hydrocarbon wells, among other things. The present inventions also relate to the laser welding of surfaces and materials, and in particular such surfaces and materials that are located in remote, hazardous, optically occluded and difficult to access locations, such as: oil wells, boreholes in the earth, pipelines, underground mines, natural gas wells, geothermal wells, subsea ...

Crystal Laser Comprising A System For Cooling The Crystal With A Fluid

A crystal laser including a doped crystal, and a system for cooling the crystal. This cooling system includes: a support including a first and a second surfaces; a device for fastening the crystal to the first surface of the support to form a tight cavity between a first surface of the crystal and the first surface of the support; a circuit for supplying the tight cavity with a liquefied gas; and a device for cooling the second surface of the support. 1. A crystal laser comprising a doped crystal and a system for cooling the crystal , wherein the cooling system comprises:a support comprising a first surface and a second surfaces;a device for fastening the crystal to the first surface of the support to form a tight cavity between a first surface of the crystal and the first surface of the support;a circuit for supplying the tight cavity with a liquefied gas; anda device for cooling the second surface of the support.2. The crystal laser of claim 1 , wherein the fastening device comprises:an element housing the crystal at a distance from the first surface of the support and surrounding a second surface of the crystal; anda flexible joint housed between the second surface of the crystal and the element housing the crystal, the joint being capable of deforming under the effect of a bending of the crystal on the second surface of the crystal.3. The crystal laser of claim 1 , wherein the liquefied gas pressure is selected so that the liquefied gas remains liquid in a temperature range such that the saturation pressure is smaller than 2 bars.4. The crystal laser of claim 1 , wherein the gas comprised in the liquefied gas is in sub-saturation.5. The crystal laser of claim 4 , wherein the circuit for supplying the cavity is capable of controlling the liquefied gas pressure to define a saturation temperature of said gas greater by at least 50 K than the temperature of the liquefied gas.6. The crystal laser of claim 1 , wherein the liquefied gas is dioxygen claim 1 , ethane ...

SYSTEMS, TOOLS AND METHODS FOR WELL DECOMMISSIONING

There are provided high power laser systems for performing decommissioning of structures in land based boreholes, and wells, offshore, and other remote and hazardous locations, and using those system to perform decommissioning operations. In particular embodiments the laser system is a Class I system and reduces emission of materials created during laser cutting operations. The laser systems can include lifting and removal equipment for removing laser sectioned material. 1. A system for surface decommission of wells , the system comprising:a. laser unit, the laser unit comprising: a chiller; a laser source, the laser source capable of generating at least a 5 kW laser beam; a control systems; and, a control counsel;b. a deployment crane;c. a laser tool comprising a shielding and exhaust gas collection housing;d. a gate door on the laser unit, the gate door having and upper and a lower section, whereby the lower section is hingidly attached to the unit;e. the deployment crane mounted on the upper section of the gate door, whereby when the gate door is opened the upper section is a greater distance from the unit than the lower section; and,f. the laser tool comprising: a first assembly; a second assembly; whereby the second assembly is rotatable with respect to the first assembly; and, the second assembly housing a laser beam path.2. The tool of claim 1 , wherein a high power optical fiber extends through the first assembly.3. The tool of claim 1 , wherein the first assembly comprises an optical slip ring.4. The tool of claim 1 , wherein the first assembly comprises an optical slip ring and wherein a high power optical fiber is in optical communication with the optical slip ring.5. The system of claim 1 , wherein the tool as deployed during normal operation is classified as having an accessible emission limit of 2.0×10kkWcmsrradiance or less.6. The tool of claim 1 , wherein the tool as deployed during normal operation has an accessible emission limit of 2.0× ...

TUNABLE LIGHT SOURCE

Provided herein is an external-cavity type wavelength tunable laser including gain medium configured to generate an optical signal and amplify the generated optical signal based on a bias current applied; an external reflector configured to be coupled optically with the gain medium; a second thermistor provided on the side of the gain medium and configured to measure a temperature of the gain medium; a first thermistor provided on the external reflector and configured to measure a temperature of the external reflector; and a thermoelectric cooler configured to transfer generated heat based on the temperatures measured by the first and second thermistors.

Optical fiber for a fiber laser, fiber laser, and production method for optical fiber for a fiber laser

An optical fiber for a fiber laser includes a core to which a rare-earth element is added, a first cladding formed around the core; and a second cladding formed around the first cladding, and excitation light is guided from at least one end of the first cladding to excite the rare-earth element to output a laser oscillation light. An addition concentration of the rare-earth element to the core is different in a longitudinal direction of the optical fiber for a fiber laser, and a core diameter and a numerical aperture of the optical fiber for a fiber laser are constant in the longitudinal direction of the optical fiber for a fiber laser.

Gas laser oscillator apparatus and laser gas replacement method

The gas laser oscillator apparatus of the present invention has laser gas sealed in a vacuum chamber under a decompressed condition lower than atmospheric pressure; a discharge means for exciting the laser gas; a blower means for blowing the laser gas; a laser-gas flow passage as a circulation passage of the laser gas between the discharge means and the blower means; and a gas compression means for discharging a predetermined amount of the laser gas from the laser-gas flow passage. The gas decompression means is structured on the application of Bernoulli's principle. The gas decompression means has a sequence for decreasing the ratio of air mixed into the laser gas below a predetermined level with use of a part of pressurized gas used in a laser processing machine or the gas laser oscillator apparatus.

DISCHARGE-PUMPED GAS LASER DEVICE

A discharge-pumped gas laser device may include a laser chamber, a pair of discharge electrodes provided in the laser chamber, a fan with a magnetic bearing being provided in the laser chamber and configured to be capable of circulating a gas in the laser chamber, a housing configured to contain the laser chamber, and a magnetic bearing controller connected to the magnetic bearing electrically, being capable of controlling the magnetic bearing, and provided in the housing separately from the laser chamber. 1. A discharge-pumped gas laser device , comprising:a laser chamber;a pair of discharge electrodes provided in the laser chamber;a fan with a magnetic bearing being provided in the laser chamber and configured to be capable of circulating a gas in the laser chamber;a housing configured to contain the laser chamber; anda magnetic bearing controller connected to the magnetic bearing electrically, being capable of controlling the magnetic bearing, and provided in the housing separately from the laser chamber.2. The discharge-pumped gas laser device as claimed in claim 1 , wherein the laser chamber is independently replaceable while the fan is separated from the magnetic bearing controller.3. A discharge-pumped gas laser device claim 1 , comprising:a laser chamber configured to generate laser light;a pair of discharge electrodes provided in the laser chamber;a fan with a magnetic bearing being provided in the laser chamber and configured to be capable of circulating a gas in the laser chamber;a housing configured to contain the laser chamber;a magnetic bearing controller connected to the magnetic bearing electrically, being capable of controlling the magnetic bearing, and provided in the housing separately from the laser chamber; anda laser controller configured to control generation of the laser light.4. The discharge-pumped gas laser device as claimed in claim 3 , wherein the fan includes a rotor and the magnetic bearing includes a magnetic floatation actuator ...

METHOD AND APPARATUS FOR STARTING AN OPTICAL MODULE

The application discloses a method and apparatus for starting an optical module, the method including: adjusting temperature of a laser device of the optical module to a first temperature higher than a normal operating temperature of the laser device of the optical module; powering up the laser device of the optical module using a first current lower than a normal operating current of the laser device; and adjusting the temperature of the laser device of the optical module from the first temperature to the normal operating temperature according to a second temperature corresponding to each adjustment, and adjusting the current of the laser device of the optical module from the first current to the normal operating current according to a second current corresponding to each adjustment, for a preset times of adjustment. 1. A method for starting an optical module , the method comprising:adjusting temperature of a laser device of the optical module to a first temperature higher than a normal operating temperature of the laser device of the optical module;powering up the laser device of the optical module using a first current lower than a normal operating current of the laser device; andadjusting the temperature of the laser device of the optical module from the first temperature to the normal operating temperature according to a second temperature corresponding to each adjustment, and adjusting the current of the laser device of the optical module from the first current to the normal operating current according to a second current corresponding to each adjustment, for a preset times of adjustment.2. The method according to claim 1 , the second current and the second temperature corresponding to each adjustment are determined in such a way that:the second current and the second temperature are preset; orthe second current and the second temperature corresponding to each adjustment are determined according to the first temperature, the first current, the normal operating ...

Compact, thermally stable multi-laser engine

Various embodiments of a multi-laser system are disclosed. In some embodiments, the multi-laser system includes a plurality of lasers, a plurality of laser beams, a beam positioning system, a thermally stable enclosure, and a temperature controller. The thermally stable enclosure is substantially made of a material with high thermal conductivity such as at least 5 W/(m K). The thermally stable enclosure can help maintain alignment of the laser beams to a target object over a range of ambient temperatures. Various embodiments of an optical system for directing light for optical measurements such laser-induced fluorescence and spectroscopic analysis are disclosed. In some embodiments, the optical system includes a thermally conductive housing and a thermoelectric controller, a plurality of optical fibers, and one or more optical elements to direct light emitted by the optical fibers to illuminate a flow cell. The housing is configured to attach to a flow cell.

LASER APPARATUS

A laser apparatus may include a master oscillator configured to output a laser beam, at least one amplifier provided in a beam path of the laser beam, at least one saturable absorber gas cell provided downstream from the at least one amplifier and configured to contain a saturable absorber gas for absorbing a part of the laser beam, the part of the laser beam having a beam intensity equal to or lower than a predetermined beam intensity, a fan provided in the saturable absorber gas cell and configured to cause the saturable absorber gas to circulate, and a heat exchanger provided in the saturable absorber gas cell and configured to cool the saturable absorber gas. 1. A laser apparatus , comprising:a master oscillator configured to output a laser beam;at least one amplifier provided in a beam path of the laser beam;at least one saturable absorber gas cell provided downstream from the at least one amplifier and configured to contain a saturable absorber gas for absorbing a part of the laser beam, the part of the laser beam having a beam intensity equal to or lower than a predetermined beam intensity;a fan provided in the saturable absorber gas cell and configured to cause the saturable absorber gas to circulate; anda heat exchanger provided in the saturable absorber gas cell and configured to cool the saturable absorber gas.2. The laser apparatus according to claim 1 , wherein the fan is provided such that a rotation shaft thereof is substantially parallel to a beam path of the laser beam and such that a circulation flow of the saturable absorber gas generated by the fan is contained in the beam path of the laser beam.3. The laser apparatus according to claim 2 , wherein the heat exchanger extends substantially parallel to the beam path of the laser beam and is arranged in the circulation flow of the saturable absorber gas generated by the fan.4. The laser apparatus according to claim 3 , wherein the fan is a cross flow fan.5. The laser apparatus according to claim 1 , ...

