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    Chirped pulse amplification laser system
    2.
    发明授权
    Chirped pulse amplification laser system 有权

    公开(公告)号：US11444425B2

    公开(公告)日：2022-09-13

    申请号：US16496828

    申请日：2018-03-29

    申请人： IPG PHOTONICS CORPORATION

    发明人： Alex Yusim ,  Bruce Jenket ,  Anton Drozhzhin ,  George Venus ,  Igor Samartsev ,  Dmitry Pestov ,  Anton Ryabtsev

    IPC分类号： H01S3/00 ,  H01S3/08 ,  H01S3/10 ,  H01S3/13 ,  H01S3/23

    摘要： The ultra-short pulse chirped pulse amplification (CPA) laser system and method of operating CPA laser system include outputting nearly transform limited (TL) pulses by a mode locked laser. The system and method further include temporarily stretching the TL pulses by a first Bragg grating providing thus each stretched pulse with a chirp which is further compensated for in a second Bragg grating operating as as a compressor. The laser system and method further include a pulse shaping unit measuring a spectral phase across the recompressed pulse and further adjusting the deviation of the measured spectral phase from that of the TL pulse by generating a corrective signal. The corrective signal is applied to the array of actuators coupled to respective segments of one of the BGs which are selectively actuated to induce the desired phase change, with the one BG thus operating as both stretcher/compressor and pulse shaper.

    PULSE CONFIGURABLE FIBER LASER UNIT
    4.
    发明申请
    PULSE CONFIGURABLE FIBER LASER UNIT 审中-公开

    公开(公告)号：US20200076151A1

    公开(公告)日：2020-03-05

    申请号：US16561968

    申请日：2019-09-05

    申请人： IPG PHOTONICS CORPORATION

    发明人： Andrey BORDENYUK ,  Dmitry Pestov ,  Vadim Lozovoy ,  Igor Samartsev

    IPC分类号： H01S3/067 ,  H01S3/00 ,  H01S3/11 ,  H01S3/08

    摘要： A pulse configurable laser unit is an environmentally stable, mechanically robust, and maintenance-free ultrafast laser source for low-energy industrial, medical and analytical applications. The key features of the laser unit are a reliable, self-starting fiber oscillator and an integrated programmable pulse shaper. The combination of these components allows taking full advantage of the laser's broad bandwidth ultrashort pulse duration and arbitrary waveform generation via spectral phase manipulation. The source can routinely deliver near-TL, sub-60 fs pulses with megawatt-level peak power. The output pulse dispersion can be tuned to pre-compensate phase distortions down the line as well as to optimize the pulse profile for a specific application.

    Ultra high power single mode fiber laser system
    5.
    发明授权
    Ultra high power single mode fiber laser system 有权
    超高功率单模光纤激光系统

    公开(公告)号：US09306364B2

    公开(公告)日：2016-04-05

    申请号：US14464337

    申请日：2014-08-20

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Igor Samartsev

    IPC分类号： H01S3/00 ,  H01S3/094 ,  H01S3/067 ,  H01S3/16

    CPC分类号： H01S3/094042 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/094069 ,  H01S3/1618

    摘要： An ultra-high power fiber laser system includes a single-piece fiber booster configured with fiber and straight short rod fiber portions which have in common a core configured with a numerical aperture≧0.1. The rod fiber portion has a length≦a few tens of centimeters and has a frustoconical cross-section expanding from the uniformly configured fiber portion. The core extending along the fiber portion supports a single mode (SM) or very low number of HOMs, whereas the large-diameter end of the frustoconical core portion supports a fundamental mode and high order multiple modes. The disclosed booster is energized by a pump source configured to emit pump light with such a density that while amplification of the fundamental mode continues in the central area of the core, a peripheral non-overlapped area of the core is bleached. The disclosed booster emits signal light in substantially a fundamental mode.

