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18 条记录 (耗时 0.024 秒)

    Waveplate analyzer based on multiple tunable optical polarization rotators
    4.
    发明授权
    Waveplate analyzer based on multiple tunable optical polarization rotators 有权
    基于多个可调光偏振旋转器的波片分析仪

    公开(公告)号：US07952711B1

    公开(公告)日：2011-05-31

    申请号：US12056262

    申请日：2008-03-26

    申请人： Xiaojun Chen ,  Lianshan Yan ,  Xiaotian Steve Yao

    发明人： Xiaojun Chen ,  Lianshan Yan ,  Xiaotian Steve Yao

    IPC分类号： G01J4/00

    CPC分类号： G01N21/23

    摘要： Systems, apparatus and methods for characterizing linear retarders using a waveplate analyzer constructed by polarization rotators. In one implementation of such an analyzer, both the retardation of the waveplate sample and the orientation of optical axis of the waveplate sample can be simultaneously measured.

    摘要翻译： 使用由偏振旋转器构成的波片分析仪来表征线性延迟器的系统，装置和方法。 在这种分析仪的一个实现中，可以同时测量波片样品的延迟和波片样品的光轴的取向。

    Optical differential group delay module with folded optical path
    6.
    发明授权
    Optical differential group delay module with folded optical path 有权
    具有折叠光路的光学差分组延迟模块

    公开(公告)号：US07723670B1

    公开(公告)日：2010-05-25

    申请号：US12055685

    申请日：2008-03-26

    申请人： Lianshan Yan ,  Xiaojun Chen ,  Xiaotian Steve Yao

    发明人： Lianshan Yan ,  Xiaojun Chen ,  Xiaotian Steve Yao

    IPC分类号： G02F1/01

    CPC分类号： G02B6/2713 ,  G02F1/0136 ,  H04B10/07951

    摘要： Differential group delay (DGD) devices and techniques based on folded optical paths. An in-line polarization monitor can be provided as a feedback for worst-case alignment without using an in-line polarizer. Polarization maintaining retro reflectors can minimize the introduced higher-order polarization effects caused by reflections between folding mirrors or prisms in conventional schemes.

    摘要翻译： 基于折叠光路的差分组延迟（DGD）器件和技术。 可以提供在线偏振监视器作为用于最坏情况对准的反馈而不使用在线偏振器。 偏振维持复古反射器可以将传统方案中折叠镜或棱镜之间的反射引起的高阶极化效应最小化。

    Autocorrelation Technique Based on Measurement of Polarization Effects of Optical Pulses
    8.
    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
    10.
    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。