ЛАЗЕРНЫЙ ИСТОЧНИК, В ЧАСТНОСТИ, ДЛЯ ТЕХНОЛОГИЧЕСКИХ ПРОЦЕССОВ

Лазерный источник содержит блок генерации лазерного луча, содержащий диодные лазерные источники для генерации первого лазерного луча, блок оптического усиления для накачки первым лазерным лучом и излучения второго лазерного луча, и оптический блок переключения и адресации лазерного луча, расположенный между блоком генерации и блоком оптического усиления и содержащий первую оптическую линию для транспортировки первого лазерного луча к первому выходу, вторую оптическую линию для транспортировки первого лазерного луча к усилительному модулю блока оптического усиления, и селекторное устройство, расположенное между входом и первой и второй оптическими линиями для направления первого лазерного луча к первой оптической линии, чтобы генерировать лазерный луч, имеющий более высокую мощность и более низкое качество на первом выходе, или к второй оптической линии, чтобы генерировать лазерный луч, имеющий меньшую мощность и более высокое качество на втором выходе. Блок оптического усиления содержит ...

MIT EINEM FESTKÖRPERLASER GEPUMPTES MODUL UND LASEROSZILLATOR

A gas flow laser apparatus

The invention relates to a gas-flow laser apparatus. The apparatus includes two gas-flow laser emitters (4 and 14) disposed in a common active gas flow circuit (1,2). Application to military systems which equip aircraft and tanks.

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.

High-energy laser with multiple phased outputs

LASER WITH HIGH MAXIMUM PERFORMANCE AND ITS APPLICATION FOR THE PRODUCTION OF LIGHT IN THE EXTREME UV RANGE

Recurrence rate controller.

Ein Master-Laser (112) gemäss des Folgefrequenzregelgeräts (1) der vorliegenden Erfindung gibt einen Master-Laserlichtpuls aus, dessen Frequenz auf einen vorher festgelegten Wert geregelt wird. Ein Slave-Laser (212) gibt einen Slave-Laserlichtpuls aus. Ein Referenzkomparator (122, 222) vergleicht eine Spannung eines elektrischen Referenzsignals und eine vorher festgelegte Spannung miteinander, wobei die Folgefrequenz des elektrischen Referenzsignals der vorher festgelegte Wert ist, und gibt dabei ein Ergebnis des Vergleichs aus. Ein Messkomparator (115, 215) vergleicht eine Spannung basierend auf einer Lichtintensität des Slave-Laserlichtpulses und die vorher festgelegte Spannung miteinander und gibt dabei ein Ergebnis des Vergleichs aus. Ein Phasendifferenzdetektor detektiert eine Phasendifferenz zwischen der Ausgabe des Referenzkomparators und der Ausgabe des Messkomparators. Ein Schleifenfilter (134, 234) entfernt eine Hochfrequenzkomponente einer Ausgabe des Phasendifferenzdetektors ...

Having gas laser resonator of the laser device

光学元件，激光光源，激光设备，以及制作光学元件的方法

... 在一个LiTaO#-[3]基底1中形成了一些畴反转层3之后，形成一个光学波导。通过对这样形成的光学波长转换元件进行低温退火，便形成一个稳定质子交换层8，其中在高温退火过程中所产生的折射率增大被减少，由此提供了一个稳定的光学波长转换元件。这样，相位匹配波长变得恒定，谐波输出的变化被消除。结果，对于利用非线性光学效应的光学波长转换元件而言，提供了高度可靠的元件。 ...

利用受激布里渊散射相位共轭反射镜的光隔离器及其光放大系统

... 一种利用受激布里渊散射相位共轭反射镜的光隔离器及其光放大系统，使用了具有非线性反射率的受激布里渊散射相位共轭反射镜；而且将其以两侧相对称的方式设置在一个十字型的光学系统中。因而使得这种结构的装置对偏离光学系统的基准变得不敏感。如果将这种光放大系统应用于激光放大系统中，那么在具有相同重复频率的基础上，可将使输出能量增大到所希望的数值。 ...

LASER SYSTEM AND METHOD TO CONTROL THE WAVEFRONT OF A LASER BEAM

Optical bistable device for integrated optical system - includes two linked semiconductor lasers of which only one may function at one time

Laser device, extreme ultraviolet light generation device, and method for maintaining the devices

Provided is a laser device which is installed within a predetermined space and on a predetermined floor area, the laser device may includes: a master oscillator; at least one amplifier unit that amplifies a laser beam outputted from the master oscillator; at least one power source unit that supplies excitation energy to the at least one amplifier unit; and a movement mechanism which enables at least one among the at least one amplifier unit and the at least one power source unit to be moved in a direction parallel with a floor surface.

Short pulse laser system

REMOTE UV LASER SYSTEM AND METHODS OF USE

A laser apparatus includes a modelocked laser system with a high reflector and an output coupler that define an oscillator cavity. An output beam is produced from the oscillator cavity. A gain medium and a modelocking device are positioned in the oscillator cavity. A diode pump source produces a pump beam that is incident on the gain medium. A second harmonic generator is coupled to the oscillator cavity. A third harmonic generator that produces a UV output beam, is coupled to the second harmonic generator. A photonic crystal fiber is provided with a proximal end coupled to the laser system. A delivery device is coupled to a distal portion of the photonic crystal fiber.

ULTRAVIOLET LASER APPARATUS AND EXPOSURE APPARATUS COMPRISING THE ULTRAVIOLET LASER APPARATUS

An ultraviolet laser apparatus is characterized in that the apparatus comprises a laser beam generator having a single-wavelength oscillation laser for generating a laser beam of a single wavelength in a wavelength range of from the infrared region to the visible region, an optical amplifier having a fiber optical amplifier for amplifying the laser beam generated by the laser beam generator, and a wavelength converter for converting the wavelength of the amplified laser beam into an ultraviolet beam using a nonlinear optical crystal, and in that the apparatus produces ultraviolet beam of a single wavelength. An exposure apparatus for transferring the pattern of a mask onto a substrate is characterized by comprising a light source including a laser emitting a laser beam of a single wavelength, a first fiber optical amplifier for amplifying the laser beam, a beam-branching unit for branching the amplified laser beam into a plurality of beams, and a second fiber optical amplifier for amplifying ...

FIBER-LASER PUMPED CRYSTAL-LASER

An apparatus for generating and amplifying laser beams at approximately 1 micrometer wavelength is disclosed. The apparatus includes an ytterbium-doped gain-crystal pumped by an ytterbium fiber-laser. The fiber-laser enables a pump wavelength to be selected that minimizes heating of the gain-crystal. The apparatus can be configured for generating and amplifying ultra-fast pulses, utilizing the gain-bandwidth of ytterbium-doped gain-crystals.

Laser apparatus and extreme ultraviolet light generation system

A laser apparatus according to an aspect of the present disclosure includes: a master oscillator; at least one amplifier disposed on an optical path of a first pulse laser beam output from the master oscillator; a sensor disposed on an optical path of a second pulse laser beam output from the at least one amplifier; and a laser controller. The laser controller causes the laser apparatus to perform burst oscillation based on a burst signal from an external device, and performs processing of controlling a beam parameter based on a sensor output signal obtained from the sensor in a burst duration, and processing of detecting self-oscillation light from the amplifier based on a sensor output signal obtained from the sensor in a burst stop duration.

Marking apparatus with a plurality of lasers and individually adjustable sets of deflection means

The invention relates to a marking apparatus for marking an object with laser light, comprising a plurality of lasers and a control unit for individually activating each of the lasers to emit a laser beam (90a-i) according to a sign to be marked. The inventive marking apparatus is provided with a set of deflection means (30) for rearranging the laser beams (90a-i) into a desired array of laser beams, wherein the set of deflection means comprises at least two deflection means (33a-i,34a-i) per laser beam (90a-i), in particular at least two mapping mirrors (33a-i,34a-i) or at least one optical waveguide and one lens per laser beam, and each deflection means (30) is individually adjustable in its deflection direction and/or individually shiftable.

Microlaser assembly having a microresonator and aligned electro-optic components

A microlaser assembly (10) is provided that includes a microresonator, such as a side pumped microresonator (11) having an active gain medium (12) and a passive Q-switch (14), a pump source (28) for inducing resonation of the microresonator (11) and the generation of laser signals, one or more electro-optic components (36), such as one or more non-linear crystals, amplifiers, oscillators or active gain mediums, for modifying the laser signals emitted by the microlaser and a beam steering element (50) for aligning the laser signals emitted by the microresonator (11) with the electro-optic components (36). The beam steering element (50) is preferably controllably adjustable so as to precisely align the laser signals emitted by the microresonator (11) with an electro-optic component (36). In order to provide more general alignment, the microlaser assembly (10) can also include a mechanical alignment member (60). For example, the microlaser assembly (10) can include a first mechanical alignment ...

Simultaneous generation of laser radiation at two different frequencies

The output of a single semiconductor light source is used to optically pump two solid state lasers which are arranged in series and produce laser radiation at two different frequencies. Single longitudinal and single transverse mode operation can be achieved in both lasers.

ЛАЗЕРНОЕ УСТРОЙСТВО С ВЫСОКОЙ ПИКОВОЙ МОЩНОСТЬЮ ДЛЯ ГЕНЕРИРОВАНИЯ СВЕТА В ВАКУУМНОЙ УЛЬТРАФИОЛЕТОВОЙ ОБЛАСТИ СПЕКТРА

Лазерное устройство содержит по меньшей мере три генерирующих импульсы света импульсных твердотельных лазера с накачкой непрерывно работающими диодами, средство направления этих импульсов света в одну и ту же точку мишени и средство управления лазерами. Средство управления лазерами обеспечивает возможность модификации распределения во времени световых импульсов, генерированных лазерами, для создания составных импульсов. Профиль каждого составного импульса содержит первый импульс и последующий второй импульс, содержащий несколько сдвинутых по времени импульсов или рядов одновременных импульсов, причем временные сдвиги между составными импульсами меньше периода повторения импульсов лазеров. Обеспечивается создание лазерного устройства, которое при той же пиковой мощности имеет более высокую частоту повторения, и которое является менее сложным и менее дорогостоящим. 7 з.п. ф-лы, 4 ил.

ЛАЗЕРНОЕ УСТРОЙСТВО

Лазерное устройство (1) включает первый и второй лазерные блоки (2, 3), испускающие лучи (5, 6), распространяющиеся в первом и во втором направлениях, и поляризационное соединительное средство, выполненное как поляризационная соединительная призма (8) и расположенное так, что лазерные лучи первого и второго лазерных блоков, поляризованные в первом и втором направлениях, складываются. Поляризационная соединительная призма включает поверхность (80) входа света для входа лазерного луча (5) первого лазерного блока (2); отражающую поверхность (81), на которую лазерный луч (5) падает под углом полного внутреннего отражения; и поверхность (82) выхода света для выхода лазерного луча (5). Лазерный луч (6) второго лазерного блока (3) отражается от отражающей поверхности (82) в направлении, соответствующем направлению распространения лазерного луча (5) первого лазерного устройства (2) так, что за счет коллинеарной суперпозиции обоих лазерных лучей (5, 6) получают результирующий лазерный луч (9). Технический ...

СЛЭБ-ЛАЗЕР И УСИЛИТЕЛЬ И СПОСОБ ИСПОЛЬЗОВАНИЯ

Изобретение относится к лазерной технике. Лазерное устройство содержит плоский кристалл, снабженный поверхностью обратного отражения, и материал резонаторного фильтра, по существу прозрачный для частотного диапазона видимого света, обеспеченный по меньшей мере на одной стороне этого кристалла и выполненный с возможностью приема световой энергии. Указанная энергия включает часть в ультрафиолетовом частотном диапазоне и часть в частотном диапазоне видимого света. Материал резонаторного фильтра преобразует часть световой энергии в световую энергию во втором частотном диапазоне с частотами меньше, чем в ультрафиолетовом диапазоне, для поглощения плоским кристаллом. Плоский кристалл выполнен с возможностью поглощения части указанной части световой энергии в частотном диапазоне видимого света, переданной через резонаторный фильтр, а также с возможностью поглощения части световой энергии в преобразованном частотном диапазоне для усиления лазерного пучка, испускаемого из слэб-лазера. Плоский кристалл ...

ЦЕПЬ УСИЛЕНИЯ С ИЗМЕНЕНИЕМ ЧАСТОТЫ И С НЕСКОЛЬКИМИ ВЫХОДАМИ

Laservorrichtung

Es wird eine Laservorrichtung zum Einstellen einer Laserausgabe durch das genauere Erfassen der Größe eines in einem Lichtwellenleiter geleiteten reflektierten Strahls, bevor ein optischer Teil durch eine Vergrößerung des reflektierten Strahls beschädigt wird, angegeben. Eine Laservorrichtung 10 umfasst: wenigstens einen ersten Fotodetektor 160, der die Größe eines reflektierten Strahls erfasst, der ein Teil eines nach dem Reflektieren von einem Werkstück 50 zu einem Lichtwellenleiter 100 der Laservorrichtung 10 zurückkehrenden und vor allem durch eine Hülle des Lichtwellenleiters 100 geleiteten reflektierten Strahls ist; wenigstens einen zweiten Fotodetektor 170, der die Größe eines reflektierten Strahls erfasst, der ein Teil des nach dem Reflektieren von einem Werkstück 50 zu einem Lichtwellenleiter 100 der Laservorrichtung 10 zurückkehrenden und vor allem durch einen Kern des Lichtwellenleiters 100 geleiteten reflektierten Strahls ist; eine Stromversorgungseinheit 130, die einen Betriebsstrom ...

LAGERVERWALTUNGSSYSTEM MIT FUNKTIONEN FÜR DAS AUSFÜHREN VON LAGERVERWALTUNG UND VORBEUGENDER INSTANDHALTUNG

Ein Lagerverwaltungssystem umfasst eine Mehrzahl von Vorrichtungen, eine Informationsverwaltungsvorrichtung, die mit den Vorrichtungen verbunden ist, und einen Informationsprozessor. Der Informationsprozessor berechnet die Summe der kumulativen Fehlerraten, die der Summenwert der kumulativen Fehlerraten aller designierten Komponenten mit den gleichen Spezifikationen ist, die in den Vorrichtungen zu einem bestimmten Zeitpunkt verwendet werden, unter Berücksichtigung einer Beschleunigung in Abhängigkeit von einer Betriebsbedingung in Bezug auf eine kumulative Standardfehlerrate jedes Typs der designierten Komponenten mit den gleichen Spezifikationen, die in den Vorrichtungen unter einer Standardbetriebsbedingung verwendet werden, und berechnet die geeignete Lagermenge der designierten Komponenten basierend auf der berechneten Summe der kumulativen Fehlerraten.

Double pass laser amplification used e.g. in aerospace applications, produces pumping beam which is directed along the optical axis of, and into amplification medium

When coupling-in the pumping beam (P), it is directed along the optical axis of, and into, the amplification medium (7).

High-energy laser with multiple phased outputs

A high-energy laser 10 comprises a ring of lesser-powered laser modules 12,14,16 from each of which an output is taken to be projected so that they all arrive in phase on a distant target. To phase lock the outputs of all the serial laser modules, the path lengths l of the laser modules are made equal, the path length around the large loop which includes all the laser modules is made an integral multiple of the laser-module path length, and at least two different feedback loops are employed.

Optical amplifier arrangement

Laser amplification apparatus, laser apparatus, and laser nuclear fusion reactor

DEVICE FOR MARKING WITH MULTIPLE LASERS AND INDIVIDUALLY CUSTOMIZABLE SETS OF DEFLECTING MEANS

MARKING DEVICE, CONTAINING MULTIPLE LASERS, AND DEVICE DEVIATION, WHICH SERVES FOR ALIGNMENT OF LASER BEAMS

LASER SYSTEM AND METHOD FOR CONTROLLING THE WAVEFRONT OF A LASER BEAM

Un système laser (10) et un procédé associé sont proposés pour commander le front d'onde d'un faisceau laser primaire. Le système laser (10) comprend un milieu laser (12) pour produire un faisceau laser primaire et au moins un élément optique (14), vers lequel le faisceau laser primaire est dirigé, et comprend également une source laser secondaire (16) pour produire un faisceau laser secondaire, et peut en outre comprendre un modulateur spatial de lumière (18) configuré pour recevoir le faisceau laser secondaire et pour moduler spatialement le faisceau laser secondaire pour créer un faisceau laser secondaire spatialement modulé possédant un motif spatial d'intensité. Le faisceau laser secondaire spatialement modulé peut être incident sur au moins un du milieu laser (12) ou de l'au moins un élément optique (14) afin de modifier sélectivement la température de parties du milieu laser (12) ou de l'au moins un élément optique (14).

Optical bistable device for integrated optical system - includes two linked semiconductor lasers of which only one may function at one time

레이저의 반복률을 제어하는 안정화 방법 및 이를 수행하는 장치

... 레이저의 반복률을 제어하는 안정화 방법 및 이를 수행하는 장치가 개시된다. 일 실시예에 따른 안정화 장치는 제1 레이저로부터 출력된 제1 레이저 펄스를 제1 주파수 신호로 변환하여 출력하는 제1 광 검출기와, 제2 레이저로부터 출력된 제2 레이저 펄스를 제2 주파수 신호로 변환하여 출력하는 제2 광 검출기와, 상기 제1 주파수 신호 및 상기 제2 주파수 신호를 혼합하여 제3 주파수 신호를 출력하는 제1 주파수 혼합기와, 상기 제3 주파수 신호에 기초하여 상기 제2 레이저 펄스의 반복률을 제어하는 컨트롤러를 포함한다.

INK FOR MANUFACTURING LASER LIGHT SOURCE, MANUFACTURED PRINT LASER LIGHT SOURCE, AND LASER DISPLAY

The present invention discloses ink for manufacturing a laser light source, a manufactured print laser light source, and a laser display. Both the print laser light source and the laser display include the ink. The ink is used to manufacture a laser light source in a specific unit by inkjet printing, and includes a light emitting dye, a host material, and a solvent. A technology plan provided by the present invention can realize manufacturing of a laser light source through inkjet printing, can contribute to manufacturing of a cheap and industrial laser light source and other related products, and can remove speckle phenomenon due to laser interference in conventional laser display technologies by avoiding most laser interference and overlapping among scattered light of the laser light source as much as possible. In addition, the present invention can be advantageous both in reducing the volume of a display and in realizing excellent display effects by realizing a voltage driven laser display ...

LASER DEVICE AND LASER-OUTPUT CORRECTION METHOD

This invention provides the following: a laser device that, using a plurality of laser oscillators, can simultaneously emit a plurality of laser beams (L) with a preset desired output; and a laser-output correction method. This laser device is provided with the following: an output unit (38) that outputs a setting signal (Ss) corresponding to the preset desired output for the laser beams (L); the plurality of laser oscillators (16) that emit the plurality of laser beams (L); and a plurality of computation units (40) provided so as to correspond respectively to the plurality of laser oscillators (16). Each computation unit (40) outputs a laser control signal (Sl) obtained by correcting the setting signal (Ss) on the basis of the characteristics of the corresponding laser oscillator (16). Each laser oscillator (16) emits a laser beam (L) on the basis of the laser control signal (Sl) outputted by the corresponding computation unit (40).

