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    Method and apparatus for suppression of stimulated brillouin scattering using polarization control with a birefringent delay element
    2.
    发明授权
    Method and apparatus for suppression of stimulated brillouin scattering using polarization control with a birefringent delay element 有权
    使用具有双折射延迟元件的偏振控制来抑制受激布里渊散射的方法和装置

    公开(公告)号：US08995049B2

    公开(公告)日：2015-03-31

    申请号：US13227640

    申请日：2011-09-08

    申请人： Joshua E. Rothenberg

    发明人： Joshua E. Rothenberg

    IPC分类号： H01S3/13 ,  H01S3/067 ,  H01S3/08 ,  H01S3/23

    CPC分类号： H01S3/1308 ,  H01S3/06712 ,  H01S3/06754 ,  H01S3/08054 ,  H01S3/1307 ,  H01S3/2383 ,  H01S2301/03

    摘要： 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.

    摘要翻译： 用于抑制受激布里渊散射（SBS）的方法和装置包括产生光束的主振荡器（MO）; 接收和发送光束的双折射元件，其中所述光束以两个正交轴之间的传输延迟传输; 偏振控制器，其接收所述光束并以期望的偏振透射所述光束; 接收光束的光纤放大器，放大光束并透射光束; 接收光束的补偿双折射元件大致去除了光束的两个轴之间的传输延迟，并且传输输出光束; 以及偏振检测器，其检测输出光束的偏振并向偏振控制器提供反馈以确保输出光束的偏振近似等于期望的输出偏振，以便减小SBS。

    Polarization control with mode stability
    4.
    发明授权
    Polarization control with mode stability 有权
    极化控制具有模式稳定性

    公开(公告)号：US08922877B1

    公开(公告)日：2014-12-30

    申请号：US13958777

    申请日：2013-08-05

    申请人： Northrop Grumman Systems Corporation

    发明人： Gregory D. Goodno ,  Stuart McNaught ,  Peter Thielen ,  Joshua Rothenberg ,  Marty Wacks

    IPC分类号： H01S3/131

    CPC分类号： H01S3/06754 ,  H01S3/0085 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1307 ,  H01S3/1308 ,  H01S3/2308 ,  H01S3/2383

    摘要： A system and method for controlling polarization in a fiber amplifier is disclosed. A polarization dither waveform is applied to a polarization controller so that dithering does not trigger PI-HOMI (Polarization-Induced High Order Mode Instability). The dither waveform may have a period that is much less than the thermal diffusion time across the fiber amplifier core. The dither waveform may also have a slew rate (defined in degrees/second on the Poincaré sphere) that is much slower than the thermal diffusion time across the fiber amplifier core.

    摘要翻译： 公开了一种用于控制光纤放大器中的偏振的系统和方法。 极化抖动波形被施加到偏振控制器，使得抖动不会触发PI-HOMI（极化诱导的高阶模式不稳定性）。 抖动波形可以具有远小于光纤放大器芯上的热扩散时间的周期。 抖动波形还可以具有比在光纤放大器核心上的热扩散时间慢得多的压摆率（在Poincaré球上以度/秒定义）。

    Output power control for harmonic-generating laser
    6.
    发明授权
    Output power control for harmonic-generating laser 有权
    谐波发生激光器的输出功率控制

    公开(公告)号：US07916764B2

    公开(公告)日：2011-03-29

    申请号：US11586987

    申请日：2006-10-25

    申请人： Charles Xiaoyi Wang

    发明人： Charles Xiaoyi Wang

    IPC分类号： H01S3/10

    CPC分类号： H01S3/1305 ,  G02F1/37 ,  H01S3/1308 ,  H01S3/137

    摘要： In harmonic-generating laser apparatus, plane-polarized fundamental radiation of a laser is converted to harmonic radiation by an optically nonlinear crystal. The power of harmonic radiation generated by the apparatus is selectively varied by selectively rotating the plane of polarization of fundamental radiation entering the optically nonlinear crystal.

    摘要翻译： 在谐波产生激光装置中，激光的平面偏振基波辐射由光学非线性晶体转换成谐波辐射。 通过选择性地旋转进入光学非线性晶体的基本辐射的偏振平面，选择性地改变由装置产生的谐波辐射的功率。

    Method and Apparatus for Polarization Determination and/or Control in Optical Fiber Amplifying Systems
    10.
    发明申请
    Method and Apparatus for Polarization Determination and/or Control in Optical Fiber Amplifying Systems 有权
    用于光纤放大系统中极化测定和/或控制的方法和装置

    公开(公告)号：US20160141828A1

    公开(公告)日：2016-05-19

    申请号：US14899991

    申请日：2014-06-23

    申请人： NUFERN

    发明人： Peyman Ahmadi ,  Imtiaz Majid ,  Cyril Guintrand

    IPC分类号： H01S3/13 ,  H01S3/00 ,  G02B6/024 ,  H01S3/067

    CPC分类号： H01S3/1308 ,  G02B6/024 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/10015 ,  H01S3/10061 ,  H01S3/1301

    摘要： Methods and apparatuses for determining the polarization state and for providing polarization control in optical fiber lasers and amplifiers. One embodiment of the invention is an optical fiber amplifying system including a circulator (260) having a first optical port (260a), a second optical port (260b) that is configured to output radiation received from the first optical port, and a third optical port (260c) that is configured to output radiation received from the second optical port; one or more amplifier stages (216) connected in series, together having an optical input (216a) optically coupled to the second port of the circulator, and an optical output (216b); and a polarization detector (240) having an optical input optically coupled to the third port of the circulator. Thereby the polarization state of the amplified radiation can be determined using radiation backscattered from the amplifying stage.

    摘要翻译： 用于确定偏振状态并用于在光纤激光器和放大器中提供偏振控制的方法和装置。 本发明的一个实施例是一种光纤放大系统，包括具有第一光端口（260a）的环行器（260），被配置为输出从第一光端口接收的辐射的第二光端口（260b） 端口（260c），被配置为输出从所述第二光口接收的辐射; 串联连接的一个或多个放大器级（216），一起具有光耦合到环行器的第二端口的光输入（216a）和光输出（216b）; 和具有光耦合到所述循环器的第三端口的光输入的偏振检测器（240）。 因此，可以使用从放大级反向散射的辐射来确定放大的辐射的偏振状态。