LASER UNIT AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

There may be provided a laser unit including a display configured to display one or both of electric power consumed by the laser unit and electric energy consumed by the laser unit. 1. A laser unit comprising:a pair of electrodes;a fan configured to make flow of gas fed to a clearance between the electrodes;a motor configured to rotate the fan; anda display configured to display one or both of electric power consumed by the laser unit and electric energy consumed by the laser unit,the electric power consumed by the laser unit including electric power consumed by the motor,the electric energy consumed by the laser unit including electric energy consumed by the motor,the electric power consumed by the motor being calculated based on pressure of the gas fed to the clearance between the electrodes, andthe electric energy consumed by the motor being calculated based on the pressure of the gas fed to the clearance between the electrodes.2. The laser unit according to claim 1 , further comprising a charger configured to apply a voltage between the electrodes claim 1 , whereinthe electric power consumed by the laser unit includes one or more of electric power consumed by the charger, the electric power consumed by the motor, and a sum of the electric power consumed by the charger and the electric power consumed by the motor, andthe electric energy consumed by the laser unit includes one or more of electric energy consumed by the charger, the electric energy consumed by the motor, and a sum of the electric energy consumed by the charger and the electric energy consumed by the motor.3. The laser unit according to claim 2 , wherein the electric energy consumed by the charger is obtained by integrating the electric energy consumed through applying the voltage to the pair of electrodes.4. The laser unit according to claim 2 , further comprising a standby-power supply configured to supply the laser unit with standby electric power claim 2 , whereinthe electric power consumed by ...

AN ACTIVE OPTICAL FIBRE

An active optical fibre, including: a core; an inner cladding substantially surrounding the core, whereby the core and the inner cladding form an area configured to propagate pump radiation; an outer cladding comprised of at least a third material with at least a third refractive index substantially surrounding the inner cladding, the third refractive index being smaller than the second refractive index, whereby the outer cladding confines pump radiation to the core and the inner cladding; and a coating comprised of a thermally conductive material substantially surrounding the outer cladding, wherein the inner cladding is configured to reduce impact of spatial hole-burning on absorption of the pump radiation as the pump radiation propagates through the active optical fibre, and wherein the thermally conductive material of the coating supports a reduced temperature increase between the area and an outer surface of the coating. 1. An active optical fibre , including:a core comprised of at least a first material with at least a first refractive index;an inner cladding comprised of at least a second material with at least a second refractive index substantially surrounding the core, whereby the core and the inner cladding form an area configured to propagate pump radiation from a pump laser coupled to the optical fibre;an outer cladding comprised of at least a third material with at least a third refractive index substantially surrounding the inner cladding, the third refractive index being smaller than the second refractive index, whereby the outer cladding confines pump radiation from the pump laser to the core and the inner cladding; anda coating comprised of a thermally conductive metal, graphite or other material substantially surrounding the outer cladding,wherein the inner cladding is configured to reduce impact of spatial hole-burning on absorption of the pump radiation as the pump radiation propagates through a length of the active optical fibre, andwherein the ...

Laser oscillation cooling device

A laser oscillation cooling device ( 100 ) includes a light emitting section ( 1 ) that emits laser excitation light (Z 1 ), a laser excitation section ( 2 ) that excites the laser excitation light (Z 1 ) to emit laser light (Z 2 ) and has a heat generating region (S) where heat is locally generated, a storage tank ( 3 ) capable of storing an extremely low temperature liquid (L), a pressurizing section ( 31 ) that brings the extremely low temperature liquid (L) into a sub-cool state by pressurizing the inside of the storage tank ( 3 ), and a jetting supply section ( 4 ) that removes heat from the laser excitation section ( 2 ) by jetting the extremely low temperature liquid (L) in the sub-cool state from a plurality of jet ports arrayed in a two-dimensional manner to the laser excitation section ( 2 ).

METHODS OF DRIVING LASER DIODES, OPTICAL WAVELENGTH SWEEPING APPARATUS, AND OPTICAL MEASUREMENT SYSTEMS

An optical wavelength sweeping apparatus having a laser diode with an active region, and a coupled pulse generator is disclosed. The pulse generator is configured and operable to provide current drive pulses of relatively short duration and high amplitude to the laser diode to selectively and rapidly heat the active region and the immediate vicinity and produce a rapid wavelength sweep of emitted optical radiation. Methods of driving a laser diode, and measurement systems are disclosed, as are other aspects. 1. A method of driving a laser diode , comprising:providing a laser diode having an active region; andselectively and rapidly heating the active region and an immediate vicinity by applying current pulses to perform a wavelength sweep of emitted optical radiation.2. The method of claim 1 , wherein the selectively and rapidly heating comprises applying a current pulse amplitude of greater than about five times larger than a maximum declared continuous DC drive current of the laser diode.3. The method of claim 1 , wherein the selectively and rapidly heating comprises applying a current pulse amplitude of between about 5 times to about 300 times larger than a maximum declared continuous DC drive current of the laser diode.4. The method of claim 1 , wherein the selectively and rapidly heating comprises application of a short-duration current drive pulse having a pulse duration of less than 50 μs.5. The method of claim 4 , wherein the pulse duration comprises less than 10 μs.6. The method of claim 4 , wherein the pulse duration comprises less than 1 μs.7. The method of claim 4 , wherein the pulse duration comprises less than 500 ns.8. The method of claim 1 , wherein the laser diode is a distributed feedback (DFB) diode.9. The method of claim 1 , wherein the active region comprises a thickness of less than 1 um claim 1 , an active region cross-section of less than 7 um claim 1 , and a ratio of active region volume to total laser diode volume of less than 1/300.10. The ...

GAS LASER DEVICE

A COgas laser device according to the present invention amplifies COlaser light that oscillates repeatedly in short pulses having a pulse width of 100 ns or less, and cools a CO2 laser gas which is excited by continuous discharge by circulating the CO2 laser gas by means of forced convection. Therein, an angle θ defined by the optical axis of the amplified COlaser beam and the flow direction of the COlaser gas caused by the forced convection is determined by both a discharge cross sectional area and a discharge length of a volume in which the COlaser gas is excited by discharge, whereby increasing the gain of pulsed laser to achieve pulsed laser light having an extremely high average output power. 16-. (canceled)7. A COgas laser device for amplifying COlaser light which repeatedly oscillates in a short pulse having a pulse width of 100 ns or less , wherein a COlaser gas which is excited by continuous discharge is cooled by circulating the gas by forced convection , the COgas laser device comprising:{'sub': 2', '2, 'claim-text': {'br': None, 'i': S', 'L, 'sub': 'D', 'θ≧arcsin(8/π×sqrt()/),'}, 'a plurality of amplifiers, wherein an angle θ defined by an optical axis of the amplified COlaser light and a flow direction of the COlaser gas caused by forced convection (0 degree≦θ≦90 degrees) is determined by the following equation{'sub': D', '2, 'wherein Sis a discharge cross sectional area of a volume in which the COlaser gas is excited by discharge, and L is a discharge length of the volume,'}{'sub': '2', 'the plurality of amplifiers each including discharge electrodes which are opposite to each other, between which the COlaser gas is interposed,'}{'sub': 2', '2', '2', '2, 'the plurality of amplifiers including a plurality of first amplifiers and a second amplifier, the first amplifier amplifies the COlaser beam along a path which passes once through the COlaser gas, the second amplifier amplifies the COlaser beam along a folded path which passes at least twice through ...

Cooling Laser Gas

A cooling arrangement for cooling laser gas for a gas laser includes a first cooling circuit having a first cooling assembly and a first heat exchanger for cooling laser gas which flows from a fan to a resonator of the gas laser, and a second cooling circuit which is independent of the first and which has a second cooling assembly and a second heat exchanger for cooling laser gas which flows from the resonator to the fan. The second cooling circuit has at least one additional heat exchanger for additionally cooling the laser gas which flows from the fan to the resonator.

LASER DEVICE

An optical path cover is located on an optical path through which beam light travels. The optical path cover includes a cylindrical portion through which the beam light is capable of passing. A plurality of protruding portions are formed on inner walls of the cylindrical portion, the inner walls facing toward a side of an optical axis of the beam light. The protruding portions, each of which has a convex shape in cross-section taken perpendicularly to the optical axis, are arranged next to each other with the convex shape facing toward the side of the optical axis. Each of the protruding portions has an elongated shape extending along the optical axis. 1. An laser device comprising an optical path cover to be located on an optical path through which beam light travels , whereinthe optical path cover includes a cylindrical portion through which the beam light is capable of passing, the cylindrical portion having a rectangular cylindrical shape, whereinon an inner wall of the cylindrical portion, the inner wall facing toward a side of an optical axis of the beam light, a plurality of protruding portions are formed, each of which has a convex shape in cross-section taken perpendicularly to the optical axis, while having an elongated shape along the optical axis, the protruding portions being arranged next to each other with the convex shape facing toward the side of the optical axis,the protruding portions are provided on each of inner walls facing each other in a certain direction in which a larger amount of unwanted light generated due to characteristics of the beam light diverges as compared to other directions, the certain direction being one direction perpendicular to the optical axis, the protruding portions protruding in the one direction, andeach of inner walls facing each other in a direction perpendicular to the optical axis and perpendicular to the one direction has a flat surface.2. The laser device according to claim 1 , wherein the inner wall has ...

TECHNIQUES FOR THERMAL MANAGEMENT WITHIN OPTICAL SUBASSEMBLY MODULES AND A HEATER DEVICE FOR LASER DIODE TEMPERATURE CONTROL

The present disclosure is generally directed to techniques for thermal management within optical subassembly modules that include thermally coupling heat-generating components, such as laser assemblies, to a temperature control device, such as a thermoelectric cooler, without the necessity of disposing the heat-generating components within a hermetically-sealed housing. Accordingly, this arrangement provides a thermal communication path that extends from the heat-generating components, through the temperature control device, and ultimately to a heatsink component, such as a sidewall of a transceiver housing, without the thermal communication path extending through a hermetically-sealed housing/cavity. 1. A heater device for use within transmitter optical subassemblies (TOSAs) , the heater device comprising:a base;a resistive heating element disposed on the base;an electrical conductor disposed at least partially on the resistive heating element, the electrical conductor to electrically connect a laser diode (LD) with associated LD driving circuitry;a layer of electrically insulating material disposed between the electrical conductor and the resistive heating element; andwherein the layer of electrically insulating material thermally couples the resistive heating element to the electrical conductor to communicate heat generated by the resistive heating element to the LD via the electrical conductor, and wherein the layer of electrically insulating material electrically isolates the resistive heating element from the electrical conductor.2. The heater device of claim 1 , wherein the base comprises a material with a thermal conductivity of 1.5 Watts per meter-Kelvin (W/m-K) or less.3. The heater device of claim 1 , wherein the base comprises Quartz.4. The heater device of claim 1 , wherein the base comprises a cuboid shape.5. The heater device of claim 1 , wherein the base comprises a plurality of projections defined by a groove claim 1 , the plurality of projections ...

Gas laser device and condenser

A gas laser device may include: a laser chamber containing laser gas; a first discharge electrode disposed in the laser chamber; a second discharge electrode disposed to face the first discharge electrode in the laser chamber; and a condenser including a polyimide dielectric and configured to supply power to between the first discharge electrode and the second discharge electrode.

