ТВЕРДОТЕЛЬНЫЙ ЛАЗЕРНЫЙ ПРИБОР С ОПТИЧЕСКОЙ НАКАЧКОЙ С САМОРЕГУЛИРУЮЩЕЙСЯ ОПТИКОЙ НАКАЧКИ И УЛУЧШЕННЫМ УСИЛЕНИЕМ

Изобретение относится к лазерной технике. Твердотельный лазерный прибор с оптической накачкой содержит лазерную среду в лазерном резонаторе. Резонатор образован первым зеркалом резонатора, расположенным с первой стороны лазерной среды, и вторым зеркалом резонатора, расположенным со второй стороны, противоположной первой стороне. Первое зеркало резонатора образовано из распределенного брэгговского отражателя, на котором расположена твердотельная лазерная среда. Первые и вторые зеркала резонатора выполнены и расположены с возможностью направлять лазерное излучение из резонатора по двум различным прямым путям через лазерную среду. Лазерный диод накачки выполнен и расположен с возможностью оптически накачивать упомянутую лазерную среду путем отражения излучения накачки на отражающем излучение накачки зеркале. Отражающее излучение накачки зеркало расположено на второй стороне и выполнено с возможностью отражать излучение накачки к лазерной среде. Отражающее излучение накачки зеркало и второе ...

МОДУЛЬ СЛЭБ-ЛАЗЕРА С ДИОДНОЙ НАКАЧКОЙ И ЗИГЗАГООБРАЗНЫМ ХОДОМ ЛУЧЕЙ (ВАРИАНТЫ)

Изобретение относится к лазерной технике. Модуль слэб-лазера с диодной накачкой и зигзагообразным ходом лучей содержит установленные в корпусе: активный элемент, элементы накачки, расположенные на теплоотводах симметрично с двух сторон активного элемента, систему охлаждения и пластины из оптически прозрачного материала, размещенные с обеих сторон активного элемента, каждый элемент накачки снабжен линзой. Корпус выполнен в виде двух параллелепипедов, двух корпусов соответственно, между которыми расположен активный элемент, между каждым элементом накачки и теплоотводом размещен термоинтерфейс, система охлаждения выполнена в виде единого контура и снабжена входным, выходным каналами, каналами в теплоотводах и диафрагмами, каналы охлаждения активного элемента образованы активным элементом и пластинами из оптически прозрачного материала, а линзы выполнены конформными. Технический результат заключается в обеспечении возможности повышения КПД лазера. 4 н. и 4 з.п. ф-лы, 7 ил.

КВАНТРОН ТВЕРДОТЕЛЬНОГО ЛАЗЕРА С ТЕРМОСТАБИЛИЗАЦИЕЙ ДИОДНОЙ НАКАЧКИ

Изобретение относится к лазерной технике. Квантрон твердотельного лазера с термостабилизацией диодной накачки содержит размещенные в корпусе в виде многогранника: активный элемент, матрицы лазерных диодов, расположенные вокруг и вдоль активного элемента равномерно, и систему охлаждения, выполненную в виде двух независимых контуров для охлаждения активного элемента и матриц, контур охлаждения активного элемента содержит трубку, охватывающую активный элемент с образованием кольцевого канала шириной δ, и входной, выходной коллекторы, из которых выходят каналы. Квантрон снабжен световодами, расположенными параллельно оси активного элемента, контур охлаждения матриц содержит термоинтерфейс, теплоотводы и элементы термостабилизации, размещенные в теплообменном модуле и теплообменниках. В качестве элементов термостабилизации используются нагреватели и элементы охлаждения. Технический результат заключается в обеспечении возможности упрощения системы охлаждения активного элемента. 2 ил.

Съемная кассета для усилительного модуля

Изобретение относится к твердотельным лазерным усилителям с системой охлаждения и может быть использовано в усилителях на дисковых активных элементах с охлаждением газом/жидкостью, циркулирующим/циркулирующей по замкнутому контуру. Съемная кассета для усилительного модуля содержит активные элементы в оправах, основания, элементы крепления к усилительному модулю, входные гидродинамические профили и выходные гидродинамические профили со стабилизаторами, при этом дополнительно оснащена входными и выходными направляющими потока, на которых выполнены соответственно входные и выходные гидродинамические профили. Направляющие потока сопряжены с оправами и тремя основаниями - общим, входным и выходным, причем входные и выходные направляющие потока с одной стороны закреплены на общем основании, а с другой - на входном и выходном основаниях соответственно с образованием пространства для установки оправ со стороны входного и выходного оснований. В основаниях и направляющих потока выполнены каналы для ...

Способ увеличения энергии генерации алмазного NV-лазера

Изобретение относится к способам и устройствам усиления лазерного излучения и может быть использовано в устройствах связи для передачи информационных и управляющих сигналов. Способ увеличения энергии генерации алмазного NV-лазера обеспечивается тем, что монокристаллический алмаз, содержащий замещающий азот NS с концентрацией 20-250 ppm и NV-центры в отрицательном зарядовом состоянии с концентрацией, составляющей 2.5-5.0 % от концентрации NS, облучается импульсным лазерным излучением второй гармоники Nd:YAG-лазера с длиной волны 532 нм и дополнительно непрерывным или импульсно-периодическим низкоинтенсивным. Технический результат - увеличение энергии лазерного излучения, создаваемого алмазным NV-лазером. 2 з.п. ф-лы, 6 ил.

ТРУБЧАТЫЙ ТВЕРДОТЕЛЬНЫЙ ЛАЗЕР

... 1. Модуль усилителя для твердотельного лазера, содержащий: ! трубку, имеющую внутреннюю поверхность и внешнюю поверхность, причем трубка включает в себя активный материал лазера; ! первую подложку, примыкающую к внутренней поверхности трубки, причем первая подложка включает в себя первое множество микроканалов; ! вторую подложку, примыкающую к внешней поверхности трубки, причем вторая подложка включает в себя второе множество микроканалов; и ! множество диодных стержней, расположенных снаружи второй подложки и скомпонованных таким образом, чтобы подавать излучение оптической накачки на активный материал лазера. ! 2. Модуль усилителя по п.1, в котором трубка включает в себя два одинаково нагруженных лазерных активных элемента, разделенных между собой торическим кварцевым вращателем плоскости поляризации на 90° и оптически прозрачными концевыми крышками. ! 3. Модуль усилителя по п.1, в котором первая и вторая подложки являются оптически прозрачными. ! 4. Модуль усилителя по п.1, в котором ...

УСТРОЙСТВО ГЕНЕРАЦИИ ЛАЗЕРНОГО ИЗЛУЧЕНИЯ

КОНСТРУКЦИЯ ОПТИЧЕСКОЙ НАКАЧКИ

... 1. Конструкция оптической накачки для лазеров, которая содержит: ! - активную среду в виде цилиндрического стержня, имеющего круглое сечение; причем концы стержня введены в два кольца, выполненные из теплопроводного материала; ! - по меньшей мере, три пакета стержней диодов накачки, расположенных звездой вокруг стержня; ! - опору с регулировкой температуры посредством модуля на основе эффекта Пельтье, ! отличающаяся тем, что кольца находятся в контакте с опорой, а также тем, что пакет диодов, так называемый нижний пакет, размещен между стержнем и опорой, при этом конструкция содержит для каждого другого пакета блок теплопроводности, образующий опору для упомянутого пакета; причем эти блоки установлены на охлажденной опоре, но не находятся в контакте ни между собой, ни с кольцами. ! 2. Конструкция оптической накачки для лазеров по п.1, отличающаяся тем, что она содержит теплообменник, использующий газ в качестве теплоносителя и закрепленный на стороне модуля (8) на основе эффекта Пельтье ...

Оптический квантовый генератор

Vorrichtung zur Kühlung optischer Elemente

Aufgabe war es, eine aufwandgeringe und effiziente Kühlvorrichtung für optische Elemente, insbesondere für das aktive Medium eines Laserverstärkers, mit möglichst mechanisch spannungsarmer Aufnahme der zu kühlenden und/oder kühlenden Elemente zu realisieren und gleichzeitig einen hohen Kühleffekt zu erzeugen, wobei optische Elemente in Transmission und die Vorrichtung auch bei tiefen Temperaturen betrieben werden können. Erfindungsgemäß wird die Aufgabe durch eine Vorrichtung zur Kühlung optischer Elemente gemäß Anspruch 1 gelöst. Hierbei sind für eine mechanisch spannungsarme Wärmeübertragung von dem zumindest einen optisch transmissiven Kühlelement (3) zu einer Wärmesenke (9) zwischen dem zumindest einen optisch transmissiven Kühlelement (3) und der Wärmesenke (9) um die optische Achse (5) des zumindest einen optisch transmissiven Kühlelements (3) herum zum Zweck der Wärmeübertragung lage- und/oder formveränderbare, wärmeleitende Ausgleichselemente (7) vorgesehen.

Spannungsfreie Befestigung und Schutz von flüssigkeitsgekühlten Festkörperlaser-Medien

Optically pumped solid state amplifier for laser system

The solid state amplifier has a polarised pump source, e.g. a laser diode (7), and receives the emission by coupling optics (8). This is followed by a polarising beam splitter (9) coupled into the pumped laser medium (10). Non absorbed emissions are directed onto a reflection unit (11). The reflections are directed back onto the beam splitter and are directed onto a mirror (13). The polarisation grade of the amplifier is greater than 80 percent. The rotation of the polarisation direction takes place through a lambda /4 plate by double transit.

Laserdiodengepumpte, integrierende Laservorrichtung.

Laserverstärker und Laserresonator mit mehreren laseraktiven Medien

Solid-state hybrid laser system - with laser diode chip and associated cooling and temp. regulation elements contained in standard housing

The laser system (10) has a laser diode, a solid-state laser system or glass and two independent cooling elements contained in a common housing (G) of standard size, e.g. 25 x 25 x 8 mm.. The base of the housing is attached to a mounting plate (12) with external connections (Na...j), for electronic and supply circuits extending from the opposite side of the housing to the exit window (8) for the emitted lase light. The components of the hybrid laser system are contacted by cooling and temp. regulation elements (1,4), e.g Peltier elements, pref. with a heat spreader between the laser diode chip and the latter. ADVANTAGE - Allows for wide variations in laser system contained in standard housing, for mass production.

Solid state laser has optical resonator and pumping light source for generating pumped light beams, where resonator has laser crystal, arranged in optical axis between two reflectors, and laser crystal is activated to release laser beams

The laser has an optical resonator and a pumping light source (2) for generating pumped light beams (3a,3b). The resonator has a laser crystal, arranged in an optical axis between two reflectors (8a,8b). The laser crystal is arranged in the optical path of the pumped light beam and activated to release the laser beams with wavelengths, different from the wavelengths of the pumped light beam. A passage boring (13a) has an active tempering element (12a), where another active tempering element (12b) is connected with a heat-conducting clamp (11) in a laminar heat-conducting manner.

Verwendung eines Scheibenlasers zur Kristallisation von Siliziumschichten

Laserdiodengepumpter Festkörper Verstärker und Laser

Anordnung zur Laserkuehlung

Optische Einrichtung

Optische Einrichtung (10), umfassend ein optisches Medium (16) und zumindest einen Wärmeleitkörper (11, 12) mit einer Ausnehmung (14, 15), in der das optische Medium (16) angeordnet ist, wobei das optische Medium (16) an den Wärmeleitkörper (11, 12) mittelbar über eine dazwischen zumindest abschnittsweise angeordnete Wärmeleitfolie (18) thermisch angekoppelt und erfindungsgemäß derart ausgestaltet ist, dass die Wärmeleitfolie (18) eine umlaufende Umfangsfläche des optischen Mediums (16) zumindest abschnittsweise überdeckt, welche parallel zu einer Propagationsrichtung eines in der optischen Einrichtung geführten Laserstrahls verläuft.

Laserkristall für longitudinal diodengepumpte Festkörperlaser

Selecting laser transitions in monomode microcrystal resonator - controlling resonator temp. so that modes are shifted without frequency-pulling through choice of Q

A pumping laser diode (11) mounted on a heat sink (15) is coupled optically (12) to a monolithic lasing crystal (13) temp.-controlled by, e.g. a Peltier element (14). The emission lines of the laser radiation are selected by temp.-dependent mode displacement. The Q of the microcrystal resonator is chosen to be greater by at least two orders of magnitude than the ratio of the wavelength to the effective line width of single or multiple laser transitions. A lower limit of temp. is achieved by suppression of a complete range between two mode jumps. ADVANTAGE - Unambiguous and durable selection of laser lines in either one, two or three-line operation is achievable with relative ease and economy.

THERMISCH SELBSTKORRIGIERENDE VERSTÄRKUNGSMODULE UND ASSOZIIERTE SYSTEME UND VERFAHREN

MIT EINEM FESTKÖRPERLASER GEPUMPTES MODUL UND LASEROSZILLATOR

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

Solid state laser apparatus

A slab-shaped laser medium 1, excited by a lamp 2 and cooled by a flow of water 5, is supported at side surfaces 12 by support members 5. Deviations 52 from a smooth plane surface are formed at an inner surface of the support members 5, facing the slab, or at a back surface. The deviations, in the form of grooves or concavities, can be used to control the temperature distribution of the laser medium. They may provide a coolant path, e.g. for a flow of water. The distribution of pitch, area and/or depth of the deviations can be varied in the longitudinal and/or transverse direction of the laser medium 1.

SOLID LASER RODS

Mounting vane for optical element of a laser

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.

Electric discharge lamps

... 1,143,097. Discharge lamps; lasers. CSFCOMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. 17 Feb., 1967 [25 Feb., 1966; 22 April, 1966], No. 7814/67. Headings H1C and H1D. A flash lamp 1 in the form of a spiral wound around the ruby 2 of a laser, and enclosed in a jacket 3 through which coolant circulates, includes a cathode 5 earthed through lead 6, and an anode 7 surrounded by a conductive screen 8 which encloses the end of the tube and is electrically connected to the anode. The arrangement of the screen around the anode is stated to increase the striking voltage of the lamp.

Thermally controlled solid-state laser

... 1,085,179. Lasers. HUGHES AIRCRAFT CO. Dec. 2, 1965 [Dec. 31, 1964], No. 51189/65. Heading H1C. In a solid state laser the laser rod is mounted on a thermally conducting pedestal which extends out of the pumping cavity enclosing the rod. A cylindrical ruby laser rod is situated along one focal line of an elliptical pumping cavity including a single straight light source substantially parallel to the rod. In order to regulate the temperature of the ruby it is supported along its length by and in thermal conductive contact within a pedestal which extends outside the pumping cavity through an opening of the cavity on. the opposite side of the rod from the lamp, Figs. 1, 2 (not shown). This pedestalserves as a conducting path. to a thermal radiator area or thermal regulators, Figs. 3, 4 (not shown). Conventional air fins may be attached to the lower portion of the pedestal or the pedestal may be attached to water jackets- and the apparatus may operate in itscooling or heating mode. The optical ...

Lasers

The active medium of a laser (see Division H3) may be ruby, calcium fluoride doped with trivalent uranium or divalent samarium and lithium fluoride doped with hexavalent uranium. Rutile or titanium oxide is suggested as a suitable crystal in view of its high refractive index.

Solid state laser apparatus and laser machining apparatus

ZINC OXIDE LASER

... 1,203,073. Luminescent materials and uses thereof. MINNESOTA MINING & MFG. CO. 22 Aug., 1967 [22 Aug., 1966], No. 38703/67. Heading C4S. [Also in Division H1] The laser active medium of a laser comprises a zinc oxide crystal. A zinc oxide single crystal is vapour grown in an inert atmosphere and is then polished and cleaved to form a single crystal wafer, two parallel end faces of which are aluminium coated to form a resonator. The wafer is mounted on a copper plate in a cryostat, Fig. 9 (not shown), and pumped by an electron beam so as to emit an ultra-violet laser output which may be directed on to a phosphor to convert the ultra-violet radiation to visible radiation. Pulsed operation is instanced and the wavelength of the maximum intensity emission line varies as the crystal temperature.