MULTIPLE WAVELENGTH LASER ARRANGEMENT

A laser arrangement comprising a first (1) and a second (2) resonant cavity for generating a first and a second fundamental wavelength. A first (6) and a second (7) non-linear region are provided in the second cavity (2) for sum-frequency mixing of the radiation generated in the first cavity and in the second cavity, and for frequency-doubling of the radiation generated in the second cavity, respectively.

Laser Array

A laser array comprises first and second laser unit to respectively emit a first and second laser beams that propagate in a first and second directions and that are polarized in first and second polarization directions and a polarization coupling prism arranged to couple the two laser beams. The coupling prism comprises: a light entry surface to receive the first laser beam; a reflecting surface to reflect the first laser beam at an angle greater than the limit angle of total inner reflection; and a light exit surface through which the first laser beam exits the prism. The second laser unit is arranged relative to the polarization coupling prism to cause the second laser beam to impinge on and be reflected at the light exit surface in the same direction as the first laser beam exiting the prism, resulting in a collinear superposition of the first and second laser beams.

High-precision synchronization of pulsed gas-discharge lasers

Two excimer lasers have individual pulsing circuits each including a storage capacitor which is charged and then discharged through a pulse transformer to generate an electrical pulse, which is delivered to the laser to generate a light pulse. The time between generation of the electrical pulse and creation of the light pulse is dependent on the charged voltage of the capacitor. The capacitors are charged while disconnected from each other. The generation of the electrical pulses is synchronized by connecting the capacitors together for a brief period after the capacitors are charged to equalize the charging voltages. The capacitors are disconnected from each other before they are discharged.

LASER SYSTEM

A laser system includes a first laser source with a laser resonator for generating a first pulsed laser beam. The resonator has a back mirror, an outcoupling mirror and an active lasing medium in between. The system includes a second laser source for generating a second pulsed laser beam and an optical block. The optical block includes a coupling polarizer and a first polarization rotator. The optical block is movable back and forth between an active position and a passive position. In its active position the optical block is located between the outcoupling mirror and the active lasing medium such that the coupling polarizer couples the second beam into the laser resonator of the first laser source while the first rotator is positioned between the outcoupling mirror and the coupling polarizer. In the active position of the optical block a second polarization rotator is between it and the back mirror. 1. A laser system comprising:a first laser source having a laser resonator for generating a first pulsed laser beam;said laser resonator having a back mirror, an outcoupling mirror and an active lasing medium disposed between said back mirror and said outcoupling mirror;a second laser source for generating a second pulsed laser beam;a first optical block including a coupling polarizer and a first polarization rotator;said first optical block being movable back and forth between an active position and a passive position;said first optical block, in said active position, being disposed between said outcoupling mirror and said active lasing medium such that said coupling polarizer couples said second pulsed laser beam into said laser resonator of said first laser source while said first polarization rotator is positioned between said outcoupling mirror and said coupling polarizer;said first optical block, in said passive position, being disposed such that said first optical block is not interfering with said laser resonator; and,a second polarization rotator configured to ...

ピコ秒レーザ

... レーザシステムは、持続時間が60から300ピコ秒で、パルス当たり数ミリジュール(mJ/p)までのエネルギーレベルを有し、パルス幅の揺らぎが抑えられたパルスを生成する。レーザクリスタルがダイオードレーザによりポンプ(励起)される。少なくとも2つの鏡面を有する共振器は、レーザクリスタルを通るビームパスを定義する。共振器内のビームパスは、ポンプ周期の最後に近い短期間を除いて、第1の光学シャッタにより周期的にブロックされ、レーザクリスタル内にポンプエネルギーを構成する。第1の光学シャッタが開いている間、周期的なサブナノ秒の期間を除いて、第2の光学シャッタが共振器内の光をブロックする。この期間は、少なくとも1つの光パルスが共振器内を光速で複数回通過し、通過毎に励起されたレーザクリスタルからエネルギーを抽出することにより、強度を強くすることができるような期間である。光パルスが強度で確立された後、光学解放機構が共振器からパルスを解放する。 ...

Способ облучения поверхности детали многолучевой лазерной системой, обрабатывающая система и очиститель на его основе

Изобретение относится к способам и устройствам для увеличения выходной мощности лазеров, используемых в компактных переносных устройствах лазерной обработки (очистки) деталей методом абляции посредством удаления с поверхности твердого тела поврежденного слоя, ржавчины и других инородных материалов, и наслоений. В основе способа лежит формирование спая отдельных волокон лазеров с гранью объединителя из того же материала, что и волокна, в определенной конфигурации. Варианты устройств реализуют способ и содержат излучающий блок для ручного или автоматического применения. Достигается компактность системы, повышение суммарной выходной мощности лазеров и производительности системы, выбор режима обработки детали по уровню плотности мощности излучения. 2 н. и 5 з.п. ф-лы, 5 ил., 3 табл.

ЛАЗЕРНЫЙ ИСТОЧНИК, В ЧАСТНОСТИ ДЛЯ ТЕХНОЛОГИЧЕСКИХ ПРОЦЕССОВ

СПОСОБ ОБРАБОТКИ ПОВЕРХНОСТИ ОБЪЕКТА ИЗЛУЧЕНИЕМ ИМПУЛЬСНОГО ВОЛОКОННОГО ЛАЗЕРА С ПАССИВНОЙ МОДУЛЯЦИЕЙ ДОБРОТНОСТИ И ПОРТАТИВНАЯ СИСТЕМА НА ЕГО ОСНОВЕ

Изобретение относится к области лазерной техники, а именно к обработке поверхности материалов с помощью ручного портативного лазерного устройства. Излучением с энергией до 100 мДж в импульсе, генерируемым импульсным волоконным лазером с пассивной модуляцией добротности в режиме автогенерации, за счёт лазерной абляции удаляют инородное наслоение с поверхности объекта. Процесс удаления осуществляется одновременно двумя или более лазерами, выходные волокна которых сплавлены с общим оптическим блоком расширителя луча, с промежутком между спаями на одной линии. Указанный оптический блок изготовлен из того же материала, что и сердцевина выходного волокна. Расширенный таким образом на выходе оптического блока луч от каждого лазера далее фокусируют посредством оптической фокусирующей системы на поверхность объекта, формируя на ней увеличенное в 3-5 раз изображение, повторяющее расположение в линию спаев выходных волокон с блоком, а с применением циклической угловой развертки совокупности лучей, ...

A gas-flow laser apparatus

Co-aligning laterally displaced radiation beams

Laser oscillator and laser processing apparatus

SIMULTANEOUS PRODUCTION OF LASER RADIATION WITH TWO DIFFERENT FREQUENCIES.

CONTROLLING DEVICE FOR A FROM SEVERAL LASER MODULES EXISTENCE SOURCE OF LASER FOR ENERGETIC AND SPATIAL OPTIMIZATION DURING THE LASERBEARBEITUNG OF SURFACES

LASER ARRANGEMENT WITH SEVERAL WAVELENGTHS

OPTICAL SYSTEMS WITH ONE OR MORE STABILISED LASER SIGNAL SOURCES

Optical stabilisation system having a signal source (1) connected to a transmission line (2) and a noise source (3). The signal source (1) comprises a laser having a number of laser modes within a first wavelength band for generating an optical transmission signal (S). The noise source generates a narrow-band noise signal which is inserted into the transmission line via coupling means (5) and is injected into the laser of the signal source (1). The noise signal forces the laser to operate in a laser mode within the noise band. Via a power distributor (11), a portion of the noise signal can also be injected into a laser of a further signal source (9) for stabilisation in a laser mode within the same noise band. Any signals outside the noise band are removed from the transmission signal by a narrow-band filter (8). The stabilisation system is applied in passive optical networks for groupwise wavelength assignment to network terminals.

OPTICAL SYSTEMS WITH ONE OR MORE STABILISED LASER SIGNAL SOURCES

Optical stabilisation system having a signal source (1) connected to a transmission line (2) and a noise source (3). The signal source (1) comprises a laser having a number of laser modes within a first waveleng th band for generating an optical transmission signal (S). The noise source generates a narrow-band noise signal which is inserted into the transmission line via coupling means (5) and is injected into the laser of the signal source (1). The noise signal forces the laser t o operate in a laser mode within the noise band. Via a power distributor (11), a portion of the noise signal can also be injected into a laser of a further signal source (9) for stabilisation in a laser mode within the same noise band. Any signals outside the noise band are removed from the transmission signal by a narrow-band filter (8). The stabilisation system is applied in passive optical networks for groupwise wavelength assignment to network terminals.

Plasmon random laser array device based on two-dimensional material

Laser system and method for controlling wave front of laser beam

DEVICE AND PASSIVE PROCESS OF COHERENT COMBINATION Of a PLURALITY Of OPTICAL AMPLIFIERS

레이저 시스템

... 이 레이저 시스템은, 트리거 신호를 수신하고, 트리거 신호를 수신했을 때부터 제1 지연 시간이 경과하였음을 나타내는 제1 지연 신호와, 트리거 신호를 수신했을 때부터 제2 지연 시간이 경과하였음을 나타내는 제2 지연 신호를 출력하는 지연 회로부와, 제1 지연 신호를 수신하고, 제1 지연 신호를 수신했을 때부터 제1 보정 시간이 경과하였음을 나타내는 제1 스위치 신호를 출력하는 제1 트리거 보정부와, 제2 지연 신호를 수신하고, 제2 지연 신호를 수신했을 때부터 제2 보정 시간이 경과하였음을 나타내는 제2 스위치 신호를 출력하는 제2 트리거 보정부와, 지연 회로부와, 제1 트리거 보정부와, 제2 트리거 보정부에 공통의 클럭 신호를 생성하는 클럭 생성기를 구비해도 된다.

NON-CRITICAL PHASE MATCHING IN CLBO TO GENERATE SUB-213NM WAVELENGHTS

A laser illuminator and illumination method for use in an inspection system, such as a semiconductor wafer inspection system or photomask inspection system is provided. The design comprises generating fundamental frequency laser energy at different fundamental wavelengths, such as 998nm, converting a portion of the fundamental frequency laser energy to 2nd harmonic frequency laser energy, further converting the 2" harmonic frequency laser energy to 4th harmonic frequency laser energy, and mixing the 4th harmonic frequency laser energy with a portion of the fundamental frequency laser energy to produce laser energy at a sum frequency. Mixing is accomplished by non-critical phase matching in a crystal of Cesium Lithium Borate (CLBO). Alternately, the design may employ shifting a portion of the fundamental frequency laser energy to laser energy at a Raman line and/or mixing the 2nd harmonic frequency laser energy with a portion of the fundamental frequency laser energy to produce 3rd harmonic ...

Multiple Wavelength Laser Arrangement

A laser arrangement comprising a first and a second resonant cavity for generating a first and a second fundamental wavelength. A first and a second non-linear region are provided in the second cavity for sum-frequency mixing of the radiation generated in the first cavity and in the second cavity, and for frequency-doubling of the radiation generated in the second cavity, respectively.

Optical device, laser beam source, laser apparatus and method of producing optical device

After forming domain inverted layers 3 in an LiTaO₃ substrate 1 , an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus formed, a stable proton exchange layer 8 is formed, where an increase in refractive index generated during high-temperature annealing is lowered, thereby providing a stable optical wavelength conversion element. Thus, the phase-matched wavelength becomes constant, and variation in harmonic wave output is eliminated. Consequently, with respect to an optical wavelength conversion element utilizing a non-linear optical effect, a highly reliable element is provided.

Optical device, laser beam source, laser apparatus and method of producing optical device

After forming domain inverted layers 3 in an LiTaO₃ substrate 1 , an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus formed, a stable proton exchange layer 8 is formed, where an increase in refractive index generated during high-temperature annealing is lowered, thereby providing a stable optical wavelength conversion element. Thus, the phase-matched wavelength becomes constant, and variation in harmonic wave output is eliminated. Consequently, with respect to an optical wavelength conversion element utilizing a nonlinear optical effect, a highly reliable element is provided.

СЛЭБ-ЛАЗЕР И УСИЛИТЕЛЬ И СПОСОБ ИСПОЛЬЗОВАНИЯ

Изобретение относится к лазерной технике. Лазерное устройство содержит плоский кристалл, снабженный поверхностью обратного отражения, и материал резонаторного фильтра, по существу прозрачный для частотного диапазона видимого света, обеспеченный по меньшей мере на одной стороне этого кристалла и выполненный с возможностью приема световой энергии. Указанная энергия включает часть в ультрафиолетовом частотном диапазоне и часть в частотном диапазоне видимого света. Материал резонаторного фильтра преобразует часть световой энергии в световую энергию во втором частотном диапазоне с частотами меньше, чем в ультрафиолетовом диапазоне, для поглощения плоским кристаллом. Плоский кристалл выполнен с возможностью поглощения части указанной части световой энергии в частотном диапазоне видимого света, переданной через резонаторный фильтр, а также с возможностью поглощения части световой энергии в преобразованном частотном диапазоне для усиления лазерного пучка, испускаемого из слэб-лазера. Плоский кристалл ...

ЛАЗЕРНАЯ УСТАНОВКА

Изобретение относится к медицинской технике и может использоваться в оперативной урологии, в частности, при лечении доброкачественной гиперплазии простаты и в литотрипсии при лечении мочекаменной болезни. Лазерная установка содержит, по меньшей мере, первый лазерный излучатель, предназначенный для дробления камней, и второй лазерный излучатель, предназначенный для рассечения и коагуляции тканей. Первый лазерный излучатель выполнен с возможностью преобразования излучения во вторую гармонику и включает в себя лазерный резонатор на основе кристалла Nd:YAlO3 с модуляцией добротности затвором с нарушенным полным внутренним отражением и оптической волоконной линией задержки, а также внерезонаторный преобразователь излучения во вторую гармонику излучения на нелинейном кристалле с эффективностью преобразования не менее 25%. Второй лазерный излучатель включает в себя лазерный резонатор на основе кристалла Nd:YAG. В результате обеспечивается возможность объединения двух излучателей, используемых ...

Optical amplifier arrangement

Laser structure

... 1,031,230. Lasers. AMERICAN OPTICAL CO. Oct. 3, 1963 [Oct. 3, 1962], No. 38969/63. Heading H3B. A laser is provided with a source of pumping light and a source of control light of a wavelength effective to depump the laser and so control the laser output. Laser 10 is pumped by flash-tube 31 while a control laser 22 is pumped by flash-tube 32. Both flashtubes are controlled by trigger circuit 37. By providing laser 10 with higher pumping energy per unit volume than laser 22, laser 10 is caused to start producing its output before laser 22. Light from laser 22, when it is produced, is focused to a hollow cone by lens 42 having a central mask 44, and enters laser 10 through a small hole in end mirror 17. Since light from laser 22 enters laser 10 off the longitudinal axis it stimulates off-axis modes in laser 10 and the upper laser-active energy level is rapidly depopulated. The axial mode of laser 10 is immediately suppressed and off-axis light stimulated by laser 22 is blocked by mask 45.

Method and apparatus for mounting a SDL

OPTICAL SYSTEM WITH ONE OR MORE STABILIZED LASER SIGNAL SOURCES

Ultraviolet laser apparatus and exposure apparatus comprising the ultraviolet laser apparatus

DIODE LASER FIBER ARRAY FOR POWDER BED FABRICATION OR REPAIR

A method of forming a build in a powder bed includes emitting a plurality of laser beams from selected fibers of a diode laser fiber array onto the powder bed, the selected fibers of the array corresponding to a pattern of a layer of the build; and simultaneously melting powder in the powder bed corresponding to the pattern of the layer of the build. An apparatus for forming a build in a powder bed includes a diode laser fiber array including a plurality of diode lasers and a plurality of optical fibers corresponding to the plurality of diode lasers, each optical fiber configured to receive a laser beam from a respective diode laser and configured to emitting the laser beam; a support configured to support a powder bed or a component configured to support the powder bed at a distance from ends of the optical fibers; and a controller configured to control the diode laser fiber array to emit a plurality of laser beams from selected fibers of the diode laser fiber array onto the powder bed ...

Laser system and laser annealing device

Optical amplifier or image intensifier - minimises distortion due to pump heating using shaped amplifier surface with contour changing with increasing temp

PEN WITH LOTARY POINTER

레이저 시스템 또는 레이저 노광 시스템

... 레이저광의 출력 및 빔 특성의 안정성을 향상시킨다. 레이저 노광 시스템은, 피조사물에 조사되는 레이저광을 출력하는 복수의 레이저 장치와, 상기 복수의 레이저 장치로부터 출력된 복수의 레이저광의 광로 상에 배치되며, 상기 복수의 레이저광의 빔 특성을 서로 대략 일치시키는 적어도 1개의 빔 특성 조절기를 구비해도 된다.

Laser amplification system

A high peak intensity laser amplification system and the method therein implemented are provided. In a first aspect of the invention, the laser system includes at least one optical member (27) operably introducing a phase function into a high peak intensity laser pulse (25). A further aspect includes introducing destructive interference in an unchirped laser pulse prior to amplification and reconstructive interference in the output laser pulse after amplification. Dynamic pulse shaping is employed in another aspect of the present invention.

Deformometer for determining deformation of an optical cavity optic

A deformometer includes: a cavity body; entry and exit optical cavity optics, such that the optical cavity produces filtered combined light from combined light; a first laser that provides first light; a second laser that provides second light; an optical combiner that: receives the first light; receives the second light; combines the first light and the second light; produces combined light from the first light and the second light; and communicates the combined light to the entry optical cavity optic; a beam splitter that: receives the filtered combined light; splits the filtered combined light; a first light detector in optical communication with the beam splitter and that: receives the first filtered light from the beam splitter; and produces a first cavity signal from the first filtered light; and a second light detector that: receives the second filtered light; and produces a second cavity signal from the second filtered light.

UV LIGHT GENERATION BY FREQUENCY CONVERSION OF RADIATION OF A RUBY LASER PUMPED WITH A SECOND HARMONIC OF A SOLID-STATE LASER

A system and method for generating ultraviolet laser radiation by pumping a ruby based active laser medium in a second complex laser cavity with an output from a first complex laser cavity. The laser system includes a first complex optical cavity a second complex optical cavity, an output from the first complex optical cavity at a second harmonic of the first fundamental frequency pumps a ruby based active medium of the second complex optical cavity. In some embodiments, the ruby based active medium can be Cr:Al2O3 type ruby.