TRANSITION-METAL-DOPED THIN-DISK LASER

A laser includes a Ti:sapphire gain-medium in the form of a thin-disk. The thin-disk gain-medium is optically pumped by pump-radiation pulses having a wavelength in the green region of the electromagnetic spectrum. The pump-radiation pulses have a duration less than twice the excited-state lifetime of the gain-medium. 1. An optical apparatus , comprising:an optical resonator;a Ti:sapphire gain medium located within the optical resonator, the gain-medium having an excited-state lifetime of about 3.2 microseconds, the gain medium being in the form of a thin-disk having a ratio of disk diameter to disk thickness of at least five;a heat sink in thermal communication with the gain medium;a pump-laser arranged to deliver repeated pulses of radiation having a wavelength absorbed by the gain medium, wherein the pulses have a duration less than 1.0 microseconds; anda multi-pass optical arrangement for causing each of the pump laser pulses to make a plurality of incidences on the gain-medium with a fraction of the energy in the pulse being absorbed by the gain-medium on each incidence.2. The apparatus of claim 1 , wherein the pump pulses have an energy-per-pulse greater than about 5 millijoules.3. The apparatus of claim 2 , wherein the pump pulses are delivered at a pulse-repetition frequency between about 1 and 100 kilohertz.4. The apparatus of claim 3 , wherein the optical resonator is a laser resonator claim 3 , the pump-laser pulses energize the gain-medium causing laser radiation having a fundamental wavelength characteristic of the gain medium to circulate in the laser resonator claim 3 , and the optical resonator is arranged to deliver the fundamental radiation as output radiation.5. The apparatus of claim 3 , wherein the optical resonator is a resonator of a regenerative amplifier and includes an optical-switch arrangement for switching seed-pulses from a seed-pulse laser into the resonator to be amplified by the gain medium claim 3 , and switching amplified pulses ...

LASER APPARATUS AND EXTREME ULTRAVIOLET LIGHT GENERATION APPARATUS

Kinematic mounts have three points having zero degree of freedom, one degree of freedom, and two degrees of freedom, respectively. As viewed from a direction perpendicular to a plane containing the three points, an extension of an entrance optical axis of a laser beam to an amplifying apparatus or an extension of an exit optical axis from the amplifying apparatus is oriented to the point with the zero degree of freedom. A translational direction of the point with the one degree of freedom is oriented to the point with the zero degree of freedom. One of the extension of the entrance optical axis and the extension of the exist optical axis passes on a side closer to the point with the two degrees of freedom with respect to a side of the point with the one degree of freedom. 1. A laser apparatus , comprising an amplifying apparatus mounted onto a base frame through intermediation of a kinematic mount ,wherein the kinematic mount contains three points having zero degree of freedom, one degree of freedom, and two degrees of freedom, respectively,wherein an extension of an entrance optical axis of a laser beam to the amplifying apparatus or an extension of an exit optical axis of the laser beam from the amplifying apparatus is oriented to a point with the zero degree of freedom as viewed from a direction perpendicular to a plane containing the three points,wherein a translational direction of a point with the one degree of freedom is oriented to the point with the zero degree of freedom, andwherein one of the extension of the entrance optical axis and the extension of the exit optical axis passes on a side closer to a point with the two degrees of freedom with respect to a side of the point with the one degree of freedom.2. A laser apparatus according to claim 1 , wherein one of the extension of the entrance optical axis and the extension of the exit optical axis further passes on the side closer to the one degree of freedom with respect to the side of the two degrees of ...

Laser oscillator

In a laser oscillator, a pair of electrodes is disposed in a housing into which a gas is sealed, a waveguide is formed by the pair of electrodes, and a laser beam is configured to be extracted from an end of the housing. The laser oscillator includes a mirror holder attached to an end of the electrode, the end serving as an end of the waveguide, and a reflection mirror attached to the mirror holder and reflecting a laser beam generated in the waveguide. In the laser oscillator, a passage through which a cooling medium is passed is formed inside each of the pair of electrodes.

IMPINGEMENT COOLING DEVICE FOR A LASER DISK AND ASSOCIATED LASER DISK MODULE

Impingement cooling devices for a laser disk include a carrier plate on the front side of which the laser disk can be secured, and a supporting structure, on the front side of which the rear side of the carrier plate is secured. The supporting structure has a plurality of cooling liquid feed lines from which the cooling liquid emerges in the direction of the rear side of the carrier plate and a plurality of cooling liquid return lines. The feed and return lines run parallel to one another in the longitudinal direction of the supporting structure, and the supporting structure includes a plurality of cutouts or the rear side of the carrier plate that are open toward the supporting structure, and the cooling liquid feed lines lead into and the cooling liquid return lines lead away from the plurality of cutouts. 1. An impingement cooling device for a laser disk , the impingement cooling device comprising:a carrier plate configured to secure the laser disk on a front side and having a rear side;an impingement cooling area for cooling the carrier plate by a cooling liquid;a supporting structure secured on a front side thereof to the rear side of the carrier plate, and 'a plurality of cooling liquid feed lines from which the cooling liquid emerges towards the rear side of the carrier plate, and', 'wherein the supporting structure comprises'} a plurality of cutouts in a region adjoining the rear side of the carrier plate that are closed toward the rear side of the carrier plate,', 'wherein the cooling liquid feed lines lead into the plurality of cutouts and the cooling liquid return lines lead away from the plurality of cutouts and wherein the feed lines are each formed by a separate tube that is arranged in a through-channel of the supporting body, and the return lines in the supporting body are respectively formed by a gap between the through-channel and the tube, or vice versa., 'a plurality of cooling liquid return lines, wherein the feed and return lines run parallel ...

METHODS AND APPARATUS TO THERMALLY MANAGE HEAT SOURCES USING EUTECTIC THERMAL CONTROL

Methods and apparatus to thermally manage heat sources using eutectic thermal control are disclosed. A disclosed example apparatus includes a cooling block to be thermally coupled to a heat generation source of an aircraft, and eutectic metal alloy disposed within cavities of the cooling block. 1. An apparatus comprising:a cooling block to be thermally coupled to a heat generation source of an aircraft; andeutectic metal alloy disposed within cavities of the cooling block.2. The apparatus as defined in claim 1 , further including a heat sink array to be thermally coupled to or integral with the cooling block.3. The apparatus as defined in claim 2 , wherein the heat sink array extends past an outer surface of a fuselage of the aircraft.4. The apparatus as defined in claim 1 , further including a foam expansion material disposed within the cavities.5. The apparatus as defined in claim 1 , further including fluid flow channels disposed in the cooling block.6. The apparatus as defined in claim 5 , further including fluid pathways that fluidly couple the fluid flow channels to an external surface to allow fluid to flow out from the external surface.7. The apparatus as defined in claim 1 , wherein the eutectic metal alloy includes at least one of bismuth claim 1 , lead or tin.8. The apparatus as defined in claim 1 , wherein the cooling block includes at least one of aluminum or beryllium.9. The apparatus as defined in claim 1 , wherein the cavities have a generally star-shaped cross-sectional profile.10. The apparatus as defined in claim 1 , wherein the cavities have a generally oblong irregular cross-sectional profile.11. The apparatus as defined in claim 1 , wherein the cavities exhibit a sheet-like shape at least partially defining an outer surface of the aircraft.12. A method comprising:generating, via a laser generator, a laser output, wherein the laser generator is thermally coupled to a block including cavities that have a eutectic metal alloy disposed within.13. ...

Fast axis thermal lens compensation for a planar amplifier structure

Systems and methods described herein provide a thermally compensated waveguide structure having a thermal index profile configured to correct thermal aberrations caused by temperature gradients in a fast axis direction and/or correct other forms of distortions in an output beam generated by the waveguide structure. The waveguide structure includes a core region, one or more cladding, and one or more heat sinks. A geometry of these portions with respect to each other can provide a cold refractive index profile such that a cold refractive index value of a portion of the core region is less than a cold refractive index value of at least one of the one or more cladding regions. Responsive to thermal compensation, the cold refractive index profile is modified, through addition of a thermal index profile, to form a hot index profile having attributes including good overlap of the fundamental mode with the gain profile and mode clean-up through gain discrimination against higher order modes.

OPTICAL SYSTEM ELEMENT, FOR RECEIVING A PRESSURISED FUNCTIONAL FLUID

An optical system element includes a first enclosure designed for receiving in circulation a functional fluid and at least one inlet and/or outlet window located on the first enclosure and through which a light beam can pass. The inlet and/or outlet window includes two viewports which delimit a spacer cavity adjacent to the first enclosure. The spacer cavity is designed to receive a second fluid with a predetermined optical index and is equipped with a device for adjusting the pressure therein. Degradation of a beam during its passage through the inlet and/or outlet window can be limited by careful selection of the optical index of the second fluid and the pressure in the spacer cavity. 1. An element of an optical system including:a first enclosure for receiving in circulation a functional fluid andat least one inlet and/or outlet window located on the first enclosure, and configured to allow a light beam to pass into and/or out of the first enclosure;wherein:the inlet and/or outlet window includes two viewports which laterally delimit a spacer cavity adjacent to the first enclosure,said spacer cavity is configured for receiving a second fluid, having a predetermined optical index, and is provided with a pressure adjusting device therewithin,the second fluid has an optical index substantially equal to that of one of the functional fluid and a ambient medium surrounding said element, within plus or minus 10%, andthe pressure adjusting device is adapted for the pressure within the spacer cavity to be substantially equal to a pressure of the other of the functional fluid in the first enclosure and the ambient medium, within plus or minus 10%.2. The element according to claim 1 , wherein a mean thickness of the viewport located on a side of the first enclosure is smaller than a mean thickness of the viewport located on a side opposite to the first enclosure.3. The element according to claim 1 , wherein:the second fluid has an optical index substantially equal to that of ...

SLAB LASER AND AMPLIFIER

A laser for high power applications. The laser is a lamp driven slab design with a face to face beam propagation scheme and an end reflection that redirects the amplified radiation back out the same input surface. Also presented is a side to side larger amplifier configuration, permitting very high average and peak powers due to the electrical efficiency of absorbing energy into the crystal, optical extraction efficiency, and scalability of device architecture. Cavity filters adjacent to pump lamps convert the unusable UV portion of the pump lamp spectrum into light in the absorption band of the slab laser thereby increasing the overall pump efficiency. The angle of the end reflecting surface is changed to cause the exit beam to be at a different angle than the inlet beam, thereby eliminating the costly need to separate the beams external to the laser with the subsequent loss of power. 1. A laser device comprising:a pump light source arranged to emit light energy in both a first frequency band and a second frequency band;a slab crystal formed into a polygon having at least two parallel sides such that at least one of said parallel sides is flat; anda cavity filter component having a flat side provided adjacent to the at least one flat side of the slab crystal, said cavity filter component being arranged to receive light energy emitted from the pump light source such that the cavity filter component converts light energy received from the pump light source at the first frequency band into light energy substantially within the second frequency band, and wherein said cavity filter component is transparent to light energy emitted from the pump light source at the second frequency band for transmission through the filter component to the at least one flat side of the slab crystal, whereinthe slab crystal is configured to absorb the light energy at the second frequency band received from and through the cavity filter component for emitting a laser beam from the slab ...

