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    Variable polarization-dependent-loss source
    5.
    发明授权
    Variable polarization-dependent-loss source 有权
    可变偏振相关损耗源

    公开(公告)号：US06975454B1

    公开(公告)日：2005-12-13

    申请号：US10209824

    申请日：2002-07-31

    申请人： Lianshan Yan ,  X. Steve Yao

    发明人： Lianshan Yan ,  X. Steve Yao

    IPC分类号： G02B6/27 ,  G02B27/28

    CPC分类号： G02B6/2793 ,  G02B6/272 ,  H04B10/2572 ,  Y10S359/90

    摘要： An optical device including a beam splitter, polarization controller, and beam combiner is described. In some embodiments, the beam splitter and beam combiner are provided in a single element. An incoming light beam is split into two beams with different polarization components. The polarization of one or both of the beams is rotated using one or two polarization controllers such as fiber squeezers. The beams are then combined, so that a portion of each of the beams is provided to an output. The polarization dependent loss of the device can then be controlled by controlling the polarization rotation. In some embodiments, the rotation is dynamically controlled.

    摘要翻译： 描述了包括分束器，偏振控制器和光束组合器的光学装置。 在一些实施例中，分束器和光束组合器设置在单个元件中。 入射光束被分成具有不同偏振分量的两个光束。 使用一个或两个偏振控制器（诸如光纤挤压器）使一个或两个光束的偏振旋转。 然后将光束组合，使得每个光束的一部分被提供给输出。 然后可以通过控制偏振旋转来控制器件的偏振相关损耗。 在一些实施例中，动态地控制旋转。

    Optical Depolarizers and DGD Generators Based on Optical Delay
    7.
    发明申请
    Optical Depolarizers and DGD Generators Based on Optical Delay 有权
    基于光延迟的光偏振器和DGD发生器

    公开(公告)号：US20090225420A1

    公开(公告)日：2009-09-10

    申请号：US12468801

    申请日：2009-05-19

    申请人： X. Steve Yao ,  Jane Chen ,  Yongqiang Shi

    发明人： X. Steve Yao ,  Jane Chen ,  Yongqiang Shi

    IPC分类号： G02B5/30

    CPC分类号： G02B27/283 ,  G02B6/272 ,  G02B6/278 ,  G02B6/2786 ,  G02B27/286 ,  G02F1/0136 ,  G02F1/09 ,  G02F2001/0139

    摘要： Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the first and second optical beams to undergo different optical path lengths before they are recombined into a single output beam. An adjustment mechanism may used implemented to adjust the difference in the optical path lengths of the first and second beams to produce a variable DGD. When the depolarization of light is desired, the difference in the optical path lengths of the first and second beams is set to be greater than the coherence length of the input optical beam.

    摘要翻译： 用于去光偏振并产生光信号中的可变差分组延迟的技术和装置。 在一个实现中，输入光束被分成具有正交偏振的第一和第二光束。 然后使用一个或两个光反射器来使第一和第二光束在被重新组合成单​​个输出光束之前经历不同的光程长度。 可以使用调整机构来调整第一和第二光束的光程长度的差异以产生可变DGD。 当需要光的去极化时，第一和第二光束的光程长度的差被设定为大于输入光束的相干长度。

    In-line optical polarimeter using free-space polarization sampling elements
    8.
    发明授权
    In-line optical polarimeter using free-space polarization sampling elements 有权
    使用自由空间偏振采样元件的在线光学偏振计

    公开(公告)号：US07265836B1

    公开(公告)日：2007-09-04

    申请号：US11025662

    申请日：2004-12-28

    申请人： X. Steve Yao

    发明人： X. Steve Yao

    IPC分类号： G01J4/00

    CPC分类号： G01J4/00

    摘要： This application teaches various implementations of methods and in-line polarimeters with free-space sampling elements to sample four sample beams for determining the polarization state of input light. In one exemplary implementation, a device in this application includes four optical polarization analyzers arranged in series to form an optical path in free space to split four sample beams with four different states of polarization from an input optical beam propagating along the optical path. Each optical polarization analyzer transmits a majority of the input optical beam along the optical path and splits a fraction of the input beam as a respective sample beam. The device also includes four optical detectors respectively positioned in optical paths of the four sample beams to convert the sample beams into four detector signals indicative of optical power levels of the four different states of polarization, respectively.

    摘要翻译： 该应用教导了具有自由空间采样元件的方法和在线偏振计的各种实施方式来采样四个采样光束以确定输入光的偏振状态。 在一个示例性实施方案中，本申请中的装置包括串联布置的四个光学偏振分析器，以在自由空间中形成光路，以分离具有沿着光路传播的输入光束的四个不同偏振态的四个采样光束。 每个光学偏振分析仪沿着光路传输大部分输入光束，并将一部分输入光束分成相应的样本光束。 该装置还包括四个光学检测器，分别位于四个采样光束的光路中，以将采样光束分别转换成四个检测器信号，分别指示四个不同偏振态的光功率电平。

    Optical devices with folded optical path designs
    9.
    发明授权
    Optical devices with folded optical path designs 有权
    具有折叠光路设计的光学设备

    公开(公告)号：US07157687B1

    公开(公告)日：2007-01-02

    申请号：US10677809

    申请日：2003-10-01

    申请人： X. Steve Yao

    发明人： X. Steve Yao

    IPC分类号： G02F1/01 ,  H01J3/14

    CPC分类号： G02F1/093

    摘要： Optical devices with folded optical paths to reduce size of optical devices and optical elements in the optical devices. The folded optical paths operate by manipulating optical polarization of light. Exemplary optical switches and variable optical attenuators are described.

    摘要翻译： 具有折叠光路的光学装置，以减小光学装置中的光学装置和光学元件的尺寸。 折叠的光路通过操纵光的偏振来操作。 描述了示例性光开关和可变光衰减器。