    摘要翻译： 一种超高功率光纤激光器系统，其特征在于，具有由纤维和直短杆纤维部分构成的单片式光纤增强器，共同构成数值孔径≥0.1的芯。 棒状纤维部分具有长度为几十厘米的长度，并且具有从均匀构造的纤维部分扩展的截头圆锥形横截面。 沿着纤维部分延伸的芯部支持单模（SM）或非常低数量的HOM，而截头圆锥形芯部分的大直径端支撑基模和高阶多模。 所公开的增压器由配置成以这样的密度发射泵浦光的泵浦电源来激励，即当基本模式的放大在芯的中心区域继续时，芯的外围非重叠区域被漂白。 所公开的增强器以基本上基本模式发射信号光。

    High power single mode fiber pump laser systems at 980 nm
    8.
    发明授权
    High power single mode fiber pump laser systems at 980 nm 有权
    大功率单模光纤泵浦激光系统在980 nm

    公开(公告)号：US09088131B1

    公开(公告)日：2015-07-21

    申请号：US14308241

    申请日：2014-06-18

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Igor Samartsev

    IPC分类号： H01S3/16 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941

    CPC分类号： H01S3/094003 ,  H01S3/06733 ,  H01S3/06745 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094019 ,  H01S3/094042 ,  H01S3/094053 ,  H01S3/094069 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/1608 ,  H01S3/1611 ,  H01S3/1618 ,  H01S3/2375 ,  H01S2301/02

    摘要： A high power pump ultra bright low-noise source is configured with a multimode (“MM”) seed source outputting a MM smooth, low-noise signal light at a wavelength λp in a wavelength range between about 900 and 940 nm, a MM Yb fiber wavelength converter operative to convert emission of a plurality of high power (“HP”) semiconductor laser diodes at a wavelength λsp to a pump output at the desired wavelength λp. The Yb-doped MM wavelength converter is configured with noise levels substantially identical to and lower than those of the low-noise signal light, brightness (“B”) substantially equal to n×B, wherein n is a number HP semiconductor laser diodes, and B is brightness of each HP laser diode, and output power (“Po”) substantially equal to nPd, wherein Pd is a power of each HP laser diode, and n is the number thereof.

    摘要翻译： 高功率泵超亮低噪声源配置有多模（“MM”）种子源，其输出波长λp在约900和940nm之间的MM平滑，低噪声信号光，MM Yb 光纤波长转换器，用于将波长λsp处的多个高功率（“HP”）半导体激光二极管的发射转换成所需波长λp的泵浦输出。 Yb掺杂MM波长转换器配置有与低噪声信号光基本相同且低于基本上等于n×B的亮度（“B”）的噪声电平，其中n是数字HP半导体激光二极管， 和B是每个HP激光二极管的亮度，并且输出功率（“Po”）基本上等于nPd，其中Pd是每个HP激光二极管的功率，n是其数量。

    ULTRA HIGH POWER SINGLE MODE FIBER LASER SYSTEM
    9.
    发明申请
    ULTRA HIGH POWER SINGLE MODE FIBER LASER SYSTEM 审中-公开
    超高功率单模光纤激光系统

    公开(公告)号：US20150055210A1

    公开(公告)日：2015-02-26

    申请号：US14464337

    申请日：2014-08-20

    申请人： IPG PHOTONICS CORPORATION

    发明人： Valentin Gapontsev ,  Igor Samartsev

    IPC分类号： H01S3/094

    CPC分类号： H01S3/094042 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/094069 ,  H01S3/1618

    摘要： An ultra-high power fiber laser system includes a single-piece fiber booster configured with fiber and straight short rod fiber portions which have in common a core configured with a numerical aperture equal to or higher than 0.1 and doped with ions of one or more rare earth elements across the entire cross-section thereof. The rod fiber portion is structured with a short length not exceeding about a few tens of centimeters and has a generally frustoconical cross-section expanding from the uniformly configured fiber portion. The core extending along the fiber portion is capable of supporting either a SM or a very low number of HOMs guided along the core in a propagating direction and coupled into the small diameter end of the rod fiber's frustoconically-shaped core. The opposite, large-diameter end of the frustoconical core supports multiple modes with a fundamental mode overlapping at least about 0.652 of the cross-section area of the core along the entire length thereof. The disclosed power system further includes a pump source emitting high power multi-mode pump light which is coupled into the large-diameter end of the core in a counter propagating direction with aNA of at most equal to the NA of the core. The pump is configured to emit pump light with such a density that while amplification of the fundamental mode continues in the overlapped area of the core, a peripheral non-overlapped area of the core is bleached. As a consequence, the disclosed system emits signal light in substantially a fundamental mode with an average power of several kWs in a CW regime or peak power of about one or more GWs in a pulsed regime of the system's operation.

