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    Method and apparatus to compensate for polarization mode dispersion
    4.
    发明授权
    Method and apparatus to compensate for polarization mode dispersion 失效

    公开(公告)号：US06647176B1

    公开(公告)日：2003-11-11

    申请号：US10219374

    申请日：2002-08-15

    申请人： Hok Yong Pua ,  Chris Allen ,  Ken Demarest ,  Ron Hui ,  Kumar Vijay Peddanarappagari

    发明人： Hok Yong Pua ,  Chris Allen ,  Ken Demarest ,  Ron Hui ,  Kumar Vijay Peddanarappagari

    IPC分类号： G02B600

    CPC分类号： H04B10/2569

    摘要： A polarization scrambler and a polarization mode dispersion (PMD) compensation system compensate for PMD on an active optic fiber. The polarization scrambler scrambles a state of polarization of an optical signal that carries user information. The PMD compensation system then receives the optical signal over the active optic fiber. The PMD compensation system measuring a differential group delay and principal states of polarization of the PMD in the active optic fiber. The PMD compensation system then determines a modification of the optical signal based on the differential group delay and the principal states of polarization of the PMD. The PMD compensation system modifies the optical signal in the active optic fiber to compensate for PMD based on the determination of the modification. The PMD compensation system then transmits the optical signal. By measuring the differential group delay and the principal states of polarization, the PMD compensation system adapts to changes in the PMD in the active optic fiber.

    Optical network protection switching architecture
    5.
    发明授权
    Optical network protection switching architecture 失效
    光网络保护交换架构

    公开(公告)号：US07421197B2

    公开(公告)日：2008-09-02

    申请号：US10349140

    申请日：2003-01-21

    申请人： Paparao Palacharla ,  Kumar Vijay Peddanarappagari

    发明人： Paparao Palacharla ,  Kumar Vijay Peddanarappagari

    IPC分类号： H04B10/00

    CPC分类号： H04J14/0297 ,  H04J14/0227 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0286 ,  H04J14/0294 ,  H04J14/0295

    摘要： A method for protection switching includes receiving an optical signal from a transponder coupled to a client and optically splitting the signal to a first output and a second output. The first output is coupled by a first optical add-drop multiplexer to a first optical fiber, and the second output is coupled by a second add-drop multiplexer to a second fiber. The method further includes selecting one of the output signals for the working channel, and communicating the selected output signal to an optical network. During communication of the selected output signal to the optical network, the method includes monitoring for a failure condition in the optical network and, if the failure condition is detected, selecting the other output signal as the working channel and communicating the new selected output signal.

    摘要翻译： 一种用于保护切换的方法包括从耦合到客户机的应答器接收光学信号，并将该信号光学分解成第一输出和第二输出。 第一输出由第一光分插复用器耦合到第一光纤，第二输出由第二分插复用器耦合到第二光纤。 该方法还包括选择工作信道的输出信号之一，并将选择的输出信号传送到光网络。 在所选择的输出信号与光网络通信期间，该方法包括监视光网络中的故障状况，如果检测到故障条件，则选择另一输出信号作为工作信道并传送新选择的输出信号。

    Method and apparatus to compensate for polarization mode dispersion
    8.
    发明授权
    Method and apparatus to compensate for polarization mode dispersion 失效
    补偿偏振模色散的方法和装置

    公开(公告)号：US06459830B1

    公开(公告)日：2002-10-01

    申请号：US09500092

    申请日：2000-02-08

    申请人： Hok Yong Pua ,  Chris Allen ,  Ken Demarest ,  Ron Hui ,  Kumar Vijay Peddanarappagari

    发明人： Hok Yong Pua ,  Chris Allen ,  Ken Demarest ,  Ron Hui ,  Kumar Vijay Peddanarappagari

    IPC分类号： G02B628

    CPC分类号： H04B10/2569

    摘要： A polarization scrambler and a polarization mode dispersion (PMD) compensation system compensate for PMD on an active optic fiber. The polarization scrambler scrambles a state of polarization of an optical signal that carries user information. The PMD compensation system then receives the optical signal over the active optic fiber. The PMD compensation system measuring a differential group delay and principal states of polarization of the PMD in the active optic fiber. The PMD compensation system then determines a modification of the optical signal based on the differential group delay and the principal states of polarization of the PMD. The PMD compensation system modifies the optical signal in the active optic fiber to compensate for PMD based on the determination of the modification. The PMD compensation system then transmits the optical signal. By measuring the differential group delay and the principal states of polarization, the PMD compensation system adapts to changes in the PMD in the active optic fiber.

    摘要翻译： 偏振加扰器和偏振模色散（PMD）补偿系统补偿有源光纤上的PMD。 极化扰码器加扰携带用户信息的光信号的极化状态。 然后，PMD补偿系统通过有源光纤接收光信号。 PMD补偿系统测量有源光纤中PMD的差分群延迟和主要偏振状态。 然后，PMD补偿系统基于差分组延迟和PMD的主要极化状态确定光信号的修改。 PMD补偿系统根据修改的确定修改有源光纤中的光信号，以补偿PMD。 然后PMD补偿系统发送光信号。 通过测量差分组延迟和主要的极化状态，PMD补偿系统适应有源光纤中PMD的变化。