Solid state laser apparatus and laser machining apparatus

Laser component

REINFORCEMENT MECHANISM WITH A LASER AMPLIFIER ENVIRONMENT IN PARALLELEPIPEDEN FORM AND PUMP MEANS WITH LAMPS

LASER AMPLIFIER AND LASER RESONATOR WITH SEVERAL LASER-ACTIVE MEDIA

LASER AMPLIFIER SYSTEM

Microchip-Laser

Ein Mierechip-Laser umfasst einen monolithischen Resonator (1 ), der einen doppelbrechenden Laserkristall (2) aufweist, wobei ein aus dem Resonator (1) ausgekoppelter Laserstrahl (9), der eine Laserwellenlänge aufweist. entlang einer Laserstrahlachse (12) aus dem Resonator (1) austritt und die auf die Richtung der Laserstrahlachse (12) bezogene Länge (L) des Resonators (1) kleiner als 150 iJm ist. Der Laserkristall (2) weist eine derartige auf die Richtung der Laserstrahlachse (12) bezogene Dicke (D) auf, dass bei einem in Richtung der Laserstrahlachse (12} erfolgenden Einfall eines die Laserwellenlänge aufweisenden Lichtstrahls (16} auf den Laserkristall (2) zwischen dem ordentlichen und dem außerordentlichen Strahl (17, 19}, in welche der Lichtstrahl (16) im Laserkristall (2) aufgeteilt wird, bei einem einzelnen Durchlauf durch den Laserkristall (2) eine Phasenverschiebung im Bereich von rr/2 +/- lT/4 auftritt.

LASER AMPLIFIER SYSTEM

SOLID LASER COOLING

SOURCE OF LASER BEAM WITH A THINNESS CRYSTAL WAFER AS LASER-ACTIVE MEDIUM ABSTENTION LASER ELEMENT

LASER SYSTEM WITH VARIABLE IN PHASE MATERIAL FOR TEMPERATURE PRICE INCREASE

TEMPERATURE-CONTROLLED MICROCHIP LASER DEVICE AND PERTINENT ONE CARRIER BUILDING GROUP

Solar light pumped laser and cooling system of solar light pumped laser

Module of a solid-state platelet light-pumped laser

High repetition rate mid-infrared laser

COMPACT END-PUMPED SOLID-STATE LASER ASSEMBLY

OPTICAL FIBER COOLING DEVICE AND LASER OSCILLATOR

The present invention makes it possible to adjust a leading end position of an optical fiber, and to efficiently cool the whole optical fiber. A cooling device of the present invention is provided with a cooling base plate (7), a fiber holder (21), and an adjustment member (22). The cooling base plate (7) has a recessed housing section (17). The fiber holder (21) is disposed in the recessed housing section (17) such that the fiber holder can freely move in the first direction. The fiber holder (21) holds a leading end section of the optical fiber (6) on the surface, and adjusts a leading end position of the optical fiber (6) in the first direction. The adjustment member (22) is disposed in a gap between the fiber holder (21) and an end surface (17b) of the recessed housing section (17), and has the optical fiber (6) placed on the surface, said adjustment member being capable of moving in the first direction by moving in the second direction intersecting the first direction. The adjustment ...

LASER LIGHT SOURCE MODULE

In manufacturing a laser light source module comprising a heat sink whereon a solid-state laser element, an excitation light source, and a wavelength conversion element are mounted, and a stem for supporting the heat sink, the heat sink is divided into three blocks, that is, a first block mounted with a laser oscillating portion for the solid-state laser element on the top face, a second block mounted with the semiconductor laser element for emitting excitation light for the laser oscillating portion and a first temperature sensor on the top face and mounted with a first heater on a predetermined face, and a third block mounted with the wavelength conversion element for wavelength-converting the fundamental wave laser light oscillated by the laser oscillating portion and a second temperature sensor on the top face and mounted with a second heater on a predetermined face. Only the second block is fastened to the stem by the side face or bottom face, the first block is fastened to another ...

ENERGY DISSIPATING PACKAGES FOR HIGH POWER OPERATION OF OPTICAL FIBER COMPONENTS

A package for dissipating heat power and/or optical power from an optical fiber component of a device is provided. The package includes a heat sink packaging receptacle for accommodating the optical fiber component having a cavity for receiving a temperature sensitive portion of the optical fiber component. According to one aspect, the package may include a power-dissipative material for dissipating heat power or optical power, the power-dissipative material extending within the cavity and surrounding the temperature-sensitive portion of the optical fiber component. According to another aspect, the package may include at least one channel extending between the cavity and an end of the heat sink packaging receptacle, the channel being in intimate contact with the cladding of the optical fiber component for dissipating heat power and/or optical power from the optical fiber component.

EXCITATION UNIT FOR A FIBRE LASER

The invention relates to an excitation unit (2) for a fiber laser, said excitation unit having an excitation fiber (3) and a longitudinal axis (6) and forming a two-dimensional or three-dimensional structure in a resonator region of the fiber laser. When viewed in cross-section, the excitation fiber (3) consists of an active fiber core (3a), a pump cladding (3b) that surrounds the active core (3a), a quartz glass casing (3) that surrounds the pump cladding (3b), and at least one cover (3e). The resonator region is equipped with a base plate (5) on which a plurality of excitation housings (18) are formed, each excitation housing delimiting a gas-tight excitation chamber (22). The excitation fiber runs through each excitation chamber at least once and is held in holding units (8) laterally to each excitation chamber when viewed in the longitudinal direction (6) of the excitation fiber. The cover of the excitation fiber is removed in some regions in the excitation chambers and is completely ...

OPTICALLY PUMPED COMPACT LASER RESONATOR

A system and a method of designing and mechanical packaging of pumped laser resonator elements to minimize their size. All the elements of the compact pumped laser resonator assembly (5) are placed on a monolithic block mount (10), which substitutes for and functions as a laser diode heatsink, a laser resonator cavity mount, and an optical bench. The laser optical cavity is in the form of a laser path (11) defined within the monolithic block mount (10) , and includes a plurality of bends (40) in order to decrease the size of the assembly. The laser resonator optical elements include fold prisms (22, 24), a reflector (38), a retroreflector (32) and an intracavity optical Q-switch (30). The resultant miniaturized diode array pumped laser resonator assembly has a volume of less than one cubic inch and dimensions less than or equal t o about 30 mm x 25 mm x 13 mm in metric units, and weighs less than two ounces or 56 g, while providing a laser power of more than 1 mJ. The compact pumped laser ...

Optischer Maser

Anordnung zur optischen Erregung eines Laserstabes

Laser-Anordnung

Verfahren zur Anregung von stimulierter Strahlungsemission eines Festkörpers und Vorrichtung zur Durchführung des Verfahrens

Redresseur

Optischer Sender oder Verstärker

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

[...] DE [...] D' [...][...] LASER.

SOLID-STATE LASER.

Device and procedure for keeping at a moderate temperature equipment for the production of laser radiation.

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Temperierung eines Geräts zur Erzeugung von Laserstrahlung, umfassend eine Vielzahl von Temperierungselementen (4, 5, 6), eine Grundplatte und Kühlkörper (9), Leistungselektronik (10) zur Bereitstellung elektrischer Leistung für die Temperierungselemente (4, 5, 6) über Versorgungsleitungen (b), eine Vielzahl von Temperatursensoren (c), eine Einheit (11) zur Erfassung der Messwerte der Temperatursensoren (c) sowie eine Prozessoreinheit (12) zur Verarbeitung der von der Einheit (11) erfassten Messwerte der Temperatursensoren (c) und Ansteuerung der Leistungselektronik (10), dadurch gekennzeichnet, dass die erfassten Messwerte sowie optional weitere Messwerte und externe Vorgaben durch den Benutzer durch die Prozessoreinheit (12) mit einer Bewertungstabelle verglichen werden und auf diesem Vergleich basierend die über die Leistungselektronik (10) an die Temperierungselemente (4, 5, 6) abzugebenden Leistungen individuell bestimmt ...

Laser device i.e. surgical laser, for performing articular cartilage surgery for e.g. human, has light amplification medium doped with holmium and thulium, and mobile element selecting wavelengths, coupler and dielectric layer rear mirror

The device has a light amplification medium (11) made of yttrium aluminum garnet (YAG) monocrystal, potassium gadolinium tungstate monocrystal, chromium, YAG ceramic, polar aprotic liquid e.g. phosphorus oxychloride and selenium oxydichloride, and YAG doped with holmium and thulium. A light dispersive element e.g. equilateral wedge, is formed of a glass. A mobile element selects wavelengths, an output coupler (12) and a dielectric layer rear mirror (14). A differential micrometric screw is driven by an engine, and is composed of an interior axle.

HIGH-ENERGY SOLID LASER.

SOLID?STATE LASER

ACTIVE ELEMENT FOR LASER SOURCE AND LASER SOURCE COMPRISING SUCH AN ACTIVE ELEMENT.

STRUCTURE OF PUMPING OPTICAL Of an AMPLIFYING MEDIUM

L'invention concerne une structure de pompage optique d'un milieu amplificateur et s'applique notamment aux lasers à solide pompés par diodes laser. Selon l'invention, la structure de pompage comprend un ensemble d'au moins trois sources lumineuses de pompage (22, 22') émettant chacune un faisceau de pompage dirigé directement vers le milieu amplificateur, un réflecteur diffusant entourant le milieu amplificateur et formé d'au moins trois blocs réflecteurs (24, 24'), chaque bloc réflecteur présentant une paroi interne propre à réfléchir la lumière non absorbée par le milieu amplificateur et étant porté par un longeron (21,21'), lesdits longerons supportant chacun au moins une source de pompage.

Divergent beam laser amplifier - employs silicone coolant

Divergent beam laser amplifier - employs silicone coolant

Laser doubled in frequency, at single frequency

La présente invention a pour objet un laser comprenant une source de rayonnement de pompage optique (12); un barreau à effet laser (14); un miroir d'entrée (16); deux lames quart-d'onde (20 et 22); des moyens de polarisation (24) adjacents à une lame quart-d'onde; pour polariser ladite lumière laser émise par ledit barreau; des moyens (26) de génération de second harmonique pour produire une sortie ayant une fréquence double de la fréquence à laquelle ledit barreau émet la lumière laser; et un coupleur de sortie (18).

Laser

DEVICE OF LONGITUDINAL PUMPING Of a LASER MEDIUM

L'invention se rapporte à un dispositif de pompage longitudinal (1) d'un milieu amplificateur laser (2) comprenant au moins une diode laser (3) apte à émettre au moins un faisceau laser, des moyens de focalisation (4, 4A, 4B) dudit faisceau laser sur ledit milieu amplificateur laser (2) et des moyens de collimation (5) dudit faisceau laser apte à générer un faisceau laser collimaté, caractérisé en ce que lesdits moyens de focalisation comprennent au moins un miroir (4, 4A, 4B), ledit miroir étant agencé de sorte que ledit faisceau collimaté soit réfléchi vers ledit milieu amplificateur (2).

AN ADJUSTABLE PRESSURE SYSTEM FOR COOLING A LASER AMPLIFIER MEDIUM.

TRANSMITTER OR OPTICAL AMPLIFIER (LASER)

LASER COOLER HAS STRONG EFFECTIVENESS

L'invention concerne un dispositif de refroidissement laser à forte efficacité, par exemple pour le refroidissement des systèmes tels que les systèmes de détection et d'amplification à faible bruit. Le dispositif selon l'invention comprend par exemple un matériau refroidisseur laser (MRL1) pour le refroidissement laser d'un système (SYS) couplé thermiquement avec ledit matériau. L'interaction du matériau avec un laser de pompe (PMP1) de fréquence prédéterminée w1 résulte en l'émission spontanée isotrope de photons de fréquence ω1 identique à la fréquence du faisceau pompe et de photons de fréquence ω2 supérieure à la fréquence ω1 du faisceau de pompe, l'émission de ces derniers photons conduisant au refroidissement du matériau refroidisseur. Le dispositif selon l'invention comprend en outre des moyens de recyclage permettant de renvoyer vers le matériau refroidisseur laser (MRL1) les photons de fréquence ω1. Selon une variante, les moyens de recyclage comprennent une coque (COQ) de forme ...

staff lasers of Apparatus and method for cooling

광파이버, 및 이것을 이용한 레이저 발진기

... 광파이버(6)는, 제1 광파이버 본체(61), 제2 광파이버 본체(62), 및 제1 엔드 캡(63)을 구비하고 있다. 제1 광파이버 본체(61)는, 제1 코어(611) 및 제1 클래드(clad)(612)를 가진다. 제2 광파이버 본체(62)는, 제2 코어(621) 및 제2 클래드(622)를 가지고, 제1 단면(端面)(623)이 제1 광파이버 본체(61)의 제1 단면(613)에 접합되어 있다. 제1 엔드 캡(63)은, 광 투과성이고, 제2 광파이버 본체(62)의 제2 단면(624)에 접합되어 있다. 제1 코어(611)는 레이저 매질(媒質)이 도프(dope)되어 있다. 제2 코어(621)에 있어서의 레이저 매질의 질량 함유율은, 제1 코어(611)에 있어서의 레이저 매질의 질량 함유율보다도 낮다.

Apparatus of Laser with cooler

나노초-이하의 확장 스펙트럼 발생 레이저 시스템

... 본 발명은 벌크 이득 매체 내에서 증폭되고 스펙트럼적으로 확장되는 짧은 레이저 펄스를 생성하기 위한 시스템 및 방법을 제공한다. 레이저 이득 및 비선형적 성질을 가지는 벌크 재료는 광학적 펌프 입력 및 시드 입력에 동시에 노출되고, 펌프 파워는 시드 펄스를 증폭하고 스펙트럼적으로 확장하기에 충분하다.

GREEN LASER MODULE PACKAGE CAPABLE OF MAXIMIZING RELIABILITY AND STABILITY

PURPOSE: A green laser module package capable of maximizing reliability and stability is provided to prevent a malfunction by precisely controlling an operating temperature of devices comprising a green laser module. CONSTITUTION: A green laser module package(100) capable of maximizing reliability and stability comprises a stem(180), a pumping light source(110), a laser medium(120), an optical crystal(130), a first thermoelectric device(150), an optical parts, and a permeable window(190). The stem is positioned at a base plane of the green laser module package. The pumping light source generates and outputs a pump light. The laser medium receives the pump light, and outputs an infrared light. The optical crystal receives the infrared light, and outputs a laser light of a green wavelength. The first thermoelectric device is positioned on the stem, and controls an operating temperature of the pumping light source by thermally coupling with the pumping light source. The optical parts reflect ...

METHOD AND SYSTEM TO CONTROL TEMPERATURE DIFFERENCE OF SOLID LASER LIGHT PUMPING MEDIUM

The present invention relates to a method and a system to control the temperature difference of a solid laser light pumping medium, which controls an optical path difference to make a temperature distribution in a gain medium uniform when optically pumping a laser light generated from a laser diode through the gain medium. The system of the present invention comprises: a pumping beam device which generates a laser light through a laser diode to output it into a pumping beam; a solid laser oscillator which receives the laser light to optically pump through a light pumping medium; and a light pumping control device located between the pumping beam device and the solid laser oscillator to control the temperature difference of the solid light pumping medium by scattering the laser light through a plurality of light fibers before the laser light outputted from the pumping device is incident upon the solid light pumping medium. COPYRIGHT KIPO 2017 (110) Pumping beam device (130) Light pumping ...

TRANSMITTER OR OPTICAL AMPLIFIER (LASING)

ANORDNING FOR KYLNING AV ETT LASERHUVUD

TRANSVERSE PUMPED LASER AMPLIFIER ARCHITECTURE

An optical gain architecture includes a pump source and a pump aperture. The architecture also includes a gain region including a gain element operable to amplify light at a laser wavelength. The gain region is characterized by a first side intersecting an optical path, a second side opposing the first side, a third side adjacent the first and second sides, and a fourth side opposing the third side. The architecture further includes a dichroic section disposed between the pump aperture and the first side of the gain region. The dichroic section is characterized by low reflectance at a pump wavelength and high reflectance at the laser wavelength. The architecture additionally includes a first cladding section proximate to the third side of the gain region and a second cladding section proximate to the fourth side of the gain region.

LASER THERMAL MANAGEMENT SYSTEMS AND METHODS

A laser system thermal management system includes a laser gain assembly and a thermal management assembly. The laser gain assembly includes a laser gain medium and may include laser pump diodes. The thermal management system includes a high pressure gas tank connected to an open-cycle Joule-Thompson refrigerator. Cooled and partially liquefied gas is introduced into a reservoir. The reservoir may be in good direct thermal contact with the laser gain assembly or via a closed loop recirculating fluid heat exchanger. The heat generated by the laser gain assembly is removed by heat exchange with the cooled gas and condensate in the reservoir either by direct thermal contact or via the recirculating heat exchanger loop. Gas evaporating in the reservoir is vented.

FOIL SLOT IMPINGEMENT COOLER WITH EFFECTIVE LIGHT-TRAP CAVITIES

A slot impingement cooler (20) is formed of a plurality of sets of foils (42) in a stacked and registered array. In each set of foils (42), a first foil (44) has supply slots (56) that direct a flow of coolant, a second foil (46) has a plurality of effective light-trap cavities (62), a third foil (48) has return slots (68) that return the flow of coolant, and an optional fourth foil (50) has a plurality of effective light-trap cavities (74). The foils (44, 46, 48, 50) have registered supply manifold openings (52, 58, 64, 70) and registered return manifold openings (54, 60, 66, 72) therethrough.