    摘要翻译： 一种超高功率光纤激光器系统，其特征在于包括：纤维和直短纤维部分构成的单件式光纤增强器，其共同构成为具有等于或高于0.1的数值孔径的核心，并掺杂有一个或多个稀有的离子 地球元素横跨其整个横截面。 杆状纤维部分构造成具有不超过约几十厘米的短长度，并且具有从均匀构造的纤维部分扩展的大致截头圆锥形横截面。 沿着纤维部分延伸的芯能够支撑在传播方向上沿着芯引导的SM或非常少数量的HOM，并耦合到杆状光纤的截头圆锥形芯的小直径端。 截头圆锥体的相对的大直径端部支撑多个模式，其基本模式沿核心的整个长度重叠至少约0.652的横截面面积。 所公开的电力系统还包括发射高功率多模式泵浦光的泵浦源，其以反向传播方向耦合到核心的大直径端，其中NA最大等于核的NA。 泵被配置为以这样的密度发射泵浦光，即当在芯的重叠区域继续基本模式的放大时，芯的外围非重叠区域被漂白。 因此，所公开的系统在CW系统中以几个千瓦的平均功率或在系统操作的脉冲状态中的大约一个或多个GW的峰值功率基本上以基本模式发射信号光。

    Ultra-High Power Single Mode Fiber Laser System with Non-Uniformly Configure Fiber-to-Fiber Rod Multimode Amplifier
    10.
    发明申请
    Ultra-High Power Single Mode Fiber Laser System with Non-Uniformly Configure Fiber-to-Fiber Rod Multimode Amplifier 有权
    超高功率单模光纤激光系统，非均匀配置光纤到纤维杆多模放大器

    公开(公告)号：US20140314106A1

    公开(公告)日：2014-10-23

    申请号：US14199397

    申请日：2014-03-06

    申请人： IPG Photonics Corporation

    发明人： Valentin Fomin ,  Anton Ferin ,  Mikhail Abramov ,  Igor Samartsev ,  Valentin Gapontsev

    IPC分类号： H01S3/067

    CPC分类号： H01S3/06708 ,  H01S3/005 ,  H01S3/0407 ,  H01S3/067 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/094019 ,  H01S3/094053 ,  H01S3/094069 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/10

    摘要： A high power fiber laser system includes a booster winch is configured as a fiber amplifier extending over free space, pump source and laser head including a reflective element which receives pump light and reflects toward the output end of the booster in a counter signal-propagating direction. The booster is configured with concentric and coextending frustoconically shaped (“MM”) core and cladding around the core. The core includes a mode transition region expanding between small diameter SM input and large diameter MM output core ends and configured so that amplification of high order modes is substantially suppressed as a single mode (“SM”) signal light propagates from the input to output core ends. The laser head receives output ends of respective pump light delivery fibers and signal fiber, respectively. The pump source is structured with a plurality of independent sub pumps arranged around the booster. The laser head supports a segmented mirror configured to reflect pump lights from respective pump sub-sources to the output end of the booster in a counter propagating direction, wherein the booster is configured to emit the amplified signal light reaching up to MW power levels substantially in the SM.

    摘要翻译： 高功率光纤激光器系统包括：升压绞盘被配置为在自由空间上延伸的光纤放大器，泵浦源和激光头包括反射元件，该反射元件接收泵浦光并以反向信号传播方向朝向增强器的输出端反射 。 升压器配置有同心和共同延伸的截头圆锥形（“MM”）芯和围绕芯的包层。 核心包括在小直径SM输入和大直径MM输出核心端之间扩展的模式转变区域，并且被配置为当单模（“SM”）信号光从输入到输出核心传播时基本上抑制高阶模式的放大 结束。 激光头分别接收各个泵送光纤和信号光纤的输出端。 泵源结构具有围绕增压器布置的多个独立副泵。 激光头支撑分段反射镜，其配置成将来自相应泵子源的泵浦光以反向传播方向反射到升压器的输出端，其中，升压器被配置为发射达到MW功率水平的放大信号光， SM。