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    METHOD OF SWITCHING OPTICAL PATH, AND APPARATUS THEREOF
    2.
    发明公开
    METHOD OF SWITCHING OPTICAL PATH, AND APPARATUS THEREOF 有权
    VERFAHREN UND VORRICHTUNGFÜRSTRAHLENGANGWECHSEL

    公开(公告)号：EP2360858A1

    公开(公告)日：2011-08-24

    申请号：EP09830328.2

    申请日：2009-11-24

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： TSUJIMURA, Takeshi ,  TANAKA, Kuniaki ,  YOSHIDA, Koichi ,  KATAYAMA, Kazunori ,  AZUMA, Yuji ,  SHIMIZU, Masatoshi

    IPC分类号： H04B10/12 ,  H04B1/74 ,  H04B10/02 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14 ,  H04B10/20

    CPC分类号： H04J14/02 ,  H04B10/032 ,  H04J14/002 ,  H04J14/0221 ,  H04J14/0294 ,  H04J14/0295 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0043 ,  H04Q2011/0081

    摘要： Terminals of upstream and downstream sides of an in-service line and a detour line are connected by optical couplers. An optical oscilloscope is connected to one optical coupler, and a chirped pulse light source is connected to the other optical coupler to thereby form dualized lines. The detour line includes an optical line length adjuster for compensating for the phase difference of optical transmission signals that occurs because of the optical line length difference with the in-service line. Pulse light in which an optical frequency is chirped is transmitted from the chirped pulse light source. The pulse light is branched by the second optical coupler, passes through the in-service line and the detour line, is multiplexed again by the first optical coupler, and is measured by the optical oscilloscope. While matching an arrival time of the pulse light, the optical line length is adjusted by the optical line length adjuster so as to minimize the size of upper and lower limits of an interference waveform generated in an upper part of the pulse light waveform or so as to make a frequency of an interference waveform become zero.

    摘要翻译： 在线和迂回线的上游侧和下游侧的端子通过光耦合器连接。 光学示波器连接到一个光耦合器，并且啁啾脉冲光源连接到另一个光耦合器，从而形成二元化线。 迂回线包括光线路长度调节器，用于补偿由于与在线线路的光线路长度差异而发生的光传输信号的相位差。 从啁啾脉冲光源发射光频率啁啾的脉冲光。 脉冲光由第二光耦合器分支，通过在用线路和迂回线路，由第一光耦合器再次复用，并由光示波器测量。 在匹配脉冲光的到达时间的同时，通过光线路长度调节器调整光线路长度，以使脉冲光波形的上部产生的干扰波形的上限和下限的大小最小化， 使得干扰波形的频率变为零。