LASER CAVITY PUMPING METHOD AND LASER SYSTEM THEREOF

Pumping method of discrete elements solid state laser systems pumped by semiconductor laser diodes, which sends a pump beam (10; 60) through an active medium (9;33;63), comprising a first face (22) first crossed by said pump beam (10; 60), and a second face (23) met as second by said pump beam (10; 60), a pumping axis being associated to the pump beam (10; 60), the active medium (9;33;63) being inserted in a cavity to which a cavity propagation axis (26) is associated. According to the invention, the pumping axis (17) coincides with the cavity propagation axis (26) inside the active medium (9;33;63), and is perpendicular to an optical surface (23;31) met by the pump beam (10; 60) after crossing the active medium (9;33;63), said optical surface (23;31) being at least partially reflecting at the wavelength of the pump beam (10).

POWER SCALABLE OPTICAL SYSTEMS FOR GENERATING, TRANSPORTING, AND DELIVERING HIGH POWER, HIGH QUALITY LASER BEAMS

Power scalable, rectangular, multi-mode, self-imaging, waveguide technologies are used with various combination of large aperture configurations, 20, 50, 80, 322, 324, 326, 328, 330, 332, 334, 336, 338, Gaussian 360 and super-Gaussian 350 beam profiles, thermal management configurations 100, flared 240 and tapered 161 waveguide shapes, axial or zig-zag light propagation paths, diffractive wall couplers 304, 306, 308, 310, 312, 314, 316, 318, 320 and phase controller 200, flexibility 210, phased arrays 450, 490, beam combiners 530, 530', and separators 344, 430, and other features to generate, transport, and deliver high power laser beams.

FIBRE BUNDLE COUPLED CIRCULAR SLAB LASER SYSTEM

A rod/slab/fibre bundle hybrid laser oscillator system in which annular rod (1) is coupled to a phase locked fibre bundle (6) via a microlens array (4) the laser resonator being defined by the rear mirror (2) which is 100 % reflecting at the laser wavelength and fully transmitting at the pump wavelength and the mirrored fibre bundle end (7). The laser medium (1) can be excited with lamps (9) and water cooled with fluid (11). Output beam (8) can be scaled by coupling a multiple of the inventions together via output fibres (6).

DIODE-PUMPED SOLID STATE LASER SYSTEM UTILIZING HIGH POWER DIODE BARS

Disclosed herein is a diode-pumped solid state (DPSS) laser having a laser rod (110) and a diode array, located proximate the laser rod. In one embodiment, the diode array includes a plurality of high power diode bars spaced along the diode array, where each is configured to emit radiation therefrom. In addition, in this embodiment, the spacing of the high power diode bars and the location of the diode array with respect to the laser rod are selected to allow the laser rod to receive the radiation from the high power diode bars in a substantially uniform distribution. In addition, a method of manufacturing a DPSS laser, and a DPSS laser assembly are also disclosed.

METHOD FOR COOLING SEMICONDUCTOR LASER DIODES AND LIGHT EMITTING DIODES

A semiconductor laser diode element in contact with a non-electrically conductive, chemically inert liquid resulting in a dramatically increased operational lifetime for the semiconductor laser diode element by preventing damaging heat build up to vulnerable areas of the laser diode element. Preferably the liquid is a perfluorinated liquid. The liquid may be either static or flowing. The laser diode may be used independently or to pump another laser element. The liquid can also be in contact with the lasing element, collimating lens, sub-mounts, or thermo-electric coolers in a lasing assembly. Alternatively, an LED may be in contact with the non-electrically conductive, chemically inert liquid to dramatically increase the operational lifetime and the range of power usage of an LED. Preferably the liquid is a perfluorinated liquid. The liquid can either be static or flowing.

SOLID-STATE LASER

Described is a solid-state laser comprising a resonator (12), at least one solid-state rod (46, 48) located in the resonator, and a pump power supply (174) exciting the solid-state rod. In order to improve a laser of this kind so that the heat losses can be controlled more easily and excitation is simpler at higher power levels, it is proposed that a coupled resonator is used and that the resonator has two longitudinally disposed excitation zones (14, 16) lying in the same plane, one of the two solid-state rods being located in each beam (20, 22). The resonator has a coupling zone (28) into which the beams (24, 26) from the excitation zones enter as parallel outer beams travelling a certain distance apart. The resonator couples the excitation zones with each other by shifting, with the outer beams, in the plane defined by the beams, to a coupling axis (30) lying between and parallel to the beams and beyond this axis. The solid-state rods are cooled on one side and irradiated by the pump ...

DIODE-PUMPED DOUBLE FREQUENCY SOLID STATE LASER

The invention relates to diode-pumped double-frequency solid state laser, in which all elements of the resonator as well as the internal resonator elements (laser crystal (6), mirror (11), frequency doubler (8)) are lodged in or on an angle or u-shaped profile (1), which is made as a solid part in a single milled piece or as a cast, pressed or sintered part of metal or ceramic, said profile comprising one or more partition walls (7a, 7b), which are part of the same piece as the angle or u-shaped profile, that is, which have no connecting points by means of screws or the like, and which give additional stability to the profile. Furthermore, said walls are lodged in or on the same element of the resonator or of the internal resonator elements (e.g. frequency doubler, mirror, laser crystal) and comprise openings (15) to allow passage of the laser mode and/or the laser radiation.

Stress-optimized laser disk mounting systems

This disclosure relates to laser disk mounting systems and methods. The laser disk mounting systems comprise a disk module with a round disk-shaped heat sink having a front side, a rear side, and an edge surface connecting the front side and the rear side, and a laser disk arranged on the front side of the heat sink, and a radial mounting device with an opening for receiving the disk module, wherein the disk module is mounted in the radial mounting device such that a force action is applied in radial direction on the edge surface.

All solid state optical cryocooler using intracavity optically pumped semiconductor lasers and a method of making the same

A device and corresponding method for cooling electronics is disclosed. The device is an all-solid-state optical cryocooler and can include an optically pumped semiconductor laser (OPSL); a cavity configured to receive and control absorption of the optically pumped semiconductor laser, the cavity having a high reflection (HR) surface and an anti-reflection (AR) surface; and a doped crystal housed within the cavity, the doped crystal configured to cool in response to input of the optically pumped semiconductor laser. The method can include supplying an intracavity optically pumped semiconductor lasers to a doped crystal within a cavity; and configuring the cavity to include a high reflection (HR) surface and an anti-reflection (AR) surface, the HR surface and AR surface formed on or in connection with the doped crystal to increase pump light absorption at the crystal within the cavity.

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.

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.

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 ...

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.

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.

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 ...

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.

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 ).

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 ...

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 ...

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.

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 ...

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 ...

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.

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 ...

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 ...

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.

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.

SOLID-STATE LASER SYSTEMS

A laser includes a laser pump source (), a pump-beam coupler () coupled with the laser pump source, a laser gain medium () comprising Yb:CALGO, a second-harmonic generator () and an output coupler (). The SHG may include a chirped PPLN or PPLT. The laser gainmedium () may comprise a gradient doping or plural segments (-) with different doping concentration. 1. A solid state laser system , comprising:a laser medium, wherein said laser medium comprises Yb:CALGO, wherein the laser medium has a length that is greater than or equal to 1 mm and less than 3 mm; anda frequency doubler device positioned in an optical path after the laser medium.2. The laser system of claim 1 , wherein the frequency doubler is at least one of a PPLN and a PPLT.3. The laser system of claim 1 , wherein the at least one of a PPLN and a PPLT is chirped.4. The laser medium of claim 1 , wherein the laser medium has a doping of Yb in a range between and including approximately 1 at. % doped to 10 at. % doped.5. The laser medium of claim 4 , wherein the laser medium has a doping of Yb of approximately 3 at. % doped.6. (canceled)7. The laser system of claim 1 , wherein the laser medium has a length of approximately 5 mm.8. The laser system of claim 1 , the laser medium has a gradient doping along a length of the laser medium.9. The laser system of claim 8 , wherein the gradient doping of the laser medium comprises a dopant concentration in a range between and including approximately 0.1 at. % and 1.0 at. % at a first face of the laser medium and gradually increases to a dopant concentration in a range of between and including approximately 2 at. % and 6 at. % toward the center of the laser medium.10. The laser system of claim 1 , wherein the frequency doubler is a periodically poled SHG having linearly chirped gratings of at least one of same and/or different chirp rates.11. The laser system of claim 1 , further comprising a pump source optically positioned before the laser gain medium.12. The laser ...

Solid-state laser device

Provided is a solid-state laser device in which a linear resonator including an output mirror and a rear mirror, a laser rod, and optical members are provided on a common base and are contained in a housing having the base as a portion. A holding part is provided to hold an excitation light source that extends parallel to the laser rod on a side of the laser rod opposite to the base. The optical members including a Q-switch are disposed between the laser rod and the rear mirror. An upper end position of the output mirror is at a position lower than a lower end position of the excitation light source held by the holding part, with the base as a reference. The holding part holds the excitation light source so as to be capable of being inserted and extracted with respect to the output mirror side in a longitudinal direction of the excitation light source.

SOLID-STATE LASER DEVICE

A solid-state laser device includes a laser rod made of an alexandrite crystal; a flash lamp that outputs excitation light for exciting the laser rod, a glass tube for a lamp being made of quartz glass that at least blocks deep ultraviolet light having a wavelength of 200 nm to 300 nm, and transmits visible light having a wavelength of 400 nm or more; and a laser chamber that contains a tubular reflector that includes a hole part containing at least a portion of the laser rod or a portion of the flash lamp and is made of a porous material of polytetrafluoroethylene, an inner wall surface of the hole part being as a reflecting surface that reflects the excitation light. 1. A solid-state laser device comprising:a laser rod made of an alexandrite crystal;a flash lamp that outputs excitation light for exciting the laser rod, a glass tube for a lamp being made of quartz glass that at least blocks deep ultraviolet light having a wavelength of 200 nm to 300 nm, and transmits visible light having a wavelength of 400 nm or more; anda laser chamber that contains a tubular reflector that includes a hole part containing at least a portion of the laser rod or a portion of the flash lamp and is made of a porous material of polytetrafluoroethylene, an inner wall surface of the hole part being a reflecting surface that reflects the excitation light.2. The solid-state laser device according to claim 1 ,wherein the glass tube for a lamp is a glass tube in which a change in transmittance of light having a wavelength of 400 nm is within 5% while 4 million shots to 14 million shots are performed in a case where the flash lamp is driven.3. The solid-state laser device according to claim 1 ,wherein the flash lamp is subjected to aging processing of 1 million shots or more.4. The solid-state laser device according to claim 1 , further comprising:an inlet/outlet mechanism for cooling water that cools the flash lamp and the laser rod.5. The solid-state laser device according to claim 1 , ...

SOLID-STATE LASER DEVICE

A solid-state laser device includes a resonator composed of a pair of mirrors, a laser rod disposed in the resonator, and a laser chamber. The resonator and the laser rod are disposed in a housing. The laser rod is inserted through a hole of the laser chamber and is supported in a state in which two end portions are exposed. An O-ring is disposed at an exposed root of at least one rod end portion exposed from the laser chamber. The solid-state laser device includes a cover member that is disposed on a rod side surface of the rod end portion between the O-ring and a rod end surface and that blocks incidence of stray light, which is generated in the housing, on the O-ring. 1. A solid-state laser device comprising:a resonator composed of a pair of mirrors;a laser rod disposed in the resonator; anda laser chamber that contains at least a part of the laser rod,wherein the resonator and the laser rod are disposed in a housing,wherein the laser chamber comprises a hole having a columnar shape that is shorter than a longitudinal axial length of the laser rod,wherein the laser rod is inserted through the hole of the laser chamber and is supported in a state in which two end portions of the laser rod are exposed from the hole,wherein an O-ring is disposed at an exposed root of at least one end portion of the two end portions, the exposed root being exposed from the laser chamber, andwherein the solid-state laser device comprises a cover member that is disposed on a side surface of the laser rod between the O-ring and an end surface of the at least one end portion of the laser rod and that blocks incidence of stray light, which is generated in the housing, on the O-ring.2. The solid-state laser device according to claim 1 , wherein the cover member is made of at least one of a ceramic claim 1 , glass claim 1 , or a fluororesin.3. The solid-state laser device according to claim 1 , comprising:an aperture member that is disposed in a light path of the resonator, that suppresses ...

Compact Calibration and Testing System For High Power Lasers and Optics

A compact high power laser calibration and testing system includes an active intracavity laser system that amplifies the laser power by recycling photons through a thin disk gain medium that is positioned between two or more highly reflective mirrors. The system is configured for calibration and testing of the high power lasers and optics that can be inserted into or positioned at the end of the intracavity. In another embodiment, the system is configured for characterization of high power laser beam propagation in operation-relevant atmospheres. The intracavity high power laser beam is configured to simulate high power laser beams with orders-of-magnitude reduced size, weight and operation power for calibrating laser powers and testing optical components. In applications that require an extra small footing or high portability, thermal management systems are configured to absorb large amounts of heat from the system for fixed time durations with the use of exchangeable cartridges made of phase change materials. The portability of the invention can be further increased and the system footing can be decreased by powering the system with disposable or rechargeable battery cartridges that can be rapidly replaced. 1. An optical calibration and testing system comprising:(a) an intracavity laser beam in which a laser beam is recycled plural times; and a thin disk gain medium that generates laser power, and', 'a high reflectance mirror either coated or attached on the gain medium, and', a solid metal block comprising aluminum, copper, beryllium or their alloys, or', 'a semiconductor wafer that is attached to a solid or hollowed-out metal block, or', 'a diamond wafer that is attached to a solid or hollowed-out metal block,', 'wherein the hollowed-out metal block filled with a phase change material comprising paraffin, fatty acids, salt hydrates, eutectics or any combination of these materials,, 'a heat sink comprising, a solid metal bock, or', 'paraffin, fatty acids, salt ...

High average power integrated optical waveguide laser

A high power laser whose output is a matrix of individual phase controlled pixels is disclosed, each pixel containing a number of low power, single transverse mode, phase coherent gain channel outputs. Each row of pixels is formed as an optical pump waveguide that is transverse or orthogonal to a number of parallel, longitudinal gain channels integrated within or adjacent to the transverse pump waveguide. Optical pump energy is produced and injected by a number of parallel laser diode bars, located along both longitudinal sides of the pump waveguide. Waste thermal energy from the pump diodes and gain channels is extracted from each laser row by integrating the row pump waveguide, gain channels, and pump diodes within a heat exchanger. 1. A laser , comprising:a. a waveguide center;b. a plurality of gain channels arranged longitudinally along the waveguide center, wherein the plurality of gain channels are separated into a plurality of gain channel groups across the waveguide center;c. a plurality of laser diode bars arranged orthogonally to the plurality of gain channels.2. The laser of claim 1 , wherein each of the plurality of gain channels comprise a cross-sectional area small enough that a single transverse transmission mode is dominate in the gain channels.3. The laser of claim 2 , wherein each of the plurality of gain channels are about 10 microns high and about 10 microns wide.4. The laser of claim 1 , wherein the waveguide center comprises a top side and a bottom side claim 1 , and wherein the laser further comprises a first heat exchanger surface attached at the top side of the waveguide center and a second heat exchanger surface attached at the bottom side of the waveguide center.5. The laser of claim 4 , further comprising a first cladding layer between the waveguide center and the first heat exchanger surface claim 4 , and a second cladding layer between the waveguide center and the second heat exchanger surface.6. The laser of claim 1 , wherein each of ...

LASER OSCILLATOR

A laser oscillator having a condensation prevention mechanism capable of extending the life span of a light emitting device while maintaining cost effectiveness as compared to the conventional technique is provided. The laser oscillator includes: a laser beam generating unit; a heat exchanger; a coolant bypass circuit; a coolant circuit connecting these components; a housing storing these components; a coolant circulating unit that circulates a coolant to the laser beam generating unit, the heat exchanger, and the coolant bypass circuit with the aid of the coolant circuit; a first valve that adjusts a flow rate of the coolant supplied to the laser beam generating unit; a second valve that adjusts a flow rate of the coolant supplied to the heat exchanger; a third valve that adjusts the flow rate of the coolant supplied to the coolant bypass circuit; a dew point measuring unit that measures a dew point inside the housing; a temperature measuring unit that measures a coolant temperature; and a control unit that controls the first, second, and third valves on the basis of the dew point and the coolant temperature. 1. A laser oscillator comprising:a laser beam generating unit;a heat exchanger that cools a surrounding with a coolant;a coolant bypass circuit;a coolant, circuit connected to the laser beam generating unit, the heat exchanger, and the coolant bypass circuit;a housing that stores the laser beam generating unit, the heat exchanger, the coolant bypass circuit, and the coolant circuit;a coolant circulating unit that circulates the coolant to the laser beam generating unit, the heat exchanger, and the coolant bypass circuit with the aid of the coolant circuit;a first valve that adjusts a flow rate of the coolant supplied to the laser beam generating unit;a second valve that adjusts a flow rate of the coolant supplied to the heat exchanger;a third valve that adjusts a flow rate of the coolant supplied to the coolant bypass circuit;a dew point measuring unit that ...