Folgefrequenzregelgerät

Ein Master-Laser gemäß dem Folgefrequenzregelgerät der vorliegenden Erfindung gibt einen Master-Laserlichtpuls aus, dessen Frequenz auf einen vorher fbt einen Slave-Laserlichtpuls aus. Ein Referenzkomparator vergleicht eine Spannung eines elektrischen Referenzsignals und eine vorher festgelegte Spannung miteinander, wobei die Folgefrequenz des elektrischen Referenzsignals der vorher festgelegte Wert ist, und gibt dabei ein Ergebnis des Vergleichs aus. Ein Messkomparator vergleicht eine Spannung basierend auf einer Lichtintensität des Slave-Laserlichtpulses und die vorher festgelegte Spannung miteinander und gibt dabei ein Ergebnis des Vergleichs aus. Ein Phasendifferenzdetektor detektiert eine Phasendifferenz zwischen der Ausgabe des Referenzkomparators und der Ausgabe des Messkomparators. Ein Schleifenfilter entfernt eine Hochfrequenzkomponente einer Ausgabe des Phasendifferenzdetektors. Ein Addierer addiert ein Folgefrequenzregelsignal zu einer Ausgabe des Schleifenfilters hinzu. Das ...

Anordnung zur Pulskontrolle in Oszillator-Verstärker-Systemen mittel Dual- Oszillatoren

In dieser Patentanmeldung werden Anordnungen zur Energiekontrolle von schnell wiederkehrenden Pulsen angegeben. Die Kernidee dabei besteht in der Verwendung von einem Hauptoszillator und einer dazu gehörigen Modulations-Anordnung, einem Hilfsoszillator und einer dazu gehörigen Modulations-Anordnung, wobei der Hauptoszillator einen gepulsten Strahl emittiert, dessen Pulsspitzeleistung mindestens um einen Faktor 10 höher als die des Hilfsoszillators ist, einer Optikanordnung zur koaxialen Überlagerung der Strahlen von dem Hauptoszillator und dem Hilfsoszillator. Des Weiteren wird ein Verstärker verwendet, mit dem die Leistung und die Energie des überlagerten Strahls gesteigert wird. Darüber hinaus wird ein zeitlicher Filter verwendet. Der zeitliche Filter besteht mindestens aus einem nichtlinearen Element. Durch das nichtlineare Element wird der Strahl durch nichtlineare Effekte in Abhängigkeit der instantanen Intensität beeinflusst. Dadurch werden der Teilstrahl des Hauptoszillators und ...

Multiple path infrared laser source using difference frequency generators

A method or an apparatus for laser frequency conversion comprising first laser 102 generating low power continuous light with wavelength g 1, second laser 104 generating low power continuous light with wavelength g 2, third laser 106 generating high power pulsed light with wavelength g 0, sending light with wavelength g 1 and light with wavelength g 0 to first Difference Frequency Generator (DFG) 110, sending light with wavelength g 2 and light with wavelength g 0 to second DFG 112, sending light output from first DFG 110 and second DFG 112 to third DFG 114 and fourth DFG 116 to generate high power pulsed light with wavelengths g 3 and g 3DFG and combining both wavelengths in beam splitter 118 to form a single beam. The apparatus 100 may be used as a tunable high power Long Wave Infrared (LWIR) source for detecting hazardous nitrogen compounds using laser induced breakdown spectroscopy (LIBS). Lasers 1, 2 may be tunable lasers generating narrow line width light. Reflective mirrors 108a ...

ARRANGEMENT AND METHOD FOR GENERATING ULTRASHORT LASER PULSES

FREQUENCY SHIFTED LASER TRANSMITTER

MICROLASER ASSEMBLY HAVING A MICRORESONATOR AND ALIGNED ELECTRO-OPTIC COMPONENTS

A microlaser assembly is provided that includes a microresonator, such as a side pumped microresonator having an active gain medium and a passive Q- switch, a pump source for inducing resonation of the microresonator and the generation of laser signals, one or more electro-optic components, such as one or more non-linear crystals, amplifiers, oscillators or active gain mediums, for modifying the laser signals emitted by the microlaser and a beam steering element for aligning the laser signals emitted by the microresonator with the electro- optic components. The beam steering element is preferably controllably adjustable so as to precisely align the laser signals emitted by the microresonator with an electro- optic component. In order to provide more general alignment, the microlaser assembly can also include a mechanical alignment member. For example, the microlaser assembly can include a first mechanical alignment member for aligning the microresonator and the beam steering element and ...

DEVICE FOR CONTROLLING A LASER SOURCE WITH MULTIPLE LASER UNITS FOR THE ENERGY AND SPATIAL OPTIMISATION OF A LASER SURFACE TREATMENT

A laser source has two or more laser units (LA1, LA2) and coupling means for coupling the laser beams from each unit so as to deliver a resulting beam for treating a surface. Concurrently with the laser surface treatment, the characteristics of the laser beam (FLA1, FLA2) from each unit (LA1, LA2) are adjusted to produce a resulting laser beam with a time profile of energy optimally adapted to said laser surface treatment. Homogenising means (HO) homogenise the energy distribution of the resulting laser beam, so that the energy and spatial distribution of said resulting laser beam are concurrently adapted for the selected surface treatment.

LASER WITH READILY EXCHANGEABLE WAVELENGTH SELECTIVE FEEDBACK ELEMENT

A laser having two feedback elements (17, 11), at least one which (11) is wavelength selective, is provided with a demountable optical connector (3, 13) located between the gain medium of the laser and the wavelength selective feedback element (11). An optical waveguide (3, 13) is utilised to direct optical radiation between the demountable optical connector (3, 13) and the wavelength selective feedback element (11). The demountable optical connector for example a mechanical fibre connector (3, 13), allows the wavelength selective feedback element, for example a fibre grating, to be exchanged cheaply, simply and quickly, and thus allows the wavelength of operation of the laser to be altered.

The determination of conditions of motion

위치 측정 및 지시 장치와 이를 이용한 제품 결함 검사 및 보수 방법

... 본 발명은 위치 측정 및 지시 장치와 이를 이용한 제품 결함 검사 및 보수 방법에 관한 것으로서, 다리부; 몸체부; 제1 레이저 빔을 발사하며 상기 몸체부에 힌지 결합되는 제1 레이저부; 제2 레이저 빔을 발사하며 상기 몸체부에 힌지 결합되는 제2 레이저부; 상기 몸체부에 힌지 결합되는 목부; 제3 레이저 빔을 발사하며 상기 목부에 힌지 결합되는 제3 레이저부; 및 상기 제1 레이저 빔의 발사 거리, 상기 제1 레이저부의 회전 각도, 상기 제2 레이저 빔의 발사 거리, 상기 제2 레이저부의 회전각도, 상기 목부의 회전 각도, 상기 제3 레이저 빔의 발사 거리 및 상기 제3 레이저부의 회전 각도를 측정 및 재현하는 제어부;를 포함할 수 있다. 이에 의하여, 재마킹 부위의 위치 정확도를 향상시킬 수 있다. 또한, 마킹 부위의 위치를 측정하고 기록하는데 소요되는 시간과 비용을 절감하고, 보수 시 지워진 마킹 부위의 위치를 추적하고 재마킹하는데 소요되는 시간과 비용을 절감할 수 있다. 또한, 재마킹 부위의 영역을 좁혀, 재검사에 소요되는 시간과 비용을 절감할 수 있다.

LASER AMPLIFICATION SYSTEM

A laser amplification system is provided. In another aspect, a laser system and method include at least one optical member operably introducing a phase function into a high peak intensity laser pulse. A further aspect includes introducing destructive interference in an unchirped laser pulse prior to amplification and reconstructive interference in the output laser pulse after amplification. Dynamic pulse shaping is employed in an aspect of the present system.

INTEGRATED LASER OSCILLATOR-AMPLIFIER SYSTEM

The present invention contemplates an integrated oscillator-amplifier system (100) for deep UV generation. The system (100) employs a long cavity oscillator to lengthen the pulse build-up time and to control the pulse spectral bandwidth. Meanwhile the system employs a short cavity amplifier to shorten the energy extraction time to produce a single short pulse with good energy extraction efficiency. The system further integrates the oscillator and the amplifier by inserting the amplifier inside the oscillator cavity (101-105) via a mirror (103) of low reflectivity. As a result, the integrated system has a long build-up time to generate a short amplified single pulse in the short cavity. Consequently, the integrated system can accommodate a relatively long pump pulse to produce a shingle short amplified suitable for deep UV laser generation.

LASER-BASED LIGHT SOURCE WITH LIGHT EMISSION CONTROL

The invention describes a laser-based light source (100) which is adapted to use the angular dependence of the reflection of polarized laser light (10) at a surface of a conversion material to control especially the color point of light emitted by means of the laser-based light source (100). The reflected laser light is within a first wavelength range and the converted light is in a second wavelength range different from the first wavelength range such that the color point of the light emitted by means of the laser-based light source (100) in a defined solid angle depends on the ratio between reflected and converted light. The invention further describes a corresponding method of light emission control, a vehicle headlight (200) comprising such a laser-based light source (100) and a lighting system comprising such vehicle headlights (200).

LASER ANNEALING DEVICE AND ANNEALING METHOD THEREFOR

A laser annealing device and methods for annealing using the device are disclosed. The laser annealing device includes: a laser light source system (3); a laser adjusting system (4) that is connected to the laser light source system and is disposed above a wafer (1); a temperature monitoring system (5) that is disposed above the wafer (1) and configured to measure in real time a temperature at a location of the surface of the wafer at which a light spot is formed; and a central control system (6) in connection with each of the laser light source system, the laser adjusting system, the temperature monitoring system and a wafer table (2). The wafer is jointly annealed by laser beams from several independent lasers (31) in the laser light source system, which have different wavelengths and cooperate in a mutually complementary manner, with a selected optimum set of process parameters. As a result, an optimum annealing temperature can be achieved and surface pattern effects can be effectively ...

OPTICAL COMBINER AND LASER DEVICE

There is provided an optical combiner that can facilitate fusion splicing of an input optical part and an output optical part. An optical combiner 40 has an optical output portion 130 with a connection end face 135 to which optical input portions 110 and 120 having cores 11 and 21 are connected. The optical output portion 130 includes cores 31 and 33 that allows light to propagate therethrough and an outer cladding layer 34 located outside of the core 33. The optical input portions 110 and 120 are connected to the connection end face 135 of the optical output portion 130 such that the cores 11 and 21 are optically coupled to the cores 31 and 33 of the optical output portion 130. An outside diameter D1 of the outer cladding layer 34 on the connection end face 135 of the optical output portion 130 is less than a diameter of the smallest inclusive circle C1 that includes all of claddings 22 of the optical input portions 120 on the connection end face 135 of the optical output portion 130.

FORMING METHOD FOR SUPERPOWERED COMPOSITE LASER BEAM

PURPOSE: To obtain large power laser beams, by making a plurality of laser beams adjacent to each other in parallel so as to form parallel composite beams and reducing a peripheral diameter of the composite beams so as to form reduced parallel beams and further combining a plurality of the reduced parallel beams. CONSTITUTION: A plurality of laser beams, whose cross-sectional area is circular, are made adjacent to each other in parallel so as to form parallel composite beams, and the composite beams are formed into reduced parallel composite beams of high energy density by the use of a method in which a peripheral diameter of the composite beams is reduced. The reduced parallel composite beams are assumed one assembled beam and combined in plural so that density of the beam quantity can be enlarged to form large power beams. For example, three laser oscillators 1 to 3 and two circle- shaped plane laser mirrors 4, 5 are used to form a parallel flux of three beams, and a diameter of the parallel ...

LASER LIGHT SOURCE

PROBLEM TO BE SOLVED: To provide a laser light source which suppresses generation of optical surge upon a restart after suspension of output of pulsed light. SOLUTION: The laser light source 1 comprises a first light source 17 outputting light with a first wavelength as pulsed light, a second light source 21 outputting light with a second wavelength different from the first wavelength, an optical amplification fiber 12 as an optical amplifier amplifying the pulsed light outputted from the first light source 17 and the light outputted from the second light source 21, and a control unit 22 controlling the output of the light from the second light source in accordance with the light output from the first light source 17. The first light source 17 has an ON state in which repetitive output of the pulsed light on a fixed cycle starts and continues, and an OFF state in which the output of the pulsed light is suspended during a duration of not less than the fixed cycle. The control unit 22 controls ...

ЦЕПЬ УСИЛЕНИЯ С ИЗМЕНЕНИЕМ ЧАСТОТЫ И С НЕСКОЛЬКИМИ ВЫХОДАМИ

Изобретение относится к системе (100) для усиления импульсов со сдвигом частоты с М выходами, причем М>1, которая содержит: расширитель (10) со степенью расширения tx_stretch, М усилителей, расположенных каскадом (201,….20М), М выходных устройств (301,….30М) сжатия, соответственно помещенных при выходе из каждого усилителя, причем упомянутая цепь каскадов усиления дополнительно содержит: устройство (50) частичного сжатия, помещенное между расширителем и первым усилителем, устройство частичного сжатия, имеющее по меньшей мере одну степень частичного сжатия, степень (или степени) частичного сжатия, меньшую чем tx_stretch, и оптический коммутатор (40), сконфигурированный с возможностью приема выходного пучка расширителя (10) и направления его непосредственно к первому усилителю (201) каскада или на устройство (50) частичного сжатия в зависимости от выходного компрессора, выбранного среди выходных компрессоров. Техническим результатом при реализации заявленного решения является возможность ...

Optical amplifier and transmission loss measurement method

An optical amplifier that amplifies signal light with Raman amplification in the Raman amplification medium. The optical amplifier includes a light source that supplies pump light into the Raman amplification medium, a first detector that detects input power of the pump light to be input to the Raman amplification medium, a second detector that detects output power of the pump light output from the Raman amplification medium, and a processor operable to calculate transmission loss of the pump light in the Raman amplification medium by comparing the input power with the output power, and calculate transmission loss of the signal light in the Raman amplification medium based on the transmission loss of pump light corrected based on a wavelength of the signal light and a wavelength of the pump light.

Laser oscillator control device

A laser oscillator control device includes a controller having a transmitter section and a receiver section; a laser oscillator having a transmitter section and a receiver section and communicating with the controller via a communication line; wherein the laser oscillator control device outputs a control signal from the controller to the laser oscillator, based on a status signal indicating operational state of the laser oscillator sent from the laser oscillator to the controller. The controller has an alternating signal transmitter circuit that generates an alternating signal that changes at a predetermined period, and sends this alternating signal to the laser oscillator, and the laser oscillator has a return signal transmitter circuit which generates a return signal that changes periodically in correspondence to the alternating signal from the controller, and sends this return signal to the controller. Furthermore, the controller has a monitoring circuit monitoring the return signal from the laser oscillator, and if it determines that there is an abnormality in the return signal, outputs a stop control signal for stopping laser beam irradiation by the laser oscillator.

Device for amplifying light impulses

The present invention relates to a device ( 12 ) and to a method for amplifying light impulses ( 13 ). The device comprises a stretcher ( 15 ) stretching the light impulses over time, at least one amplifier ( 16 ) amplifying the stretched light impulses, and a compressor ( 17 ) compressing the stretched and amplified light impulses, wherein the amplifier ( 16 ) applies a non-linear phase generated by self-phase modulation to the stretched light impulses. In order to provide a device and a method for amplifying light impulses, by means of which light impulses having higher light impulse quality and light impulse peak power can be generated, the invention proposes that means for spectrally shaping the light impulses are disposed ahead of the amplifier ( 16 ) in the beam path, wherein the means for spectrally shaping the light impulses bring about a spectral trimming of the light impulses.

Multi-wavelength high output laser source assembly with precision output beam

A laser source assembly ( 210 ) for generating an assembly output beam ( 212 ) includes a first laser source ( 218 A), a second laser source ( 218 B), and a dispersive beam combiner ( 222 ). The first laser source ( 218 A) emits a first beam ( 220 A) having a first center wavelength, and the second laser source ( 218 B) emits a second beam ( 220 B) having a second center wavelength that is different than the first center wavelength. The dispersive beam combiner ( 222 ) includes a common area 224 that combines the first beam ( 220 A) and the second beam ( 220 B) to provide the assembly output beam ( 212 ). The first beam ( 220 A) impinges on the common area ( 224 ) at a first beam angle ( 226 A), and the second beam ( 220 B) impinges on the common area ( 224 ) at a second beam angle ( 226 B) that is different than the first beam angle ( 226 A). Further, the beams ( 220 A) ( 220 B) that exit from the dispersive beam combiner ( 222 ) are substantially coaxial, are fully overlapping, and are co-propagating.

Distribution system for optical reference

A system for distributing a reference oscillator signal includes a clock having a reference oscillator and a femtosecond laser stabilized by the reference oscillator. The system also includes at least one beamsplitter configured to split the femtosecond laser. The system further includes one or more remote nodes that are spaced from the clock. The remote nodes are configured to generate reference signals based on the split femtosecond laser.

Repetition frequency control device

According to the repetition frequency control device, a master laser outputs a master laser light pulse the repetition frequency of which is controlled to a predetermined value. A slave laser outputs a slave laser light pulse. A reference comparator compares a voltage of a reference electric signal the repetition frequency of which is the predetermined value and a predetermined voltage with each other, thereby outputting a result thereof. A measurement comparator compares a voltage based on a light intensity of the slave laser light pulse and the predetermined voltage with each other, thereby outputting a result thereof. A phase difference detector detects a phase difference between the output from the reference comparator and the output from the measurement comparator. A loop filter removes a high-frequency component of an output from the phase difference detector.

Remotely Induced Atmospheric Lasing

A laser pulse from an ultrashort pulse laser (USPL) is fired into the atmosphere. The USPL pulse is configured to generate a plasma filament at a predefined target in the atmosphere, in which free, or “seed,” electrons are generated by multi-photon or tunneling ionization of the air molecules in the filament. A second pulse is fired into the atmosphere to form a heater beam that impinges on the plasma filament and thermalizes the seed electrons within the plasma filament, leading to the collisional excitation of the electrons in the filament. The excited electrons collisionally excite various electronic and vibrational states of the air molecules in the filament, causing population inversions and lasing, e.g., exciting the C 3 Π u →B 3 Π g (v=0→0) transition of the N 2 in the atmosphere to cause lasing at 337 nm.

Fiber lasers for producing amplified laser pulses with reduced non-linearity

The present application discloses techniques and devices comprising fiber-based chirped fiber Bragg grating for compressing amplified laser pulses.

Laser device for exposure apparatus

A laser device for an exposure apparatus may include: a MOPA-type or MOPO-type laser device including a seed laser and at least one gas discharge-pumped amplifier stage that receives output light from the seed laser as an input, amplifies the light, and outputs the amplified light; and at least one of a laser gas control device that at least changes the total pressure of a laser gas in said amplifier stage in accordance with requested energy and a laser power source control device that at least changes pump intensity of discharge electrodes in said amplifier stage in accordance with said requested energy, in a case where the energy of laser output light from said laser device is to be changed discontinuously in response to a request from an exposure apparatus,

Wavelength conversion device, solid-state laser apparatus, and laser system

A wavelength conversion device in this disclosure may include: a nonlinear crystal including a first surface; a first film to be joined to the first surface and including at least one layer; and a first prism to be joined to the first film.

