Optical communication system and apparatus for compensation or emulation of PMD effects
    1.
    发明授权
    Optical communication system and apparatus for compensation or emulation of PMD effects 失效
    用于补偿或仿真PMD效应的光通信系统和设备

    公开(公告)号:US07082229B2

    公开(公告)日:2006-07-25

    申请号:US10469809

    申请日:2002-02-28

    IPC分类号: G02B6/00

    CPC分类号: H04B10/2569

    摘要: An apparatus for compensation or emulation of polarization mode dispersion (PMD) effects occurring in an optical signal traveling over an optical fiber based link comprises controllable birefringence sections and devices for polarization conversion. Each section comprises birefringence optical members or parts thereof, and each section is followed or preceded by one of the controllable devices for polarization conversion. The birefringence sections are at least three in number, and at least one of these has a propagation delay different from that of the other sections. The apparatus comprises a detection device for PMD output and control of the controllable devices for feedback adjustment.

    摘要翻译: 用于补偿或仿真在基于光纤的链路上行进的光信号中发生的偏振模色散(PMD)效应的装置包括可控双折射部分和用于偏振转换的装置。 每个部分包括双折射光学部件或其部分,并且每个部分之后或之前是用于偏振转换的可控制器件之一。 双折射部分数量至少为三个,并且这些中的至少一个具有与其它部分不同的传播延迟。 该装置包括用于PMD输出的检测装置和用于反馈调节的可控装置的控制。

    Method and apparatus for detection and compensation of PMD parameters in signals transmitted over optical fiber links and system of communication therewith
    2.
    发明授权
    Method and apparatus for detection and compensation of PMD parameters in signals transmitted over optical fiber links and system of communication therewith 失效
    用于检测和补偿通过光纤链路传输的信号中的PMD参数的检测和补偿方法及装置

    公开(公告)号:US07013085B2

    公开(公告)日:2006-03-14

    申请号:US10469807

    申请日:2002-03-04

    IPC分类号: H04B10/18

    CPC分类号: H04B10/2569

    摘要: A method of detecting polarization mode dispersion (PMD) indicative parameters of an optical fiber link comprising at least one transmission channel in which is transmitted a first wideband optical signal with a bandwidth divided into sub-bands. For each sub-band is produced a second reference optical signal with which to find a third optical signal by superposition. For each of the third signals are calculated first parameters considered indicative of the PMD thereof, and with the first parameters of all the sub-bands are calculated second parameters considered indicative of the PMD of the first wideband signal. The method can be used as part of a PMD compensation method for a transmission system employing the parameters calculated for feedback piloting of a PMD compensator. A detection apparatus comprises a generator for generation of the second reference optical signals, an optical mixer for producing superimposition of the first and second signals, one or more photodetectors for finding the electrical beat signal or the first and second signals, a calculation device for calculating the first parameters, and a processor for processing all the first parameters to find therefrom the second parameters which will then be furthered processed. The detection apparatus can be part of a compensation apparatus comprising the compensator and a calculation stage for calculating the compensation and piloting the compensator. The entirety can be part of an optical fiber communication system.

    摘要翻译: 一种检测包括至少一个传输信道的光纤链路的偏振模色散(PMD)指示参数的方法,其中传输具有被划分为子带的带宽的第一宽带光信号。 对于每个子带产生第二参考光信号,通过该第二参考光信号通过叠加来找到第三光信号。 对于每个第三信号是计算的第一参数被考虑指示其PMD,并且所有子带的第一参数被计算出被认为表示第一宽带信号的PMD的第二参数。 该方法可以用作采用为PMD补偿器的反馈引导计算的参数的传动系统的PMD补偿方法的一部分。 检测装置包括用于产生第二参考光信号的发生器,用于产生第一和第二信号的叠加的光学混合器,用于找到电差拍信号或第一和第二信号的一个或多个光电检测器,用于计算 第一参数,以及用于处理所有第一参数以从中发现第二参数的处理器,然后第二参数将被进一步处理。 检测装置可以是包括补偿器的补偿装置的一部分,以及用于计算补偿和引导补偿器的计算阶段。 整体可以是光纤通信系统的一部分。

    Apparatus for measuring characteristics of an optical fiber
    5.
    发明授权
    Apparatus for measuring characteristics of an optical fiber 有权
    用于测量光纤特性的设备

    公开(公告)号:US06229599B1

    公开(公告)日:2001-05-08

    申请号:US09355293

    申请日:1999-07-26

    申请人: Andrea Galtarossa

    发明人: Andrea Galtarossa

    IPC分类号: G01N2100

    摘要: The present invention aims to provide apparatus to measure the beat length, the correlation length, the polarization mode dispersion and other characteristics of single mode optical fibers related to the two polarization modes of the fiber at different positions along the length of the fiber. The present invention also aims to provide apparatus for the measurement of characteristics of an optical fiber with access to only one end of the fiber.

    摘要翻译: 本发明旨在提供一种装置,用于测量沿纤维长度在不同位置处的纤维的两种偏振模式相关的单模光纤的拍子长度,相关长度,偏振模色散和其它特性。 本发明的目的还在于提供一种用于测量光纤特性的设备,该设备只能访问光纤的一端。