UV LASERS AND UV RAMAN SYSTEMS FOR EFFECTIVE AND EFFICIENT MOLECULAR SPECIES IDENTIFICATION WITH RAMAN SPECTROSCOPY

The present invention relates to a novel stand-off distance chemical detector system such as can be used, for example, for standoff detection of explosives. Instead of a conventional lasing medium, a Pr:YAG or Pr:BYF based UV laser is used which can be advantageously implemented in Raman spectroscopy. 1. A solid state laser for generating a UV laser for a UV Raman detector comprising:a. a resonator cavity having a main intra-cavity optical path;b. a pumped Pr:YAG or Pr:BYF lasing medium along the main intra-cavity optical path configured to generate a laser with an emission line resonating in the visible light spectrum;c. a frequency doubling crystal along the main intra-cavity optical path configured to convert the visible light oscillation to UV oscillation at <250 nm;d. an optical component along the main intra-cavity optical path configured to direct the UV oscillation out of the cavity for extra-cavity UV laser output for use in a Raman spectrometry detection scheme.2. The solid state laser of wherein: i. a Pr:YAG lasing medium;', 'ii. at least one pump laser diode;', 'iii. adapted to create a visible light oscillation; and, 'a. the pumped lasing medium comprisesb. the doubling crystal comprises a BBO harmonic conversion crystal adapted to covert the visible light oscillation to UV oscillation.3. The solid state laser of wherein the solid state laser is pumped with plural pumping laser diode and:a. the visible light oscillation is at 488 nm;b. the UV oscillation is at 244 nm.4. The solid state laser of wherein the at least one laser pump diode are in one of:a. an end-pumped axial arrangement; orb. a transaxial arrangement.5. The solid state laser of wherein the resonator cavity comprises a concave-convex resonator.6. The solid state laser of wherein the resonator cavity comprises a cross-porro prism resonator.7. The solid state laser of wherein the resonator cavity comprises a double-pass axial concentrator resonator.8. The solid state laser of wherein the ...

Tunable laser with high thermal wavelength tuning efficiency

A monolithically integrated thermal tunable laser comprising a layered substrate comprising an upper surface and a lower surface, and a thermal tuning assembly comprising a heating element positioned on the upper surface, a waveguide layer positioned between the upper surface and the lower surface, and a thermal insulation layer positioned between the waveguide layer and the lower surface, wherein the thermal insulation layer is at least partially etched out of an Indium Phosphide (InP) sacrificial layer, and wherein the thermal insulation layer is positioned between Indium Gallium Arsenide (InGaAs) etch stop layers.

Solid-state laser

A solid-state laser has an amplifying laser medium for producing a laser beam and a pump device that has at least one laser diode and that produces a pump radiation that impinges on a first side face of the laser medium, which side face is parallel to a z axis and parallel to a y axis that is at right angles to the z axis. On a second side face, which is opposite the first side face, the laser medium is cooled by a heat sink. The length of a y−1/e2 region of the pump radiation is shorter than the length of the first side face of the laser medium in the direction of the y axis, wherein the y−1/e2 region of the pump radiation denotes a section of the y axis over which the intensity of the pump radiation on the first side face of the laser medium has a value that is more than the maximum intensity of the pump radiation on the first side face of the laser medium divided by e2. The length of a y cooling region, which length denotes a section of the y axis, over which a cooling strip extends is less than 70% and greater than 50% of the length of a y pump region of the laser medium, wherein the y pump region denotes a section of the y axis over which 80% of the total power of the pump radiation that is absorbed by the laser medium is absorbed and at the two ends of which the intensity of the pump radiation is of equal magnitude.

LASER COMPONENT

A laser component is provided, including a laser medium and a transparent heat transmitting member, at least one of which is oxide. Bonding surfaces of the laser medium and the transparent heat transmitting member are exposed to oxygen plasma, and thereafter the bonding surfaces are brought into contact without heating. The laser medium and the transparent heat transmitting member are bonded at atomic levels, their thermal resistance is low, and no large residual stress is generated due to the bonding taking place under normal temperature. The process of oxygen plasma exposure ensures transparency of their bonding interface. The laser medium and the transparent heat transmitting member are stably bond via an amorphous layer. 1. A method of manufacturing a laser component that bonds a laser medium and a transparent heat transmitting member , wherein at least one of the laser medium and the transparent heat transmitting member is oxide , the method comprising:exposing both of bonding surfaces of the laser medium and the transparent heat transmitting member to oxygen plasma;radiating inert gas atomic beam to both of the bonding surfaces in vacuum after the exposing; andbringing the bonding surfaces into contact after the radiating.2. The method according to claim 1 , wherein the bonding surfaces are brought into contact without heating.3. A laser component comprising a laser medium and a transparent heat transmitting member claim 1 , whereinat least one of the laser medium and the transparent heat transmitting member is oxide,the laser medium and the transparent heat transmitting member are bonded via an amorphous layer, andthe amorphous layer is transparent to an excitation beam.4. The laser component according to claim 3 , wherein the laser medium is an optical gain material.5. The laser component according to claim 3 , wherein the laser medium is a nonlinear optical material.6. The laser component according to claim 3 , further comprising:a dielectric multilayer ...

Diffuse reflectors and methods of use thereof

In some embodiments, the present invention provides for a laser pump chamber, including: at least one laser gain medium, at least one excitation source, and at least one diffuse reflector to direct and redirect an emission from the excitation source into the laser gain medium, wherein the at least one diffuse reflector is made from a diffuse reflector material comprising at least one of: 1) white quartz and 2) BaSO4.

2097nm Laser Resonator and Method

A flash lamp pumped CTH:YAG resonating laser and means for operating the laser whereby the laser is capable of lasing at the 2097 nm wavelength. The means for operating at the 2097 nm wavelength include utilizing an output coupler with a lower reflectivity and minimizing the passive losses in the laser. The resulting laser is capable of operating with a lower intra-cavity energy density and increased output energy, decreasing the probability of optical breakdown of the laser components when operated.

Method for manufacturing optical element and optical element

A method for manufacturing an optical element is a method for manufacturing an optical element in which laser light is transmitted, reciprocated, or reflected, and the method includes a first step of obtaining a bonded element formed by subjecting a first element part and a second element part, both being transparent to laser light, to surface activated bonding with a non-crystalline layer interposed therebetween; and after the first step, a second step of crystallizing at least a portion of the non-crystalline layer by raising the temperature of the bonded element. In the second step, the temperature of the bonded element is raised to a predetermined temperature that is lower than the melting points of the first element part and the second element part.

Amplifier assembly

An amplifier assembly may include a first heat sink plate that includes a first channel, a second heat sink plate that includes a second channel, and an amplifier rod disposed in the first channel and the second channel. The second heat sink plate may be connected with the first heat sink plate such that the first channel and the second channel align. The amplifier rod may be connected to the first heat sink plate and the second heat sink plate by a non-eutectic solder.

High-Power Mode-Locked Laser System and Methods of Use

A high-power mode-locked laser system is disclosed herein which includes at least one pump source, at least one laser cavity formed by at least one high reflector and at least one output coupler, and at least one ytterbium-doped optical crystal positioned within the laser cavity in communication with the pump source, the ytterbium-doped optical crystal configured to output at least one output signal of at least 20 W, having a pulse width of 200 fs or less, and a repetition rate of at least 40 MHz. 1. A high-power mode-locked laser system , comprising:at least one pump source configured to output at least one pump signal;at least one laser cavity formed by at least one high reflector and at least one output coupler;at least one Yb-doped optical crystal positioned within the at least one laser cavity, the at least one Yb-doped optical crystal in communication with the at least one pump source and pumped by the at least one pump signal, the at least one Yb-doped optical crystal configured to output at least one output signal having a output power of 20 W or more and pulse width of 200 fs of less.2. The high-power mode-locked laser system of wherein the at least one pump signal comprises a continuous wave pump signal.3. The high-power mode-locked laser system of wherein the at least one output signal comprises a continuous wave mode-locked signal.4. The high-power mode-locked laser system of wherein the at least one pump source comprises multiple laser diode emitters located within a single diode package coupled to a single fiber optic device claim 1 , each emitter configured to output an optical signal into the single fiber optic device claim 1 , the single fiber optic device configured to receive the optical signals from the multiple laser diode emitters and output a single pump signal.5. The high-power mode-locked laser system of further comprising at least one at least one crystal mount positioned within the at least one laser cavity claim 1 , the at least one ...

OBJECT INFORMATION ACQUIRING APPARATUS AND LASER APPARATUS

An object information acquiring apparatus is used which includes: a laser medium; a temperature controlling unit for controlling a temperature of the laser medium; an excitation unit for exciting the laser medium; a control unit for controlling the temperature controlling unit and the excitation unit; a probe for receiving acoustic waves that are generated when an object is irradiated with a laser beam from the laser medium; and a processing unit for acquiring characteristic information relating to the object from the acoustic waves, wherein the control unit does not operate the excitation unit until the temperature of the laser medium falls within a predetermined range. 18.-. (canceled)9. A laser apparatus , comprising:a laser medium;temperature controlling means configured to control a temperature of the laser medium;excitation means configured to excite the laser medium;control means configured to control the temperature controlling means and the excitation means;first temperature measuring means configured to measure a first temperature of the laser medium; andsecond temperature measuring means configured to measure a second temperature of a substance which is circulated near the laser medium for heating the laser medium,wherein the control means is configured to control the excitation means based on the first temperature and the second temperature.10. The laser apparatus according to claim 9 , wherein the control means is configured not to activate the excitation means until the first temperature reaches a first predetermined value.11. The laser apparatus according to claim 10 , wherein the first predetermined value is 80 degrees Celsius.12. The laser apparatus according to claim 9 , wherein the control means is configured not to activate the excitation means until the second temperature reaches a second predetermined value.13. The laser apparatus according to claim 12 , wherein the second predetermined value is larger than 20 degrees Celsius and smaller than ...

SYSTEM FOR OPTICAL WIRELESS POWER SUPPLY

A system incorporating safety features, for optical power transmission to receivers, comprising an optical resonator having end reflectors and a gain medium, a driver supplying power to the gain medium, and controlling its small signal gain, a beam steering apparatus and a controller to control at least the beam steering apparatus and the driver. The controller responds to a safety risk occurring in the system, by outputting a command to change at least some of the small signal gain of the gain medium, the radiance of the optical beam, the power supplied by the driver, the scan speed or the scan direction and position of the beam steering apparatus, or to register the scan pose which defines the location of said optical-to-electrical power converter. The controller may also ensure a high overall radiance efficiency, and may warn of transmitted power not received by a targeted receiver. 1. A system for optical wireless power transmission to at least one power receiving apparatus , said system comprising:{'sup': −1', '−1, 'an optical resonator having end reflectors and a gain medium, said gain medium comprising either (i) a semiconductor material, or (ii) a solid host, doped with Neodymium ions and in optical communication with a filter attenuating radiation for at least one frequency having a wave number in the range 8,300 cmto 12,500 cm, and wherein said gain medium(a) is positioned inside said optical resonator,(b) has a first bandgap energy, and(c) is thermally attached to a cooling system,such that said gain medium is configured to amplify light passing through it, and said resonator is configured to emit an optical beam of said light;a driver configured to supply power to said gain medium, and enabling control of the small signal gain of said gain medium;a beam steering apparatus configured to direct said optical beam in at least one of a plurality of directions;an optical-to-electrical power converter located in said at least one power receiving apparatus, and ...

AIR COOLED LASER SYSTEMS USING OSCILLATING HEAT PIPES

Provided are air cooled laser systems, such as portable air cooled laser systems, and methods of operating thereof. An air cooled laser system includes an oscillating heat pipe having one end thermally coupled to one or more laser diodes and the other end being air cooled. The oscillating heat pipe has an extremely high thermal conductivity (e.g., much higher than that of copper) which allows using ambient air for cooling. This air cooling aspect reduces the size, weight, and complexity of the system. Furthermore, the air cooling aspect reduces power consumption since no power is used for liquid circulation. To enhance air-cooling characteristics, the end of the oscillating heat pipe away from the diodes may be thermally coupled to one or more heat dissipating fins. Furthermore, the system may be equipped with a blower for controlling the flow of air around that end. 1. An air cooled laser system comprising: 'wherein the oscillating heat pipe has a highest heat transfer coefficient in a direction between the first end and the second end; and', 'an oscillating heat pipe looping between a first end and a second end opposite of the first end,'} wherein the laser diode is disposed on and thermally coupled to the first end of the oscillating heat pipe, and', 'wherein the second end of the oscillating heat pipe is air cooled., 'a laser diode operable as a light source,'}2. The air cooled laser system of claim 1 , further comprising one or more heat dissipating fins disposed on and thermally coupled to the second end of the oscillating heat pipe providing air cooling to the second end of the oscillating heat pipe.3. The air cooled laser system of claim 2 , further comprising a blower configured to generate an air flow around the one or more heat dissipating fins.4. The air cooled laser system of claim 3 , further comprising a temperature sensor configured to measure a temperature of the first end of the oscillating heat pipe or a temperature of the laser diode claim 3 , ...

SOLID LASER AMPLIFICATION DEVICE

This solid laser amplification device has: a laser medium part that has a solid medium, into which a laser light enters from an entrance part and from which the laser light (L) is emitted to the outside from an exit part, and an amplification layer, which is provided on the surface of the medium, receives the laser light in the medium, and amplifies and reflects said light toward the exit part; a microchannel cooling part that cools the amplification layer; and a thermally conductive part that is provided so as to make contact between the amplification layer and the cooling part and transfers the heat of the amplification layer to the cooling part. 1. A solid laser amplification device comprising:a laser medium part which has a solid medium, into which a laser light enters from an entrance part and from which the laser light is emitted from an exit part to the outside, and an amplification layer which is provided on a surface of the medium, receives the laser light in the medium, and amplifies and reflects the laser light toward the exit part;a microchannel type cooling part which cools the amplification layer; anda thermally conductive part which is provided in contact with the amplification layer and the cooling part between the amplification layer and the cooling part and transfers heat of the amplification layer to the cooling part.2. The solid laser amplification device according to claim 1 , wherein the amplification layer claim 1 , the thermally conductive part claim 1 , and the cooling part are provided on each of the opposite surfaces of the medium.3. The solid laser amplification device according to claim 2 , wherein a plurality of the cooling parts and a plurality of the thermally conductive parts are provided at predetermined intervals along a traveling direction of the laser light.4. The solid laser amplification device according to claim 1 , wherein the thermally conductive part is a graphite sheet claim 1 , a surface on one side of the thermally ...

SOLID LASER AMPLIFICATION DEVICE

A solid laser amplification device having a laser medium that has a solid medium, into which a laser light enters and from which the laser light is emitted, and an amplification layer, provided on the surface of the medium, receives the laser light in the medium, and amplifies and reflects the light toward the exit; and a microchannel cooling part that has a plurality of cooling pipelines, into which a cooling solvent is conducted and which are arranged parallel to the surface of the amplification layer, and a cooling surface, at the outer periphery of the cooling pipelines and attached on the surface of the amplification layer, the microchannel cooling part cooling the amplification layer. The closer the position of the cooling pipeline to a position facing a section of the amplification layer that receives the laser light, the greater the cooling force exhibited by the cooling part. 1. A solid laser amplification device comprising:a laser medium part which has a solid medium, into which a laser light enters from an entrance part and from which the laser light is emitted from an exit part to the outside, and an amplification layer which is provided on a surface of the medium, receives the laser light in the medium, and amplifies and reflects the laser light toward the exit part; anda microchannel type cooling part which has a plurality of cooling pipelines, through which a cooling solvent passes and which are arranged in a direction parallel to a surface of the amplification layer, and a cooling surface which is provided at an outer periphery of the plurality of cooling pipelines and mounted on the surface of the amplification layer, and cools the amplification layer,wherein in the cooling part, a cooling power increases as it goes toward the cooling pipeline provided at a position closer to a position facing a place receiving the laser light, of the amplification layer.2. The solid laser amplification device according to claim 1 , wherein in the cooling part claim ...

