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    HIGH POWER SINGLE MODE YTTERBIUM FIBER LASER SYSTEM WITH SINGLE MODE NEODYMIUM FIBER SOURCE
    62.
    发明公开
    HIGH POWER SINGLE MODE YTTERBIUM FIBER LASER SYSTEM WITH SINGLE MODE NEODYMIUM FIBER SOURCE 有权
    具有单FASHIONS钕的纤维来源高性能单FASHIONS镱光纤激光器系统

    公开(公告)号：EP2724429A1

    公开(公告)日：2014-04-30

    申请号：EP13738024.2

    申请日：2013-01-18

    申请人： IPG Photonics Corporation ,  Gapontsev, Valentin ,  Samartsev, Igor

    发明人： GAPONTSEV, Valentin ,  SAMARTSEV, Igor

    IPC分类号： H01S3/067

    CPC分类号： H01S3/06708 ,  G02B6/14 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/08045 ,  H01S3/094042 ,  H01S3/1611 ,  H01S3/1618 ,  H01S2301/03

    摘要： A high power fiber laser system emitting a substantially diffraction limited beam with a Gaussian intensity profile includes a single mode ("SM") neodymium fiber pump source outputting a SM pump light; a seed laser operative to emit a SM signal light at a wavelength greater than that of the pump light; a SM DWM receiving and multiplexing the SM pump and signal lights. The disclosed system further includes a booster fiber amplifier which is confiugred with a frustoconically-shaped ytterbium ("Yb") doped core receiving the pump and signal lights and configured with a small diameter input end which supports only a SM and a large diameter output end which is capable of supporting the SM and high order modes (:HOM"). The booster further has a cladding surrounding and coextending with the core, the core being configured for having intensity profiles of respective SMs of pump and signal lights overlap one another so that an overlap integral substantially equals to one (1) along an entire length of the core. The SM of the light signal extracts substantially the entire energy from the pump mode leaving the HOMs without amplification necessary to affect a quality of the diffraction limited beam of the system in a MW peak power range and hundreds of watt average power range.

    Q-SWITCHED OSCILLATOR SEED-SOURCE FOR MOPA LASER ILLUMINATOR METHOD AND APPARATUS
    66.
    发明公开
    Q-SWITCHED OSCILLATOR SEED-SOURCE FOR MOPA LASER ILLUMINATOR METHOD AND APPARATUS 审中-公开
    GÜTEGESCHALTETEROSZILLATOR ALS SEED-QUELLEFÜRMOPA-LASERBELEUCHTER，VERFAHREN UND VORRICHTUNG

    公开(公告)号：EP2504893A2

    公开(公告)日：2012-10-03

    申请号：EP10834960.6

    申请日：2010-11-23

    申请人： Lockheed Martin Corporation

    发明人： SAVAGE-LEUCHS, Matthias ,  DILLEY, Christian ,  LEMAIRE, Charles

    IPC分类号： H01S3/083 ,  H01S3/11

    CPC分类号： H01S3/06758 ,  B60Q1/0076 ,  H01S3/06704 ,  H01S3/06712 ,  H01S3/06716 ,  H01S3/0675 ,  H01S3/06791 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094053 ,  H01S3/0941 ,  H01S3/1022 ,  H01S3/113 ,  H01S3/115 ,  H01S3/127 ,  H01S3/2316 ,  H01S5/146 ,  H01S2301/03

    摘要： An apparatus, method and system that uses a Q-switched laser or a Q-seed source for a seed pulse signal having a controlled high-dynamic-range amplitude that avoids and/or compensates for pulse steepening in high-gain optical-fiber and/or optical-rod amplification of optical pulses. Optionally, the optical output is used for LIDAR or illumination purposes (e.g., for image acquisition). In some embodiments, well-controlled pulse shapes are obtained having a wide dynamic range, long duration, and not-too-narrow linewidth. In some embodiments, upon the opening of a Q-switch in an optical cavity having a gain medium, the amplification builds relatively slowly, wherein each round trip through the gain medium increases the amplitude of the optical pulse. Other embodiments use quasi-Q-switch devices or a plurality of amplitude modulators to obtain Q-seed pulses. These configurations provide optical pulses having wide dynamic ranges that ameliorate problems of pulse steepening, non-linear spectral broadening and the like in very-high-power MOPA devices.

    摘要翻译： 一种使用Q开关激光器或Q种子源用于具有受控的高动态范围幅度的种子脉冲信号的装置，方法和系统，其避免和/或补偿高增益光纤中的脉冲陡峭，以及 /或光学脉冲的光棒放大。 可选地，光输出用于LIDAR或照明目的（例如，用于图像采集）。 在一些实施例中，获得具有宽动态范围，长持续时间和不太窄线宽的良好控制的脉冲形状。 在一些实施例中，当在具有增益介质的光腔中打开Q开关时，放大相对缓慢地建立，其中通过增益介质的每次往返都增加了光脉冲的幅度。 其他实施例使用准Q开关器件或多个幅度调制器来获得Q-种子脉冲。 这些配置提供具有宽动态范围的光脉冲，其可改善非常高功率的MOPA器件中的脉冲陡峭度，非线性频谱展宽等问题。