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    DEVICE AND METHOD FOR GENERATING HIGH OUTPUT OPTICAL PULSE
    11.
    发明专利
    DEVICE AND METHOD FOR GENERATING HIGH OUTPUT OPTICAL PULSE 失效

    公开(公告)号：JPH10213827A

    公开(公告)日：1998-08-11

    申请号：JP1159598

    申请日：1998-01-23

    Applicant: IMRA AMERICA INC

    Inventor： FERMANN MARTIN E ,  GALVANAUSKAS ALMANTAS DR ,  HARTER DONALD J DR

    IPC: G02F1/35 ,  G02F1/37 ,  H01S3/067 ,  H01S3/07 ,  H01S3/109 ,  H01S3/16 ,  H01S3/23 ,  H01S3/30

    Abstract: PROBLEM TO BE SOLVED: To provide a means for generating a high output optical pulse of femto-seconds. SOLUTION: The high output optical pulse generator has a fiber oscillator 10 for generating signal light, an amplification fiber 11 to be used also as a Soliton-Raman compressor(SRC) capable of receiving signal light with a non- linear phase delay and amplifying and compressing the received signal and a periodical poling LNbO (PPLN) 20 to be a frequency converter for frequency- converting the amplified optical pulse into a high output optical pulse. Dispersion is compensated by a dispersion compensating fiber 18. An optical pulse is reflected by a Faraday rotation mirror(FRM) 19 and a double pulse format is taken. Energy from pump light injected from a pump 16 is obtained, a signal light is amplified and compressed and a high output optical pulse of femto- seconds can be obtained by wavelength frequency-converted by the PPLN frequency converter 20.

    Ultrashort laser micro-texture printing
    12.
    发明专利
    Ultrashort laser micro-texture printing 审中-公开
    ULTRASHORT激光微纹理印刷

    公开(公告)号：JP2014133263A

    公开(公告)日：2014-07-24

    申请号：JP2014043164

    申请日：2014-03-05

    Applicant: Imra America Inc ,  イムラ アメリカ インコーポレイテッド

    Inventor： LAWRENCE SHAH ,  FERMANN MARTIN E

    IPC: B23K26/00

    CPC classification number: G06K15/1209 ,  B41J2/442 ,  B41J2/471 ,  G06K15/129 ,  H04N1/40037 ,  H04N1/407

    Abstract: PROBLEM TO BE SOLVED: To use lasers for patterning images on solid substrates, by solving the problem with conventional laser engraving, which yields grayscale images with image contrast determined by machining depth and is sensitive to laser irradiation parameters.SOLUTION: Systems and methods for providing laser texturing of solid substrates are disclosed. In some embodiments, images may be obtainable from the substrate by modifying the reflective, diffractive, and/or absorptive features of the substrate or the substrate surface by forming random, periodic, and/or semi-periodic micro-structure features on the substrate (or substrate surface) by an ultrafast laser pulse train. The micro-structure features may have average sizes slightly larger, comparable to, and/or smaller than the wavelength of light of the ultrafast pulse train. The ultrafast pulse train may be modulated in order to vary, for example, optical exposure time, pulse train intensity, laser polarization, laser wavelength, or a combination thereof.

    Abstract translation: 要解决的问题：通过解决常规激光雕刻的问题，使用激光器对固体基板上的图像进行图像处理，这产生了通过加工深度确定的图像对比度的灰度图像，并且对激光照射参数敏感。解决方案：提供 公开了固体基板的激光纹理化。 在一些实施例中，可以通过在衬底上形成随机，周期性和/或半周期微结构特征来修饰衬底或衬底表面的反射，衍射和/或吸收特征，从衬底获得图像（ 或基板表面）。 微结构特征可以具有比超快脉冲序列的光的波长稍微大一点，和/或小于其的波长的平均尺寸。 为了改变例如光学曝光时间，脉冲串强度，激光偏振，激光波长或其组合，可以调制超快脉冲串。

    High output chirp pulse amplifier and compressor
    13.
    发明专利
    High output chirp pulse amplifier and compressor 审中-公开
    高输出脉冲放大器和压缩器

    公开(公告)号：JP2013153196A

    公开(公告)日：2013-08-08

    申请号：JP2013071382

    申请日：2013-03-29

    Applicant: Imra America Inc ,  イムラ アメリカ インコーポレイテッド

    Inventor： HARTER DONALD J ,  GALVANAUSKAS ALMANTAS ,  FERMANN MARTIN E

    IPC: G02F1/35 ,  H01S3/10 ,  H01S3/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/23

    CPC classification number: H01S3/06708 ,  H01S3/0057 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/094003 ,  Y10S372/703