VAPOR CYCLE COOLING SYSTEM FOR HIGH POWERED DEVICES

A vapor-compression system includes a centrifugal compressor configured to increase a pressure of a refrigerant based on at least one of an activation of a device or the device being equal to or above a first threshold temperature. A fluid communication system is configured to provide, to the device, a portion of the refrigerant in a liquid state. The portion of the liquid refrigerant in a liquid state is configured to have a saturation temperature equal to or below the first temperature threshold. 1. A vapor-compression system comprising:a centrifugal compressor configured to increase a pressure of a refrigerant based on at least one of an activation of a device or the device being equal to or above a first threshold temperature; anda fluid communication system configured to provide, to the device, a portion of the refrigerant in a liquid state, wherein the portion of the liquid refrigerant in a liquid state is configured to have a saturation temperature equal to or below the first temperature threshold.2. The vapor-compression system of claim 1 , wherein the centrifugal compressor is further configured to shut off based on at least one of the device being deactivated or the device being equal to or below a second threshold temperature.3. The vapor-compression system of claim 1 , wherein the device comprises a directed energy device.4. The vapor-compression system of claim 1 , wherein the device is configured to output an amount of heat that is greater than a cooling capacity of the vapor-compression system when activated claim 1 ,wherein the device is configured to output an amount of heat that is less than the cooling capacity of the vapor-compression system when deactivated.5. The vapor-compression system of claim 4 , wherein the capacity of the vapor-compression system is equal to or less than 15 kilowatts.6. The vapor-compression system of claim 2 , wherein the fluid communication system is further configured to provide liquid refrigerant below the second ...

End pumped pwg with tapered core thickness

A planar wave guide (PWG) having a first end for coupling to a light pump and a second end opposite to the first end and including a first cladding layer; a second cladding layer; and a uniformly doped core layer between the first cladding layer and the second cladding layer, wherein the core layer is tapered having a smaller thickness at the first end and a larger thickness at the second end, and wherein a ratio of the core thickness to thickness of the cladding layers is smaller at the first end and larger at the second end.

LASER APPARATUS AND EUV LIGHT GENERATION SYSTEM

A laser apparatus includes: a plurality of envelope blocks each provided with an optical element and a first temperature sensor and covering part of a laser beam path, the optical element being disposed on the laser beam path, the first temperature sensor being configured to measure a first temperature of gas at a position away from the optical element; an envelope body including the envelope blocks and covering the laser beam path; and a control unit connected with each first temperature sensor and configured to specify an envelope block at which increase of the first temperature is measured in the envelope body as an envelope block at which anomaly is occurring. 1. A laser apparatus comprising:a plurality of envelope blocks each provided with an optical element and a first temperature sensor and covering part of a laser beam path, the optical element being disposed on the laser beam path, the first temperature sensor being configured to measure a first temperature of gas at a position away from the optical element;an envelope body including the envelope blocks and covering the laser beam path; anda control unit connected with each first temperature sensor and configured to specify an envelope block at which increase of the first temperature is measured in the envelope body as an envelope block at which anomaly is occurring.2. The laser apparatus according to claim 1 , wherein the control unit determines that anomaly is occurring at an envelope block including a first temperature sensor having measured the first temperature to be equal to or higher than a predetermined threshold in the envelope body.3. The laser apparatus according to claim 1 , wherein the control unit determines that anomaly is occurring at an envelope block including a first temperature sensor having measured the change rate of the first temperature to be equal to or larger than a predetermined threshold in the envelope body.4. The laser apparatus according to claim 1 , whereinthe gas includes ...

KIND OF ALL-SOLID-STATE HIGH-POWER SLAB LASER BASED ON PHONON BAND-EDGE EMISSION

A kind of all-solid-state high-power slab laser based on phonon band-edge emission, which is comprised of a pumping source, a focusing system, a resonant cavity and a self-frequency-doubling crystal; the said self-frequency-doubling crystal is a Yb-doped RECOB crystal cut into slab shape along the direction of the crystal's maximum effective nonlinear coefficient of its non-principal plane; by changing the cutting direction of the crystal, the phase matching of different wavelengths is realized, thus realizing laser output at the band of 560-600 nm; the said pumping source is a diode laser matrix with a wavelength of 880 nm-980 nm; the input cavity mirror and the output cavity mirror are coated with films to obtain laser output at the band of 560-600 nm; the two large faces of the said self-frequency-doubling crystal is cooled by heat sink and located between the input cavity mirror and the output cavity mirror. 1. An all-solid-state high-power slab laser based on phonon band-edge emission , which is comprised of a pumping source , a focusing system , a resonant cavity and a self-frequency-doubling crystal in the resonant cavity; in which the said pumping source , focusing system and resonant cavity are successively arranged along the optical path , and the said resonant cavity is located at the output end of the said focusing system; in which the said self-frequency-doubling crystal is a Yb-doped RECOB crystal;the resonant cavity is comprised of an input cavity mirror and an output cavity mirror, in which the said input cavity mirror and the output cavity mirror are respectively coated with a dielectric film, to suppress the starting laser oscillation at the band of 1020-1080 nm and realize the starting laser oscillation at the band of 1120-1200 nm; which is characterized in that:the said self-frequency-doubling crystal is cut into slab shape along the direction of the crystal's maximum effective nonlinear coefficient;the said pumping source is a diode laser matrix ...

HIGH-ORDER HARMONIC WAVE GENERATION APPARATUS CAPABLE OF SELECTING WAVELENGTH

A high-order harmonic wave generation apparatus using a diode-pumped solid state laser includes a pump head for generating a fundamental wave, Porro prisms disposed on the left and right sides of the pump head, nonlinear crystals for sequentially generating a second-order harmonic wave, a fourth-order harmonic wave, and a fifth-order harmonic wave from the fundamental wave, and a final emission unit for reflecting and transmitting any one of the second-order harmonic wave, the fourth-order harmonic wave, and the fifth-order harmonic wave and for emitting the harmonic wave without changing the optical path. Accordingly, the apparatus is insensitive to changes in the external environment through a resonator having a structure comprising Porro prisms, and enables the final emission unit to selectively output the fourth-order harmonic wave or the fifth-order harmonic wave. 1. A high-order harmonic wave generation apparatus for selecting a wavelength , comprising:Porro prisms, arranged on a left side and a right side of a pump head in order to make a fundamental wave, generated by the pump head, insensitive to a change in an external environment;nonlinear crystals for sequentially generating a second-order harmonic wave, a fourth-order harmonic wave, and a fifth-order harmonic wave from the fundamental wave; anda final emission units for reflecting and transmitting any one of the second-order harmonic wave, the fourth-order harmonic wave, and the fifth-order harmonic wave and for emitting a harmonic wave without changing an optical path.2. The high-order harmonic wave generation apparatus of claim 1 , wherein the emitted harmonic wave has an output wavelength that is equal to or less than 300 nm.3. The high-order harmonic wave generation apparatus of claim 1 , wherein the pump head comprises a laser diode array and a gain medium.4. The high-order harmonic wave generation apparatus of claim 1 , wherein the nonlinear crystals are any one of Beta-Barium Borate claim 1 , ...

AIR-COOLED LASER DEVICE

Air-cooled laser devices and formation methods are provided. An exemplary air-cooled laser device can include at least a laser active slab, a first silicon carbide clad, a second silicon carbide clad, a first laser diode array, and a first cylindrical lens. The first and second silicon carbide clads can be symmetrically bonded to the laser active slab and can have a surface area greater than the laser active slab to form an air duct surrounding side surfaces of the laser active slab and between the silicon carbide clads. The first laser diode array can emit first input pump laser beams to be collimated by the first cylindrical lens to provide parallel and quasi-parallel pump laser beams that are guided by the air duct to enter into the laser active slab from at least a first side surface of the laser active slab. 1. An air-cooled laser device comprising:a first silicon carbide clad, bonded to a first surface of a laser active slab; wherein the first silicon carbide clad and the second silicon carbide clad are symmetrically configured and centered by the laser active slab,', 'wherein each of the first and the second silicon carbide clads has a surface area greater than a surface area of the first or the second surface of the laser active slab to form an air channel surrounding the side surfaces of the laser active slab and between the first and the second silicon carbide clads, and', 'wherein the laser active slab has a thickness to determine a thickness of the air channel for the air channel to form an air duct; and, 'a second silicon carbide clad, bonded to a second surface of the laser active slab opposing the first surface, the laser active slab further including side surfaces between the first surface and the second surface,'}a first laser diode array and a first cylindrical lens, configured such that the first laser diode array emits first input pump laser beams to be collimated by the first cylindrical lens to provide parallel pump laser beams and quasi- ...

SOLID-STATE POWER AMPLIFIERS WITH COOLING CAPABILITIES

Methods and apparatus for processing a substrate. For example, a processing chamber can include a power source, an amplifier connected to the power source, comprising at least one of a gallium nitride (GaN) transistor or a gallium arsenide (GaAs) transistor, and configured to amplify a power level of an input signal received from the power source to heat a substrate in a process volume, and a cooling plate configured to receive a coolant to cool the amplifier during operation. 1. A processing chamber , comprising:a power source;an amplifier connected to the power source, comprising at least one of a gallium nitride (GaN) transistor or a gallium arsenide (GaAs) transistor, and configured to amplify a power level of an input signal received from the power source to heat a substrate in a process volume; anda cooling plate configured to receive a coolant to cool the amplifier during operation.2. The processing chamber of claim 1 , wherein the processing chamber is a degas process chamber.3. The processing chamber of claim 1 , wherein the amplifier is a solid-state power amplifier (SSPA) that provides power from about 800 W to about 1000 W.4. The processing chamber of claim 1 , wherein the power source is configured to provide power at a frequency from about 5.0 GHz to about 7.0 GHz.5. The processing chamber of claim 1 , wherein the amplifier comprises at least one of power dividers or power combiners.6. The processing chamber of claim 1 , wherein the coolant is chilled water.7. The processing chamber of claim 1 , wherein the cooling plate includes a plurality of cooling channels configured to allow the coolant to flow within the cooling plate.8. The processing chamber of claim 7 , further comprising a controller in communication with the amplifier and configured to control a flow of the coolant through the plurality of cooling channels.9. The processing chamber of claim 1 , wherein the cooling plate is disposed under the amplifier.10. A method for processing a substrate ...

LASER OSCILLATOR PROVIDED WITH LASER MEDIUM FLOW PATH

A laser oscillator which can keep distributions of pressure of a laser medium inside of a plurality of discharge tubes constant while making the laser medium circulate without stagnating. The laser oscillator is comprised of a first discharge tube, second discharge tube, first light guide, laser medium flow path, and blower. A flow resistance of a laser medium flow path between the blower and the first discharge tube and a flow resistance of the laser medium flow path between the blower and second discharge tube are the same as each other. A flow resistance of the laser medium flow path between the blower and a first end of the first light guide and a flow resistance of the laser medium flow path between the blower and a second end of the first light guide differ from each other. 1. A laser oscillator comprising:a first discharge tube and a second discharge tube;a first light guide arranged between a first end of the first discharge tube and a first end of the second discharge tube;a laser medium flow path which is in fluid communication with each of the first discharge tube, the second discharge tube, and the first light guide; anda blower arranged in the laser medium flow path so as to circulate a laser medium to the laser medium flow path, the first discharge tube, and the second discharge tube, whereina flow resistance of the laser medium flow path between a discharge opening of the blower and the first end of the first discharge tube is equal to a flow resistance of the laser medium flow path between the discharge opening and the first end of the second discharge tube,a flow resistance of the laser medium flow path between an intake opening of the blower and a second end of the first discharge tube opposite the first end of the first discharge tube is equal to a flow resistance of the laser medium flow path between the intake opening and a second end of the second discharge tube opposite the first end of the second discharge tube, anda flow resistance of the ...