LED PUMPED LASER DEVICE AND METHOD OF USE

The present invention provides an apparatus and method for pumping solid-state lasers and amplifiers. More specifically, to a method and apparatus for pumping solid-state lasers and amplifiers using Light Emitting Diode (LED) arrays. In one embodiment, the apparatus comprises a gain medium, a plurality of LEDs in optical communication with the gain medium to excite the gain medium, the plurality of LEDs arranged in an LED array, a driving circuit to energize the LED array, and a thermoelectric cooler to reduce the temperature of the LED array, wherein the gain medium is pumped by the LED array to emit a laser light. 1. A solid-state laser device , comprising:a solid state gain medium;a plurality of LEDs in optical communication with the solid state gain medium to excite the solid-state gain medium, the plurality of LEDs arranged in an LED array comprising at least one row of LEDs, the LED array spaced a predetermined distance from the solid state gain medium;a driving circuit to energize the LED array; anda cooler to reduce the temperature of the LED array;wherein the solid state gain medium is pumped by the LED array to emit a laser light.2. The device of claim 1 , wherein the solid-state gain medium comprises active ions selected from the group consisting of Ce claim 1 , Nd claim 1 , Ce claim 1 , Yb claim 1 , Ce claim 1 , Er claim 1 , Pr claim 1 , Ti claim 1 , and Cr.3. The device of claim 1 , wherein the LED array comprises semi-polar LEDs.4. The device of claim 1 , wherein the LED array further comprises a plurality of columns of LEDs.5. The device of claim 1 , further comprising a cryogenically-cooled amplifier module.6. The device of claim 1 , wherein the driving circuit outputs square electrical current pulses to energize the LED array.7. The device of claim 1 , wherein the cooler is mounted to a back surface of the LED array.8. The device of claim 1 , wherein the cooler is a microchannel cooling device interconnected to a rear surface of the LED array.9. The ...

Compact environmentally isolated cylindrical platform for optical components

A compact, environmentally isolated platform for mounting optical components, comprising a plurality of similarly shaped substantially flat plates, an enclosing structural element, and an interior structural element. The similarly shaped substantially flat plates define planes generally parallel to each other. The enclosing structural element is shaped to generally contain the plurality of similarly shaped substantially flat plates with an interior surface shaped to accommodate the perimeters of the plurality of similarly shaped substantially flat plates, and surrounds the perimeters of the plurality of similarly shaped substantially flat plates. The interior structural element passes through or connecting at least two of the plurality of similarly shaped substantially flat plates to provide structural support.

HIGH-GAIN SINGLE PLANAR WAVEGUIDE (PWG) AMPLIFIER LASER SYSTEM

A system includes a master oscillator configured to generate a first optical beam and a beam controller configured to modify the first optical beam. The system also includes a PWG amplifier configured to receive the modified first optical beam and generate a second optical beam having a higher power than the first optical beam. The second optical beam has a power of at least about ten kilowatts. The PWG amplifier includes a single laser gain medium configured to generate the second optical beam. The system further includes a feedback loop configured to control the master oscillator, PWG amplifier, and beam controller. The feedback loop includes a laser controller. The laser controller may be configured to process wavefront information or power in bucket information associated with the second optical beam to control an adaptive optic or perform a back-propagation algorithm to provide wavefront correction at an output of the PWG amplifier. 1. A method comprising:generating a first optical beam using a master oscillator;modifying the first optical beam using a beam controller;amplifying the modified first optical beam to generate a second optical beam using a planar waveguide (PWG) amplifier, the second optical beam having a higher power than the first optical beam; andcontrolling the master oscillator, the PWG amplifier, and the beam controller using a feedback loop that comprises a laser controller;wherein the second optical beam has a power of at least about ten kilowatts and is generated using a single laser gain medium in the PWG amplifier.2. The method of claim 1 , wherein the single laser gain medium lies within a single amplifier beamline of a laser system.3. The method of claim 1 , wherein modifying the first optical beam using the beam controller comprises at least one of:pre-distorting the first optical beam to at least partially compensate for distortions created within the PWG amplifier; andperforming two-axis tip/tilt alignment control.4. The method of ...

SYSTEM AND METHOD FOR COOLING A LASER GAIN MEDIUM USING AN ULTRA-THIN LIQUID THERMAL OPTICAL INTERFACE

A heat sink for cooling a laser gain medium includes a coolant channel, an inlet pore, an outlet pore, and a thermal optical interface (TOI) channel. The coolant channel is configured to receive a coolant for removing heat from the heat sink. The TOI channel is coupled to the coolant channel by the inlet pore and the outlet pore. The TOI channel is configured to receive a portion of the coolant through the inlet pore. The received portion forms an ultra-thin liquid TOI. The TOI channel is further configured to return a portion of the TOI through the outlet pore to the coolant channel. 1. A heat sink for cooling a laser gain medium , the heat sink comprising:a coolant channel configured to receive a coolant for removing heat from the heat sink;an inlet pore;an outlet pore; and the TOT channel is configured to receive at least a portion of the coolant through the inlet pore,', 'the received portion forms an ultra-thin liquid TOI,', 'the TOI channel is further configured to return at least a portion of the TOI through the outlet pore to the coolant channel, and', 'the TOT channel is disposed between a surface of the heat sink and a surface of the laser gain medium such that the surface of the heat sink and the surface of the laser gain medium form substantially parallel walls of the TOT channel., 'a thermal optical interface (TOI) channel coupled to the coolant channel by the inlet pore and the outlet pore, wherein2. The heat sink of claim 1 , wherein the heat sink does not contact the laser gain medium between the inlet port and the outlet port.3. The heat sink of claim 1 , wherein the coolant and the TOI comprise an optically transparent liquid.4. The heat sink of claim 1 , wherein the TOI channel comprises a thickness of about 1-10 μm.5. The heat sink of claim 1 , wherein the inlet pore comprises a plurality of input pores and the outlet pore comprises a plurality of output pores.6. The heat sink of claim 1 , wherein the heat sink further comprises a plurality of ...

High-Power Ytterbium Doped Calcium Fluoride Mode-Locked Laser and Methods of Use

A high-power ytterbium-doped calcium fluoride laser system is disclosed herein which includes at least one pump source, at least one laser cavity formed by at least one high reflector and at least one output coupler, and at least one ytterbium-doped calcium fluoride optical crystal positioned within the laser cavity in communication with the pump source, the ytterbium-doped calcium fluoride optical crystal configured to output at least one output signal of at least 20 W, having a pulse width of 200 fs or less, and a repetition rate of at least 40 MHz. 1. A high-power ytterbium-doped calcium fluoride laser system , comprising:at least one pump source;at least one laser cavity formed by at least one high reflector and at least one output coupler;at least one ytterbium-doped calcium fluoride optical crystal positioned within the at least one laser cavity, the at least one ytterbium-doped calcium fluoride optical crystal in communication with and pumped by the at least one pump signal and configured to output at least one output signal having a output power of 20 W or more and pulse width of 200 fs of less.2. The high-power ytterbium-doped calcium fluoride laser system of wherein the at least one pump signal comprises a continuous wave pump signal.3. The high-power ytterbium-doped calcium fluoride laser system of wherein the at least one output signal comprises a continuous wave mode-locked signal.4. The high-power ytterbium-doped calcium fluoride laser system of wherein the at least one pump source comprises multiple laser diode emitters located within a single diode package coupled to a single fiber optic device claim 1 , each emitter configured to output an optical signal into the single fiber optic device claim 1 , the single fiber optic device configured to receive the optical signals from the multiple laser diode emitters and output a single pump signal.5. The high-power ytterbium-doped calcium fluoride laser system of further comprising at least one at least one ...

Laser amplifier module

A fluid-cooled laser amplifier module ( 100 ) is disclosed which comprises: a casing; a plurality of slabs ( 110 ) of optical gain medium oriented in parallel in the casing for cooling by a fluid stream ( 154, 156 ); a polarisation rotator ( 120 ) disposed between a first group of one or more slabs ( 111 ) of the optical gain medium and a second group of one or more slabs ( 112 ) of the optical gain medium; optical windows ( 150, 152 ) for receiving an input beam or pulse ( 130 ) for amplifying by the slabs and for outputting the amplified beam or pulse ( 140 ); and fluid stream ports ( 155, 157 ) for receiving and discharging the fluid stream for cooling the slabs.

Solid-State Laser

A solid-state laser arrangement includes a plate-like solid body including a laser-active medium, a heat sink, a layer of adhesive between a carrier face of the heat sink and the plate-like solid body, and a reflective coating on a side of the plate-like solid body facing the adhesive layer, in which the adhesive layer is completely shielded from radiation from the plate-like solid body by a radiation-impermeable region between the side of the plate-like solid body facing the adhesive layer and the carrier face of the heat sink.

Solid-State Laser Arrangement

A solid-state laser arrangement, including a plate-like solid body with a laser-active medium, in which the plate-like solid body includes an upper side, a lower side and a circumferential peripheral face, and/or in which a heat sink thermally coupled to the lower side of the plate-like solid body, in which the plate-like solid body includes a scatter region on the upper side and/or on the peripheral face, and the peripheral face of the plate-like solid body includes a portion inclined relative to the upper side and the lower side. 1. A solid-state laser arrangement , comprising:a plate-like solid body with a laser-active medium, wherein the plate-like solid body comprises an upper side, a lower side and a circumferential peripheral face; anda heat sink thermally coupled to the lower side of the plate-like solid body,wherein the plate-like solid body comprises a scatter region on the upper side and/or on the peripheral face, and/or wherein the peripheral face of the plate-like solid body comprises a portion inclined relative to the upper side and the lower side.2. The solid-state laser arrangement according to claim 1 , wherein the scatter region is a roughened face.3. The solid-state laser arrangement according to claim 1 , wherein the inclined portion extends from the upper side to the lower side of the plate-like solid body.4. The solid-state laser arrangement according to claim 1 , wherein an inclination angle (α) of the inclined portion is constant along the peripheral face.5. The solid-state laser arrangement according to claim 4 , wherein the angle of inclination (α) is between 5° and 40°.6. The solid-state laser arrangement according to claim 1 , wherein recesses are on the peripheral face claim 1 , the recesses extending from an outer edge of the lower side of the plate-like solid body in a direction towards an outer edge of the upper side of the plate-like solid body.7. The solid-state laser arrangement according to claim 6 , wherein the recesses divide ...

Monolithic Mode-Locked Laser

A monolithic laser cavity () for generating an output series of pulses () based on an input pump signal . This is achieved by a novel cavity design that utilizes a transparent, low-loss, and near zero-dispersion spacer () to form an optical resonator without the use of wave-guiding effects. The pulse forming material (), optical elements (-), and the laser gain medium () are in direct contact with the spacer and/or each other without any free-space sections between them. Therefore, the light inside the laser cavity never travels through free space. 1. A monolithic laser cavity for generating an output series of pulses with an input pump signal comprising:a spacer formed of a solid material which is optically transparent at desired frequencies;a solid laser gain medium affixed to the spacer with no gas or vacuum gap between the spacer and the gain medium;a solid pulse forming material affixed to the spacer with no gas or vacuum gap between the spacer and the pulse forming medium; andoptics for confining a laser beam at the desired frequencies within the cavity substantially without waveguiding.2. The laser cavity of formed in a linear cavity configuration wherein the optics comprise a partially transparent input mirror for introducing the input pump signal affixed to the spacer with no gas or vacuum gap between the spacer and the input mirror and a partially transparent output mirror for transmitting the output series of pulses affixed to the spacer with no gas or vacuum gap between the spacer and the input mirror.3. The laser cavity of formed in a ring cavity configuration wherein the optics are affixed to the spacer with no gas or vacuum gap between the spacer and the optics.4. The laser cavity of wherein the pulse forming material is affixed to the gain medium and the gain medium is disposed between the pulse forming material and the spacer.5. The laser cavity of wherein the pulse forming material comprises a semiconductor saturable absorber.6. The laser cavity of ...

SYSTEM FOR OPTICAL WIRELESS POWER SUPPLY

A system incorporating safety features, for optical power transmission to receivers, comprising an optical resonator having end reflectors and a gain medium, a driver supplying power to the gain medium, and controlling its small signal gain, a beam steering apparatus and a controller to control at least the beam steering apparatus and the driver. The controller responds to a safety risk occurring in the system, by outputting a command to change at least some of the small signal gain of the gain medium, the radiance of the optical beam, the power supplied by the driver, the scan speed or the scan direction and position of the beam steering apparatus, or to register the scan pose which defines the location of said optical-to-electrical power converter. The controller may also ensure a high overall radiance efficiency, and may warn of transmitted power not received by a targeted receiver. 2. The system according to wherein said indication of a safety risk occurring in the system is obtained at least from said signal generated by said detector configured to provide a signal indicative of said optical beam impinging on said optical-to-electrical power converter claim 1 , and from a signal generated by the level received at said resonator of said beam reflected from said at least one power receiving apparatus.3. The system according to claim 1 , further including a power sensor disposed such that it provides a signal indicative of the power carried by said optical beam before impingement on said at least one power receiving apparatus.4. The system according to wherein said driver is configured to reduce said small signal gain of said gain medium when said power indication of said power sensor exceeds a threshold.5. The system according to wherein said detector also provides a signal indicative of the power received by said at least one power receiving apparatus.6. The system according to wherein at least one of said indications of safety comes from a difference between ...

LIQUID COOLED LASER OPTICAL BENCH FOR THERMAL POINTING STABILITY

A system and method for liquid cooling an optical bench to provide for thermal stability. The liquid cooled bench may optionally be chilled with a cold plate. In some cases, individual components which generate excess heat contain circulating fluid connected to a network of channels within the optical bench to provide for cooling and even distribution of liquid flow and temperature. 1. A liquid cooled bench , comprising:a bench having machined fluid channels therein;a pump for controlling and adjusting a flow of a coolant within the fluid channels;one or more liquid cooled optical mounts for utilizing the coolant from the fluid channels in the bench;one or more temperature sensors for monitoring thermal gradients across the bench; andone or more pressure sensors for monitoring pressure gradients across the bench.2. The liquid cooled bench according to claim 1 , wherein the fluid channels are parallel.3. The liquid cooled bench according to claim 1 , further comprising one or more check valves.4. The liquid cooled bench according to claim 1 , wherein a 2.5 degree or less temperature gradient is maintained.5. The liquid cooled bench according to claim 1 , wherein the coolant is a polyalphaolefin.6. The liquid cooled bench according to claim 1 , further comprising one or more quick disconnect fittings between the fluid channels and the one or more liquid cooled optical mounts.7. The liquid cooled bench according to claim 1 , further comprising one or more leak detectors.8. The liquid cooled bench according to claim 1 , wherein a 3.5 psi pressure differential or less is maintained.9. The liquid cooled bench according to claim 1 , wherein the one or more liquid cooled optical mounts are for laser rods and provide for thermal pointing stability of an optical system.10. A method of designing an optical cooling bench claim 1 , comprising:a bench having machined fluid channels therein;a pump for controlling and adjusting a flow of a coolant within the fluid channels;one or ...

LASER APPARATUS

A laser apparatus that can generate a high-quality laser beam is provided. The laser apparatus is provided with a laser medium and an insulation layer. The laser medium has a first surface and a second surface. Incident laser light is incident on the first surface. The second surface totally reflects the incident laser light that is incident to the second surface at an incident angle equal to or larger than a critical angle. The insulation layer covers a second area of the second surface that surrounds a first area of the second surface, the first area totally reflecting the incident laser light. The laser medium is exposed in the first area. 1. A laser apparatus comprising:a laser medium having a first surface on which incident laser light is incident and a second surface; andan insulation layer,wherein the second surface is configured to totally reflect the incident laser light that is incident to the second surface at an incident angle equal to or larger than a critical angle,wherein the insulation layer is configured to cover a second area of the second surface that surrounds a first area of the second surface, the first area totally reflecting the incident laser light, andwherein the laser medium is exposed in the first area.2. The laser apparatus according to claim 1 , further comprising:a cooling device configured to cool the laser medium by injecting a jet toward the first area of the second surface.3. The laser apparatus according to claim 1 , further comprising:an incident laser light generator configured to generate the incident laser light; anda pump light generator configured to generate pump light to be irradiated to the first area of the laser medium.4. The laser apparatus according to claim 3 , further comprising:an optical device configured to make the pump light be incident on the laser medium with a same optical axis as the incident laser light.5. The laser apparatus according to claim 1 ,wherein a thickness of the insulation layer is equal to or ...