    Abstract: PROBLEM TO BE SOLVED: To provide a compact and inexpensive high output chirp pulse amplifier from 100 mW to 10 W, and a compressor suitable for the high output chirp pulse amplifier.SOLUTION: The high output chirp pulse amplifier generating an ultrashort pulse includes a source 10 for generating an elongation pulse, i.e., elongated pulse light, an output amplification stage 20 for amplifying the elongation pulse, and a compressor 40 for receiving the elongation pulse from the output amplification stage 20 and compressing the elongation pulse. The output amplification stage 20 has a double clad fiber and a pump. Preferably, the compressor 40 includes a fiber grid for compressing a laser pulse signal to have a duration less than a threshold of nonlinear effect, and a grating which accepts the pulse signal compressed by the fiber grid so as to compress the pulse signal furthermore. Chirp pulse amplification action of a clad pump fiber ensures high output chirp pulse amplification with a compact and inexpensive amplifier.

    Abstract translation: 要解决的问题：提供从100mW到10W的紧凑且便宜的高输出啁啾脉冲放大器，以及适用于高输出啁啾脉冲放大器的压缩器。解决方案：产生超短脉冲的高输出啁啾脉冲放大器包括源 10，用于产生延长脉冲，即细长脉冲光，用于放大伸长脉冲的输出放大级20，以及用于从输出放大级20接收延长脉冲并压缩伸长脉冲的压缩器40。 输出放大级20具有双包层光纤和泵。 优选地，压缩机40包括用于压缩激光脉冲信号以具有小于非线性效应阈值的持续时间的光纤网格，以及接受由光纤网格压缩的脉冲信号以进一步压缩脉冲信号的光栅。 包络泵浦光纤的啁啾脉冲放大作用通过紧凑且便宜的放大器确保高输出啁啾脉冲放大。

    Polarization maintaining fiber, polarization maintaining fiber laser, passive mode-locking fiber laser, fiber amplifier and optical fiber
    15.
    发明专利
    Polarization maintaining fiber, polarization maintaining fiber laser, passive mode-locking fiber laser, fiber amplifier and optical fiber 审中-公开
    极化维护光纤，极化维护光纤激光器，被动模式锁定光纤激光器，光纤放大器和光纤

    公开(公告)号：JP2008158547A

    公开(公告)日：2008-07-10

    申请号：JP2008040435

    申请日：2008-02-21

    Applicant: Imra America Inc ,  イムラ アメリカ インコーポレイテッド

    Inventor： FERMANN MARTIN E ,  HARTER DONALD J DR

    IPC: G02B6/02 ,  G02B6/024 ,  G02B6/036 ,  G02B6/44 ,  H01S3/06 ,  H01S3/067 ,  H01S3/098 ,  H01S3/10

    CPC classification number: H01S3/06708 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/094019 ,  H01S3/1118

    Abstract: PROBLEM TO BE SOLVED: To provide a fiber in which amount of polarization mode coupling and polarization mode dispersion are reduced and in which polarization maintaining capacity is increased, and to provide a high efficient fiber amplifier or laser with a polarization maintaining large outer-diameter such that pump light is guided inside a cladding while a large outer cladding ensures decrease in mode-coupling inside the fiber core. SOLUTION: The polarization maintaining fiber includes a fiber core, a first cladding surrounding this core, a coating surrounding this first cladding, and a means for minimizing polarization mode-coupling that couples with a fiber having a minimum fiber outer diameter ≥125 μm. COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种其中极化模式耦合和偏振模色散量减少并且其中增加极化维持能力的光纤，并且提供具有极化保持大外部的高效光纤放大器或激光器 直径，使得泵浦光在包层内被引导，而大的外包层确保纤维芯内的模式耦合的减小。 解决方案：偏振保持光纤包括纤维芯，围绕该芯的第一包层，围绕该第一包层的涂层以及用于最小化与具有最小纤维外径≥125的纤维耦合的偏振模耦合的装置 微米。 版权所有（C）2008，JPO＆INPIT

    MODULAR, HIGH ENERGY, WIDELY-TUNABLE AND ULTRAFAST FIBER SOURCE
    18.
    发明专利
    MODULAR, HIGH ENERGY, WIDELY-TUNABLE AND ULTRAFAST FIBER SOURCE 失效

    公开(公告)号：JP2002118315A

    公开(公告)日：2002-04-19

    申请号：JP2001154396

    申请日：2001-05-23

    Applicant: IMRA AMERICA INC

    Inventor： FERMANN MARTIN E ,  GALVANAUSKAS ALMANTAS ,  HARTER DONALD J

    IPC: G02B6/02 ,  G02F1/35 ,  G02F1/37 ,  H01S3/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/109 ,  H01S3/16 ,  H01S3/23 ,  H01S3/30 ,  G02B6/10

    Abstract: PROBLEM TO BE SOLVED: To provide a modular, compact and widely-tunable laser system for efficiently generating a high peak ultrashort pulses. SOLUTION: System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Peak power handling capability of the fiber amplifiers is expanded by using optimizing pulse shapes as well as dispersively broadened pulses. Dispersive broadening is introduced by dispersive pulse stretching in the presence of self-phase modulation and gain, resulting in the formation of high-power parabolic pulses. After amplification, the dispersively stretched pulses can be recompressed to nearly band width limit by the implementation of another set of dispersive delay lines. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented. Further, a positively dispersing optical amplifier and a Raman amplifier fiber are utilized.