Optical Source with Remote Optical Head Outputting High Power Short Optical Pulses

An optical source can include a remote optical head for outputting high power short optical pulses. The optical source can include signal source operable to output short optical pulses; an optical pump light source; an optical head provided at a location remote from the location of the optical signal source; and an optical fibre amplifier having at least its optical output located within the optical head. The source can also include an optical signal delivery fibre arranged to deliver optical pulses from the optical signal source to the optical fibre amplifier and a pump light delivery fibre arranged to deliver optical pump light to the high power optical fibre amplifier. In use short optical pulses of a first optical power are delivered to the optical fibre amplifier and are amplified therein to a higher optical power for output from the optical head

High-precision synchronization of pulsed gas-discharge lasers

Two excimer lasers have individual pulsing circuits each including a storage capacitor which is charged and then discharged through a pulse transformer to generate an electrical pulse, which is delivered to the laser to generate a light pulse. The time between generation of the electrical pulse and creation of the light pulse is dependent on the charged voltage of the capacitor. The capacitors are charged while disconnected from each other. The generation of the electrical pulses is synchronized by connecting the capacitors together for a brief period after the capacitors are charged to equalize the charging voltages. The capacitors are disconnected from each other before they are discharged.

All-fiber low mode beam combiner for high power and high beam quality

A low mode beam combiner ( 10 ) including individual entry fibers ( 12 ) that maintain a low mode operation, an exit fiber ( 16 ), and a spliced section ( 14 ) including a bundle of spliced entry fibers ( 12 ), in which a bundle diameter is reduced to a LMA (large mode area) core of the exit fiber ( 16 ).

Light source apparatus and processing method

The present invention relates to a light source apparatus. The light source apparatus has an MOPA configuration and comprises a seed light source, a pulse generator, an intermediate optical amplifier, a final stage optical amplifier, a delivery optical fiber, and a light output terminal. The delivery optical fiber is a PBG fiber having a photonic bandgap (PBG) structure in a core-surrounding portion located around the core. Light with a wavelength in a high loss band of the PBG fiber is inputted into the PBG fiber.

Apparatus for adjusting polarization characteristics, and ultra-short ultra-high intensity pulse laser generator comprising same

The present invention relates to an apparatus for generating an ultra-short ultra-high intensity pulse laser, comprising: a pulse laser providing unit which generates an ultra-short ultra-high intensity pulse laser, stretches pulse width, then selects and provides only a pulse laser having a predetermined polarizing angle; a polarization characteristic adjusting unit which divides the pulse laser provided by the pulse laser providing unit into S-polarizing component light and P-polarizing component light, varies the phase difference and amplitude difference between the S-polarizing component light and the P-polarizing component light, and combines the two types of light to generate a pulse laser with varied polarization characteristics; and a pulse compression unit which compresses the pulse width of the pulse laser, the polarization characteristics of which are varied by the polarization characteristic adjusting unit, and outputs the pulse laser.

Frequency Control of Despeckling

A method and apparatus that reduces laser speckle by using stimulated Raman scattering in an optical fiber. The pulse repetition frequency of the laser is adjusted to control aspects of the laser light such as color or despeckling. In DLP projection systems, an optical monitor may be used to send information to a bit sequence, and the bit sequence may control the pulse repetition frequency of the laser based on the optical monitor signal.

Laser apparatus and extreme ultraviolet light generation system including the laser apparatus

A laser apparatus may include: a master oscillator configured to output a pulsed laser beam at a repetition rate; at least one amplifier disposed on a beam path of the pulsed laser beam; at least one optical shutter disposed on the beam path of the pulsed laser beam; and a controller configured to switch the at least one optical shutter.

Frequency-chirped semiconductor diode laser phase-locked optical system

A chirped diode laser (ChDL) is employed for seeding optical amplifiers and/or dissimilar optical paths, which simultaneously suppresses stimulated Brillouin scattering (SBS) and enables coherent combination. The seed spectrum will appear broadband to suppress the SBS, but the well-defined chirp will have the coherence and duration to allow the active phasing of multiple amplifiers and/or dissimilar optical paths. The phasing is accomplished without optical path-length matching by interfering each amplifier output with a reference, processing the resulting signal with a phase lock loop, and using the error signal to drive an acousto-optic frequency shifter at the front end of each optical amplifier and/or optical path.

Method and Apparatus for Suppression of Stimulated Brillouin Scattering Using Polarization Control with A Birefringent Delay Element

A method and apparatus for suppression of stimulated Brillouin scattering (SBS) includes a master oscillator (MO) that generates a beam; a birefringent element that receives and transmits the beam, wherein the beam is transmitted with a transmission delay between two orthogonal axes; a polarization controller that receives the beam and transmits the beam with a desired polarization; a fiber amplifier that receives the beam, amplifies the beam, and transmits a beam; a compensating birefringent element that receives the beam, approximately removes the transmission delay between the two axes of the beam, and transmits an output beam; and a polarization detector that detects the output beam's polarization and provides feedback to the polarization controller to ensure that the polarization of the output beam is approximately equal to a desired output polarization, so as to reduce SBS.

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 oscillation apparatus

Provided is a laser oscillation apparatus capable of stabilizing resonance even when finesse of an optical resonator is increased and generating stronger laser light than that of a traditional apparatus by accumulating laser light in the optical resonator. The laser oscillation apparatus includes a laser light source which generates laser light for excitation, a fiber amplifier which generates laser light with a desired wavelength when the laser light generated at the laser light source for excitation is supplied, an optical resonator, an optical isolator which is interposed between the optical resonator and the fiber amplifier and which guides the laser light from the fiber amplifier to one side of the optical resonator while blocking laser light in the opposite direction, a circulation optical path which accelerates resonance as introducing laser light emitted from the other side of the optical resonator and returning the laser light to the optical resonator via the fiber amplifier and the optical isolator, and a modulator which performs amplitude modulation on the laser light in the circulation optical path.

Fiber amplifier system including tapered fiber bundle and combined lens and sampling grating

A fiber laser amplifier system including a beam splitter that splits a feedback beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundle couples the output ends of all of the fiber amplifiers into a combined fiber providing a combined output beam. A beam sampler samples a portion of the output beam from the tapered fiber bundle and provides a sample beam. A single mode fiber receives the sample beam from the beam sampler and provides the feedback beam.

Optical coherence tomography using active mode-locking fiber laser

Discloses is an optical coherence tomography (OCT) which uses an active mode-locking fiber laser in order to obtain image information of a sample. An imaging device in accordance with an embodiment comprises: a light source unit; a light separation unit; a reference unit; a diagnostic unit; a light coupling unit; and a signal processing unit. The imaging device removes a high-priced variable filter which has mechanical restrictions by directly delivering a modulation signal to a light source unit, so it can overcome mechanical restrictions and reduce costs.

Laser apparatus and laser materials processing apparatus provided with same

A laser apparatus of the present invention has a first laser oscillator that emits a first laser beam; a passive fiber that is a double-clad fiber that transmits the first laser beam through a core; and a second laser oscillator that emits a second laser beam that is coupled into inner cladding of the passive fiber. Additionally, a laser materials processing apparatus of the present invention is provided with the laser apparatus; and an irradiation optical system having a collimating lens and a condenser lens.

Laser apparatus

A laser apparatus includes a master oscillator capable of outputting a laser beam having a spectrum that includes at least three wavelength peaks, a multi-wavelength oscillation control mechanism capable of controlling energy of each of the wavelength peaks, a spectrum detecting unit that detects the spectrum of the above-mentioned laser beam, and a controller that controls the multi-wavelength oscillation control mechanism based on a detection result detected by the spectrum detecting unit.

Master oscillator system and laser apparatus

A master oscillator system may include a grating configured to function as one resonator mirror in an optical resonator, a spectral bandwidth tuning unit configured to tune the spectral bandwidth of a laser beam transmitted within the optical resonator, a storage unit configured to store a control value of the spectral bandwidth tuning unit corresponding to a desired spectral bandwidth and a controller configured to control the spectral bandwidth tuning unit based on the control value stored in the storage unit.

OPTICAL AMPLIFIER ARRANGEMENT

The invention relates to an optical amplifier arrangement for amplifying ultra-short pulsed laser radiation comprising a mode-locked laser () and two or more optical amplifiers () arranged downstream of the laser () in the propagation direction of the laser radiation. Optical amplifier arrangements of this type are known in the prior art. Here the intention is to present an alternative to the known amplifier arrangements. The invention proposes arranging between the laser () and the optical amplifiers () at least one splitting element () which splits the pulsed laser radiation between a plurality of amplifier channels (), wherein each amplifier channel () has at least one optical amplifier (), and wherein at least one common combination element () is disposed downstream of the amplifier channels () and coherently superimposes the pulsed laser radiation amplified in the amplifier channels (). 1131. Optical amplifier arrangement for amplifying ultra-short pulsed laser radiation comprising a mode-locked laser () and two or more optical amplifiers () arranged downstream of the laser () in the propagation direction of the laser radiation ,wherein{'b': 2', '4', '1', '3', '4', '3', '5', '4', '4, 'at least one splitting element () which splits the pulsed laser radiation between a plurality of amplifier channels () is arranged between the laser () and the optical amplifiers (), wherein each amplifier channel () has at least one optical amplifier (), and wherein at least one common combination element () is disposed downstream of the amplifier channels () and coherently superimposes the pulsed laser radiation amplified in the amplifier channels ().'}2612. Optical amplifier arrangement as defined in claim 1 , wherein at least one overall pre-amplifier () is arranged between the laser () and the splitting element ().32. Optical amplifier arrangement as defined in claim 1 , wherein the splitting element () is a partly reflecting mirror claim 1 , a polarizing beam divider claim 1 ...

Laser spark plug for an internal combustion engine and operating method for the same

A laser spark plug for an internal combustion engine has a laser device including a plurality of surface emitting semiconductor lasers for generating laser pulses.

Femtosecond laser apparatus and femtosecond laser system including the same

There is disclosed a femtosecond laser apparatus including a first laser material comprising Ng, Np and Nm axes spatially perpendicular to each other; a second laser material comprising Np axis, Nm axis and Ng axis; and a first laser diode and second laser diodes, wherein the traveling direction of laser beams generated from the first and second laser materials is substantially parallel to Ng axis of the first laser material and the polarizing direction of laser beams generated from the first and second laser materials is substantially parallel to Np axis of the first laser material, and the traveling direction of laser beams generated from the first and second laser materials is substantially parallel to Np axis of the second material and the polarizing direction of laser beams generated from the first and second laser materials is substantially parallel to Nm axis of the second laser material.

Method and laser oscillator for the generation of a laser beam

Method and laser oscillator for the generation of a laser beam—According to the invention with a view to adjusting, inside said laser oscillator ( 1 ), the phase of each of the N elementary laser beams (FLE. 1, FLE. 2, FLE.N) generated on the basis of said laser oscillator ( 1 ) in such a way that said elementary laser beams are in phase, the deviation between the phase of an individual elementary laser beam (FLE. 1 ) and the phases of the N−1 other elementary laser beams (FLE. 2, FLE.N) is converted into a level of luminous intensity by means of at least one optical filtering element to which at least a part of each elementary laser beam is directed.

HIGH-POWER OPTICAL FIBRE LASER

A high-power optical fibre laser includes: an oscillator (); a pumping laser () able to emit a high-power pumping optical radiation beam; and a signal-amplifying optical fibre () able to receive the optical source signal and the high-power pumping optical radiation beam so as to generate a high-power laser beam. The pumping laser includes a plurality of pumping multimode laser diodes (-) and a laser cavity, the laser cavity including a double-clad fibre () including: a neodymium-doped monomode waveguide; a fibre Bragg grating () forming one end of the laser cavity; and a fibre reflector () forming the other end of the laser cavity, the monomodefibre laser being able to generate a laser radiation beam when it is optically pumped by a pumping radiation beam originating from the plurality of pumping laser diodes in order for the laser cavity to emit a high-power pumping laser radiation beam. 1. A high-power optical fiber laser comprising:{'b': '1', 'an oscillator () adapted to emit a source optical signal to be amplified,'}{'b': '5', 'a pump laser () adapted to emit a high-power pump optical radiation,'}{'b': '3', 'a signal-amplifying optical fiber (), adapted to receive said source optical signal and said high-power pump optical radiation,'}characterized in that{'b': 5', '7', '7', '7', '7', '7', '7', '4', '9', '11', '4', '7', '7', '7', '7', '7', '7, 'i': a,', 'b,', 'c,', 'd,', 'e,', 'f', 'a,', 'b,', 'c,', 'd', 'e,', 'f, 'said pump laser () comprises a plurality of multimode pump laser diodes () and a laser cavity, said laser cavity comprising a double-clad fiber including a Neodymium-doped single-mode guide (), an optical fiber Bragg grating () forming an end of said laser cavity and a fiber reflector () forming the other end of said laser cavity, said single-mode laser fiber () being adapted to generate a laser radiation when it is optically pumped by a pump radiation coming from the plurality of pump laser diodes (, ) so that said laser cavity emits a high-power ...

Optical pulse apparatus and method

The invention can include an apparatus for producing optical pulses, comprising an oscillator for producing optical pulses at a first optical pulse repetition frequency, the optical pulses having a first wavelength and a first time duration; a pulse picker for receiving optical pulses having the first optical pulse repetition frequency, first wavelength and first time duration and operable to reduce the optical pulse repetition frequency to produce optical pulses having the first wavelength, first time duration and a reduced optical pulse repetition frequency that is less than the first optical pulse repetition frequency; an optical fiber receiving optical pulses at the reduced optical pulse repetition frequency and having the first wavelength and first time duration to produce, at the reduced optical pulse frequency, optical pulses that include one or more nonlinearly produced wavelengths different than the first wavelength.

WAVELENGTH-TUNABLE LIGHT SOURCE AND WAVELENGTH VARIATION METHOD

A wavelength-tunable light source includes light sources having differing variable wavelength regions, where light sources having adjacent wavelength regions are distributed to different systems. The light sources are each set such that an end portion of the variable wavelength region of the light source overlaps an end portion of the variable wavelength region of another light source. A control unit selects and drives a first light source of a first system, varies a wavelength of the first light source, selects a second light source that is of a second system among the different systems and that has a wavelength region overlapping the variable wavelength region of the first light source, drives the second light source concurrently with the first light source and subsequently switches to the output light of the second light source, causing wavelength variation and executing continuous wavelength variation over a wide range. 1. A wavelength-tunable light source comprising:a plurality of light sources having differing variable wavelength regions, where light sources having adjacent wavelength regions are distributed to different systems;a first coupling device that couples light output by the light sources included in the same system;an optical switching device that transmits or blocks light included in the same system;a second coupling device that couples light of the different systems and outputs the coupled light; anda control unit that controls driving of each of the light sources and the optical switching device, whereinthe light sources are each set such that an end portion of the variable wavelength region of the light source overlaps an end portion of the variable wavelength region of another light source, andthe control unit selects and drives a first light source among the light sources of a first system that is among the different systems, varies a wavelength of the first light source, the control unit further selects a second light source that is of a ...

LASER DRILLING AND MACHINING ENHANCEMENT USING GATED CW AND SHORT PULSED LASERS

The present disclosure relates to a laser system for processing a material. The system may make use of a laser configured to intermittently generate a first laser pulse of a first duration and a first average power, at a spot on a surface of the material being processed, and a second laser pulse having a second duration and a second peak power. The second duration may be shorter than the first duration by a factor of at least 100, and directed at the spot. The second laser pulse is generated after the first laser pulse is generated. The first laser pulse is used to heat the spot on the surface of the material, while the second laser pulse induces a melt motion and material ejection of molten material from the melt pool. 1. A laser system for processing a material , the laser system comprising:a laser configured to intermittently generate a first laser pulse of a first duration and a first average power, at a spot on a surface of the material being processed, and a second laser pulse having a second duration and a second peak power, the second duration being shorter than the first duration by a factor of at least 1000, and directed at the spot, and the second laser pulse being generated after the first laser pulse is generated; andthe first laser pulse from the laser is configured to at least heat the spot on the surface of the material, while the second laser pulse induces material ejection from the spot.2. The laser system of claim 1 , wherein the laser comprises:a gated continuous wave (CW) laser; anda pulsed laser.3. The laser system of claim 1 , further comprising a controller for controlling the laser.4. The laser system of claim 2 , further comprising a controller for controlling the CW laser and the pulsed laser.5. The laser system of claim 1 , wherein the first laser pulse has a duration of about 10 μs to 500 μs.6. The laser system of claim 1 , wherein the second laser pulse has a duration of about 1 μs to 100 μs.7. The laser system of claim 1 , wherein the ...

METHOD AND APPARATUS FOR USE IN LASER SHOCK PEENING

An apparatus may include a diode-pumped solid-state laser oscillator configured to output a pulsed laser beam, a modulator configured to modify an energy and a temporal profile of the pulsed laser beam, and an amplifier configured to amplify an energy of the pulse laser beam. A modified and amplified beam to laser peen a target part may have an energy of about 5J to about 10 J, an average power (defined as energy (J) x frequency (Hz)) of from about 25 W to about 200 W, with a flattop beam uniformity of less than about 0.2. The diode-pumped solid-state oscillator may be configured to output a beam having both a single longitudinal mode and a single transverse mode, and to produce and output beams at a frequency of about 20 Hz. 130-. (canceled)31. A system comprising:a diode-pumped solid-state laser (DPSSL) oscillator configured to generate a pulsed laser beam having a first set of laser beam characteristics;a modulator configured to modify the pulsed laser beam to generate a modulated pulsed laser beam, wherein the modulated pulsed laser beam has a second set of laser beam characteristics;a multi-stage amplifier configured to modify the modulated pulsed laser beam to generate a first pulsed laser beam, wherein the first pulsed laser beam has a third set of laser beam characteristics, and further configured to modify the first pulse laser beam to generate a second pulsed laser beam, wherein the second pulsed laser beam has a fourth set of laser beam characteristics; anda beam delivery system configured to deliver the second pulsed laser beam to a target part to laser shock peen the target part.32. The system of claim 31 ,wherein the first set of laser beam characteristics comprises a first energy, a first temporal profile, and a first spatial profile;wherein the second set of laser beam characteristics comprises a second energy, a second temporal profile, and the first spatial profile;wherein the third set of laser beam characteristics comprises a third energy, a ...

WEAPONS SYSTEM HAVING AT LEAST TWO HEL EFFECTORS

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

Lidar system and autonomous driving system using the same

A lidar system includes: light sources generating light of a linear light source type; a light emission unit including a diffractive optical element disposed ahead of the light sources and separating incident light from the light sources into point light sources, and a scanner moving the light separated by the diffractive optical element, and radiating light of a point light source to an object; and a reception sensor converting light received after reflection by the object into an electrical signal. Spectrum angles of point light sources that have passed through the diffractive optical element may be different according to a position of the diffractive optical element. According to the lidar system, an autonomous vehicle, AI device, and/or external device may be linked with an artificial intelligence module, drone ((Unmanned Aerial Vehicle, UAV), robot, AR (Augmented Reality) device, VR (Virtual Reality) device, a device associated with 5G services, etc.

