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4 条记录 (耗时 0.008 秒)

    Method and apparatus for optical performance monitoring
    1.
    发明申请
    Method and apparatus for optical performance monitoring 审中-公开
    光学性能监测的方法和装置

    公开(公告)号：US20050232627A1

    公开(公告)日：2005-10-20

    申请号：US10827306

    申请日：2004-04-20

    申请人： Fengguo Sun ,  GaoZhi Xiao ,  Zhenguo Lu ,  Chander Grover

    发明人： Fengguo Sun ,  GaoZhi Xiao ,  Zhenguo Lu ,  Chander Grover

    IPC分类号： H04B10/02 ,  H04B10/08

    CPC分类号： H04B10/07953

    摘要： Method and apparatus for real time measuring of an optical signal to noise ration (OSNR) of an optical channel is disclosed. The apparatus comprises a fiber Bragg grating for reflecting a signal component of the optical channel and for transmitting a noise component of the optical channel therethrough. Two photodetectors are provided disposed at two ends of the fiber Bragg grating for detecting a fraction of the reflected signal component and the transmitted noise component respectively. Electrical outputs of the photodetectors are communicated to a microprocessor for determining the OSNR. The invention provides a simple, compact, reliable, relatively fast and inexpensive technique to monitor OSNR.

    摘要翻译： 公开了用于光信道的光信噪比（OSNR）的实时测量的方法和装置。 该装置包括光纤布拉格光栅，用于反射光通道的信号分量，并用于传输光通道的噪声分量。 提供两个光电探测器设置在光纤布拉格光栅的两端，用于分别检测反射信号分量和发射噪声分量的一部分。 将光电检测器的电输出传送到微处理器以确定OSNR。 本发明提供了一种简单，紧凑，可靠，相对快速和便宜的监控OSNR的技术。

    Method and apparatus for measuring polarization-mode dispersion
    3.
    发明授权
    Method and apparatus for measuring polarization-mode dispersion 失效
    用于测量偏振模色散的方法和装置

    公开(公告)号：US06947129B1

    公开(公告)日：2005-09-20

    申请号：US10842495

    申请日：2004-05-11

    申请人： Zhenguo Lu ,  Fengguo Sun ,  GaoZhi Xiao ,  Chander P. Grover

    发明人： Zhenguo Lu ,  Fengguo Sun ,  GaoZhi Xiao ,  Chander P. Grover

    IPC分类号： G01M11/00 ,  G01N21/00

    CPC分类号： G01M11/336

    摘要： Polarization-mode dispersion (PMD) of an optical device, i.e. fiber or component is effected by launching a first pump laser beam of a fixed wavelength, a probe laser beam with a second fixed wavelength and a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the other two beams into an optical device to generate three output signals which are input into a semiconductor optical amplifier to generate four-wave mixing (FWM) products. The average PMD of the device is computed by measuring the power of the FWM products versus the wavelength of the second pump laser beam.

    摘要翻译： 通过发射固定波长的第一泵激光束，具有第二固定波长的探针激光束和具有可变波长的第二泵浦激光束来实现光学装置即光纤或分量的偏振模色散（PMD） 将与其他两个光束正交的偏振方向转换成光学装置，以产生输入到半导体光放大器中以产生四波混频（FWM）产物的三个输出信号。 通过测量FWM产品的功率与第二泵浦激光束的波长来计算装置的平均PMD。