HIGH POWER CW MID-IR LASER

The present invention provides a rotating chalcogenide gain media ring to provide un-precedented power generation with minimal thermal lensing for CW lasing in the mid-IR spectrum. 1. A continuous wave (“CW”) mid-IR laser comprising:a resonant cavity;a gain medium selected from polycrystalline transition metal doped II-VI materials (“TM:II-VI), the gain medium being formed into a ring defined by an inner and outer circumference and upstream and downstream faces with a portion of the upstream and downstream faces being positioned within the resonant cavity;a pump source; anda motor to which the ring is mounted; and whereby the portion of the ring being in the resonant cavity receives pump light sufficient to emit a CW laser beam at a wavelength in the mid-IR spectrum.2. The CW laser of claim 1 , wherein a face of the gain medium further comprises a reflective coating fixed thereto.3. The CW laser of claim 1 , wherein the gain medium is characterized as of Cr:ZnSe.4. The CW laser of claim 1 , wherein the gain medium is characterized as of Cr:ZnS.5. The CW laser of further comprising a foil positioned on a circumference.6. The CW laser of claim 5 , wherein the foil includes Indium.7. The CW laser of further comprising a heat sink positioned on a circumference.8. The CW laser of further comprising foil and heatsinks juxtaposed on the internal and external circumferences of the gain medium.9. The CW laser of further comprising a radiator positioned with respect to a heat sink to facilitate heat removal therefrom. This disclosure relates to continuous wave (CW) mid-IR solid state lasers. Particularly, the present invention provides a rotating disk and more preferably a ring comprised of chalcogenide gain media selected from II-VI group of polycrystalline materials doped with transition metal ions to provide un-precedented power generation with minimal thermal lensing.Middle-infrared (mid-IR) laser sources operating in the 2-10 μm spectral range are in great demand for a ...

ENHANCED WAVEGUIDE SURFACE IN GAS LASERS

A laser may comprise a ceramic core that at least partially defines a waveguide slab laser cavity. An interior surface of the waveguide slab laser cavity is coated with a layer of metal. The laser also includes a set of mirrors that form a resonator in the waveguide slab laser cavity. The laser also includes electrodes positioned such that the laser gas contained in the waveguide slab laser cavity is excited when an excitation signal is applied to the electrodes. In other embodiments, the core may be formed from a material other than ceramic. Additionally or alternatively, the layer may be formed from a material other than metal. 1. A laser comprising:a ceramic core defining an airtight enclosure containing a laser gas and defining a waveguide slab laser cavity, wherein an interior surface of the waveguide slab laser cavity is coated with a layer of metal;a plurality of mirrors forming a resonator in the waveguide slab laser cavity; anda plurality of electrodes positioned outside the airtight dielectric enclosure such that the laser gas contained in the waveguide slab laser cavity is excited when an excitation signal is applied to the plurality of electrodes.2. The laser of claim 1 , wherein the metal is gold.3. The laser of claim 1 , wherein the metal is silver claim 1 , copper claim 1 , nickel claim 1 , or platinum.4. The laser of claim 1 , wherein the layer has a thickness that is less than a micrometer.5. The laser of claim 1 , wherein the layer has a thickness that is more than a hundred micrometers.6. The laser of claim 1 , wherein the layer is discontinuous.7. The laser of claim 6 , wherein the layer is formed from a set of stripes of the metal across the interior surface.8. The laser of claim 1 , wherein the layer is formed from sputtering deposits of the metal on the interior surface.9. The laser of claim 1 , wherein the layer has a greater optical reflectivity than ceramic.10. The laser of claim 1 , wherein the layer is smoother than ceramic.11. The laser ...

THERMAL MANAGEMENT SYSTEMS

A thermal management system for removing excess heat from a heat source includes a condenser and an evaporator fluidly connected together within a cooling loop. A phase change material is positioned within the condenser. The phase change material is configured to melt with a liquid coolant warmed by the evaporator. The phase change material is also configured solidify with the liquid coolant cooled by the condenser to temperatures below the melting point. 1. A thermal management system for removing excess heat from a heat source , comprising:a condenser and an evaporator fluidly connected together within a cooling loop; and melt with liquid coolant warmed by the evaporator; and', 'solidify with the liquid coolant when cooled by the condenser to temperatures below melting., 'a phase change material within the condenser, wherein the phase change material is configured to2. The system of claim 1 , wherein the phase change material is within a tapered section of the condenser.3. The system of claim 1 , wherein the condenser is tapered down in the direction of flow with the liquid coolant cooling a heat source.4. The system of claim 1 , wherein the condenser and evaporator are arranged within the cooling system to generate a one to one ratio of pressure and temperature drop.5. The system of claim 1 , wherein the phase change material includes wax.6. The system of claim 1 , wherein material of the phase change material has a melting point near the desired operating temperature of a heat source.7. The system of claim 1 , wherein during a heat storage phase a boiling temperature of the liquid coolant is greater than a melting temperature of the phase change material causing the phase change material to melt and absorb heat from the evaporator.8. The system of claim 1 , wherein during a heat recovery phase a cooling temperature of the liquid coolant is less than a melting temperature of the phase change material causing the phase change material to transfer from a melted ...

HIGH EFFICIENCY AMPLIFICATION OF PULSED LASER OUTPUT FOR HIGH ENERGY ULTRAFAST LASER SYSTEMS

Systems and methods of high efficiency amplification of pulsed laser output for high energy ultra-short pulse laser systems are provided herein. According to some embodiments, methods for amplifying pulsed laser output for high energy ultra-short pulse laser systems include receiving pulsed laser output and amplifying the pulsed laser output by propagating the pulsed laser output through a non-silica based gain medium that has been doped with a concentration of rare earth ions, wherein the concentration of the rare earth ions within the gain medium is approximately greater than one percent by weight. 1. A method for amplifying laser pulses for ultra-short pulse laser output , the method comprising:receiving laser pulses for ultra-short pulse laser output; andamplifying the laser pulses for ultra-short pulse laser output by propagating the laser pulses through a non-silica based gain medium that has been doped with a concentration of a rare earth ions, wherein the concentration of the rare earth ions within the gain medium is approximately greater than one percent by weight.2. The method according to claim 1 , further comprising propagating the laser pulses through a high order mode passive medium before and during amplification.3. The method according to claim 1 , further comprising phase tailoring the laser pulses to reduce self-phase modulation of the pulsed laser output during propagation of the same through the gain medium.4. The method according to claim 3 , wherein phase tailoring includes at least one of active phase and amplitude shaping of the laser pulses for ultra-short pulse laser output.5. The method according to claim 1 , wherein the input to the high efficiency medium amplifier includes a multiplexed combination of a signal and one or more pumplaser beams.6. The method according to claim 5 , wherein the input to the high efficiency medium amplifier includes a pulsed signal laser output and a pump laser output that have wavelengths in tandem with one ...

On-demand laser marking device manufacturing method and laser marking device obtained by said method

On-demand laser marking device manufacturing method and laser marking device obtained by said method Method of producing equipment for marking products by laser, comprising the steps of: having at least one base plate; having various types of modules in which equipment components are grouped; having casings, rear covers and front covers that can be attached to said base plate; selecting modules from each of the different module types; removably attaching the selected modules to the base plate; attaching the casing, rear cover and front cover to the base plate.

HIGH-POWER LIQUID-COOLED PUMP AND SIGNAL COMBINER

Embodiments of the present invention are generally related to a high-power liquid-cooled pump and signal combiner and methods thereof for fiber optic applications. More specifically, embodiments of the present invention relate to a pump and signal combiner capable of conveying several kilowatts of pump laser power for kilowatt class rare-earth doped fiber amplifiers without suffering thermal damage. In one embodiment of the present invention, a high-power, heat dissipating optical fiber device comprises a section of optical fiber configured to propagate light, a cooling chamber, substantially encapsulating the optical fiber, and a fluid within the cooling chamber having a refractive index selected to control the interaction and propagation of the light in the fluid. 1. A high-power , heat dissipating optical fiber device comprising:a section of optical fiber configured to propagate light;a cooling chamber, substantially encapsulating the optical fiber; anda heat-dissipating fluid within the cooling chamber having a refractive index selected to control the interaction and propagation of the light in the fluid.2. The device of claim 1 , wherein the refractive index of the fluid is selected to strip the propagating light exceeding a predetermined numerical aperture.3. The device of claim 2 , wherein the predetermined numerical aperture is substantially similar to that supported by the coated fiber.4. The device of claim 1 , wherein the refractive index is substantially similar to or greater than a refractive index of an outer surface of the optical fiber.5. The device of claim 1 , wherein the refractive index is substantially similar to or less than a refractive index of an outer surface of an outer coating of the optical fiber that is in contact with the fluid.6. The device of claim 1 , wherein the optical fiber comprises a stripped section of a coated fiber claim 1 , and wherein the refractive index of the fluid is less than that of the outer surface of the bare ...

Graphene illuminator, and heat dissipating apparatus and optical transmission network node using the graphene illuminator

A graphene illuminator includes two electrodes, an accelerating electric field power supply, and several magnet sets, and further includes a graphene material used for providing free-electrons. The two electrodes are respectively disposed on both sides or at both ends of the graphene material, and meanwhile are both disposed on a plane where the graphene material is disposed; a positive electrode and a negative electrode of the accelerating electric field power supply are respectively connected to the two electrodes, to apply, in a first direction, an accelerating electric field to the graphene material; and the magnet sets are disposed on upper and lower sides of the plane where the graphene material is disposed, to generate a magnetic field perpendicular to the plane where the graphene material is disposed, and South poles and North poles of the magnet sets are arranged alternately to generate an alternating magnetic field in a second direction.

SPACE-BASED SODIUM LIDAR INSTRUMENT AND METHOD OF OPERATION

The present invention relates an apparatus and method for measuring range-resolved atmospheric sodium temperature profiles using a space-based Lidar instrument, including a diode-pumped Q-switched self-Raman c-cut Nd:YVOlaser with intra-cavity frequency doubling that could produce multi-watt 589 nm wavelength output. The c-cut Nd:YVOlaser has a fundamental wavelength that is tunable from 1063-1067 nm. A continuous wave narrow linewidth diode laser is used as an injection seeder to provide single-frequency grating tunable output around 1066 nm. The injection-seeded self-Raman shifted Nd:VOlaser is tuned across the sodium vapor Dline at 589 nm. In one embodiment, a space-qualified frequency-doubled 9 Watt at 532 nm wavelength Nd:YVOlaser, is utilized with a tandem interference filter temperature-stabilized fused-silica-etalon receiver and high-bandwidth photon-counting detectors. 1. A Lidar instrument comprising: [{'sub': '4', 'a continuous wave diode laser which emits laser beams at a predetermined wavelength, through mode matching lenses and a high reflective mirror to pump a c-cut Nd:YVOcrystal;'}, {'sub': '4', 'a tunable seed continuous wave diode laser which emits laser beams through a plurality of mode matching lenses, said laser beams which are redirected by a beam splitter to said c-cut Nd:YVOcrystal, and which tunes said continuous wave diode laser to produce light at a wavelength of 1066 nm;'}, {'sub': '4', 'wherein said tunable laser light after passing through said c-cut Nd:YVOcrystal self-Raman shifts to 1178 nm;'}, {'sub': '2', 'wherein said continuous wave diode laser and said tunable seed continuous wave diode laser produce tunable laser light across the sodium Dabsorption line; and'}, {'sub': '4', 'wherein said c-cut Nd:YVOcrystal is a zig-zag crystal which supports multiple total internal reflections of optical wave propagation therethrough, and increases an optical path length greater than a physical dimension of said zig-zag crystal.'}], 'a laser ...