APPARATUS

Provided is an apparatus for acquiring object information, the apparatus including: first and second laser output unit outputting first and second pulsed laser; a laser controlling unit configured to control each laser output unit; a first or second detecting unit configured to detect an emission timing of laser and output a first or second detection signal; a probe configured to receive an acoustic wave from an object being irradiated with the laser; and a signal processing unit configured to acquire specific information of the object, based on the acoustic wave. The laser controlling unit controls output of at least one of the laser output units so as to decrease a time difference between subsequent first and second pulsed lasers to be output. 1. An apparatus , comprising:a first and a second laser output unit configured to output a first and a second pulsed laser respectively;a laser controlling unit configured to control the first and the second laser output unit;a first detecting unit configured to detect an emission timing of the first pulsed laser and output a first detection signal; anda second detecting unit configured to detect an emission timing of the second pulsed laser and output a second detection signal, whereinthe laser controlling unit controls output of at least one of the first and the second laser output unit, based on a time difference between the first and the second detection signals.2. The apparatus according to claim 1 , whereinthe laser controlling unit controls output of at least one of the first and the second laser output unit so as to decrease a time difference between subsequent first and second pulsed lasers to be irradiated to the object.3. The apparatus according to claim 1 , whereinthe laser controlling unit controls a temperature of a laser medium of the first laser output unit or the second laser output unit.4. The apparatus according to claim 1 , whereinthe laser controlling unit controls the emission timings of the first and ...

Self-automatic gain control distributed raman fiber amplifier and automatic gain control method

Disclosed is a self-automatic gain control distributed Raman fiber amplifier, in which a signal is transmitted to a self-AGC monitor and a PD via a pump/signal combiner through a transmission fiber and passes through an RFA control circuit, a self-AGC firmware, and an ASCII communication unit and an Raman pump laser module communicates with the RFA control circuit and transmits the signal to the pump/signal combiner.

ONLINE CALIBRATION FOR REPETITION RATE DEPENDENT PERFORMANCE VARIABLES

Online calibration of laser performance as a function of the repetition rate at which the laser is operated is disclosed. The calibration can be periodic and carried out during a scheduled during a non-exposure period. Various criteria can be used to automatically select the repetition rates that result in reliable in-spec performance. The reliable values of repetition rates are then made available to the scanner as allowed values and the laser/scanner system is then permitted to use those allowed repetition rates. 1. A system comprising:a laser;a laser control unit operatively connected to the laser for controlling the laser to scan through a plurality of scanned repetition rates;a measurement unit arranged to measure an output from the laser for measuring at least one operating parameter of the laser for at least some of the scanned repetition rates, the operating parameter being laser gain or laser efficiency; andan evaluation unit operatively connected to the measurement unit for making a determination of whether a measured value for the operating parameter is within a predetermined range of values for the operating parameter for the at least some of the scanned repetition rates and providing an indication of the result of the determination,the laser control unit being operatively connected to the evaluation unit and configured to permit or recommend operation of the laser at one of the scanned repetition rates only if the value stored in association with the scanned repetition rate indicates that the operating parameter was measured to be within the predetermined range for that scanned repetition rate.2. A system as claimed in wherein the laser control unit operatively connected to the laser for driving the laser to scan through a plurality of repetition rates is configured to step the laser through a series of repetition rates where the difference in repetition rate between steps is maintained substantially constant.3. A system as claimed in wherein the laser ...

SOLID-STATE LASER DEVICE, SOLID-STATE LASER SYSTEM, AND LASER DEVICE FOR EXPOSURE DEVICE

A solid state laser device includes a seed laser that outputs continuous wave laser seed light, a light intensity changeable unit that changes a light intensity thereof and outputs seed pulse light, a CW excitation laser that outputs continuous wave excitation light, an amplifier that amplifies the seed pulse light and outputs amplified light based on an amplification gain increased by the excitation light, a wavelength conversion unit that converts a wavelength of the amplified light and outputs harmonic light, and a light intensity control unit that allows the light intensity changeable unit to output the seed pulse light after a certain time elapsed from an input of an external trigger signal each time the signal is input and output suppression light that suppresses an increase of the amplification gain in a period after an output of the seed pulse light until an input of a next external trigger signal. 1. A solid state laser device comprising:a seed laser configured to output seed light that is continuous wave laser light;a light intensity changeable unit configured to change a light intensity of the seed light to make the seed light pulsed and output the pulsed seed light as seed pulse light;a CW excitation laser configured to output continuous wave excitation light;an amplifier configured to amplify the seed pulse light and output the amplified seed pulse light as amplified light, based on an amplification gain increased by light excitation by the continuous wave excitation light;a wavelength conversion unit configured to convert a wavelength of the amplified light and output harmonic light; anda light intensity control unit configured to control the light intensity changeable unit according to an input of an external trigger signal, the light intensity control unit allowing the light intensity changeable unit to output the seed pulse light after a certain time elapsed from an input of the external trigger signal each time the external trigger signal is input, ...

AN OPTICAL PLURAL-COMB GENERATOR, A METHOD OF GENERATING AN OPTICAL PLURAL COMB, AND A PLURALITY OF MODE LOCKED LASERS THAT ARE MECHANICALLY COUPLED AND OPTICALLY INDEPENDENT

An optical plural-comb generator comprising a plurality of mode-locked lasers that are mechanically coupled and optically independent. The optical plural-comb generator comprises an optical combiner optically coupled to an output of each of the plurality of mode-locked lasers for combining a plurality of optical combs when generated by the plurality of mode-locked lasers. 1. An optical plural-comb generator comprising:a plurality of mode-locked lasers that are mechanically coupled and optically independent; andan optical combiner optically coupled to an output of each of the plurality of mode-locked lasers for combining a plurality of optical combs when generated by the plurality of mode-locked lasers.2. An optical plural-comb generator defined by wherein the plurality of mode-locked lasers are cooperatively configured for externally generated mechanical perturbations to be synchronous for the plurality of mode-locked laser.3. An optical plural-comb generator defined by claim 1 , wherein the plurality of mode-locked lasers are cooperatively arranged for externally generated vibrations to be synchronous for the plurality of mode-locked lasers.4. An optical plural-comb generator defined by claim 1 , wherein the plurality of mode-locked lasers are cooperatively arranged such that the length of an optical resonator of each of the plurality of mode-locked lasers change at the same time and by the same amount in response to an externally generated vibration.5. An optical plural-comb generator defined by claim 1 , configured to eschew coupling of the optical comb from one the plurality of mode locked lasers to another of one of the plurality of mode locked lasers.6. An optical plural-comb generator defined by claim 1 , wherein each of the plurality of mode-locked lasers comprise a waveguide formed in a piece of solid-state laser gain material common to the plurality of mode-locked lasers.7. An optical plural-comb generator defined by wherein the effective length of an ...

ADDITIVE MANUFACTURING IN METALS WITH A FIBER ARRAY LASER SOURCE AND ADAPTIVE MULTI-BEAM SHAPING

A system for LAM that uses a scalable array of individually controllable laser beams that are generated by a fiber array system to process materials into an object using a powder bed, wire feed, or direct deposition. The adaptive control of individual beams may include beam power, focal spot width, centroid position, scanning orientation, amplitude and frequency, piston phase and polarization states of individual beams. These characteristics can be independently adjusted to control LAM characteristics including microstructure, mechanical and surface quality characteristics. The system may also have a set of material sensors that gather information on a material and environment immediately before, during, and immediately after processing. This information can be used to adapt the material processing routine to improve LAM productivity and parts quality. The system also supports a variety of beam shaping methods that improve the quality of produced objects or mitigate processing issues. 1. An additive manufacturing system comprising:(a) a manufacturing surface comprising a material and a target object; (i) a fiber array laser head comprising a set of fiber-based laser transmitters, and', '(ii) a multi-channel optical power amplifier system comprising one or more controllers, the multi-channel optical power amplifier system operable to provide laser power to each of the set of fiber-based laser transmitters, and to provide control signals to generate and modify spatiotemporal laser power distribution formed by the set of laser beams at the material;, '(b) a laser transmitter module operable to produce a set of laser beams to heat the material, comprising(c) a beam rastering system operable to position the set of laser beams relative to the target object;(d) a beam rastering controller, wherein the beam rastering controller is communicatively coupled with the laser transmitter module and the beam rastering system; (i) receive a target object definition, the target ...

SPECTRAL FEATURE CONTROL APPARATUS

A spectral feature selection apparatus includes a dispersive optical element arranged to interact with a pulsed light beam; three or more refractive optical elements arranged in a path of the pulsed light beam between the dispersive optical element and a pulsed optical source; and one or more actuation systems, each actuation system associated with a refractive optical element and configured to rotate the associated refractive optical element to thereby adjust a spectral feature of the pulsed light beam. At least one of the actuation systems is a rapid actuation system that includes a rapid actuator configured to rotate its associated refractive optical element about a rotation axis. The rapid actuator includes a rotary stepper motor having a rotation shaft that rotates about a shaft axis that is parallel with the rotation axis of the associated refractive optical element. 1. A spectral feature selection apparatus comprising:a dispersive optical element;a beam expander including a plurality of prisms arranged in a path between the dispersive optical element and an aperture; andat least one actuation system comprising a rapid actuator including a rotatable shaft to which a prism in the beam expander is fixed; the dispersive optical element and the beam expander are arranged such that a light beam interacts with the aperture, the beam expander, and the dispersive optical element along an optical path that lies in an XY plane of the apparatus;', 'the rotatable shaft is configured to rotate about a shaft axis that is perpendicular to the XY plane and thereby causing the prism to rotate about a prism axis that is parallel with the shaft axis; and', 'the rapid actuator lacks mechanical memory and lacks an energy ground state., 'wherein2. The spectral feature selection apparatus of claim 1 , further comprising a control system connected to the actuation system claim 1 , and configured to send a signal to the actuation system instructing the rapid actuator to rotate the ...

LASER LIGHT-SOURCE APPARATUS AND LASER PULSE LIGHT GENERATING METHOD

A laser light-source apparatus includes: fiber amplifiers and a solid state amplifier configured to amplify pulse light output from a seed light source based on gain switching; nonlinear optical elements configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element configured to permit or stop propagation of pulse light from the fiber amplifier to the solid state amplifier; and a control unit configured to control the optical switching element in such a manner that the propagation of the light is stopped in an output period of the pulse light from the seed light source, and permitted in a period other than the output period of the pulse light from the seed light source. 19.-. (canceled)10. A laser light-source apparatus comprising:a seed light source configured to output pulse light based on gain switching;a fiber amplifier configured to amplify the pulse light output from the seed light source;a solid state amplifier configured to amplify the pulse light output from the fiber amplifier;a nonlinear optical element configured to perform wavelength conversion on the pulse light output from the solid state amplifier and output the resultant pulse light;an optical switching element that is disposed between the fiber amplifier and the solid state amplifier, and is configured to permit or stop propagation of light from the fiber amplifier to the solid state amplifier; anda control unit configured to control the optical switching element in such a manner that the propagation of the light is stopped in an output period of the pulse light from the seed light source, and permitted in a period other than the output period of the pulse light from the seed light source to achieve an output stopped state in which the output of the pulse light from the nonlinear optical element is stopped.11. The laser light-source apparatus according to claim 10 , wherein the control unit is configured to periodically or ...

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

A system includes a master oscillator configured to generate a low-power optical beam. The system also includes a planar waveguide (PWG) amplifier configured to receive the low-power optical beam and generate a high-power optical beam having a power of at least about ten kilowatts. The PWG amplifier includes a single laser gain medium configured to generate the high-power optical beam. The single laser gain medium can reside within a single amplifier beamline of the system. The master oscillator and the PWG amplifier can be coupled to an optical bench assembly, and the optical bench assembly can include optics configured to route the low-power optical beam to the PWG amplifier and to route the high-power optical beam from the PWG amplifier. The PWG amplifier could include a cartridge that contains the single laser gain medium and a pumphead housing that retains the cartridge. 1. A method comprising:generating a low-power optical beam using a master oscillator; andamplifying the low-power optical beam to generate a high-power optical beam using a planar waveguide (PWG) amplifier;wherein the high-power 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 the master oscillator and the PWG amplifier are coupled to an optical bench assembly claim 1 , the optical bench assembly further comprising optics configured to route the low-power optical beam to the PWG amplifier and to route the high-power optical beam from the PWG amplifier.4. The method of claim 1 , wherein:the PWG amplifier comprises (i) a cartridge that contains the single laser gain medium and (ii) a pumphead housing that retains the cartridge; andthe pumphead housing is coupled to input and output optics assemblies in order to maintain optical alignment.5. The method of claim 1 , ...

LASER SYSTEM

The laser system may include a delay circuit unit, first and second trigger-correction units, and a clock generator. The delay circuit unit may receive a trigger signal, output a first delay signal obtained by delaying the trigger signal by a first delay time, and output a second delay signal obtained by delaying the trigger signal by a second delay time. The first trigger-correction unit may receive the first delay signal and output a first switch signal obtained by delaying the first delay signal by a first correction time. The second trigger-correction unit may receive the second delay signal and output a second switch signal obtained by delaying the second delay signal by a second correction time. The clock generator may generate a clock signal that is common to the delay circuit unit and the first and second trigger-correction units. 1. A laser system comprising:laser apparatuses configured to emit respective pulse laser beams;a beam bundling device configured to bundle the pulse laser beams each emitted from a corresponding laser apparatus of the laser apparatuses and to emit a bundled laser beam to an exposure apparatus; and receive target energy of the bundled laser beam and target pulse waveform of the bundled laser beam from the exposure apparatus,', 'calculate target pulse energy for each of the pulse laser beams emitted from the corresponding laser apparatus based on the target energy of the bundled laser beam,', 'calculate target delay time for each of the pulse laser beams emitted from the corresponding laser apparatus based on the target pulse waveform of the bundled laser beam, and', 'send, to the corresponding laser apparatus, the target pulse energy for a corresponding pulse laser beam of the pulse laser beams emitted from the corresponding laser apparatus and the target delay time for the corresponding pulse laser beam emitted from the corresponding laser apparatus., 'a laser system controller configured to'}2. The laser system according to claim ...

OPTICAL ARRANGEMENT

The invention relates to an optical arrangement having 2. Optical arrangement according to claim 1 , characterized by two or more spatially separated optical elements claim 1 , wherein one of the partial beams each propagates through each of the optical elements.3. Optical arrangement according to claim 2 , characterized in that the optical elements are optical fibers claim 2 , wherein each of the fibers conducts one of the partial beams each.4. Optical arrangement according to claim 1 , characterized in that the at least one optical element is an optical amplifier claim 1 , a nonlinear optical element for spectral broadening claim 1 , a mirror claim 1 , a light modulator or a lens.5. Optical arrangement according to claim 1 , characterized by at least one phase matching element arranged in beam direction upstream or downstream of the optical element claim 1 , said phase matching element influencing the phase of the radiation from at least one partial beam.6. Optical arrangement according to claim 5 , characterized in that the phase matching element is a phase modulator which varies the phase of pulses from light pulse to light pulse.7. Optical arrangement according to claim 1 , characterized in that the combination element comprises two or more beam splitters arranged one behind the other in beam direction.8. Optical arrangement according to claim 7 , characterized in that the light pulses pass through delay sections between the beam splitters.9. Optical arrangement according to claim 8 , characterized in that log(N) delay sections are provided for N pulses.10. Optical arrangement according to claim 8 , characterized in that the delay sections have different lengths.11. Optical arrangement according to claim 8 , characterized by at least one adjusting element suitable for adjusting the length of a delay section allocated to this adjusting element.12. Optical arrangement according to claim 7 , characterized in that the beam splitters are polarization beam splitters ...

POLARIZED FIBER-LASER

A fiber-laser includes a gain-fiber in a laser-resonator. A polarizer is located in the laser-resonator at an end thereof, causing the output of the fiber-laser to be linearly polarized. A wavelength-selective element is also included in the laser-resonator for selecting an output wavelength of the fiber-laser from within a gain-bandwidth of the gain-fiber. 1. Fiber-laser apparatus , comprising:a laser-resonator including a gain-fiber, the laser-resonator terminated at first and second ends thereof by respectively first and second reflectors;a pump-radiation source arranged to provide pump-radiation to the gain-fiber and cause the resonator to deliver laser-radiation;a polarizer located between one of the reflectors and the gain-fiber, the polarizer arranged to cause the laser-radiation delivered from the laser-resonator to be linearly-polarized; anda wavelength-selective device located in the laser-resonator for selecting the wavelength of the delivered radiation from within a gain-bandwidth of the gain-fiber.2. The apparatus of claim 1 , further including a waveplate located between the polarizer and the gain-fiber.3. The apparatus of claim 2 , wherein the waveplate has a retardance greater than or equal to a quarter wave.4. The apparatus of claim 3 , wherein the waveplate is a half-waveplate.5. The apparatus of claim 1 , wherein the polarizer selects an eigen polarization of the resonator.6. The apparatus of claim 1 , wherein the polarizer is a cube-prism polarizer.7. The apparatus of claim 1 , wherein the gain-fiber is not polarization maintaining.8. The apparatus of claim 1 , wherein the gain-fiber is a single-mode gain-fiber.9. The apparatus of claim 1 , wherein the gain-fiber is a ytterbium-doped fiber.10. The apparatus of claim 1 , wherein one of the reflectors is a fiber Bragg grating.1105. The apparatus of claim 10 , wherein the fiber Bragg grating has a reflection bandwidth of about . nm or less.12. The apparatus of claim 1 , further including an ...

Laser processing apparatus and laser processing method

A laser processing apparatus includes a laser beam generating device that generates a first pulse laser beam for temporarily increasing a light absorptance in a predetermined region of a processing object, and a second pulse laser beam to be absorbed in the predetermined region in which the light absorptance has temporarily increased, and a support portion that is provided on a downstream of the first pulse laser beam and the second laser beam generated by the laser beam generating device and has a placement surface for placing the processing object. The laser beam generating device emits the second pulse laser beam with a delay with respect to the first pulse laser beam by a delay time within a predetermined period of time before the light absorptance that has temporarily increased in the predetermined region returns to an original value.

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.