COMPACT MODE-LOCKED LASER MODULE

Apparatus and methods for producing ultrashort optical pulses are described. A high-power, solid-state, passively mode-locked laser can be manufactured in a compact module that can be incorporated into a portable instrument. The mode-locked laser can produce sub-50-ps optical pulses at a repetition rates between 200 MHz and 50 MHz, rates suitable for massively parallel data-acquisition. The optical pulses can be used to generate a reference clock signal for synchronizing data-acquisition and signal-processing electronics of the portable instrument. 1. A mode-locked laser module comprising:a base chassis;a mode-locked laser having a laser cavity assembled on the base chassis; anda gain medium located in the laser cavity that exhibits a positive thermal lensing value between one diopter and 15 diopters when the mode-locked laser is producing optical pulses.2. The mode-locked laser module of claim 1 , further comprising a laser diode arranged to excite the gain medium with a pump beam claim 1 , wherein absorption of the pump beam in the gain medium causes the thermal lensing.3. The mode-locked laser module of claim 1 , wherein the gain medium comprises a solid state crystal that is disposed in a mount and has no active cooling.4. The mode-locked laser module of claim 2 , wherein the mode-locked laser produces optical pulses stably without mechanical adjustments to the laser cavity for thermal lensing values varied over a range from 8 diopters to 12 diopters due to changes in optical power of the pump beam.5. The mode-locked laser module of claim 2 , wherein the mode-locked laser produces optical pulses stably for thermal lensing values varied over a range from one diopter to 15 diopters due to changes in optical power of the pump beam.6. The mode-locked laser module of claim 5 , wherein the changes in the optical power of the pump beam are between 2 Watts and 10 Watts and an average output optical power from the mode-locked laser module is between 350 milliwatts and 3. ...

OPTICAL ARRANGEMENTS WITH DISK-SHAPED LASER-ACTIVE MEDIUMS

Disclosed are optical arrangements including: a disk-shaped laser-active medium, a deflecting device, having a plurality of mirror elements on which mirror faces for deflecting a laser beam are formed, and having a base body on which the mirror elements are fastened, the mirror faces of the mirror elements being oriented in such a way that the laser beam is deflected by a respective mirror face via the disk-shaped laser-active medium to another mirror face. The mirror elements are formed in one piece or are monolithically joined, and have a connecting section that is formed rotationally symmetrically with respect to a center axis and is rigidly connected by a material-fit connection or a direct connection to the base body. 1. An optical arrangement , comprising:a disk-shaped laser-active medium; anda deflecting device, comprising a plurality of mirror elements on which a plurality of mirror faces for deflecting a laser beam are formed, and comprising a base body on which the plurality of mirror elements are fastened, the plurality of mirror faces of the plurality of mirror elements being oriented in such a way that the laser beam is deflected by a respective mirror face of the plurality of mirror faces via the disk-shaped laser-active medium to another mirror face of the plurality of mirror faces,wherein the plurality of mirror elements are formed in one piece or are monolithically joined, and have a connecting section that is formed rotationally symmetrically with respect to a center axis and is rigidly connected by a material-fit connection or a direct connection to the base body.2. The optical arrangement of claim 1 , wherein planar mirror faces of the plurality of mirror elements are oriented at an angle of between 30° and 60° with respect to the center axis of the connecting section.3. The optical arrangement of claim 1 , wherein for a first mirror element a first mirror face is oriented at a first angle with respect to the center axis of the connecting section ...

Solid-state laser device and photoacoustic measurement device

Disclosed are a solid-state laser device having an advantage of achieving simplification of a configuration and reduction in size, and a photoacoustic measurement device. In a solid-state laser device which accommodates a solid-state laser medium and an excitation light source having a rod-shaped portion, the excitation light source is provided to be pulled out of a laser chamber. An optical element which bends light is provided at a position separated from the rod-shaped portion such that at least a part of the optical element and at least a part of the rod-shaped portion are at the same position in the longitudinal direction of the rod-shaped portion. One resonator mirror is disposed at a position where bent light is incident. Optical components between the optical element and the resonator mirror are provided at positions separated from a path along which the excitation light source is pulled out.

Stress-optimized laser disk mounting systems

This disclosure relates to laser disk mounting systems and methods. The laser disk mounting systems comprise a disk module with a round disk-shaped heat sink having a front side, a rear side, and an edge surface connecting the front side and the rear side, and a laser disk arranged on the front side of the heat sink, and a radial mounting device with an opening for receiving the disk module, wherein the disk module is mounted in the radial mounting device such that a force action is applied in radial direction on the edge surface.

Laser Machining Device And Laser Oscillator

To prevent an output decrease of laser light due to impurities formed in a Q switch. A laser machining device includes a Q-switch housing section configured by housing a Q switch and a first mirror and a wavelength converting section including a housing in which a transmission window section capable of transmitting a fundamental wave is formed, the wavelength converting section being configured by airtightly housing, with an internal space surrounded by the housing, at least a first wavelength conversion element, a second wavelength conversion element, and a second mirror. A resonator forming a resonant optical path passing through the transmission window section is configured by the first mirror in the Q-switch housing section and the second mirror in the wavelength converting section. 1. A laser machining device comprising:an excitation-light generating section configured to generate excitation light;a laser-light output section configured to generate laser light on the basis of the excitation light generated by the excitation-light generating section and emit the laser light;a laser-light scanning section configured to irradiate the laser light emitted from the laser-light output section on a workpiece and scan the laser light on a surface of the workpiece; anda control section configured to perform machining of the workpiece by controlling the excitation-light generating section, the laser-light output section, and the laser-light scanning section, wherein a laser medium configured to generate a fundamental wave on the basis of the excitation light generated by the excitation-light generating section;', 'a Q switch configured to pulse-oscillate the fundamental wave generated by the laser medium on the basis of a control signal input from the control section;', 'a first mirror for reflecting the fundamental wave generated by the laser medium;', 'a Q-switch housing section including an incident section on which the excitation light generated by the excitation- ...

Laser Machining Device And Laser Machining Method

To appropriately change an output of laser light without deteriorating laser characteristics. A control section of a laser machining device controls, when a target output is larger than a predetermined threshold, an output of laser light by changing a driving current supplied to an excitation light source and, on the other hand, controls, when the target output is equal to or smaller than the threshold, the output of the laser light by changing a duty ratio of a Q switch while keeping the driving current supplied to the excitation light source substantially fixed. 1. A laser machining device comprising:an excitation-light generating section configured to generate excitation light;a laser-light output section configured to generate laser light on the basis of the excitation light generated by the excitation-light generating section and emit the laser light;a laser-light scanning section configured to scan the laser light emitted from the laser-light output section on a surface of a workpiece;a condition-setting storing section configured to store machining conditions set to perform desired machining on the workpiece; anda control section configured to perform machining of the workpiece by controlling the excitation-light generating section, the laser-light output section, and the laser-light scanning section on the basis of the machining conditions stored in the condition-setting storing section, wherein a laser medium configured to generate a fundamental wave on the basis of the excitation light generated by the excitation-light generating section;', 'a first wavelength conversion element on which the fundamental wave generated by the laser medium is made incident, the first wavelength conversion element generating a second harmonic having a frequency higher than a frequency of the fundamental wave;', 'a second wavelength conversion element on which the second harmonic generated by the first wavelength conversion element is made incident, the second wavelength ...

Laser system with mechanically-robust monolithic fused planar waveguide (pwg) structure

An apparatus includes a PWG having a core region and a cladding layer. The amplifier is configured to receive pump light. The core region is configured to amplify an input beam using energy from the pump light to generate an amplified output beam. The apparatus also includes a cooling fluid configured to cool the core region. The cooling fluid has a lower refractive index than the core region and the cladding layer in order to support guiding of the input beam and pump light within the amplifier. The amplifier also includes first and second endcaps attached to opposite faces of the core region and cladding layer. The core region, cladding layer, and endcaps collectively form a monolithic fused structure. Each endcap has a major outer surface that is larger in area than a combined area of the faces of the core region and cladding layer to which the endcap is attached.

LARGE APERTURE UNIFORM-AMPLIFICATION LASER MODULE

A large aperture uniform-amplification laser module including a longer, larger diameter crystal bar is disclosed. The laser module includes a ring-shaped pump bar structure, a crystal bar, a glass sleeve, and a structural component. The pump bar structure includes pump blocks composed of a bar, a cooling heat sink, and a cooling pipe. The bar is connected with the heat sink, and a cooling water channel is provided inside of the cooling heat sink. Heat sinks are provided with outlet pipes and an inlet pipes to communicate with water channels, which are connected in series through the cooling pipes to form a ring shape. The bar is close to a center axis of the ring-shaped pump bar structure. The crystal bar is provided in the glass sleeve. A plurality of the ring-shaped pump bar structures are sleeved on the glass sleeve along the length of the glass sleeve. 1. A large aperture uniform-amplification laser module , comprising:a ring-shaped pump bar structure;a crystal bar;a glass sleeve;a structural component,wherein the pump bar structure comprises a plurality of pump blocks, and each pump block is composed of a bar, a cooling heat sink, and a cooling pipe, wherein the bar is connected with the cooling heat sink, and a cooling water channel is provided inside of the cooling heat sink, wherein two of the cooling heat sinks are respectively provided with an outlet pipe and an inlet pipe which are communicated with the cooling water channel, wherein from the cooling heat sink provided with the inlet pipe to the cooling heat sink provided with the outlet pipe, a plurality of the cooling water channels are connected in series through a plurality of the cooling pipes and form a ring shape, wherein the bar is close to a center axis of the ring-shaped pump bar structure,wherein the crystal bar is provided in the glass sleeve, wherein a plurality of the ring-shaped pump bar structures with the same diameter or different diameters are sleeved on the glass sleeve along the ...

Multi-stage Optical Fiber Amplifier

The present disclosure relates to a fiber encapsulation mechanism for energy dissipation in a fiber amplifying system. One example embodiment includes an optical fiber amplifier. The optical fiber amplifier includes an optical fiber that includes a gain medium, as well as a polymer layer that at least partially surrounds the optical fiber. The polymer layer is optically transparent. In addition, the optical fiber amplifier includes a pump source. Optical pumping by the pump source amplifies optical signals in the optical fiber and generates excess heat and excess photons. The optical fiber amplifier additionally includes a heatsink layer disposed adjacent to the polymer layer. The heatsink layer conducts the excess heat away from the optical fiber. Further, the optical fiber amplifier includes an optically transparent layer disposed adjacent to the polymer layer. The optically transparent layer transmits the excess photons away from the optical fiber. 1. A multi-stage optical fiber amplifier , comprising: a single-clad optical fiber comprising a gain medium; and', 'a first pump diode arranged to optically pump the single-clad optical fiber, wherein optically pumping the single-clad optical fiber amplifies optical signals in a wavelength range transmitted through the gain medium of the single-clad optical fiber;, 'a first stage, comprising a dual-clad optical fiber comprising a gain medium, wherein the dual-clad optical fiber is optically coupled to the single-clad optical fiber at a fusion splice and arranged to receive optical signals from the single-clad optical fiber; and', 'a second pump diode arranged to optically pump the dual-clad optical fiber, wherein optically pumping the dual-clad optical fiber amplifies optical signals in the wavelength range transmitted through the gain medium of the dual-clad optical fiber; and, 'a second stage, comprisingan optically isolating section, wherein the optically isolating section is configured to prevent reverse ...

SOLID-STATE LASER DEVICE

A solid-state laser device includes: a first water tank which houses a laser rod and a lamp and into which coolant is introduced; an outer inlet which is provided in a member forming a chamber and through which coolant is received into the chamber; and an outer outlet provided in said member and through which a coolant is discharged to the outside of the chamber. The solid-state laser device further includes: two second water tanks that house electrodes of both ends of the lamp, respectively, and communicate with the first water tank; a coolant inflow passage of which one end communicates with the outer inlet and the other end forms inner inlets opened to only the second water tanks; and a coolant outflow passage of which one end communicates with the outer outlet and the other end forms an inner outlet opened to the first water tank. 1. A solid-state laser device comprising:a rod-like laser rod;a laser rod pumping lamp that is formed in the shape of a straight pipe, includes electrode portions provided at both ends thereof, and is disposed in a state in which a major axis of the lamp and a major axis of the laser rod are parallel to each other and the lamp lines up with the laser rod with a gap;a chamber that houses the laser rod and the lamp;a first water tank portion which houses at least a part of each of the laser rod and the lamp and into which a coolant is introduced;an outer inlet portion which is provided in a member forming the chamber at a position on the side of the laser rod opposite to the lamp and through which a coolant is received into the chamber;an outer outlet portion which is provided in the member forming the chamber at a position on the side of the laser rod opposite to the lamp and through which a coolant is discharged to the outside of the chamber;two second water tank portions that house the electrode portions of both the ends of the lamp, respectively, and communicate with the first water tank portion;a coolant inflow passage of which one ...

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 system for transferring a material from a first object to a second object , comprising: a slab crystal comprising a front side, a back side, a top side, a bottom side, a left side, and a right side, wherein said back side is at least partially mirrored and wherein said slab crystal is configured to receive a seed laser beam into the front side, and also configured to emit an amplified laser beam from said front side, and', 'a pumping light source providing light energy to the slab crystal to amplify said seed laser beam in said slab crystal;, 'a laser device comprisinganda laser routing subsystem configured to direct the amplified laser beam to vaporize a portion of the first product to deposit a part of the vaporized portion on or in the second object.2. The system of claim 1 , further comprising a cavity filter material provided on at least one side of the slab crystal to receive light energy from the pumping light source claim 1 , such that the cavity filter material converts light energy received at a first frequency band into light energy at ...

METHOD AND APPARATUS FOR ENSURING A UNIFORM TEMPERATURE PROFILE IN RIBBON FIBER LASERS AND AMPLIFIERS

A uniform temperature profile is provided across the width of the core of a ribbon fiber laser or amplifier by the use of insulating elements at the core edges and a spatially variable gain in the fiber core. High average power ribbon fibers, enable a variety of applications such as practical laser cutting and beam combining. 1. A ribbon fiber , comprising:a core including a rare earth dopant and having a length and further including an aspect ratio that is orthogonal to said length, wherein said aspect ratio comprises a long aspect that is orthogonal to a relatively shorter aspect, wherein the concentration of said rare earth dopant varies across said long aspect, wherein said long aspect spans a first edge of said core and a second edge of said core;means for guiding light within said core; andone or more heat insulating elements configured for flattening the thermal profile of said core.2. The ribbon fiber of claim 1 , wherein said one or more heat insulating elements are configured for flattening said thermal profile of said core along said long aspect while said light is guided within said core.3. The ribbon fiber of claim 1 , wherein said one or more heat insulating elements comprises at least a first heat insulating element or a second heat insulating element claim 1 , wherein said first heat insulating element is configured to reduce the amount of heat that can escape from said first edge and wherein said second heat insulating element is configured to reduce the amount of heat that can escape from said second edge.4. The ribbon fiber of claim 3 , wherein said first heat insulating element is not in direct contact with said second heat insulating element.5. The ribbon fiber of claim 3 , wherein said shorter aspect comprises a first side and a second side claim 3 , wherein said first heat insulating element is configured to reduce the amount of heat that can escape from a portion of at least one of said first side and said second side.6. The ribbon fiber of ...

SOLID STATE LASER APPARATUS

A solid state laser apparatus () is provided with a plurality of cold heads (), a cooling apparatus (), laser media () and a seed light source (). The cooling apparatus cools the plurality of cold heads. The plurality of laser media are arranged in contact to each of the plurality of cold heads, amplify an irradiated first laser beam and reflects the first laser beam. The seed light source irradiates a first laser medium (-) of the plurality of laser media with the first laser beam. In addition, the plurality of laser media reflects the first laser beam irradiated to the first laser medium to a laser medium arranged to a cold head different from the cold head where the relevant laser medium is arranged. In addition, the plurality of cold heads cools the plurality of laser media. 1. A solid state laser apparatus comprising:a plurality of cold head including at least three cold heads;a cooling apparatus configured to cool the plurality of cold heads;a plurality of laser media arranged in contact with each of the plurality of cold heads and configured to amplify an irradiated first laser beam and reflect the first laser beam; anda seed light source configured to irradiate a first laser medium of the plurality of laser media with the first laser beam,wherein the plurality of laser media are configured to reflect the first laser beam from one of the plurality of laser media arranged to one of the plurality of cold heads to another one of the plurality of laser media arranged to another one of the plurality of cold heads, andthe plurality of cold heads are configured to cool the plurality of laser media.2. The solid state laser apparatus according to claim 1 , further comprising a reflection surface arranged on a boundary between each of the plurality of laser media and the plurality of cold heads and configured to reflect the first laser beam.31. The solid state laser apparatus according to claim 1 , wherein a thickness of the plurality of laser media is less than or ...