METHOD AND SYSTEM FOR COMPACT EFFICIENT LASER ARCHITECTURE

A laser amplifier module having an enclosure includes an input window, a mirror optically coupled to the input window and disposed in a first plane, and a first amplifier head disposed along an optical amplification path adjacent a first end of the enclosure. The laser amplifier module also includes a second amplifier head disposed along the optical amplification path adjacent a second end of the enclosure and a cavity mirror disposed along the optical amplification path. 111-. (canceled)12. A method of amplifying a laser beam , the method comprising:receiving an input beam;directing the input beam along a first direction;amplifying the input beam a first time using a set of amplifiers, wherein amplification paths through the set of amplifiers are disposed along a second direction substantially orthogonal to the first direction;reflecting the amplified beam using a first cavity mirror;amplifying the amplified beam a second time using the set of amplifiers;image relaying the twice amplified beam along the first direction;reflecting the twice amplified beam using a second cavity mirror;amplifying the twice amplified beam a third time using the set of amplifiers;reflecting the three times amplified beam using the first cavity mirror;amplifying the three times amplified beam using the set of amplifiers; andoutputting the four times amplified beam.13. The method of wherein the input beam and the four times amplified beam are characterized by a linear polarization.14. The method of wherein the amplified beam claim 13 , the twice amplified beam claim 13 , and the three times amplified beam are characterized by circular polarization.15. The method of further comprising rotating a polarization state of the twice amplified beam using a Pockels cell.16. The method of wherein the first cavity mirror comprises a deformable mirror.17. The method of further comprising performing image relaying between the set of amplifiers.18. The method of further comprising amplifying the three ...

LASER COOLING SYSTEM

A laser cooling system includes a first tubing, a second tubing, and a cold plate assembly including a first channel to receive the first tubing and a second channel to receive the second tubing. A joint removably couples the first tubing to the second tubing and at least one component mounted on the cold plate assembly over the first tubing or the second tubing. The inlet end of the first tubing receives a cooling fluid and an outlet end of the second tubing discharges the cooling fluid after the cooling fluid flows through the first tubing, the joint, and the second tubing to maintain uniform a temperature of the at least one component mounted on the cold plate assembly. 1. A system , comprising:a first plate having a first channel boustrophedonically formed thereon;a second plate having a second channel boustrophedonically formed thereon;a first tubing received by the first channel of the first plate;a second tubing received by the second channel of the second plate; anda joint to couple the first tubing to the second tubing.2. The system of claim 1 ,wherein the first tubing includes an inlet end to receive a cooling fluid; andwherein the second tubing includes an outlet end to discharge the cooling fluid.3. The system of claim 2 , further comprising:first components mounted on the first plate over the first tubing; andsecond components mounted on the second plate over the second tubing;wherein the cooling fluid is configured to flow through the first tubing, the joint, and the second tubing to maintain uniform a temperature of the first components or the second components.4. The system of claim 3 ,wherein the first components or the second components includes a pump diode or a laser diode driver.5. The system of claim 2 ,wherein thermal crosstalk between the first plate and the second plate maintains substantially uniform a temperature of the first components and the second components.6. The system of claim 2 ,wherein the first tubing is pressed into the first ...

LASER APPARATUS HAVING TEMPERATURE CONTROL FUNCTION FOR MAINTENANCE WORK

A laser apparatus able to prevent the formation of condensation at the time of maintenance work. The laser apparatus includes a housing having an openable sealed structure, an optical system set inside the housing, a temperature regulation mechanism maintaining the optical system at a predetermined temperature, and a preparatory step controller controlling a preparatory step performed before opening the housing. The temperature regulation mechanism is configured to maintain the optical system at a first temperature during operation of the laser apparatus and to maintain the optical system at a second temperature of the first temperature or more when the preparatory step is started. 1. A laser apparatus comprising:a housing having an openable sealed structure,an optical system set inside the housing,a temperature regulation mechanism maintaining the optical system at a predetermined temperature, anda preparatory step controller controlling a preparatory step performed before opening the housing,the temperature regulation mechanism being configured to maintain the optical system at a first temperature during operation of the laser apparatus and to maintain the optical system at a second temperature of the first temperature or more when the preparatory step is started.2. The laser apparatus according to further comprisinga first temperature acquiring part acquiring an outside air temperature anda temperature calculating part using the outside air temperature as the basis to calculate the second temperature.3. The laser apparatus according to claim 2 , wherein the temperature calculating part is configured to calculate the second temperature so that the second temperature becomes the outside air temperature or more.4. The laser apparatus according to claim 1 , further comprising:a dew point temperature acquiring part acquiring a dew point temperature of the outside air anda temperature calculating part using the dew point temperature as the basis to calculate the second ...

Pump energy wavelength stabilization

In a method of stabilizing pump energy, a gain medium is provided having an absorption coefficient that varies with wavelength. An absorption coefficient curve of the absorption coefficient or a range of wavelengths comprises peaks and valleys. Pump energy is generated at an operating wavelength within one of the valleys, at which the absorption coefficient is approximately at a minimum. The pump energy is transmitted through the gain medium. A portion of the pump energy is absorbed with the gain medium and laser light is emitted from the gain medium responsive to the absorbed pump energy. The non-absorbed pump energy (feedback pump energy) is fed back to the pump module. The operating wavelength of the pump energy is stabilized using the feedback pump energy.

Resonant Cavity Conditioning For Improved Nonlinear Crystal Performance

Systems and methods to improve the performance of nonlinear crystals in a resonant cavity are presented. A humidified purge gas is supplied to a resonant cavity of a laser based illumination source that includes a nonlinear crystal. A small amount of water vapor is added to a clean, dry purge gas to prevent excessive drying of the nonlinear crystal during storage or operation. In some embodiments, a humidity injection system includes at least two parallel flow paths. One flow path includes a humidity injector and another does not include humidity injection. The amount of water vapor added to the purge gas flow is determined at least in part by the relative flow rate between the parallel flow paths. In some embodiments, the amount of water vapor added to the purge gas flow is regulated based on a measurement of humidity in the resonant cavity.

Ruggedized Fiber Optic Laser for High Stress Environments

A fiber optic laser for use in high stress environments is provided. The fiber optic laser comprises a hollow spool structure housing a fiber in a spiral groove in an interior surface of said hollow spool structure, wherein the fiber is mechanically supported along an entirety of its length within the hollow spool structure. Fluid channels are formed within the hollow spool structure, wherein a quantity of coolant is movable through the fluid channels to provide high-precision thermal management of the fiber.

Optical Amplifier and Optical Transmission System

An optical amplifying apparatus that amplifies an optical signal, including an input section whereto the optical signal is inputted, a laser light source that generates laser light, the laser light source including an uncooled semiconductor laser device, an optical fiber that amplifies the optical signal by a stimulated emission based on the laser light from the laser light source, an output section that outputs the optical signal amplified by the optical fiber, and a passive optical component disposed between the optical fiber and the output section. The laser light source is thermally coupled to the optical fiber and/or the passive optical component via a thermally conductive medium. An oscillating wavelength of the laser light source is varied by increasing a temperature of the laser light source with heat generated by the optical fiber and/or the passive optical component. 1. An optical amplifying apparatus that amplifies an optical signal , comprising:an input section whereto the optical signal is inputted;a laser light source that generates multimode laser light propagating in a multimode, the laser light source including a multimode semiconductor laser device with no electronic cooling element;a double-clad optical fiber that amplifies the optical signal by a stimulated emission based on the multimode laser light from the laser light source;an output section that outputs the optical signal amplified by the double-clad optical fiber;a passive optical component disposed between the double-clad optical fiber and the output section; anda thermally conductive medium,the double-clad optical fiber being mounted on the thermally conductive medium, the double-clad optical fiber being configured to heat the thermally conductive medium by propagation of the multimode laser light,the laser light source being mounted on the thermally conductive medium so as to be heated by the double-clad optical fiber via the thermally conductive medium,an oscillating wavelength of the ...

SLAB LASER AND AMPLIFIER AND METHOD OF USE

A slab laser and its method of use for high power applications including the manufacture of semiconductors and deposition of diamond and/or diamond-like-carbon layers, among other materials. A lamp driven slab design with a face-to-face beam propagation scheme and an end reflection that redirects the amplified radiation back out the same input surface is utilized. A side-to-side amplifier configuration permitting very high average and peak powers having scalability is also disclosed. Cavity filters adjacent to pump lamps convert the normally unusable UV portion of the pump lamp spectrum into light in the absorption band of the slab laser, thereby increasing the overall pump efficiency. The angle of the end reflecting surface is changed to cause the exit beam to be at a different angle than the inlet beam, thereby eliminating the costly need to separate the beams external to the laser with the subsequent loss of power. 1. A laser device comprising:a pump light source comprising one or more lamps configured to emit light; anda crystal having at least a front face and back face each configured to reflect a laser beam internally within said crystal, said crystal being configured to absorb energy obtained from said emitted light, whereinthe crystal is configured to receive an input laser beam in the front face of the crystal, with the crystal configured such that the input laser beam passes through the crystal at least four times while being amplified by the crystal using said received light energy, and whereinthe input laser beam is thereby converted by the crystal into an amplified laser beam emitted from the crystal.2. The device of claim 1 , wherein the crystal is configured such that the amplified laser beam is emitted from the front face of the crystal at some angle or distance from the input light beam.3. A system comprising a plurality of the laser devices of formed into a string of light amplifiers such that a laser beam output of a previous one of the laser ...

Wavelength discriminating slab laser

A CO 2 laser that generates laser-radiation in just one emission band of a CO 2 gas-mixture has resonator mirrors that form an unstable resonator and at least one spectrally-selective element located on the optical axis of the resonator. The spectrally-selective element may be in the form of one or more protruding or recessed surfaces. Spectral-selectivity is enhanced by forming a stable resonator along the optical axis that includes the spectrally-selective element. The CO 2 laser is tunable between emission bands by translating the spectrally-selective element along the optical axis.

APPARATUS FOR INTERROGATING DISTRIBUTED OPTICAL FIBRE SENSORS USING A STIMULATED BRILLOUIN SCATTERING OPTICAL FREQUENCY-DOMAIN INTERFEROMETER

Apparatus for producing and sourcing two lightwaves having a wavelength-shift known and controllable and suitable to be used as “pump” and “probe” in a stimulated Brillouin analyser in which part of the radiation of frequency ffrom a primary source () is first shifted of a frequency Δftypically from 200 to 1000 MHz lower than the Brillouin shift Δfin the sensor, by a first frequency conversion system comprising a Brillouin ring laser () and then is shifted of a frequency Δfin order to fall inside the Brillouin gain band of the sensor through a further tuneable frequency conversion system () in which at least one electro-optical modulator generates modulation side bands () of frequency (f−Δf+Δf) and (f<Δf−Δf), only one of which can fall within a Brillouin gain band of the sensor. The apparatus possibly comprises also a feedback stabilization system that acts on Δfdepending on changes in the value of Δfin order to stabilise at least one between |Δf+Δf| and |Δf−Δf|. The apparatus solves the following problems of known solutions: wavelength-shift stability and accuracy, wavelength agility, width of the wavelength-shift tuning range, power consumption, tuning speed and industrial cost. 1. An apparatus for producing and sourcing , through multiple frequency conversions , at least two optical radiations suitable to be used in a Brillouin analyser , characterized by the facts of comprising:{'b': '70', 'at least one source () of primary radiation with frequency f0 and linewidth not greater than the Brillouin gain bandwidth GBWB,BGM in a Brillouin gain medium and possibly than that GBWB,SNS in a sensing medium; and'}{'b': 72', '102', '74', '105', '70, 'claim-text': 'fB,SNS characteristic of the sensor at least twice the width of the Brillouin gain bandwidth GBWB,SNS of the sensor; and', 'at least one first stimulated Brillouin frequency conversion system (,) using a special Brillouin Gain Medium BGM (, ) characterized by doping in Germanium and/or other substances and/or a ...