PHASED ARRAY LIDAR TRANSMITTING CHIP OF MIXED MATERIALS, MANUFACTURING METHOD THEREOF, AND LIDAR DEVICE

The present disclosure provides a phased array LiDAR transmitting chip of mixed materials, a manufacturing method thereof, and a LiDAR device. The phased array LiDAR transmitting chip of mixed materials includes: a first material structure layer and an SOI silicon waveguide structure layer, the first material structure layer is optically connected to the SOI silicon waveguide structure layer through a coupling connection structure; the first material structure layer is configured to couple input light into the chip; the coupling connection structure is configured to split a light wave coupled to the chip, and couple each of split light waves into a corresponding silicon waveguide in the SOI silicon waveguide structure layer; where a non-linear refractive index of the first material in the first material structure layer is lower than a non-linear refractive index of silicon material. 1. A phased array light detection and ranging (LiDAR) transmitting chip of mixed materials , comprising: a first material structure layer and an SOI silicon waveguide structure layer , wherein an overlapping region of a rear end of the first material structure layer and a front end of the SOI silicon waveguide structure layer forms a coupling connection structure;the first material structure layer is optically connected to the SOI silicon waveguide structure layer through the coupling connection structure;the first material structure layer is configured to couple input light to the chip;the coupling connection structure is configured to split a light wave coupled into the chip, and couple each of split light waves into a corresponding silicon waveguide in the SOI silicon waveguide structure layer; anda non-linear refractive index of a first material in the first material structure layer is lower than a non-linear refractive index of a silicon material.2. The phased array LiDAR transmitting chip of mixed materials according to claim 1 , wherein the SOI silicon waveguide structure layer ...

CO2 Laser

Efficient laser diode excited Thulium (Tm) doped solid state systems, directly matched to a combination band pump transition of Carbon Dioxide (CO 2 ), have matured to the point that utilization of such in combination with CO 2 admits effectively a laser diode pumped CO 2 laser. The laser diode excited Tm solid state pump permits Continuous Wave (CW) or pulsed energy application. Appropriate optical pumping admits catalyzer free near indefinite gas lifetime courtesy of the absence of significant discharge driven dissociation and contamination. As a direct consequence of the preceding arbitrary multi isotopologue CO 2 , symmetric and asymmetric, gas mixes may be utilized without significant degradation or departure from initial mix specifications. This would admit, at raised pressure, a system continuously tunable from ˜9 μm to ˜1.5 μm, or sub picosecond amplification. This methodology offers advantages in regards scalability, pulse energy and power over alternative non linear conversion techniques in access to this spectral region.

SPECTRAL FEATURE SELECTION AND PULSE TIMING CONTROL OF A PULSED LIGHT BEAM

A method includes driving, while producing a burst of pulses at a pulse repetition rate, a spectral feature adjuster among a set of discrete states at a frequency correlated with the pulse repetition rate; and in between the production of the bursts of pulses (while no pulses are being produced), driving the spectral feature adjuster according to a driving signal defined by a set of parameters. Each discrete state corresponds to a discrete value of a spectral feature. The method includes ensuring that the spectral feature adjuster is in one of the discrete states that corresponds to a discrete value of the spectral feature of the amplified light beam when a pulse in the next burst is produced by adjusting one or more of: an instruction to the lithography exposure apparatus, the driving signal to the spectral feature adjuster, and/or the instruction to the optical source. 1. A method comprising:producing a burst of pulses of an amplified light beam at a pulse repetition rate and directing the pulses to a lithography exposure apparatus;while producing the pulse burst, driving a spectral feature adjuster among a set of discrete states at a frequency correlated with the pulse repetition rate, with each discrete state corresponding to a discrete value of the spectral feature of the amplified light beam out of a plurality of pre-set discrete values of the spectral feature, such that, each time a pulse in the burst is being produced, the spectral feature adjuster is in one of the discrete states and the amplified light beam pulse has a spectral feature that corresponds to that discrete state;in between the production of the bursts of pulses and while no pulses are being produced, driving the spectral feature adjuster in a manner that is related to information received from the lithography exposure apparatus; andensuring that the spectral feature adjuster is in one of the discrete states that corresponds to a discrete value of the spectral feature of the amplified light ...

SYSTEM AND METHOD FOR GENERATING EXTREME ULTRAVIOLET LIGHT

A system includes a chamber, a laser beam apparatus configured to generate a laser beam to be introduced into the chamber, a laser controller for the laser beam apparatus to control at least a beam intensity and an output timing of the laser beam, and a target supply unit configured to supply a target material into the chamber, the target material being irradiated with the laser beam for generating extreme ultraviolet light. 1. A system comprising:a laser system configured to generate a pre-pulse laser beam with a pulse duration of less than 1 ns, and a main pulse laser beam;a target supply unit configured to supply a target material to be irradiated with the pre-pulse laser beam and the main pulse laser beam for generating extreme ultraviolet light; anda laser controller configured to control the laser system such that a fluence of the pre-pulse laser beam is lower than a fluence of the main pulse laser beam and a beam intensity of the pre-pulse laser beam is higher than a beam intensity of the main pulse laser beam.2. The system according to claim 1 , wherein the controller is configured to control the laser system such that a pulse energy of the pre-pulse laser beam is 0.25 mJ or higher and 2 mJ or lower.3. The system according to claim 1 , wherein the controller is configured to control the laser system such that a delay time from irradiation of the target material with the pre-pulse laser beam to irradiation of the target material with the main pulse laser beam is 0.5 μs or longer and 1.8 μs or shorter.4. The system according to claim 1 , wherein the controller is configured to control the laser system such that a delay time from irradiation of the target material with the pre-pulse laser beam to irradiation of the target material with the main pulse laser beam is 0.7 μs or longer and 1.6 μs or shorter.5. The system according to claim 1 , wherein the controller is configured to control the laser system such that a delay time from irradiation of the target ...

High Energy Broadband Laser System, Methods, and Applications

The present invention demonstrates a technique for achieving milli-joule level and higher energy, broad bandwidth laser pulses centered around 2.4 micrometer with a kilohertz and other repetition rate. The key to such technique is to start with a broadband micro-joule level seed laser at around 2.4 micrometer, which could be generated through difference frequency generation, four-wave mixing process and other methods. This micro-joule level seed laser could then be amplified to above one milli-joule through chirped pulse amplification in a Cr2+:ZnSe or Cr2+:ZnS crystal pumped by a commercially available Ho:YAG or other appropriate suitable lasers. Due to the high seed energy, fewer gain passes are needed to achieve a milli-joule level output thus significantly simplifies laser architectures. Furthermore, gain narrowing effect in a typical chirped pulse amplifier is also mitigated and thus enable a broadband output. 1. A method for creating broadband high energy laser pulses centered around 2.4 μm , comprising:a. generating broadband laser seed pulses having a bandwidth of at least 350 nm centered around 2.4 μm and an energy level of at least 10 μJ;b. amplifying the laser seed pulses to an energy greater than one milli-joule; andc. producing laser output pulses having a bandwidth as close as the input and with an energy of at least one milli-joule.2. The method of claim 1 , comprising amplifying the micro-joule level laser seed pulses to an energy of at least one milli-joule by chirped pulse amplification in a Cr:ZnSe or Cr:ZnS crystal.3. The method of claim 2 , comprising pumping the Cr:ZnSe or Cr:ZnS crystal by a pump laser having a spectral output from 1.3 μm to 2.2 μm.4. The method of claim 3 , wherein the pump laser is a Ho:YAG pump laser.5. The method of claim 1 , comprising amplifying the laser seed pulses in a single amplifier stage having a gain equal to or less than 10.6. The method of claim 1 , comprising generating the broadband laser seed pulses by one ...

BURST-MODE CHIRPED PULSE AMPLIFICATION METHOD

A method for increasing the MeV hot electron yield and secondary radiation produced by short-pulse laser-target interactions with an appropriately high or low atomic number (Z) target. Secondary radiation, such as MeV x-rays, gamma-rays, protons, ions, neutrons, positrons and electromagnetic radiation in the microwave to sub-mm region, can be used, e.g., for the flash radiography of dense objects. 1. A burst-mode chirped pulse amplification method , comprising:providing a burst generator;utilizing said burst generator to produce a series of amplified stretched-duration pulses from a single short-duration pulse; anddirecting said series of amplified stretched-duration pulses through a pulse compressor to produce a series of amplified short-duration output pulses, wherein each amplified stretched-duration output pulse of said series of amplified stretched-duration pulses is delayed from its immediately preceding amplified stretched-duration output pulse by a delay time that is sufficiently long such that the total optical fluence of said series of amplified stretched-duration pulses that can pass through and not damage said pulse compressor is greater than the minimum optical fluence of a single pulse that would damage said pulse compressor.2. The method of claim 1 , wherein the step of utilizing a burst generator comprises:providing said single short-duration pulse;directing said single short-duration pulse through said burst generator to produce a series of short-duration pulses, wherein each short-duration pulse of said series of short-duration pulses is delayed from its immediately preceding short-duration pulse by said delay time;directing said series of short-duration pulses through a pulse stretcher to produce a series of stretched-duration pulses; anddirecting said series of stretched-duration pulses through an optical amplifier, all during the same gain lifetime of said optical amplifier, to produce said series of amplified stretched-duration pulses, wherein ...

LASER MODULE AND LASER SYSTEM INCLUDING THE SAME

Provided is a laser module that receives a first laser beam and outputs a second laser beam different from the first laser beam, the laser module including an optical system configured to modulate the first laser beam into the second laser beam and output the second laser beam, a first mirror disposed on an optical path of the first or second laser beam defined in the laser module, the first mirror reflecting the first laser beam to the optical system, a first sensor disposed adjacent to the first mirror and configured to sense the first laser beam incident to the first mirror, a second mirror disposed on the optical path to reflect the second laser beam to an outside of the laser module, and a first driver connected to the second mirror and configured to rotate the second mirror. 1. A laser module , which receives a first laser beam and outputs a second laser beam different from the first laser beam , the laser module comprising:an optical system configured to modulate the first laser beam into the second laser beam and output the second laser beam;a first mirror disposed on an optical path of the first or second laser beam defined in the laser module, the first mirror reflecting the first laser beam to the optical system;a first sensor disposed adjacent to the first mirror and configured to sense the first laser beam incident to the first mirror;a second mirror disposed on the optical path to reflect the second laser beam to an outside of the laser module; anda first driver connected to the second mirror and configured to rotate the second mirror.2. The laser module of claim 1 , wherein the optical system includes at least one among a pulse stretcher claim 1 , an amplifier claim 1 , or a pulse compressor.3. The laser module of claim 1 , wherein the second laser beam is different from the first laser module in at least one among a pulse width claim 1 , a pulse spectrum claim 1 , intensity claim 1 , or a polarization direction.4. The laser module of claim 1 , ...

LITHOGRAPHY SYSTEM BANDWIDTH CONTROL

Methods and apparatus for controlling laser firing timing and hence bandwidth in a laser capable of operating at any one of multiple repetition rates. 1. Apparatus comprising:a laser configured to operate at a first repetition rate selected from a plurality of repetition rates at which the laser is capable of operating;a comparison module adapted to determine if the first repetition rate is substantially the same as a second repetition rate used immediately prior by the laser; anda control module adapted to alter a control parameter of the laser if the comparison module determines that the first repetition rate is not substantially the same as the second repetition rate.2. Apparatus as claimed in wherein the laser has a first chamber and a second chamber and wherein the control parameter is a timing parameter DtMOPA relating to a timing of firing in the second chamber relative to a timing of firing in the first chamber.3. Apparatus as claimed in wherein the laser has a first chamber and a second chamber and wherein the control parameter is a moving average of a timing parameter DtMOPA relating to a timing of firing in the second chamber relative to a timing of firing in the first chamber.4. Apparatus as claimed in further comprising a timing module adapted to determine an amount of elapsed time since the second repetition rate used was substantially the same as the first repetition rate; and wherein the control module is additionally adapted to alter the control parameter at least partially on the basis of the amount of elapsed time as determined by the timing module.5. Apparatus as claimed in wherein the control module is further adapted to alter the control parameter at least partially on the basis of the amount of elapsed time by altering a feedforward gain.6. Apparatus as claimed in further comprising a correlator including a memory claim 1 , the memory being adapted to store feedforward correlation data correlating a value of the control signal to each of the ...

SYSTEM AND METHOD FOR SPECTRAL LINE SHAPE OPTIMIZATION FOR SPECTRAL BEAM COMBINING OF FIBER LASERS

A system includes at least one controller configured to determine an optical phase modulation pattern for suppression of stimulated Brillouin scattering (SBS) in a combined beam that emerges off a diffractive grating in a spectral beam combining (SBC) system and maximization of an output power of the combined beam. The system also includes multiple master oscillators configured to generate multiple beams in the SBC system. The system also includes multiple phase modulators configured to phase modulate the multiple beams according to the determined optical phase modulation pattern. The system also includes multiple fiber amplifier chains configured to receive the phase modulated beams and output the beams from the master oscillators to multiple delivery fibers for subsequent combining into the combined beam at the diffractive grating. 1. A system comprising:at least one controller configured to determine an optical phase modulation pattern for suppression of stimulated Brillouin scattering (SBS) in a combined beam that emerges off a diffractive grating in a spectral beam combining (SBC) system and maximization of an output power of the combined beam;multiple master oscillators configured to generate multiple beams in the SBC system;multiple phase modulators configured to phase modulate the multiple beams according to the determined optical phase modulation pattern; andmultiple fiber amplifier chains configured to receive the phase modulated beams from the master oscillators and output the beams to multiple delivery fibers for subsequent combining into the combined beam at the diffractive grating.2. The system of claim 1 , wherein the at least one controller is further configured to determine the optical phase modulation pattern for maximization of a beam quality factor of the combined beam that emerges off the diffractive grating.3. The system of claim 1 , wherein to phase modulate the multiple beams claim 1 , the multiple phase modulators are configured to produce ...

Raman Pump Laser Control Apparatus And Control Method Therefor

A Raman pump laser control apparatus comprises a wavelength division multiplexer, a tap coupler, a photoelectric detector, an analogue amplification processing circuit, an analogue-to-digital converter, a fast Raman pump control unit, an digital-analog converter, and a Raman pump laser. The fast Raman pump control unit, after having known anticipated output light power of the Raman pump laser, based on a direct relationship between a current anticipated output light power of the Raman pump laser and input digital quantity that is needed by the digital-analog converter, uses a feedforward control mechanism so that actual output light power of the Raman pump laser fastly approximates the anticipated output light power thereof, and then synchronously combines with a feedback control mechanism so that the actual output light power of the Raman pump laser is precisely locked on the anticipated output light power, thereby achieving fast and precise control of the Raman pump laser. 1. A control device of Raman pump laser , comprising a wavelength division multiplexer , a tap coupler , a photoelectric detector , an analog amplifier processing circuit , an analog-digital converter , a fast Raman pump control unit , a digital-analog converter , and a Raman pump laser ,wherein the wavelength division multiplexer couples the pump light output from the tap coupler with signal light;the tap coupler splits the pump light, one part of light energy of the split light is coupled into the wavelength division multiplexer, and another part enters into the photoelectric detector,the photoelectric detector detects the split light output from the tap coupler,the analog amplifier processing circuit performs amplification processing on the analog signal detected by the photoelectric detector,the analog-digital converter converts the analog signal processed by the analog amplifier processing circuit into digital signal,the fast Raman pump control unit performs data processing on digital ...

Optical amplifier and control method thereof

In an optical amplifier, the excitation light level of an excited laser diode decreases, or, when the output of an excitation light is stopped, a backup excited laser diode is operated, and therefore the current consumption increases. [Solution] This optical amplifier is provided with multiple excitation laser diodes, a first current control element, a second current control element, and control means. The excitation laser diodes oscillate excitation light, the excitation light being inputted to an optical fiber amplifier. The first current control element controls a current flowing in the excitation laser diodes. The second current control element controls a current flowing in at least one of the excitation laser diodes. The control means controls the first current control element and the second current control element.

Compact, thermally stable multi-laser engine

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

LASER APPARATUS

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

Deep ultra-violet light sources for wafer and reticle inspection systems

Disclosed are methods and apparatus for generating a sub-208 nm laser. A laser apparatus includes one or more seed radiation sources for generating a first radiation beam having a first fundamental wavelength on a first optical path and a second radiation beam having a second fundamental wavelength on a second optical path, a first amplifier for amplifying the first radiation beam, a second amplifier for amplifying the second radiation beam, and a wavelength conversion module comprising a plurality of crystals for frequency multiplying and mixing the amplified first and second radiation beams to produce an output beam at a fifth harmonic that is less than about 208 nm.

EXTREME ULTRAVIOLET LIGHT GENERATION SYSTEM

An extreme ultraviolet light (EUV) generation system is configured to improve conversion efficiency of energy of a laser system to EUV energy by improving the efficiency of plasma generation. The EUV generation system includes a target generation unit configured to output a target toward a plasma generation region in a chamber. The laser system is configured to generate a first pre-pulse laser beam, a second pre-pulse laser beam, and a main pulse laser beam so that the target is irradiated with the first pre-pulse laser beam, the second pre-pulse laser beam, and the main pulse laser beam in this order. In addition, the EUV generation system includes a controller configured to control the laser system so that a fluence of the second pre-pulse laser beam is equal to or higher than 1 J/cmand equal to or lower than a fluence of the main pulse laser beam. 1. An extreme ultraviolet light generation system comprising:a chamber;a target generation unit configured to output a target toward a plasma generation region in the chamber;a laser system configured to generate a first pre-pulse laser beam, a second pre-pulse laser beam, and a main pulse laser beam so that the target is irradiated with the first pre-pulse laser beam, the second pre-pulse laser beam, and the main pulse laser beam in this order; anda controller configured to control the laser system so that time lag between a timing of irradiation with the first pre-pulse laser beam and a timing of irradiation with the main pulse laser beam is 0.5 μs or longer and 1.6 μs or shorter, and that time lag between a timing of irradiation with the second pre-pulse laser beam and the timing of irradiation with the main pulse laser beam is 0.03 μs or longer and 0.37 μs or shorter.2. The extreme ultraviolet light generation system according to claim 1 , wherein the controller is configured to control the laser system so that the time lag between the timing of irradiation with the first pre-pulse laser beam and the timing of ...

Comb laser arrays for dwdm interconnects

A photonic integrated circuit package includes two arrays or sets of integrated comb laser modules that are bonded to a silicon interposer. Each comb laser of an array has a common or overlapping spectral range, with each laser in the array being optically coupled to a local optical bus. The effective spectral range of the lasers in each array are different, or distinct, as to each array. An optical coupler is disposed within the silicon interposer and is optically coupled to each of the local optical buses. An ASIC (application specific integrated circuit) is bonded to the silicon interposer and provides control and operation of the comb laser modules.