LASER DEVICES UTILIZING ALEXANDRITE LASER OPERATING AT OR NEAR ITS GAIN PEAK AS SHORTER-WAVELENGTH PUMPING SOURCES AND METHODS OF USE THEREOF

In some embodiments, the instant invention provides for a system that includes at least the following components: (i) an Alexandrite laser pumping subsystem; where the Alexandrite laser pumping subsystem is configured to: 1) produce wavelengths between 700 and 820 nm, and 2) produce a pump pulse having: i) a duration between 1 to 10 milliseconds, and ii) an energy measuring up to 100 Joules; where the Alexandrite laser pumping subsystem includes: 1) an optical fiber, and 2) a Lens system, (ii) a Thulium doped Yttrium Aluminum Garnet (Tm:YAG) laser subsystem; where the Tm:YAG laser subsystem includes: 1) a Tm:YAG gain medium, 2) a rod heat sink, and 3) at least one cooling device, (iii) a wavelength selecting device, where the wavelength selecting device is configured to deliver a wavelength between 1.75 microns to 2.1 microns; and where the system is configured to produce a high energy conversion efficiency. 1. A laser system comprising: [{'sup': '3+', '1) an output wavelength substantially within the absorption band of Tm ion containing laser media, preferably between 740 and 820 nm, such pumping sources include alexandrite, Ti:sapphire and certain semi-conductor diode lasers, and'}, {'sup': '3+', '2) an output pulse duration less than, or within a factor of two greater than to the upper state lifetime of Tm ion containing laser media, for Tm doped yttrium almuinum garnet (YAG) the upper state lifetime is approximately 10 ms, and'}, '3) an output energy measuring between 1 and 100 Joules per pulse, and', '4) average output power (pulse energy times pulse rate) between 1 Watt to 100 Watts;, '(i) an optical pumping source having following characteristics 1) at least one optical fiber, and', '2) at least one lens to convey said pump source optical output into the proximal end of said fiber, and', {'sup': '3+', '3) one or more conditioning optics at distal end of said optical fiber, which may include a focusing element such as a lens for converging pump source light ...

Method and system for cryocooled laser amplifier

A laser amplifier system includes a gain medium having a longitudinal axis and a plurality of sides substantially parallel to the longitudinal axis. The laser amplifier system also includes a waveguide having a plurality of inner surfaces. Each of the inner surfaces is optically coupled to one of the plurality of sides of the gain medium. The waveguide also includes a plurality of outer surfaces. The laser amplifier system further includes a cladding optically coupled to the outer surfaces of the waveguide.

System and Device with Laser Array Illumination

A system includes: a heat sink module with a plurality of first through-holes linking its top and bottom surfaces and a plurality of grooves on the bottom surface, wherein each groove passes through a respective sequence of the first through-holes; and a driving circuit module with a plurality of conductive connectors and electrical driving surfaces that are disposed substantially perpendicular to the top and bottom surfaces of the heat sink module, wherein each conductive connector lies partially within a respective groove in the bottom surface of the heat sink module, the conductive connectors include internal connectors that each links at least two of the first through-holes in a respective sequence of first through-holes, and external connectors that each links at least one of the first through-holes in a respective sequence of first through-holes to an electrical driving surfaces of the driving circuit module. 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 through-holes linking the respective top surface and the respective bottom surface of the heat sink module, and', 'the respective bottom surface of the heat sink module includes a plurality of grooves, wherein each groove passes through respective lower portions of a respective sequence of first through-holes among the plurality of first through-holes in the heat-sink module; and, 'a heat sink module, wherein the driving circuit module includes a plurality of conductive connectors, and one or more electrical driving surfaces that are disposed substantially perpendicular to the respective top and bottom surfaces of the heat sink module,', 'each conductive connector lies at least partially within a respective one of the plurality of grooves in the respective bottom surface of the heat sink module,', 'the plurality of conductive connectors include a set of ...

PLANAR WAVEGUIDE LASER PUMPING MODULE AND PLANAR WAVEGUIDE WAVELENGTH CONVERSION LASER DEVICE

A waveguide is constructed by sandwiching a transparent member () and a laser medium () between a first clad - and a second clad -. Pumping light () is made to be incident from a direction perpendicular to a direction of the optical axes of first to fourth laser oscillation light beams - to -, and to alternately propagate through the transparent member () and the laser medium () in a zigzag manner so as to pump only resonator mode regions in the laser medium (). 1. A planar waveguide laser pumping module comprising:a planar laser medium;a planar transparent member that has a refractive index equal to that of said laser medium, and that is joined to a surface of said laser medium;a first clad that has a refractive index smaller than those of said laser medium and said transparent member, and that is joined to a surface opposite to the surface of said transparent member joined to said laser medium;a second clad that has a refractive index smaller than those of said laser medium and said transparent member, that is joined to a surface opposite to the surface of said laser medium joined to said transparent member, and that sandwiches said transparent member and said laser medium between itself and said first clad; anda heat sink that is joined to said laser medium via said second clad,wherein laser oscillations occur on a plurality of optical axes which are arranged at spacings in a planar direction of said laser medium, and pumping light is incident in a direction perpendicular to the optical axes of said laser oscillations, and alternately propagates on the plurality of optical axes of said laser medium and in said transparent member between the adjacent optical axes.2. The planar waveguide laser pumping module according to claim 1 , wherein each of cross sections of said laser medium and said transparent member in a direction perpendicular to the optical axis of said laser oscillation has a trapezoidal shape.3. The planar waveguide laser pumping module according to ...

RADIATION FIELD AMPLIFIER SYSTEM

Radiation field amplifier system for a radiation field with a wave length L comprising a first optical device, a second optical device, an amplifying unit and a heat dissipation system, said radiation field penetrates said first optical device, said amplifying unit and said second optical device in this order and at least one of said optical devices is part of said heat dissipation system, said optical devices act birefringently on said radiation field and said amplifying unit alters a polarization of said radiation field such that a depolarization of said radiation field occurring in said first optical device is essentially compensated by a depolarization of said radiation field occurring in said second optical device. 1. Radiation field amplifier system for a radiation field with a wave length L comprising a first optical device , a second optical device , an amplifying unit and a heat dissipation system ,said radiation field penetrates said first optical device, said amplifying unit and said second optical device in this order and at least one of said optical devices is part of said heat dissipation system, said optical devices act birefringently on said radiation field and said amplifying unit alters a polarization of said radiation field such that a depolarization of said radiation field occurring in said first optical device is essentially compensated by a depolarization of said radiation field occurring in said second optical device.2. Radiation field amplifier system according to claim 1 , wherein said depolarization in at least one of said optical devices is caused by thermal and/or stress induced birefringence in said at least one optical device of said optical devices.3. Radiation field amplifier system according to claim 1 , wherein at least one of said optical devices is rotational symmetric to a main axis in particular to an optical axis of said radiation field amplifier system.4. Radiation field amplifier system according to claim 1 , wherein said ...

RADIATION FIELD AMPLIFIER SYSTEM

Radiation field amplifier system for a radiation field comprising an amplifying unit and a heat dissipation system with one heat spreading element or several heat spreading elements, said one heat spreading element or at least one of said several heat spreading elements of said heat dissipation system is pressed with a contact surface within a contact area against said amplifying unit and said contact surface rises starting from a geometrical reference plane in direction towards said amplifying unit and a distance d between said contact surface and said geometrical reference plane attains its largest value within a central area, which is arranged inside said contact area and said distance d is smaller outside said central area than inside said central area. 1. Radiation field amplifier system for a radiation field comprising an amplifying unit and a heat dissipation system with one heat spreading element or several heat spreading elements , said one heat spreading element or at least one of said several heat spreading elements of said heat dissipation system are pressed with a contact surface within a contact area against said amplifying unit and said contact surface rises starting from a geometrical reference plane in direction towards said amplifying unit and a distance d between said contact surface and said geometrical reference plane attains its largest value within a central area , which is arranged inside said contact area and said distance d is smaller outside said central area than inside said central area.2. Radiation field amplifier system according to claim 1 , wherein said amplifying unit is clamped in between a first and a second heat spreading element of said heat dissipation system.3. Radiation field amplifier system according to claim 1 , wherein a region of penetration of said radiation field passes through said contact area claim 1 , within which said one heat spreading element or one of said several heat spreading elements is pressed against said ...

Direct Diode Pumped Ti:sapphire Lasers and Amplifiers

Direct diode-pumped Ti:sapphire laser amplifiers use fiber-coupled laser diodes as pump beam sources. The pump beam may be polarized or non-polarized. Light at wavelengths below 527 nm may be used in cryogenic configurations. Multiple diode outputs may be polarization or spectrally combined. 1. A system for amplification of ultrafast laser pulses , comprising:a seed source of seed light having spectral components within the Ti:sapphire gain bandwidth of 600-1080 nm;a gain medium comprising a Ti:sapphire crystal; anda diode pump beam source comprising a diode laser emitting within the Ti:sapphire absorption bandwidth of ˜400-600 nm;wherein the diode pump beam is directed into the Ti:sapphire crystal creating a population inversion; andwherein the seed source is passed through the population inversion region of the Ti:sapphire crystal to effect gain.2. The system of claim 1 , further comprising a cooling device for cooling the Ti:sapphire crystal to below 200 K.3. The system of wherein the pump beam wavelength is below 480 nm claim 2 , and wherein the system results in amplification of >1 excited states per absorbed short-wavelength photon.4. The system of wherein the diode pump beam source includes multiple diodes coupled into a multimode fiber optic cable with a numerical aperture below 0.22.5. The system of wherein the fiber optic cable has a fiber core diameter below 230 microns.6. The system of wherein the diode pump beam consists of wavelengths between 435 and 480 nm.7. The system of wherein the diode pump beam source further comprises multiple pump diodes and a polarization combining device for polarization combining beams from the multiple pump diodes8. The system of wherein the diode pump beam source further comprises multiple pump diodes and a spectral combining device for spectrally combining beams from the multiple pump diodes.9. The system of wherein the seed source is a mode-locked Ti:sapphire oscillator.10. The system of claim 1 , further comprising a ...

Tunable Laser With High Thermal Wavelength Tuning Efficiency

A monolithically integrated thermal tunable laser comprising a layered substrate comprising an upper surface and a lower surface, and a thermal tuning assembly comprising a heating element positioned on the upper surface, a waveguide layer positioned between the upper surface and the lower surface, and a thermal insulation layer positioned between the waveguide layer and the lower surface, wherein the thermal insulation layer is at least partially etched out of an Indium Phosphide (InP) sacrificial layer, and wherein the thermal insulation layer is positioned between Indium Gallium Arsenide (InGaAs) etch stop layers.

Laser system enabled by additive manufacturing

A laser frame for holding a plurality of optical components includes a first flexure structure for adjustably holding a first one of the optical components, and a first cellular structure for supporting and cooling a second one of the optical components. The first flexure structure and the first cellular structure are each a unitary structure formed by additive manufacturing. Also, a laser frame for holding an optical component includes a passive cooling cellular structure for supporting and cooling the optical component. The passive cooling cellular structure has a non-uniform density, and the laser frame is a unitary structure formed by additive manufacturing.

SOLID-STATE LASER DEVICE

A solid-state laser device includes an inner container, an outer container, a cooling medium supply unit, and a cover section. The inner container in which a laser medium is accommodated includes an inner light-transmitting unit. An outer light-transmitting unit of the outer container is provided at a part that faces the inner light-transmitting unit and is vacuum-insulated from the inner light-transmitting unit. The cooling medium supply unit supplies a cooling medium so that the cooling medium comes in contact with a surface other than a light input and output surface in the laser medium. The cover section partitions a light-passing area from a cooling medium supply area to which the cooling medium is supplied. 17-. (canceled)8. A solid-state laser device , comprising:a laser medium including a light input and output surface on which at least one of incidence and emission of light occurs on a part of its surface;an inner container in which the laser medium is accommodated and which includes an inner light-transmitting unit configured to transmit incident light incident on the light input and output surface and emission light emitted from the light input and output surface;an outer container in which the inner container is accommodated, and which includes at least an outer light-transmitting unit provided at a part that faces the inner light-transmitting unit, transmitting the incident light and the emission light, and being vacuum-insulated from the inner light-transmitting unit;a cooling medium supply unit configured to supply a cooling medium inside the inner container so that the cooling medium comes in contact with at least a part of a surface other than the light input and output surface in the laser medium, anda cover section that partitions a light-passing area through which the incident light and the emission light between the light input and output surface and the inner light-transmitting unit pass from a cooling medium supply area to which the cooling ...

Mounting vane for optical element of a laser

A mount for an optical element such as in a laser, optical amplifier, or other optical system, is disclosed. The mount is a mounting vane ( 100 ) for cooling the optical element ( 125 ) by a fluid stream. The optical element may be a gain medium generating heat. The mounting vane comprises: an input section with a leading edge ( 110 ) for meeting the fluid stream; a diffuser section ( 130 ) which tapers to a trailing edge ( 135 ); and a Direction of plane section ( 120 ) with an aperture for receiving the optical element ( 125 ) for cooling by the fluid stream, the plane section arranged between the input section and diffuser section, wherein the diffuser section ( 130 ) includes one or more flow guiding fins ( 140 ) protruding from the diffuser section. The mounting vane may be stacked with a plurality of other mounting vanes in a manifold. The shape of the vane plate results in a turbulent fluid flow improving the heat exchange between a laser disc heated by optical pumping and a cryogenic He gas used for cooling.

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.

LASER LIGHT SOURCE AND LASER PROJECTION DEVICE

Embodiments of the present application provide a laser light source and a laser projection device. The laser light source includes a laser assembly, where the laser assembly includes a laser and a circuit board, the laser includes a substrate and a light emitting chip arranged on the substrate, a lateral surface of the substrate is provided with a plurality of pins extending outwards therefrom, the circuit board is arranged on a side where the pins extend, and the circuit board is electrically connected to the pins. The laser light source of the present application features simple assembling and disassembling, reliable performance and relatively low cost. 1. A laser light source , comprising a laser and a laser heat dissipation assembly for dissipating heat from the laser , wherein:the laser is provided with a heat sink on a side facing the laser heat dissipation assembly, the laser heat dissipation assembly comprises a heat conduction layer and a fin module, and the heat sink is in contact with the heat conduction layer;the heat conduction layer comprises at least two heat conduction blocks, with a plurality of thermotubes arranged between adjacent heat conduction blocks, each of the thermotubes comprises a hot end, a cold end, and a bent part connecting the hot end and the cold end, and the hot ends are respectively connected with adjacent heat conduction blocks; andthe fin module comprises a plurality of cooling fins that are parallel to each other, and the cold ends run vertically through the cooling fins, respectively.2. The laser light source according to claim 1 , wherein the heat conduction layer comprises a first heat conduction block and a second heat conduction block claim 1 , and the heat sink is in contact with the first heat conduction block;a first layer of thermotubes are arranged between the first heat conduction block and the second heat conduction block, and hot ends of the first layer of thermotubes are in contact with the first heat conduction ...

METHODS OF OPERATING A 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. 120-. (canceled)21. A method comprising:inputting light into a laser element with a pump source;emitting laser light from the laser element;removing heat from a first liquid flow;removing heat from the pump source with the first liquid flow; andremoving heat from the laser element with a second liquid flow and a portion of the first liquid flow.22. The method of claim 21 , wherein the first and second liquid flows are driven by at least one pump.23. The method of claim 21 , wherein the step of removing heat from the laser element includes driving the second liquid flow and the portion of the first liquid flow into a reservoir.24. The method of claim 23 , wherein the reservoir includes a sensor claim 23 , and wherein the method further comprises:measuring, with the sensor, a temperature of the first and second liquid flows.25. The method of claim 21 , further comprising:measuring a temperature of the second liquid flow; andadding heat to the second liquid flow in response to the temperature so as to maintain a temperature range of the laser element.26. The method of claim 25 , further comprising:modifying a flow rate of the second liquid flow ...