LASER ARRAY DEVICE

A laser array device includes a first lens tube () through which a first laser beam () passes, a second lens tube () through which a second laser beam () passes, a support mechanism () disposed to support the first lens tube () and the second lens tube to be parallel to each other, a first lens () arranged in the first lens tube (), and a second lens () arranged in the second lens tube (). A first temperature-rise suppressing mechanism () is disposed in the first lens tube () to suppress temperature rise of the first lens tube (). 115-. (canceled)16. A laser array device comprising:a plurality of lens tubes comprising a first lens tube through which a first laser beam passes and a second lens tube through which a second laser beam passes;a support mechanism disposed to support the plurality of lens tubes such that the plurality of lens tubes are parallel to each other;a plurality of first lenses arranged in the first lens tube;a plurality of second lenses arranged in the second lens tube; anda first temperature-rise suppressing mechanism disposed in the first lens tube to suppress temperature rise of the first lens tube,wherein the plurality of first lenses comprises an incident-side lens arranged on a laser beam incident-side and an emitting-side lens arranged on a laser beam emitting side, andwherein the plurality of second lenses comprises an incident-side lens arranged on a laser beam incident-side and an emitting-side lens arranged on a laser beam emitting side.17. The laser array device according to claim 16 , further comprising:a second temperature-rise suppressing mechanism disposed in the second lens tube to suppress temperature rise of the second lens tube.18. The laser array device according to claim 17 , wherein the first temperature-rise suppressing mechanism comprises a temperature-rise suppressing mechanism of a type different from the second temperature-rise suppressing mechanism.19. The laser array device according to claim 16 , wherein the first ...

LASER OSCILLATOR COMPRISING HEAT EXCHANGER HAVING FUNCTION OF COLLECTING FOREIGN MATTERS

A laser oscillator comprises a heat exchanger which cools a gas medium. The heat exchanger includes a cooling part which performs heat exchange between the gas medium and a cooling medium, a tubular member fixed to a frame body, and a foreign matter collection container. The tubular member is disposed so that the gas medium which flows out of the cooling part moves along an outer surface of the tubular member and then changes a proceeding direction to flow into an inlet portion. The foreign matter collection container collects foreign matters which are separated from a flow of the gas medium. 1. A laser oscillator comprising:a gas flow channel through which a gas medium which amplifies light circulates;a blower which is disposed at the gas flow channel and makes the gas medium to circulate; anda heat exchanger which is disposed at the gas flow channel and cools the gas medium; whereinthe heat exchanger includes a frame body, a cooling part which performs heat exchange between the gas medium and a cooling medium, a tubular member fixed to the frame body, and a foreign matter collection container which collects the foreign matter contained in the gas medium,the tubular member has an inlet portion of an interior flow channel communicating with an interior space of the frame body and an outlet portion of the interior flow channel connected to the gas flow channel,the cooling part is disposed so that the gas medium flowing out of the cooling part flows toward an outer surface of the tubular member,the tubular member is disposed so that the gas medium which flows out of the cooling part moves along the outer surface of the tubular member and then changes a proceeding direction to flow into the inlet portion, andthe foreign matter collection container is disposed at a location to face the inlet portion of the tubular member and formed to be capable of collecting the foreign matters separated from a flow of the gas medium.2. The laser oscillator according to claim 1 , ...

Scaling high-energy pulsed solid-state lasers to high average power

Techniques are provided for scaling the average power of high-energy solid-state lasers to high values of average output power while maintaining high efficiency. An exemplary technique combines a gas-cooled-slab amplifier architecture with a pattern of amplifier pumping and extraction in which pumping is continuous and in which only a small fraction of the energy stored in the amplifier is extracted on any one pulse. Efficient operation is achieved by propagating many pulses through the amplifier during each period equal to the fluorescence decay time of the gain medium, so that the preponderance of the energy cycled through the upper laser level decays through extraction by the amplified pulses rather than through fluorescence decay.

System and Device with Laser Array Illumination

A system includes a heat sink module and a driving circuit module. The heat sink module includes stepped through-holes that each includes a cylindrical upper and lower portions connected by a ring-shaped surface. The bottom surface of the heat sink module includes grooves that respectively pass through the lower portions of respective sequences of the stepped through-holes. The driving circuit module includes conductive connectors and electrical driving surfaces that are disposed external to the heat sink module. Each conductive connector lies within a respective groove in the bottom surface of the heat sink module. The conductive connectors include internal connectors that each link at least two stepped through-holes in a respective sequence of stepped through-holes passed by a respective groove, and include external connectors that each link at least one stepped through-hole in the respective sequence of stepped through-holes to the electrical driving surfaces. 1. A system , comprising: the heat sink module includes a respective top surface, a respective bottom surface opposite to the respective top surface of the heat sink module, and a plurality of first stepped through-holes linking the respective top surface and the respective bottom surface of the heat sink module,', 'each first stepped through-hole has a respective cylindrical upper portion and a respective cylindrical lower portion that is narrower than the respective cylindrical upper portion of said each first stepped through-hole,', 'the respective cylindrical upper portion and the respective cylindrical lower portion of said each first stepped through-hole are joined by a respective first ring-shaped surface, and', 'the respective bottom surface of heat sink module includes a plurality of grooves, wherein each groove passes through the respective lower portions of a respective sequence of first stepped through-holes among the plurality of first stepped through-holes in the heat-sink module; and, 'a heat ...

LASER OSCILLATION DEVICE

A laser oscillation device includes: a refrigerant container; at least one cartridge which is attached to the refrigerant container and which includes a laser gain medium and an incidence path section for guiding laser seed light to the laser gain medium; at least one nozzle for spraying a refrigerant to the laser gain medium, the at least one nozzle being disposed inside the refrigerant container, and a vacuum heat insulating container housing the refrigerant container inside and forming a vacuum insulation layer on an outer peripheral side of the refrigerant container. The cartridge is disposed so as to be insertable and removable with respect to the refrigerant container along a longitudinal direction of the laser gain medium. 1. A laser oscillation device comprising:a refrigerant container;at least one cartridge which is attached to the refrigerant container and which includes a laser gain medium and an incidence path section for guiding laser seed light to the laser gain medium;at least one nozzle for spraying a refrigerant to the laser gain medium, the at least one nozzle being disposed inside the refrigerant container; anda vacuum heat insulating container housing the refrigerant container inside and forming a vacuum insulation layer on an outer peripheral side of the refrigerant container,wherein the cartridge is disposed so as to be insertable and removable with respect to the refrigerant container along a longitudinal direction of the laser gain medium.2. The laser oscillation device according to claim 1 ,wherein the vacuum heat insulating container includes an incidence window for introducing the laser seed light traveling toward the incidence path section into the vacuum heat insulating container.3. The laser oscillation device according to claim 1 ,wherein the incidence path section is configured to guide the laser seed light to the laser gain medium along the longitudinal direction of the laser gain medium.4. The laser oscillation device according to ...

MULTI-BEAM LASER SYSTEM

A multi-beam laser cavity unit () comprises a laser crystal () and lens array () disposed in the laser cavity (LC). The lens array comprises an integral piece formed by a plurality of interconnected lenses. Each lens () is configured to form a respective closed optical path (OPa) along the length (Z) of the laser cavity (LC) between the cavity mirrors () through the laser crystal () corresponding to a cavity mode for generating one (LBa) of the plurality of parallel laser beams (LB). The cavity unit () can be comprised in a laser system receiving pump light (PL) from a plurality of light sources. For example, the system can be used in a maskless patterning device. 1. A multi beam laser system comprisinga front cavity mirror and a back cavity mirror forming a laser cavity there between, wherein the front cavity mirror comprises a monolithic semi-transparent mirror surface configured as a single out-coupler for coupling a plurality of parallel laser beams out of the laser cavity;a laser crystal disposed in the laser cavity and formed by a monolithic piece of gain medium configured to amplify laser light for the plurality of parallel laser beams in the laser cavity; anda lens arrays disposed in the laser cavity and comprising an integral piece formed by a plurality of interconnected lenses extending side by side in a direction perpendicular to a length of the laser cavity, wherein each lens of the lens array is configured to form a respective closed optical path along the length of the laser cavity between the cavity mirrors through the laser crystal corresponding to a cavity mode for generating one of the plurality of parallel laser beams;a plurality of light sources configured to generate pump light for pumping the laser crystal;a light guiding structure configured to guide the pump light from a respective one of the light sources to a respective pump region in the laser crystal, wherein each pump region is disposed on a closed optical path in the laser cavity ...

LASER UNIT AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

There may be provided a laser unit including a display configured to display one or both of electric power consumed by the laser unit and electric energy consumed by the laser unit. 1. A discharge-excited gas laser unit comprisinga display configured to display resource consumption of the discharge-excited gas laser unit,the resource consumption including at least one of laser gas consumption, purge gas consumption, cooling water consumption, and exhaust air consumption.2. The laser unit according to claim 1 , wherein the laser gas consumption includes at least one of:consumption of mixed gas of argon and neon; andconsumption of mixed gas of fluorine, argon, and neon.3. The laser unit according to claim 2 , further comprisinga controller configured to calculate the laser gas consumption.4. The laser unit according to claim 1 , wherein the laser gas consumption includes at least one of:consumption of mixed gas of krypton and neon; andconsumption of mixed gas of fluorine, krypton, and neon.5. The laser unit according to claim 3 , further comprisinga controller configured to calculate the laser gas consumption.6. The laser unit according to claim 1 , wherein the purge gas consumption includes at least one of consumption of nitrogen gas and consumption of helium gas.7. The laser unit according to claim 6 , further comprisinga controller configured to calculate the purge gas consumption.8. The laser unit according to claim 1 , further comprising:a charger;a pulse power module; anda chamber including a heat exchanger, whereinthe cooling water consumption includes consumption of water for cooling at least one of the charger, the pulse power module, and the heat exchanger.9. The laser unit according to claim 8 , further comprisinga controller configured to calculate the cooling water consumption.10. The laser unit according to claim 1 , wherein the exhaust air consumption includes exhaust air consumption for ventilation.11. The laser unit according to claim 10 , further ...

Laser Oscillation Device

A laser oscillation device comprises a light emitting unit for projecting a pump laser beam, a laser medium for absorbing the pump laser beam and for emitting a spontaneous emission light, a saturable absorber for absorbing the spontaneous emission light and for emitting a pulsed light, and a holder for holding the laser medium in a close contact state, wherein a portion of the holder as appressed against at least one surface of the laser medium is made of a metal and the pump laser beam is projected to an edge portion of the laser medium as appressed against the holder.