RFOG RESONANCE HOPPING

Systems and methods for performing resonator fiber optic gyroscope (RFOG) resonance hopping are described herein. For example, an RFOG includes a fiber optic resonator. The RFOG also includes a plurality of laser sources that each launch a respective laser for propagation within the fiber optic resonator. Further, the RFOG includes a threshold detector that determines when the operation of at least one laser source in the plurality of laser sources exceeds a threshold associated with the operational range of an aspect of the at least one laser source. Additionally, the RFOG includes a hop control logic that adjusts the frequency of at least one laser produced by the at least one laser source one or more resonant modes of the fiber optic resonator such that the aspect of the at least one laser moves away from the threshold towards a nominal value within the operational range. 1. A resonator fiber optic gyroscope (RFOG) comprising:a fiber optic resonator;a plurality of laser sources that each launch a respective laser for propagation within the fiber optic resonator;a threshold detector that determines when the operation of at least one laser source in the plurality of laser sources exceeds a threshold associated with the operational range of an aspect of the at least one laser source; anda hop control logic that adjusts the frequency of at least one laser produced by the at least one laser source one or more resonant modes of the fiber optic resonator such that the aspect of the at least one laser moves away from the threshold towards a nominal value within the operational range.2. The RFOG of claim 1 , wherein the hop control logic further:directs one or more control loops for the at least one laser to open when the frequency of the at least one laser is adjusted; anddirects the one or more control loops to close when frequency of the at least one laser is associated with the operational range of the aspect of the at least one laser.3. The RFOG of claim 2 , wherein ...

LASER DEVICE

The invention relates to a laser device, comprising a laser configured to generate laser light and a laser control module configured to receive at least a portion of the laser light generated by the laser, to generate a control signal and to feed the control signal back to the laser for stabilizing the frequency, wherein the laser control module comprises a tunable frequency discriminating element which is preferably continuously frequency tunable, and where the laser control module is placed outside the laser cavity. 139.-. (canceled)40. A sensor comprising a laser device , comprising:a tunable laser configured to generate laser light and a laser control module configured to receive at least a portion of the laser light generated by the laser to generate a control signal and to feed the control signal back to the laser for stabilizing the frequency,wherein the laser comprises a laser cavity and the laser control module comprises a tunable frequency discriminating element which is preferably continuously frequency tunable, and where the laser control module is placed outside the laser cavity,wherein the laser control module is encapsulated inside a hermetically sealed housing.41. The sensor according claim 40 , wherein the tunable laser operates in a single longitudinal mode42. The sensor according to claim 40 , wherein the tunable laser is a fiber laser claim 40 , a diode laser or a solid-state laser43. The sensor according to claim 40 , wherein the frequency discriminating element comprises solid silica44. The sensor according to claim 40 , wherein the laser control module is fiber coupled to the tunable laser.45. The sensor according to claim 40 , wherein the laser control module is temperature controlled46. The sensor according to claim 40 , wherein the frequency discriminating element is an interferometer.47. The sensor according to claim 46 , wherein the interferometer is a Fabry-Perot interferometer.48. The sensor according to claim 46 , wherein the ...

Apparatus and Method For Optical Isolation

Apparatus for optical isolation, which apparatus comprises a laser (), a beam delivery system (), and an output port (), wherein: the beam delivery system () comprises an optical isolator () and an optical fibre (); the laser () is defined by a peak power (); the laser () emits laser radiation () at a signal wavelength (); the laser radiation () is coupled from the laser () to the output port () via the beam delivery system (); and the optical fibre () comprises an optical waveguide () defined by a core (), a cladding (), a mode field area () at the signal wavelength (), a length (), and a Raman wavelength (); and the apparatus being characterised in that: the Raman wavelength () is longer than the signal wavelength (); the beam delivery system () attenuates the laser radiation () at the signal wavelength () such that the power of the laser radiation () emitted by the laser () is more than the power of the laser radiation () at the output port (); the apparatus does not include a pump for pumping the laser radiation () at the signal wavelength () as the laser radiation () propagates along the optical fibre (); the optical isolator () has greater backward optical isolation () and greater forward transmission () at the signal wavelength () compared to the Raman wavelength (); and the optical fibre () comprises a suppressing means () for suppressing stimulated Raman scattering. 2. Apparatus according to wherein the suppressing means is distributed over the length of the optical fibre.3. Apparatus according to wherein the suppressing means comprises high refractive index features which surround the core and which are configured to increase coupling of light into leaky modes at the Raman wavelength compared to coupling of light into leaky modes at the signal wavelength.4. Apparatus according to wherein the suppressing means comprises at least one blazed grating.5. Apparatus according to wherein the suppressing means comprises at least one long-period grating.6. Apparatus ...

Arrangement of Expanding Optical Flows for Efficient Laser Extraction

A set of optical elements for optical extraction composed of packed expanding optical cross sections to efficiently extract from a large gain region. The elements are rectangular shaped concave small expansion lenses matched to rectangular convex collimating lenses. Absorbing sheets divide an overall large volume up into smaller volumes to minimize losses due to amplified spontaneous emission. This arrangement has various applications, particularly in inertial confinement technology, where it may be used to extract energy from KrF laser media energized by electron beams. For certain applications, this regime of the gain medium may have zones at the absorbing sheets where this is no gain. 1. A system for expanding optical flow for laser extraction , comprising:two input beams that roughly counter propagate;two expansion optics to receive each of the two counter propagating input beams;one or more gain mediums to receive the amplified propagating beams from the two expansion optics; andtwo output optics to receive the two amplified propagating beams after passing through the gain medium;wherein the expansion characteristics of the two expansion optics are selected in order to maximize the optical extraction efficiency.2. The system of claim 1 , wherein the expansion optics are one of the following shapes: cylindrical claim 1 , spherical or anamorphic.3. The system of claim 2 , wherein the two input beams are coded during extraction for color claim 2 , angle claim 2 , polarization and power level.4. The system of claim 3 , wherein the one or more gain mediums further comprises a plurality of arrays claim 3 , and wherein the plurality of arrays are separated by an absorbing buffer region to isolate the one or more gain mediums in order to diminish the effects of amplified spontaneous emission.5. The system of claim 4 , wherein the gain medium is selected from one of the following: liquid claim 4 , solid or gaseous.6. The system of claim 5 , further comprises figured ...

LASER SOURCE FOR EMITTING A GROUP OF PULSES

A laser source for emitting a group of pulses, includes a primary laser source suitable for emitting at least one primary laser pulse; at least one interferometer suitable for forming, from the primary laser pulse, a plurality of secondary laser pulses, each interferometer comprising at least one delay line allowing two secondary laser pulses to be temporally separated, by a delay comprised between 50 ps and 10 ns; and a single-mode amplifying optical fiber intended to receive the secondary laser pulses, in order to form as output a group of spatially superposed pulses. 1. A laser source for emitting a group of pulses , comprising:a primary laser source suitable for emitting at least one primary laser pulse,one or more interferometers suitable for forming, from said primary laser pulse, a plurality of secondary laser pulses, each interferometer comprising at least one delay line allowing two secondary laser pulses to be temporally separated by a delay (Δt, Δt′) comprised between 50 ps and 10 ns, said one or more interferometers comprising means for spectrally and/or temporally forming at least one of the secondary laser pulses.a single-mode amplifying optical fiber intended to receive said plurality of secondary laser pulses, in order to form as output a group of spatially superposed pulses.2. The laser source as claimed in claim 1 , wherein at least one of said interferometers comprises means for controlling the relative optical power of the secondary laser pulses.3. The laser source as claimed in claim 1 , furthermore comprising:a stretcher placed upstream of the single-mode amplifying optical fiber such that the primary laser pulse is stretched to a pulse duration longer than 50 ps, anda compressor downstream of the single-mode amplifying optical fiber in order to temporally compress the pulses of the group of pulses such that the pulses of the group of pulses have a pulse duration shorter than 500 fs.4. The laser source as claimed in claim 1 , furthermore ...

OPTICAL AMPLIFIER, OPTICAL COMMUNICATION SYSTEM AND OPTICAL AMPLIFICATION METHOD

An object is to provide an optical amplifier capable of performing Raman amplification while suppressing power consumption and a size. A multicore fiber has a double clad structure. The double clad structure includes a plurality of cores thorough which an optical signal is transmitted and a clad includes the cores. A light source outputs a pump light used for amplifying the optical signal by stimulated Raman scattering in the multicore fiber. The pump light is generated by multiplexing multimode laser lights. A optical coupler couples the pump light into the clad of the multicore fiber. 1. An optical amplifier comprising:a multicore fiber having a double clad structure, the double clad structure including a plurality of cores thorough which an optical signal is transmitted and a clad including the cores;a first light source configured to output a first pump light used for amplifying the optical signal by stimulated Raman scattering in the multicore fiber, the first pump light being generated by multiplexing a plurality of first multimode laser lights, anda first optical coupler configured to couple the first pump light into the clad of the multicore fiber.2. The optical amplifier according to claim 1 , wherein all or a part of spectrums of the first multimode laser lights are overlapped.3. The optical amplifier according to claim 1 , wherein the first multimode laser lights are multiplexed in a wavelength manner or in a modal manner to generate the first pump light.4. The optical amplifier according to claim 1 , whereinthe optical signal is transmitted through the multicore fiber in a first direction, andthe first pump light is transmitted through the multicore fiber in a second direction opposite to the first direction.5. The optical amplifier according to claim 4 , wherein the first optical coupler is disposed at a first end of the multicore fiber claim 4 , the optical signal transmitted and amplified through the multicore fiber is output from the first end of the ...

HIGH POWER LASER ARRAY DEVICES AND METHODS

In one example, an optoelectronic assembly may include a laser array, an amplifier array, and a multimode interference coupler optically coupling the laser array and the amplifier array. The laser array may include at least one primary laser and at least one spare laser configured to be activated if the primary laser fails. The amplifier array may include at least two amplifiers configured to amplify optical signals received from the laser array. 1. An optoelectronic assembly comprising:a laser array including at least one primary laser and at least one spare laser configured to be activated if the primary laser fails;an amplifier array including at least two amplifiers configured to amplify optical signals received from the laser array; anda multimode interference coupler optically coupling the laser array and the amplifier array.2. The optoelectronic assembly of claim 1 , the multimode interference coupler comprising a quantum well intermixing region that is transparent to wavelengths of light generated by the laser array.3. The optoelectronic assembly of claim 2 , wherein the quantum well intermixing region is integrally formed on a single optoelectronic chip with the laser array claim 2 , the multimode interference coupler and the amplifier array.4. The optoelectronic assembly of claim 1 , wherein the laser array claim 1 , the multimode interference coupler and the amplifier array are included on a single optoelectronic chip.5. The optoelectronic assembly of claim 1 , wherein the multimode interference coupler splits the optical signals from the laser array such that the optical signals travel to each of the amplifiers of the amplifier array.6. The optoelectronic assembly of claim 5 , wherein each of the split optical signals traveling to each of the amplifiers are substantially the same.7. The optoelectronic assembly of claim 1 , wherein the laser array includes at least two primary lasers claim 1 , and the multimode interference coupler multiplexes the optical ...

Holography using a double-end-emitting fiber laser

In some examples, a system may be configured to generate a holographic image of an object. The system may include a holographic recording medium and a fiber laser. The fiber laser may be configured to generate a first output beam at a first end of an optical fiber of the fiber laser. The fiber laser may be further configured to generate a second output beam at a second end of the optical fiber. The first output beam may be configured to be directed toward the object as an illumination beam for the holographic image of the object. Additionally, the second output beam may be configured to be directed toward the holographic recording medium as a reference beam for the holographic image.

OPTICAL PULSE COMBINER COMPRISING DIFFRACTIVE OPTICAL ELEMENTS

This disclosure provides systems, methods, and apparatus related to optical systems. In one aspect, an optical system includes a plurality of optical sources, a first diffractive optical element, and a second diffractive optical element. The plurality of optical sources generates a plurality of pulsed beams that is less than about 1 picosecond in duration. The first diffractive optical element receives and diffracts the plurality of pulsed beams. The second diffractive optical element receives the diffracted plurality of pulsed beams and generates a combined pulsed beam. 1. An optical system comprising:a plurality of optical sources, the plurality of optical sources to generate a plurality of pulsed beams that is less than about 1 picosecond in duration;a first diffractive optical element, the first diffractive optical element to receive and to diffract the plurality of pulsed beams; anda second diffractive optical element, the second diffractive optical element to receive the diffracted plurality of pulsed beams and to generate a combined pulsed beam.2. The optical system of claim 1 , wherein the plurality of optical sources comprises fiber lasers.3. The optical system of claim 1 , wherein the plurality of pulsed beams is about 10 femtoseconds to 500 femtoseconds in duration.4. The optical system of claim 1 , wherein pulsed beams of the plurality of pulsed beams received by the first diffractive optical element are arranged in a two-dimensional array.5. The optical system of claim 1 , wherein the first diffractive optical element comprises a grating array claim 1 , wherein the grating array includes a plurality of individual gratings claim 1 , and wherein a number of the plurality of individual gratings is equal to a number of the plurality of pulsed beams.6. The optical system of claim 5 , wherein the individual gratings comprise blazed gratings.7. The optical system of claim 1 , wherein the first diffractive optical element induces a pulse front tilt in pulsed ...

Radiation Source

A laser radiation source for a lithographic tool comprising a laser module to emit a first laser beam having a first wavelength and a second laser beam having a second wavelength, a beam separation device to separate the optical paths of the first and second laser beams and substantially recombine the optical paths, a beam delivery system to direct the first and second laser beams to a fuel target and an optical isolation apparatus to: adjust the polarization state of the first laser beam, adjust the polarization state of the second laser beam and to block radiation having the adjusted polarization states such that the reflection of the first laser beam and the reflection of the second laser beam are substantially blocked from propagating towards the laser module. 1. A laser radiation source for a lithographic tool , the laser radiation source comprising:a laser module configured to emit a first laser beam having a first wavelength and a second laser beam having a second wavelength;a beam separation device configured to separate optical paths of the first and second laser beams and substantially recombine the optical paths of the first and second laser beams;a beam delivery system configured to direct the first and second laser beams to be incident on a fuel target; and adjust a polarization state of the first laser beam such that a reflection of the first laser beam from the fuel target has a first polarization state;', 'adjust a polarization state of the second laser beam such that a reflection of the second laser beam from the fuel target has a second polarization state; and', 'block radiation having the first and second polarization states such that the reflection of the first laser beam and the reflection of the second laser beam are substantially blocked from propagating towards the laser module., 'an optical isolation apparatus configured to2. The laser radiation source of claim 1 , wherein the optical isolation apparatus comprises a first polarization ...

RADIATION SYSTEM

A radiation alteration device includes a continuously undulating reflective surface, wherein the shape of the continuously undulating reflective surface follows a substantially periodic pattern. 191.-. (canceled)92. A radiation alteration device comprising a continuously undulating reflective surface , wherein the shape of the continuously undulating reflective surface follows a substantially periodic pattern in two perpendicular directions.93. (canceled)94. The radiation alteration device of claim 92 , wherein a unit cell of the periodic undulating reflective surface comprises:a first portion having a substantially convex shape;a second portion having a substantially concave shape;a third portion having a substantially saddle shape; anda fourth portion having a substantially saddle shape.95. The radiation alteration device of claim 94 , wherein the unit cell comprises a single period of the periodic pattern in a first direction and a single period of the periodic pattern in a second direction perpendicular to the first direction.96. The radiation alteration device of claim 94 , wherein the reflective surface is shaped such within at least one of the first claim 94 , second claim 94 , third and fourth portions claim 94 , the curvature of the reflective surface is substantially the same throughout the respective portion.97. The radiation alteration device of claim 94 , wherein the reflective surface is shaped such that within at least one of the first claim 94 , second claim 94 , third and fourth portions claim 94 , the curvature of the reflective surface is different at different positions in the respective portion.98. The radiation alteration device of claim 92 , wherein the reflective surface is configured to receive a radiation beam and reflect the radiation beam so as to form a modified radiation beam and wherein the reflective surface is shaped such that the modified radiation beam has an intensity distribution in a far field plane claim 92 , the intensity ...

LIGHT DETECTION AND RANGING (LIDAR) SYSTEM USING A WAVELENGTH CONVERTER

Embodiments of the disclosure provide an apparatus for emitting laser light and a system and method for detecting laser light returned from an object. The system includes a transmitter and a receiver. The transmitter includes one or more laser sources, at least one of the laser sources configured to provide a respective native laser beam having a wavelength above 1,100 nm. The transmitter also includes a wavelength converter configured to receive the native laser beams provided by the laser sources and convert the native laser beams into a converted laser beam having a wavelength below 1,100 nm. The transmitter further includes a scanner configured to emit the converted laser beam to the object in a first direction. The receiver is configured to detect a returned laser beam having a wavelength below 1,100 nm and returned from the object in a second direction. 1. An optical sensing system , comprising: a first laser source configured to provide a first laser beam having a first wavelength above 1,100 nm;', 'a second laser source configured to provide a second laser beam having a second wavelength different than the first wavelength;', 'a wavelength converter configured to convert the first laser beam and the second laser beam into a converted laser beam having a third wavelength below 1,100 nm; and', 'a scanner configured to steer the converted laser beam towards an environment in a first direction; and, 'a transmitter, comprising 'wherein the first laser source and the second laser source are separate.', 'detect a returned laser beam having a fourth wavelength below 1,100 nm returned from the environment in a second direction,'}, 'a receiver configured to2. The optical sensing system of claim 1 , wherein one of the first laser source or the second laser source is a fiber laser.3. The optical sensing system of claim 2 , wherein both the first laser source and the second laser source are fiber lasers.4. The optical sensing system of claim 1 , wherein the receiver ...

NOISE REDUCTION APPARATUS AND DETECTION APPARATUS INCLUDING THE SAME

A noise reduction apparatus includes a first delaying/combining unit configured to output first and second pulse light beams, and a second delaying/combining unit configured to branch the first pulse light beam into two pulse light beams to output third and fourth pulse light beams and branch the second pulse light beam into two pulse light beams to output fifth and sixth pulse light beams. 1. A noise reduction apparatus comprising:a first delaying/combining unit configured to branch a pulse light beam of a first period into two pulse light beams, provide a first delay time between the two branched pulse light beams, and combine the two branched pulse light beams, to output a first pulse light beam polarized in a first direction and a second pulse light beam polarized in a direction orthogonal to the first direction and delayed by the first delay time with respect to the first pulse light beam;a second delaying/combining unit configured to branch the first pulse light beam into two pulse light beams, provide a second delay time between the two branched pulse light beams, combine the two branched pulse light beams, to output a third pulse light beam polarized in a second direction and a fourth pulse light beam polarized in a direction orthogonal to the second direction and delayed by the second delay time with respect to the third pulse light beam, branch the second pulse light beam into two pulse light beams, provide the second delay time between the two branched pulse light beams, and combine the two branched pulse light beams, to output a fifth pulse light beam polarized in the second direction and a sixth pulse light beam polarized in a direction orthogonal to the second direction and delayed by the second delay time with respect to the fifth pulse light beam, anda polarization adjustment unit configured to adjust a polarization direction of the first pulse light beam and a polarization direction of the second pulse light beam,wherein the polarization adjustment ...

