Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system
    3.
    发明授权
    Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system 有权
    色散监测方法和色散监测装置,以及光传输系统

    公开(公告)号:US07769299B2

    公开(公告)日:2010-08-03

    申请号:US11475046

    申请日:2006-06-27

    IPC分类号: H04B10/12 H04B10/00

    摘要: A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.

    摘要翻译: 根据本发明的色散监视装置包括:光电转换光信号的光电检测器; 将光电转换电信号的频带宽度限制在根据光信号的调制格式及其比特率设定的范围内的低通滤波器; DC消除电路,其消除带宽受限电信号的直流分量; 以及功率检测器,其检测带宽受限电信号的功率,以检测光信号的残余色散。 结果,可以容易地实现也能够排列在一起的低成本的色散监视装置。

    Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system
    4.
    发明申请
    Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system 有权
    色散监测方法和色散监测装置,以及光传输系统

    公开(公告)号:US20070177876A1

    公开(公告)日:2007-08-02

    申请号:US11475046

    申请日:2006-06-27

    IPC分类号: H04B10/12

    摘要: A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.

    摘要翻译: 根据本发明的色散监视装置包括:光电转换光信号的光电检测器; 将光电转换电信号的频带宽度限制在根据光信号的调制格式及其比特率设定的范围内的低通滤波器; DC消除电路,其消除带宽受限电信号的直流分量; 以及功率检测器,其检测带宽受限电信号的功率,以检测光信号的残余色散。 结果,可以容易地实现也能够排列在一起的低成本的色散监视装置。

    Optical signal processing apparatus
    6.
    发明授权
    Optical signal processing apparatus 有权
    光信号处理装置

    公开(公告)号:US08331779B2

    公开(公告)日:2012-12-11

    申请号:US12659270

    申请日:2010-03-02

    IPC分类号: H04J14/00

    摘要: An OADM in a wavelength division multiplexing transmission system includes a wavelength selection switch that selects a predetermined wavelength from a multiple optical signal obtained by multiplexing a phase modulated signal and an intensity modulated signal and outputs the selected wavelength signal to a predetermined output port. The wavelength selection switch has a different delay for each wavelength of the multiple optical signal. For example, the wavelength selection switch includes a mirror array. Optical paths from the surfaces of mirrors arranged on the mirror array to the diffraction grating are different in the case of adjacent mirrors.

    摘要翻译: 波分复用传输系统中的OADM包括波长选择开关,其从通过复用相位调制信号和强度调制信号获得的多个光信号中选择预定波长,并将所选择的波长信号输出到预定输出端口。 波长选择开关对于多个光信号的每个波长具有不同的延迟。 例如,波长选择开关包括反射镜阵列。 在相邻反射镜的情况下,从反射镜阵列上布置在反射镜阵列上的反射镜的表面的光路不同。

    Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus
    10.
    发明授权
    Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus 有权
    光发送装置,增加设备路径数量的方法以及用于增加设备路径数量的光开关模块

    公开(公告)号:US07620321B2

    公开(公告)日:2009-11-17

    申请号:US11092547

    申请日:2005-03-29

    IPC分类号: H04J14/00

    摘要: An optical transmitting apparatus is configured such that K pieces of output ports of optical path switching units whose input port is connected to k-th input transmission path are connected to first to K-th output transmission paths except for the k-th output transmission path and to the k-th input port of a dropping unit, and the optical path switching units and the dropping unit outputs light of wavelength which is part or all of WDM light received from said input port from a specific output port, and can output light having a wavelength different from that of the light output from said specific output port from an output port different from said specific output port. Accordingly, while largely reducing the number of optical fiber patch cords necessary in an optical transmitting apparatus and largely reducing the number of spare ports, the flexible expansion of apparatus function can be realized.

    摘要翻译: 光发送装置被配置为使得输入端口连接到第k输入传输路径的光路切换单元的K个输出端口连接到除第k输出传输路径之外的第一至第K输出传输路径 并将光路切换部和滴下部从特定的输出端口输出从所述输入口接收到的WDM光的一部分或全部的波长的光,并输出光 具有与从所述特定输出端口输出的光的波长不同于与所述特定输出端口不同的输出端口的波长。 因此,在大大减少光发送装置所需的光纤跳线的数量的同时大大减少备用端口的数量的情况下,可以实现设备功能的灵活扩展。