MODULAR LASER SYSTEM

Methods and related modular laser systems, e.g., distributed aperture, ultra short pulsed laser, are provided on a host platform having multiple compartments and groups of components where each group has a different environmental sensitivity such as temperature, humidity, vibration, etc or other installation constraints. Each component group is placed in different compartments of the host platform based on constraints comprising equipment, size, available installation footprint, equipment interconnection, and location constraints. For example, one group with one temperature sensitivity falling within environments provided for aircraft passengers or crews can be placed in the crew or passenger compartments. Other components having a greater temperature tolerance might be placed in an equipment bay having a different temperature range than a crew/passenger cabin. Other components might be placed in an area without any environmental controls or even pressurization (e.g., a cargo bay). Components can be located based on single, multiple, or combinations of constraints. 111.-. (canceled)12. A system with a modular laser system comprising:a modular laser system comprising a plurality of component groups, comprising a first, second, and third group, each group having components that fall within a first, second and third temperature induced equipment malfunction range;a host platform comprising multiple compartments comprising a first, second, and third compartment; andan environmental control system, wherein said environmental control system maintains a first environment in a first compartment and a second environment in said second compartment, wherein said first equipment malfunction range falls outside said first environment, wherein said second equipment malfunction range falls outside said second environment, wherein said environmental control system does not control temperature in said third compartment.13. The system as in claim 12 , wherein said platform is an ...

COOLING ARRANGEMENT FOR LASER-ACTIVE SOLID-STATE MATERIALS, LASER ARRANGEMENT AND METHOD FOR COOLING A LASER-ACTIVE SOLID-STATE MATERIAL

Cooling arrangement for laser-active solid-state materials, laser arrangement and method for cooling a laser-active solid-state material. The invention relates in particular to a cooling arrangement for the active liquid cooling of a laser-active solid-state material. In order to achieve an advantageous cooling effect, it is proposed to use a nozzle unit which is formed and adapted in order to subject the laser-active solid-state material to a directed coolant jet. 1. A cooling arrangement for the active cooling of a laser-active solid-state material , comprising:a nozzle unit formed and adapted to subject the laser-active solid-state material to a directed coolant jet of a liquid coolant (K).2. The cooling arrangement as claimed in claim 1 , wherein:the nozzle unit is formed and adapted in such a way that only a subsurface of the surface of the laser-active solid-state material is subjected to the coolant jet;the subsurface of the surface of the laser-active solid-state material, which is subjected to the coolant (K) or to the coolant jet, preferably contains the pumping surface subjected to pumping radiation during the optical pumping on the surface of the laser-active solid-state material; and/orthe subsurface is preferably a lateral side surface extending parallel to the axial direction, forming the laser emission direction, of the laser-active solid-state material.3. The cooling arrangement as claimed in claim 1 , wherein:the nozzle unit is formed and adapted, and arranged relative to the subsurface of the surface of the laser-active solid-state material, in such a way that a flow film of the coolant (K) is formed on the subsurface;the width of the flow film or coolant jet, as seen transversely to the flow direction, is preferably at least as large as the transverse dimension of the subsurface flowed over.4. The cooling arrangement as claimed in claim 1 , wherein claim 1 , between the nozzle unit and the laser-active solid-state material there is a gas ...

PLANAR WAVEGUIDES WITH ENHANCED SUPPORT AND/OR COOLING FEATURES FOR HIGH-POWER LASER SYSTEMS

This disclosure provides planar waveguides with enhanced support and/or cooling. One or more endcaps could be disposed between coating/cladding layers at one or more ends of a core region, where the core region is doped with at least one active ion species and each endcap is not doped with any active ion species that creates substantial absorption at pump and signal wavelengths. A core region could include at least one crystal or crystalline material, and at least one cladding layer could include at least one glass. Different types of coolers could be disposed on or adjacent to different coating/cladding layers. Side claddings could be disposed on opposite sides of a planar waveguide, where the opposite sides represent longer sides of the waveguide. Endcaps and one or more coolers could be sealed to a housing, and coolant can flow through a substantially linear passageway along a length of the waveguide. One side of a planar waveguide could be uncooled. 14.-. (canceled)5. An apparatus comprising:a planar waveguide configured to receive and amplify optical signals, the planar waveguide comprising a core region and at least one cladding layer disposed on the core region;wherein the core region comprises at least one crystal or crystalline material; andwherein the at least one cladding layer comprises at least one glass.6. The apparatus of claim 5 , where the at least one cladding layer comprises first and second cladding layers disposed on opposite sides of the core region claim 5 , each cladding layer comprising the at least one glass.7. The apparatus of claim 6 , wherein the first and second cladding layers have substantially different thicknesses such that the planar waveguide is asymmetrical.8. The apparatus of claim 7 , further comprising:a first cooler disposed on or adjacent to the first cladding layer and configured to cool the planar waveguide; anda second cooler disposed on or adjacent to the second cladding layer and configured to cool the planar waveguide; ...

PLANAR WAVEGUIDES WITH ENHANCED SUPPORT AND/OR COOLING FEATURES FOR HIGH-POWER LASER SYSTEMS

This disclosure provides planar waveguides with enhanced support and/or cooling. One or more endcaps could be disposed between coating/cladding layers at one or more ends of a core region, where the core region is doped with at least one active ion species and each endcap is not doped with any active ion species that creates substantial absorption at pump and signal wavelengths. A core region could include at least one crystal or crystalline material, and at least one cladding layer could include at least one glass. Different types of coolers could be disposed on or adjacent to different coating/cladding layers. Side claddings could be disposed on opposite sides of a planar waveguide, where the opposite sides represent longer sides of the waveguide. Endcaps and one or more coolers could be sealed to a housing, and coolant can flow through a substantially linear passageway along a length of the waveguide. One side of a planar waveguide could be uncooled. 18.-. (canceled).9. An apparatus comprising:a planar waveguide configured to receive and amplify optical signals, the planar waveguide comprising a core region and first and second coating or cladding layers disposed on opposite sides of the core region;a first cooler disposed on or adjacent to the first coating or cladding layer and configured to cool the planar waveguide; anda second cooler disposed on or adjacent to the second coating or cladding layer and configured to cool the planar waveguide;wherein the first and second coolers are different types of coolers.10. The apparatus of claim 9 , wherein:the first cooler comprises a direct liquid cooler; andthe second cooler comprises a conductive cooler.11. The apparatus of claim 9 , wherein the first and second coolers comprise direct liquid coolers.12. The apparatus of claim 9 , wherein at least one of the coolers comprises:a cooling manifold configured to provide cooling liquid to the planar waveguide; anda seal disposed between the cooling manifold and the planar ...

PLANAR WAVEGUIDES WITH ENHANCED SUPPORT AND/OR COOLING FEATURES FOR HIGH-POWER LASER SYSTEMS

This disclosure provides planar waveguides with enhanced support and/or cooling. One or more endcaps could be disposed between coating/cladding layers at one or more ends of a core region, where the core region is doped with at least one active ion species and each endcap is not doped with any active ion species that creates substantial absorption at pump and signal wavelengths. A core region could include at least one crystal or crystalline material, and at least one cladding layer could include at least one glass. Different types of coolers could be disposed on or adjacent to different coating/cladding layers. Side claddings could be disposed on opposite sides of a planar waveguide, where the opposite sides represent longer sides of the waveguide. Endcaps and one or more coolers could be sealed to a housing, and coolant can flow through a substantially linear passageway along a length of the waveguide. One side of a planar waveguide could be uncooled. 121.-. (canceled)22. An apparatus comprising:a planar waveguide configured to receive and amplify optical signals, the planar waveguide comprising a core region and first and second coating or cladding layers disposed on opposite sides of the core region; anda cooler disposed on or adjacent to the first coating or cladding layer and configured to cool the planar waveguide;wherein the second coating or cladding layer is uncooled.23. The apparatus of claim 22 , wherein a thickness of the first coating or cladding layer is less than a thickness of the second coating or cladding layer.24. The apparatus of claim 22 , wherein the planar waveguide is bonded or soldered to the cooler.25. The apparatus of claim 22 , wherein a transparent substrate is disposed over the second coating or cladding layer.26. The apparatus of claim 25 , wherein the transparent substrate comprises sapphire or fused silica.27. The apparatus of claim 25 , wherein the transparent substrate is configured to allow fluorescence to exit the planar ...

Systems and methods for cooling disk lasers

A cooling device for cooling heat-generating devices such as disk laser according to a desired thermal profile to generate desired edge effects and optical properties. An example cooling device includes a back plate for supporting the heat-generating device. The back plate is part of a cooling device housing with a wall providing an enclosure that contains a nozzle member. The nozzle member encloses the cooling device housing on a side opposite the back plate. A nozzle coolant surface is formed on an end of the nozzle member. The nozzle coolant surface extends outward from its center to an edge to form a coolant chamber with the back plate. Coolant fluid may enter the coolant chamber through inlet paths formed in the nozzle member and exit through a chamber gap between the nozzle coolant surface edge and inside of the housing wall.

OPTICAL DEVICE AND LASER APPARATUS

An optical device includes a core, a first cladding, a second cladding, a slanted fiber Bragg grating, and a high refractive index material. The first cladding covers the core and has a lower refractive index than the core. The second cladding covers the first cladding and has a lower refractive index than the first cladding. The slanted fiber Bragg grating is formed in the core and couples stimulated Raman scattering light, propagating through the core, to the first cladding. The high refractive index material has a higher refractive index than the second cladding and covers an outer peripheral surface of a removal portion where the second cladding is removed and a portion of the first cladding that covers the region where the slanted fiber Bragg grating is formed in the core.

OPTICAL COMPONENT, FIBER LASER UNIT, AND FIBER LASER SYSTEM

An optical component includes: a first fiber having a first end and a second end; a second fiber having a third end and a fourth end; a third fiber having a fifth end and a sixth end; a first coating layer that covers the cladding of the second fiber and has a higher refractive index than that of the cladding of the second fiber; and a first high refractive index layer that covers part of an outer peripheral surface and an end face of the second fiber. The first high refractive index layer has a higher refractive index than that of the cladding of the second fiber. The outer diameter of the cladding of the first fiber is smaller than that of the cladding of the second fiber. The outer diameter of the cladding of the third fiber is smaller than that of the cladding of the second fiber. 1. An optical component comprising: 'the first fiber comprises a core and a cladding that are optically coupled to an optical resonator at the first end;', 'a first fiber having a first end and a second end, wherein'} the third end is connected to the second end, and', 'the second fiber comprises a core and a cladding that are directly connected to the core and the cladding of the first fiber at the third end;, 'a second fiber having a third end and a fourth end, wherein'} the fifth end is connected to the fourth end, and', 'the third fiber comprises a core and a cladding that are directly connected to the core and the cladding of the second fiber at the fifth end;, 'a third fiber having a fifth end and a sixth end, wherein'}a first coating layer that covers the cladding of the second fiber and has a higher refractive index than a refractive index of the cladding of the second fiber; and 'the first high refractive index layer has a higher refractive index than the refractive index of the cladding of the second fiber,', 'a first high refractive index layer that covers, at the fourth end, part of an outer peripheral surface of the cladding of the second fiber and at least part of an end ...