    Optical amplification system
    19.
    发明专利
    Optical amplification system 有权
    光放大系统

    公开(公告)号：JP2013055362A

    公开(公告)日：2013-03-21

    申请号：JP2012274588

    申请日：2012-12-17

    Applicant: Imra America Inc ,  イムラ アメリカ インコーポレイテッド

    Inventor： FERMANN MARTIN E ,  HARTER DONALD J DR

    IPC: H01S3/067 ,  H01S3/10 ,  G02F1/37 ,  H01S3/06 ,  H01S3/08 ,  H01S3/094 ,  H01S3/23 ,  H04B10/02 ,  H04B10/18

    CPC classification number: H01S3/067 ,  G02F1/37 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/08022 ,  H01S3/094003 ,  H01S3/235

    Abstract: PROBLEM TO BE SOLVED: To increase the energy storage potential in an optical fiber amplifier and to produce peak power and pulse energy which are higher than those achievable in single-mode (SM) fibers before the onset of undesirable nonlinearity and gain saturation.SOLUTION: An optical amplification system comprises: a fiber oscillator 10 as a laser source generating an input beam having a nearly diffraction limited mode; a multi-mode fiber amplifier 12; a mode converter 14 receiving the input beam and converting the mode of the input beam to match a fundamental mode of the multi-mode fiber amplifier 12, and providing a mode-converted input beam to the multi-mode fiber amplifier 12; and a pump source 20 optically pumping the multi-mode fiber amplifier 12 to generate an intense amplified beam substantially in the fundamental mode.

    Abstract translation: 要解决的问题：为了增加光纤放大器中的能量存储电位，并产生比在单模（SM）光纤中可达到的不期望的非线性和增益饱和之前可实现的峰值功率和脉冲能量高的峰值功率和脉冲能量 。 解决方案：光放大系统包括：光纤振荡器10，作为产生具有接近衍射限制模式的输入光束的激光源; 多模光纤放大器12; 模式转换器14接收输入光束并转换输入光束的模式以匹配多模光纤放大器12的基本模式，并将模式转换的输入光束提供给多模光纤放大器12; 并且泵浦光源20光学地泵浦多模光纤放大器12以产生基本上处于基本模式的强放大光束。 版权所有（C）2013，JPO＆INPIT

    Polarization maintaining fiber, system and fiber laser
    20.
    发明专利
    Polarization maintaining fiber, system and fiber laser 有权
    极化维护光纤，系统和光纤激光器

    公开(公告)号：JP2012253378A

    公开(公告)日：2012-12-20

    申请号：JP2012181613

    申请日：2012-08-20

    Applicant: Imra America Inc ,  イムラ アメリカ インコーポレイテッド

    Inventor： FERMANN MARTIN E ,  HARTER DONALD J DR

    IPC: G02B6/02 ,  H01S3/067 ,  G02B6/024 ,  G02B6/036 ,  G02B6/44 ,  H01S3/06 ,  H01S3/098 ,  H01S3/10

    CPC classification number: H01S3/06708 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/094019 ,  H01S3/1118

    Abstract: PROBLEM TO BE SOLVED: To provide: a fiber minimized in an amount of polarization mode coupling and polarization mode dispersion and increased in a polarization maintaining function; a polarization maintaining fiber in which pump light is guided inside an inner cladding while a large outside cladding ensures a reduction of mode-coupling inside a fiber core; a system; and a fiber laser.SOLUTION: A polarization maintaining fiber includes: a multi-mode fiber core doped with a rare-earth doping material; a first cladding surrounding the multi-mode fiber core; and a stress producing region provided in the first cladding and producing birefringence which allows single-mode light to transmit through the multi-mode fiber core without causing waveform distortions in a range of a specified fiber length, in the multi-mode fiber core.

    Abstract translation: 要解决的问题：提供：极化模式耦合和偏振模色散量最小化的光纤，并且在偏振保持功能中增加; 一种偏振保持光纤，其中泵浦光在内部包层内被引导，而大的外部包层确保了光纤芯内的模式耦合的减少; 一个系统; 和光纤激光器。 解决方案：偏振保持光纤包括：掺杂有稀土掺杂材料的多模光纤芯; 围绕多模光纤芯的第一包层; 以及设置在第一包层中的应力产生区域，并且在多模光纤芯中产生允许单模光透过多模光纤芯而不引起特定光纤长度范围内的波形失真的双折射。 版权所有（C）2013，JPO＆INPIT

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