利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

18 条记录 (耗时 0.027 秒)

    Autocorrelation Technique Based on Measurement of Polarization Effects of Optical Pulses
    1.
    发明申请
    Autocorrelation Technique Based on Measurement of Polarization Effects of Optical Pulses 审中-公开
    基于光脉冲极化效应测量的自相关技术

    公开(公告)号：US20060244951A1

    公开(公告)日：2006-11-02

    申请号：US11308049

    申请日：2006-03-03

    申请人： Ting Luo ,  Changyuan Yu ,  Zhongqi Pan ,  Lianshan Yan ,  Saurabh Kumar ,  Alan Willner

    发明人： Ting Luo ,  Changyuan Yu ,  Zhongqi Pan ,  Lianshan Yan ,  Saurabh Kumar ,  Alan Willner

    IPC分类号： G01J1/00

    CPC分类号： G01J11/00

    摘要： Autocorrelation technique for measurement of width of optical short pulses based on polarization effects. The optical pulse is split into two orthogonal polarization states and these two replicas have a relative delay which depolarizes the pulse. By tuning the relative delay of the two replicas and measuring the degree-of-polarization (DOP) of the pulse or the induced polarimetric four-wave mixing (FWM) through nonlinear media, the pulse's temporal width can be accurately derived. The technique can be all-fiber-based, wavelength independent, cost effective, applicable to low optical power, and does not require significant optical alignment.

    摘要翻译： 基于极化效应测量光学短脉冲宽度的自相关技术。 光脉冲分为两个正交极化状态，这两个复制品具有使脉冲去极化的相对延迟。 通过调整两个副本的相对延迟并通过非线性介质测量脉冲或感应极化四波混频（FWM）的极化度（DOP），可以准确地推导出脉冲的时间宽度。 该技术可以是全光纤，波长独立，成本有效，适用于低光功率，并且不需要显着的光学对准。

    MONITORING AND IN-LINE COMPENSATION OF POLARIZATION DEPENDENT LOSS FOR LIGHTWAVE SYSTEMS
    3.
    发明申请
    MONITORING AND IN-LINE COMPENSATION OF POLARIZATION DEPENDENT LOSS FOR LIGHTWAVE SYSTEMS 审中-公开
    监控和在线补偿轻型系统偏振相关损失

    公开(公告)号：US20080038000A1

    公开(公告)日：2008-02-14

    申请号：US11735859

    申请日：2007-04-16

    申请人： Qian Yu ,  Lianshan Yan ,  Alan Willner

    发明人： Qian Yu ,  Lianshan Yan ,  Alan Willner

    IPC分类号： H04B10/04 ,  H04B10/06

    CPC分类号： H04B10/2572

    摘要： A multi-wavelength optical signal copropagates through a fiber-optic communication link with a continuous-wave ancillary wavelength having an unknown state of polarization (SOP), which is scrambled periodically in time. The instantaneous value of polarization dependent loss (PDL) in the ancillary wavelength is monitored in real time, and is used as an error signal to adjust at least one polarization controller. Polarization scrambling is performed by periodically changing the SOP with time, such that the polarization-scrambled optical signal covers approximately an entire Poincaré sphere surface, preferably uniformly, during each time period. At an optical node between fibers, an adjustable PDL compensator contains two ordered pairs each consisting of one polarization controller and one optical element introducing fixed PDL.

    摘要翻译： 多波长光信号通过具有未知极化状态（SOP）的连续波辅助波长的光纤通信链路共同繁殖，其周期性地被加扰。 在实时监测辅助波长偏振相关损耗（PDL）的瞬时值，并用作误差信号来调节至少一个偏振控制器。 通过周期性地改变SOP随时间进行极化加扰，使得偏振加扰的光信号在每个时间段期间大致整个Poincaré球面，优选均匀地覆盖。 在光纤之间的光节点处，可调PDL补偿器包含两个有序对，每对由一个偏振控制器和一个引入固定PDL的光学元件组成。

    Monitoring and in-line compensation of polarization dependent loss for lightwave systems
    8.
    发明授权
    Monitoring and in-line compensation of polarization dependent loss for lightwave systems 失效
    光波系统偏振相关损耗的监测和在线补偿

    公开(公告)号：US07206517B1

    公开(公告)日：2007-04-17

    申请号：US10099875

    申请日：2002-03-15

    申请人： Qian Yu ,  Lianshan Yan ,  Alan E. Willner

    发明人： Qian Yu ,  Lianshan Yan ,  Alan E. Willner

    IPC分类号： H04B10/00

    CPC分类号： H04B10/2572

    摘要： A multi-wavelength optical signal copropagates through a fiber-optic communication link with a continuous-wave ancillary wavelength having an unknown state of polarization (SOP), which is scrambled periodically in time. The instantaneous value of polarization dependent loss (PDL) in the ancillary wavelength is monitored in real time, and is used as an error signal to adjust at least one polarization controller. Polarization scrambling is performed by periodically changing the SOP with time, such that the polarization-scrambled optical signal covers approximately an entire Poincaré sphere surface, preferably uniformly, during each time period. At an optical node between fibers, an adjustable PDL compensator contains two ordered pairs each consisting of one polarization controller and one optical element introducing fixed PDL.

    摘要翻译： 多波长光信号通过具有未知极化状态（SOP）的连续波辅助波长的光纤通信链路共同繁殖，其周期性地被加扰。 在实时监测辅助波长偏振相关损耗（PDL）的瞬时值，并用作误差信号来调节至少一个偏振控制器。 通过周期性地改变SOP随时间进行极化加扰，使得偏振加扰的光信号在每个时间段期间大致整个Poincaré球面，优选地均匀地覆盖。 在光纤之间的光节点处，可调PDL补偿器包含两个有序对，每对由一个偏振控制器和一个引入固定PDL的光学元件组成。

    Variable polarization-dependent-loss source
    9.
    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。