DOWNHOLE GAMMA-RAY GENERATORS AND SYSTEMS TO GENERATE GAMMA-RAYS IN A DOWNHOLE ENVIRONMENT

The disclosed embodiments include downhole gamma-ray generators and methods to utilize downhole gamma-ray generators in a downhole environment. In one embodiment, a downhole gamma-ray generator includes a target foil formed from a first material. The downhole gamma-ray generator also includes a second layer deposited along a back surface of the target foil. The downhole gamma-ray generator further includes a laser system operable to direct optical pulses onto a front surface of the target foil to ionize atoms of the first material, where electrons produced by ionization of the first material propagate through the target foil and decelerates when the electrons interact with the high density material, and where the deceleration of the electrons produces gamma-rays that are utilized to obtain one or more formation properties of a downhole formation. 1. A downhole gamma-ray generator comprising:a target foil formed from a first material;a tunable laser system oriented to direct optical pulses onto a front surface of the target foil to ionize atoms of the first material; anda second layer deposited along a back surface of the target foil.2. The downhole gamma-ray generator of claim 1 , wherein the target foil and the second layer are stored within a housing unit of the downhole gamma-ray generator.3. The downhole gamma-ray generator of claim 2 , wherein the tunable laser system utilizes a chirped pulse amplification technique to amplify the optical pulses.4. The downhole gamma-ray generator of claim 3 , wherein the tunable laser system is operable to adjust at least one of an intensity claim 3 , timing claim 3 , frequency claim 3 , and amplitude of the optical pulses.5. The downhole gamma-ray generator of claim 4 , wherein the tunable laser system utilizes a carbon dioxide laser to generate the optical pulses.6. The downhole gamma-ray generator of claim 4 , wherein the tunable laser system utilizes a titanium sapphire laser to generate the optical pulses.7. The downhole ...

Green laser for display applications

Methods and apparatus for producing high power lasers with reduced speckle are provided. Fiber and solid-state lasers comprising terbium-doped lasing material are provided. Embodiments are described for increasing signal reflection bandwidth, reducing coupling and coherency of spatial modes, and equalizing gain of terbium-doped lasers for use in laser display systems. Spectral selectors are described for generating separate wavelengths within a range of interest for use in 3D laser display systems.

SOLID-STATE LASER SYSTEM

A laser in an embodiment of the present invention is disclosed that includes a laser pump source, a pump-beam coupler (PBC) coupled with the laser pump source, a laser gain medium coupled with the PBC, a second-harmonic generator (SHG) coupled with the laser gain medium; and an output coupler coupled with the SHG. 1. A solid state laser system , comprising:a pump source that includes a wavelength stabilizer that is integrated into the pump source;a laser medium positioned after the pump source, wherein said laser medium comprises Nd:YVO4 having a near uniform Nd3+ doping level between and including approximately 0.2 at. % and 2 at. %;a frequency doubler positioned after the laser medium.2. The laser system of claim 1 , wherein the laser medium has a length in the range between and including 1 mm and 8 mm.3. The laser system of claim 1 , wherein the laser medium has a length of approximately 4 mm.4. The laser system of claim 1 , wherein the frequency doubler is a chirped PPLN.5. The laser system of claim 1 , wherein the frequency doubler is a PPLT SHG crystal.6. The laser system of claim 1 , wherein the frequency doubler is a periodically poled SHG having linearly chirped gratings of at least one of same and different chirp rates.7. A solid state laser system claim 1 , comprising:a laser gain medium;an output coupler positioned after the laser gain medium, wherein the output coupler has a first surface that is coated with an HR, and a second surface that is coated with an AR, wherein the first surface has a radius of curvature of approximately 85 mm, and wherein the output coupler is a plano-concave output coupler.8. The laser system of claim 7 , wherein the output coupler is positioned after the laser gain medium.9. The laser system of claim 7 , further comprising a frequency doubler claim 7 , and wherein the frequency doubler is positioned between the output coupler and the laser medium.10. The laser system of claim 7 , further comprising a frequency doubler claim ...

OPTICALLY PUMPED SEMICONDUCTOR DISK LASER

An optically pumped semiconductor disk laser including a pump light source, at least one semiconductor body (), which semiconductor body () has at least one window region (), an active region () and a reflection device (P), which reflection device has at least one first P-reflection element (P) for the pump wavelength. The first P-reflection element (P) is embodied and arranged such that pump light emerging from the pump light source () can be guided for at least two passes through the active region (). A total thickness of the active region () and of the window region () in the direction of an optical axis of the semiconductor disk laser is less than three times the laser wavelength in the active region (). 122871137. An optically pumped semiconductor disk laser comprising a pump light source , at least one semiconductor body () , said semiconductor body () has at least one window region () , an active region () and a reflection device (P) , said reflection device has at least one first P-reflection element (P) for a pump wavelength , wherein the first P-reflection element (P) is embodied and arranged such that pump light emerging from the pump light source () is guided for at least two passes through the active region () , and{'b': 7', '8', '7, 'a total thickness of the active region () and of the at least one window region () in a direction of an optical axis of the semiconductor disk laser is less than three times a laser wavelength in the active region ().'}27. The optically pumped semiconductor disk laser as claimed in claim 1 , wherein the active region () comprises at least a number of barrier layers and a number of quantum wells claim 1 , and the barrier layers are substantially comprised of GaSb or GaInAsSb or AlGaAsSb or AlGaInAsSb and the quantum wells are substantially comprised of GaInSb or GaInAsSb.3216. The optically pumped semiconductor disk laser as claimed in claim 1 , wherein the reflection device (P) of the semiconductor body () as the first P- ...

Laser devices utilizing alexandrite laser operating at or near its gain peak as shorter-wavelength pumping sources and methods of use thereof

In some embodiments, the instant invention provides for a system that includes at least the following components: (i) an Alexandrite laser pumping subsystem; where the Alexandrite laser pumping subsystem is configured to: 1) produce wavelengths between 700 and 820 nm, and 2) produce a pump pulse having: i) a duration between 1 to 10 milliseconds, and ii) an energy measuring up to 100 Joules; where the Alexandrite laser pumping subsystem includes: 1) an optical fiber, and 2) a Lens system, (ii) a Thulium doped Yttrium Aluminum Garnet (Tm:YAG) laser subsystem; where the Tm:YAG laser subsystem includes: 1) a Tm:YAG gain medium, 2) a rod heat sink, and 3) at least one cooling device, (iii) a wavelength selecting device, where the wavelength selecting device is configured to deliver a wavelength between 1.75 microns to 2.1 microns; and where the system is configured to produce a high energy conversion efficiency.

COOLING SYSTEM FOR ROTORCRAFT LASER SYSTEM

A cooling system for a rotorcraft laser system is provided. The cooling system includes at least one laser carrying component operatively coupling a laser turret and a laser generating assembly. The cooling system also includes at least one fuel line fluidly coupled to a fuel tank containing a fuel. The cooling system further includes a heat exchanger containing a portion of the laser carrying component and the fuel line to transfer heat therebetween to cool the laser carrying component. 1. A cooling system for a rotorcraft laser system comprising:at least one laser carrying component operatively coupling a laser turret and a laser generating assembly;at least one fuel line fluidly coupled to a fuel tank containing a fuel; anda heat exchanger containing a portion of the laser carrying component and the fuel line to transfer heat therebetween to cool the laser carrying component.2. The cooling system of claim 1 , wherein the at least one fuel line extends between the fuel tank and a refueling probe.3. The cooling system of claim 1 , further comprising a fuel temperature gage operatively coupled to the fuel tank to determine a temperature of the fuel stored therein.4. The cooling system of claim 1 , further comprising a coolant tank containing a coolant for cooling the laser generating assembly.5. The cooling system of claim 4 , further comprising:a fuel supply line configured to route the fuel from the fuel tank to the coolant tank for cooling of the coolant stored therein; anda fuel return line configured to route the fuel back to the fuel tank after cooling of the coolant.6. The cooling system of claim 5 , further comprising:a fuel supply line check valve disposed in the fuel supply line to regulate a flow rate of the fuel; anda fuel return line check valve disposed in the fuel return line to regulate a flow rate of the fuel.7. The cooling system of claim 1 , wherein the laser carrying component comprises a fiber cable.8. The cooling system of claim 1 , further ...

CONTINUOUS WAVE END-PUMPED LASER

A laser system may include one or more of the following components: a power supply, a continuous wave pump laser, a fiber optic cable, a positive lens, a gain medium, a heat sink, and/or a Q-switch. The laser system may be used in a light detection and ranging (LIDAR) system such as a scanning LIDAR system. The laser system may be designed to operate at wavelengths that may be safe for human eyes. 1. A laser system comprising:a power supply;a continuous-wave pump laser configured to receive power from the power supply and configured to generate a first laser beam;a gain medium comprising an input surface, an output surface, and an external surface, wherein the input surface is configured to receive the first laser beam from the continuous-wave pump laser, and wherein the gain medium is configured to generate a second laser beam and to emit the second laser beam via the output surface;a heat sink coupled to the external surface of the gain medium; anda Q-switch configured to receive the second laser beam from the output surface of the gain medium.2. The laser system of claim 1 , further comprising a positive lens disposed between the continuous-wave pump laser and the gain medium claim 1 , the positive lens being configured to focus the first laser.3. The laser system of claim 1 , further comprise a lens disposed between the continuous-wave pump laser and the gain medium claim 1 , the lens having an equal optical powers in orthogonal axis claim 1 , or a different optical powers in orthogonal axis.4. The laser system of claim 1 , wherein the gain medium has a shape of a rectangular prism claim 1 , the external surface comprises four quadrilateral faces of the rectangular prism claim 1 , and the heat sink is coupled to the four quadrilateral faces of the gain medium.5. The laser system of claim 1 , wherein the heat sink and the gain medium have a substantially equal coefficient of expansion.6. The laser system of claim 1 , further comprising a thermal conductor ...

Direct Impingement Cooling of Fibers

A system provides for a way for cooling an optical fiber. The system includes a coolant and a conduit. The conduit allows the coolant to flow through the conduit. At least part of the fiber passes through the conduit allowing the coolant to flow around the at least part of the fiber. In some configurations, the fiber runs parallel to the conduit. The system can include a pump diode that is part of an optical laser connected to an end of the fiber. The optical laser can further include a high reflector connected to the fiber and a partial reflector connected to the fiber to reflect some light back and forth between the high reflector and the partial reflector.

Diamond-Based High-Stability Optical Devices for Precision Frequency and Time Generation

Chip technology for fabricating ultra-low-noise, high-stability optical devices for use in an optical atomic clock system. The proposed chip technology uses diamond material to form stabilized lasers, frequency references, and passive laser cavity structures. By utilizing the exceptional thermal conductivity of diamond and other optical and dielectric properties, a specific temperature range of operation is proposed that allows significant reduction of the total energy required to generate and maintain an ultra-stable laser. In each configuration, the diamond-based chip is cooled by a cryogenic cooler containing liquid nitrogen. 1. An optical resonator comprising:a spacer made of diamond and having a bore with openings at first and second surfaces of the spacer;a first mirror substrate made of diamond having a surface fusion bonded to the first surface of the spacer;a second mirror substrate made of diamond having a surface fusion bonded to the second surface of the spacer;a first mirror deposited on the surface of the first mirror substrate and positioned to cover the opening in the first surface of the spacer; anda second mirror deposited on the surface of the second mirror substrate and positioned to cover the opening in the second surface of the spacer,wherein the first and second mirrors are partially transmissive and parallel to each other to form a high-finesse Fabry-Pérot interferometer.2. The optical resonator as recited in claim 1 , wherein:the first mirror is bonded to the first surface of the spacer; andthe second mirror is bonded to the second surface of the spacer.3. The optical resonator as recited in claim 1 , wherein the diamond has a crystalline structure formed by chemical vapor deposition (CVD).4. The optical resonator as recited in claim 3 , wherein the spacer comprises a plurality of wafers fusion bonded across {001} surfaces.5. The optical resonator as recited in claim 3 , wherein the surfaces of the first and second mirror substrates on which ...

OPTICAL FIBER LASER AND METHOD FOR MANUFACTURING AN OPTICAL FIBER LASER

A laser includes an optical fiber having two ends of which a first end is configured to receive light therethrough, and a doped section configured to absorb at least part of the light received by the first end and for emitting light. The laser further includes a heat-conducting material which coats at least the doped section of the optical fiber. 110-. (canceled)11. An optical fiber laser comprising: two ends of which a first end is configured to receive light therethrough, and', 'a doped section configured to absorb at least part of the light received by the first end and for emitting light;, 'an optical fiber comprisinga heat-conducting material which coats at least the doped section of the optical fiber, with the heat-conducting material having a hardness less than 20 Shore A, and being polymerized and having a viscosity before polymerization less than 4 Pa·s, or less than 3 Pa·s.12. An optical fiber laser according to claim 11 , wherein the heat-conducting material has a heat conductivity of at least 0.1 W·m-1·K-1 claim 11 , or of at least 0.2 W·m-1·K-1.13. An optical fiber laser according to claim 11 , wherein the optical fiber further includes one or plural Bragg networks claim 11 , with the Bragg network or networks configured to filter light emitted by the doped section to allow only a portion having a predetermined wavelength to pass.14. An optical fiber laser according to claim 11 , further comprising a mechanical support to which the optical fiber is fixed at two fastening points located on either side of the doped section.15. An optical fiber laser according to claim 14 , wherein the mechanical support comprises a gutter filled with the heat-conducting material and wherein the optical fiber claim 14 , or its doped section claim 14 , extends.16. An optical fiber laser according to claim 14 , wherein the mechanical support further comprises:a first portion to which one of the fastening points of the optical fiber is fastened, 'the first and second portions ...

RADIALLY POLARIZED THIN DISK LASER

A radially polarized thin disk laser comprises a pumping source (), a collimating lens (), a focusing lens (), a laser gain medium (), a heat dissipating medium (), a Brewster biaxial cone (), and an output lens () which are arranged in sequence along the laser light path. The Brewster biaxial cone () comprises two opposite cones and a cylinder connecting the two cones. The angles between the conical surfaces (S,S) and bottom surfaces of the cones are the Brewster angle. The laser gain medium () is bonded to the heat dissipating medium (). A laser sub-resonator is formed between the laser gain medium () and the output lens (). After passing through the collimating lens () and the focusing lens (), the pumping laser beam emitted from the pumping source () is focused on the laser gain medium (), then the generated photons resonate in the laser sub-resonator and finally a radially polarized laser beam is outputted from the output lens (). 1. A radial polarization disk laser , comprising:a pump source, a collimator lens, a focusing lens, a laser gain medium, a heat dissipating medium, a Brewster double axial cone, and a output lens, which are sequentially arranged along a laser light path, wherein the Brewster double axial cone comprises two cones facing each other and a cylinder connecting the two cones, an angle formed between a conical surface and a bottom surface of the cone is a Brewster's angle;the laser gain medium is bonded to the heat dissipating medium;the laser gain medium and the output lens form a laser harmonic oscillator cavity therebetween;wherein pumped laser emitted from the pump source passes through the collimator lens and the focusing lens, is then focused on the laser gain medium, and generated photons oscillate in the laser harmonic oscillator cavity, and then a radially polarized laser beam is finally output by the output lens.2. The radial polarization disk laser of claim 1 , wherein the laser gain medium is a Yb:YAG disk with a doping ...

Medical laser system

A medical laser system in accordance with one or more further embodiments includes a crystal-based laser, a power supply for powering the crystal-based laser, a controller operably connected to the crystal-based laser and the power supply, and a memory operably connected to the controller. The controller is programmed to: (a) activate the crystal-based laser to cause a laser light emission by controlling power supplied by the power supply to the laser responsive to a user activation input; and (b) record data in the memory identifying a power level, number of pulses, and duration of the laser light emission.

RADIAL POLARIZATION THIN-DISK LASER

A radial polarization disk laser, including a pumping source, a collimator lens, a focusing lens, a laser gain medium, a Brewster axial cone, and a output lens, which are sequentially arranged along a laser light path. An angle formed between the conical surface and the bottom surface of said Brewster axial cone is a Brewster's angle. Said laser gain medium is bonded with said bottom surface; said laser gain medium and said output lens form a laser harmonic oscillator cavity therebetween. The pumped laser light emitted by said pumping source passes through said collimator lens and said focusing lens, then is focused on the laser gain medium, and. the generated photons oscillate in said laser harmonic oscillator cavity, and then a radial polarized laser beam is finally output by said output lens. 1. A radial polarization disk laser , comprising:a pumping source, a collimator lens; a focusing lens, a laser gain medium, a Brewster axial cone, and a output lens, which are sequentially arranged along a laser light path, wherein an angle formed between a conical surface and a bottom surface of said Brewster axial cone is a Brewster's angle;said laser gain medium is bonded with said bottom surface;said laser gain medium and said output lens form a laser harmonic oscillator cavity therebetween;wherein pumped laser light emitted by said pumping source passes through said collimator lens and said focusing lens, is then focused on the laser gain medium, and generated photons oscillate in said laser harmonic oscillator cavity, and then a radially polarized laser beam is finally output by said output lens.2. The radial polarization disk laser of claim 1 , wherein the laser gain medium is Yb:YAG disk with a doping concentration of 5.0 at % to 15 at % claim 1 , and the Yb:YAG disk has a thickness of 0.2 to 0.5 mm.3. The radial polarization disk laser of claim 2 , wherein said Brewster axial cone includes a base and a taper attached to said base claim 2 , said laser gain medium is ...