Single mode propagation in fibers and rods with large leakage channels

Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprise cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

Variable Beam Spacing, Timing, and Power for Vehicle Sensors

The present disclosure relates to systems and methods that facilitate light detection and ranging operations. An example transmit block includes at least one substrate with a plurality of angled facets. The plurality of angled facets provides a corresponding plurality of elevation angles. A set of angle differences between adjacent elevation angles includes at least two different angle difference values. A plurality of light-emitter devices is configured to emit light into an environment along the plurality of elevation angles toward respective target locations so as to provide a desired resolution and/or a respective elevation angle. The present disclosure also relates to adjusting shot power and a shot schedule based on the desired resolution and/or a respective elevation angle. 1. A method comprising:determining a respective beam elevation angle for each light-emitter device of a plurality of light-emitter devices, wherein respective light-emitter devices are coupled to respective die attach locations disposed along a front edge of at least one substrate, and wherein a set of angle differences between beam elevation angles of adjacent light-emitter devices comprises a non-uniform beam elevation angle distribution;determining a desired shot schedule of the plurality of light-emitter devices based on the determined beam elevation angles; andcausing the plurality of light-emitter devices to emit light pulses into an environment according to the desired shot schedule.2. The method of claim 1 , wherein determining the respective beam elevation angle for each light-emitter device of the plurality of light-emitter devices is based on at least one of: a location or an orientation of the light-emitter device on the at least one substrate.3. The method of claim 1 , wherein determining the desired shot schedule is further based on a comparison between the respective beam elevation angles and at least one value based on at least one of: real-time point cloud data or historic ...

Radiation Source

A laser system comprises a seed module ( 33 ) operable to emit a pulse of a first laser beam followed by a pulse of a second laser beam and a plurality of amplification chambers each comprising a gain medium having a gain, wherein the plurality of amplification chambers are arranged to receive the pulse of the first laser beam ( 45 ) and amplify the first laser beam in a second order (PA 3 , PA 2 , PA 1 , PA 0 ) and wherein the plurality of amplification chambers are further arranged to receive the pulse of the second laser beam ( 41 ) and amplify the second laser beam in a first order (PA 0 , PA 1 , PA 2 , PA 3 ) which is the reverse of the second order. Saturation powers and small signal gain coefficients of the gain media are selected such that the pulse of the first laser beam experiences a total amplification which is less than the total amplification experienced by the pulse of the second laser beam.

Bismuth doped fiber amplifier

Bismuth (Bi) doped optical fibers (BiDF) and Bi-doped fiber amplifiers (BiDFA) are shown and described. The BiDF comprises a gain band and an auxiliary band. The gain band has a first center wavelength (λ1) and a first six decibel (6 dB) gain bandwidth. The auxiliary band has a second center wavelength (λ2), with λ2>λ1. The system further comprises a signal source and a pump source that are optically coupled to the BiDF. The signal source provides an optical signal at λ1, while the pump source provides pump light at a pump wavelength (λ3).

Dual output laser diode

A dual output laser diode may include first and second end facets and an active section. The first and second end facets have low reflectivity. The active section is positioned between the first end facet and the second end facet. The active section is configured to generate light that propagates toward each of the first and second end facets. The first end facet is configured to transmit a majority of the light that reaches the first end facet through the first end facet. The second end facet is configured to transmit a majority of the light that reaches the second end facet through the second end facet.

MULTI-BAND SIGNAL PROCESSING SYSTEM, JOINT BOX FOR MULTI-BAND SIGNAL PROCESSING SYSTEM, AND METHOD FOR ACCOMMODATING MULTI-BAND SIGNAL PROCESSING SYSTEM

[Problem] To accommodate single-band signal processing devices in a high-density manner. 1. A multi-band signal processing system comprising:a first signal cable;a second signal cable;a third signal cable;a fourth signal cable;a first multi-band signal processing device configured to process a first signal received from the first signal cable, and output the processed signal as a second signal to the second signal cable;a second multi-band signal processing device configured to process a third signal received from the third signal cable, and output the processed signal as a fourth signal to the fourth signal cable;a first joint box configured to accommodate the first signal cable, the first multi-band signal processing device, the second signal cable and the fourth signal cable; anda second joint box configured to accommodate the second signal cable, the third signal cable, the second multi-band signal processing device and the fourth signal cable.2. The multi-band signal processing system according to claim 1 ,wherein each of the first joint box and the second joint box includes a fitting unit enabling the joint box to be stack-coupled with the other one.3. The multi-band signal processing system according claim 1 ,wherein the first signal cable and the second signal cable are optical fibers.4. The multi-band signal processing system according to claim 1 ,wherein each of the first signal and the third signal includes a C band optical signal and an L band optical signal.5. The multi-band signal processing system according to claim 1 ,wherein each of the first multi-band signal processing device and the second multi-band signal processing device includes:an input-side coupler configured to separate an input signal into a first band component and a second band component;a first single-band signal processing device configured to output a third band component obtained by equalizing the first band component;a second single-band signal processing device configured to ...

LASER AMPLIFIER SYSTEM

A laser amplifier system includes: a fiber-laser pre-amplifier system for pre-amplifying initial laser pulses and outputting pre-amplified laser pulses; an intermediate-compressor for temporally partially compressing the pre-amplified laser pulses; a solid-state post-amplifier for post-amplifying temporally partially compressed pre-amplified laser pulses and for outputting post-amplified laser pulses; and a post-compressor for temporally compressing the post-amplified laser pulses to generate the output laser pulses. 1. A laser amplifier system comprising a two-stage compressor system , the laser amplifier system comprising:a fiber-laser pre-amplifier system to pre-amplify initial laser pulses coupled into the fiber-laser pre-amplifier and to output pre-amplified laser pulses;an intermediate laser pulse compressor to temporally partially compress the pre-amplified laser pulses by at least 30%;a solid-state post-amplifier to post-amplify temporally partially compressed pre-amplified laser pulses from the intermediate laser pulse compressor as and output post-amplified laser pulses; anda post laser pulse compressor to temporally compress the post-amplified laser pulses to generate output laser pulses.2. The laser amplifier system of claim 1 , wherein the fiber-laser pre-amplifier system comprises at least one fiber-laser amplifier with an amplification fiber claim 1 , wherein an amplification process in the amplification fiber requires the pre-amplified laser pulses to have a fiber minimum output laser pulse length claim 1 , T claim 1 , and each of the pre-amplified laser pulses comprises a corresponding first pulse length that is greater than or equal to T claim 1 , and{'sub': min,Fiber out', 'min,FK in, 'the intermediate-compressor stage is configured to compress the first pulse lengths of the pre-amplified laser pulses to second pulse lengths, each second pulse length being shorter than Tand is greater than or equal to a solid-state minimum input pulse length, T, ...

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.

SYSTEM AND METHOD FOR GENERATING EXTREME ULTRAVIOLET LIGHT

A system includes a chamber, a laser beam apparatus configured to generate a laser beam to be introduced into the chamber, a laser controller for the laser beam apparatus to control at least a beam intensity and an output timing of the laser beam, and a target supply unit configured to supply a target material into the chamber, the target material being irradiated with the laser beam for generating extreme ultraviolet light. 1. An extreme ultraviolet light generation system configured to irradiate a target with a first pulse laser beam and a second pulse laser beam to turn the target into plasma thereby generating extreme ultraviolet light , comprising:a chamber having at least one aperture configured to introduce the first pulse laser beam and the second pulse laser beam;a target supply unit configured to supply the target to a predetermined region in the chamber;a first laser apparatus configured to output the first pulse laser beam with which the target in the chamber is irradiated so as to make the target be diffused in a shape having a first length in a direction in which the first pulse laser beam travels and a second length in a direction perpendicular to the direction in which the first pulse laser beam travels, the first length being shorter than the second length; anda second laser apparatus configured to output the second pulse laser beam with which the target which has been irradiated with the first pulse laser beam is further irradiated.2. The extreme ultraviolet light generation system according to claim 1 , wherein a fluence of the second pulse laser beam is 150 J/cmor higher and 300 J/cmor lower.3. The extreme ultraviolet light generation system according to claim 1 , wherein the target is supplied in the form of a droplet.4. The extreme ultraviolet light generation system according to claim 3 , wherein a diameter of the droplet is equal to or greater than 12 μm and equal to or smaller than 40 μm.5. The extreme ultraviolet light generation system ...

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 ...

DRIVING CURRENT CORRECTION METHOD AND APPARATUS FOR MULTIPLE LASER DEVICES, AND LASER PROJECTOR

The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector. A specific embodiment of the method includes in a projection period of a nth pixel point: sequentially driving a plurality of laser devices of a laser source to emit laser, and respectively detecting light intensity information of lasers emitted from the plurality of laser devices by using a light sensor; acquiring an actual light intensity of the lasers emitted from the plurality of laser devices according to an electric signal output by the light sensor, and establishing a corresponding relation between a driving current and an actual light intensity of each laser device according to the driving current of the each laser device and the actual light intensity of the laser emitted from the each laser device when the n-th pixel point is projected; from a projection of a (n+1)-th pixel point: correcting the driving current of the each laser device according to a set light intensity of the each laser device and the corresponding relation between the driving current and the actual light intensity of the each laser device. The implementation has a high consistency of detecting light intensity information that can be simply performed. 1. A driving current correction method for multiple laser devices , comprising:in a projection period of a n-th pixel point:sequentially driving a plurality of laser devices of a laser source to emit laser, and respectively detecting light intensity information of lasers emitted from the plurality of laser devices by using a light sensor;acquiring an actual light intensity of the lasers emitted from the plurality of laser devices according to an electric signal output by the light sensor, and establishing a corresponding relation between a driving current and an actual light intensity of each laser device according to the driving current of the each laser device and the actual light intensity of the laser ...

INJECTION-LOCKED LASER SYSTEM

A method and system for injection-locking multiple optical amplifiers is disclosed. A master laser is employed to generate a continuous-wave output field. Optical modulators then produce first and second seed optical fields from the continuous-wave output field. The first and second seed optical fields provide an input to injection lock one or more optical amplifiers, optionally at different operating frequencies. Since the first and second seed optical fields are generated from the continuous-wave output field then the output fields of the optical amplifiers exhibit a high phase-coherence with each other and with the continuous-wave output field. Employing the first and second optical fields reduces the requirement to induce large frequency shifts on a single optical field. Techniques for phase-locking the output of the injection-locked laser systems are also provided to further reduce phase noise within the systems. 1125. An injection-locked laser system ( , ) comprising:{'b': 2', '4, 'sub': '0', 'a master laser () that generates a continuous-wave output field () having a frequency (f);'}{'b': 5', '5', '5', '4', '6', '7, 'i': a', 'd, 'sub': 1', '2, 'one or more optical modulators (, , ) employed to produce from the continuous-wave output field () a first seed optical field () having a first frequency (f) and a second seed optical field () having a second frequency (f);'}{'b': 6', '8', '8', '12', '1', '25, 'i': a', 'c', 'a', 'c', 'a', 'c, 'sub': 1', '1, 'wherein the first seed optical field () provides an input to injection lock one or more optical amplifiers (-) at the first frequency (f), the one or more optical amplifiers (-) producing one or more continuous-wave output fields (-) for the injection-locked laser system (, ) at the first frequency (f)'}{'b': 7', '8', '8', '12', '1', '25, 'i': d', 'f', 'd', 'f', 'd', 'f, 'sub': 2', '2, 'and the second seed optical field () provides an input to injection lock one or more optical amplifiers (-) at the second ...

Laser system and extreme ultraviolet light generation system

The laser system may include: a clock generator; a mode-locked laser device having an optical resonator; a controlling device capable of controlling resonator length of the optical resonator; a detector disposed in an optical path of the pulse laser beam, configured to detect the pulse laser beam and output a detection signal; a switching device disposed in the optical path of the pulse laser beam, capable of switching the pulse laser beam; and a controller, capable of controlling the controlling device based on the clock signal outputted by the clock generator and on the detection signal outputted by the detector, and capable of controlling the switching device based on the clock signal outputted by the clock generator and on a timing signal outputted by an external device.

Heuristic laser device using an apparatus for producing laser pulses, and corresponding heuristic method

A laser device includes an apparatus for producing amplified laser pulses, using a plurality of amplifying optical fibers, and groups the basic amplified pulses into an overall amplified pulse, as well as a target, onto which the overall amplified pulse is directed such as to generate a predetermined physical process thereon, which causes a change of state in the target. The laser device is configured to measure at least one distinctive parameter of the generated physical process; adjust at least one characteristic for adjusting the basic amplified laser pulses; and analyze a plurality of measurements for different adjustments. The device analyzes the measurements many times in loops for different laser pulse adjustment characteristics, enabling an optimization by a heuristic method. Also provided is a heuristic optimization method implemented by the laser device.

SLAB LASER AND AMPLIFIER

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

Laser System For Skin Treatment

A method of treating pigmented lesions and vascular lesions by a wavelength between 500 nm and 600 nm applied to the segment of skin as a train of pulses. In some examples, a wavelength of 1048 nm is applied sequentially or simultaneously with the wavelength between 500 nm and 600 nm. Disclosed is also an apparatus supporting such skin treatment. 1. An apparatus to generate a train of sub-pulses comprising:a flash-lamp pumped free-running alexandrite laser configured to generate a sequence of laser light macro pulses with each macro pulse having a duration of 0.1 to 100 msec;an Neodymium doped laser medium (Nd:YLF) pumped by the free running alexandrite laser;a passive Q-switch configured to generate a train of laser light sub-pulses within an envelope of 0.1 ms to 100 ms;a beam shaping optical system;a second harmonic generator and a lens to focus laser light generated by the neodymium doped laser medium into a fiber for delivery to a segment of skin; andwherein the alexandrite laser is configured to generate the sequence of laser macro pulses with each laser macro pulse having a duration of 0.1 to 100 ms.2. The apparatus according to claim 1 , wherein the neodymium-doped laser medium is a Nd:YLF rod.3. The apparatus according to claim 1 , wherein the passive Q-switch is a Cr. 4+:YAG crystal.4. The apparatus according to claim 1 , wherein the second harmonic generator is a Lithium Triborate (LiBOor LBO) nonlinear optical crystal.5. The apparatus according to claim 1 , wherein the second harmonic generator is a non-critically phase matched Lithium Triborate (LiBOor LBO) nonlinear optical crystal and wherein a non-critically phase matched second harmonic generator supports low sensitivity to angular misalignment.6. The apparatus according claim 1 , wherein the second harmonic generator is a potassium titanyl phosphate (KTP) nonlinear optical crystal.7. The apparatus according to claim 1 , wherein the second harmonic generator produces a laser light with wavelength of ...

DEFORMOMETER FOR DETERMINING DEFORMATION OF AN OPTICAL CAVITY OPTIC

A deformometer includes: a cavity body; entry and exit optical cavity optics, such that the optical cavity produces filtered combined light from combined light; a first laser that provides first light; a second laser that provides second light; an optical combiner that: receives the first light; receives the second light; combines the first light and the second light; produces combined light from the first light and the second light; and communicates the combined light to the entry optical cavity optic; a beam splitter that: receives the filtered combined light; splits the filtered combined light; a first light detector in optical communication with the beam splitter and that: receives the first filtered light from the beam splitter; and produces a first cavity signal from the first filtered light; and a second light detector that: receives the second filtered light; and produces a second cavity signal from the second filtered light. 1. A deformometer for determining deformation of an optical cavity optic disposed on an optical cavity , the deformometer comprising: a cavity body;', 'an entry optical cavity optic disposed at an entry end of cavity body and that receives combined light; and', 'an exit optical cavity optic disposed at an exit end of cavity body, the entry optical cavity optic in optical communication and optically opposing the exit optical cavity optic, such that the exit optical cavity optic receives the combined light from the entry optical cavity optic,', 'such that the optical cavity produces filtered combined light from the combined light;, 'the optical cavity comprisinga first laser in optical communication with entry optical cavity optic and that provides first light;a second laser in optical communication with entry optical cavity optic and that provides second light; receives the first light from the first laser;', 'receives the second light from the second laser;', 'combines the first light and the second light;', 'produces combined light ...

DEFORMOMETER FOR DETERMINING DEFORMATION OF AN OPTICAL CAVITY OPTIC

A deformometer includes: a cavity body; entry and exit optical cavity optics, such that the optical cavity produces filtered combined light from combined light; a first laser that provides first light; a second laser that provides second light; an optical combiner that: receives the first light; receives the second light; combines the first light and the second light; produces combined light from the first light and the second light; and communicates the combined light to the entry optical cavity optic; a beam splitter that: receives the filtered combined light; splits the filtered combined light; a first light detector in optical communication with the beam splitter and that: receives the first filtered light from the beam splitter; and produces a first cavity signal from the first filtered light; and a second light detector that: receives the second filtered light; and produces a second cavity signal from the second filtered light. 1. A deformometer for determining deformation of an optical cavity optic disposed on an optical cavity , the deformometer comprising: a cavity body;', 'an entry optical cavity optic disposed at an entry end of cavity body and that receives combined light; and', 'an exit optical cavity optic disposed at an exit end of cavity body, the entry optical cavity optic in optical communication and optically opposing the exit optical cavity optic, such that the exit optical cavity optic receives the combined light from the entry optical cavity optic,', 'such that the optical cavity produces filtered combined light from the combined light;, 'the optical cavity comprisinga first laser in optical communication with entry optical cavity optic and that provides first light;a second laser in optical communication with entry optical cavity optic and that provides second light; receives the first light from the first laser;', 'receives the second light from the second laser;', 'combines the first light and the second light;', 'produces combined light ...

DEFORMOMETER FOR DETERMINING DEFORMATION OF AN OPTICAL CAVITY OPTIC

A deformometer includes: a cavity body; entry and exit optical cavity optics, such that the optical cavity produces filtered combined light from combined light; a first laser that provides first light; a second laser that provides second light; an optical combiner that: receives the first light; receives the second light; combines the first light and the second light; produces combined light from the first light and the second light; and communicates the combined light to the entry optical cavity optic; a beam splitter that: receives the filtered combined light; splits the filtered combined light; a first light detector in optical communication with the beam splitter and that: receives the first filtered light from the beam splitter; and produces a first cavity signal from the first filtered light; and a second light detector that: receives the second filtered light; and produces a second cavity signal from the second filtered light. 1. A deformometer for determining deformation of an optical cavity optic disposed on an optical cavity , the deformometer comprising: a cavity body;', 'a first entry optical cavity optic disposed at an entry end of the cavity body; and', 'a first exit optical cavity optic disposed at an exit end of cavity body, the first entry optical cavity optic in optical communication and optically opposing the first exit optical cavity optic,', [{'b': '1', 'receives a reference gas at a first pressure P;'}, 'receives a first light; and', 'produces a first filtered light from the first light;, 'such that the first optical cavity], 'a first optical cavity comprising a second entry optical cavity optic disposed at the entry end of the cavity body; and', 'a second exit optical cavity optic disposed at the exit end of the cavity body, the second entry optical cavity optic in optical communication and optically opposing the second exit optical cavity optic,', [{'b': '2', 'receives a second gas at a second pressure P;'}, 'receives a second light; and', ' ...