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    • 8. 发明专利
    • Polarization mode dispersion compensating apparatus
    • 极化模式分散补偿装置
    • JP2003318830A
    • 2003-11-07
    • JP2002316059
    • 2002-10-30
    • Mitsubishi Electric Corp三菱電機株式会社
    • TAKABAYASHI MASAKAZUMATSUMOTO SADAYUKIYOSHIARA KIICHIOHIRA TAKUYAHOSHIZAKI JUNICHIROMATSUNO SHIGERUNAMIKI RYOSUKEHASHIMOTO MINORU
    • G02B26/00G02B6/02G02B6/34G02B27/28H04B10/07H04B10/2507H04B10/2569H04J14/00H04J14/02H04B10/02H04B10/18
    • G02B6/278G02B6/022G02B6/02204G02B6/2932G02B6/4246H04B10/2569
    • PROBLEM TO BE SOLVED: To control a polarization controller, etc., surely and at high speed in comparison with the conventional technology. SOLUTION: The polarization controller 1 controls a polarization state of an optical signal so that a polarization axis of an optical signal to be inputted is practically coincident with an optical axis of an optical transmission line. A polarization separator and synthesizer 3 separates optical signals with two mutually and orthogonally crossed polarization components from the optical signal to be outputted from the polarization controller 1 and to be inputted via a first port P1, outputs the polarization components via second and third ports P2, P3 and on the other hand, multiplexes two optical signals to be inputted via the second and third ports P2, P3 and outputs them. Two optical fiber cables 4, 5 have chirp gratings, reflect and output the optical signals to be outputted from the second and third ports P2, P3 of the polarization separator and synthesizer 3. A controller 114 controls the polarization controller 1 on the basis of the sum or the difference of detection signals indicating size of waveform distortion of the respective optical signals to be detected by optical signal monitors 111, 112. COPYRIGHT: (C)2004,JPO
    • 要解决的问题:与常规技术相比,可以确定地和高速地控制偏振控制器等。 解决方案:偏振控制器1控制光信号的偏振状态,使得要输入的光信号的偏振轴实际上与光传输线的光轴重合。 偏振分离器和合成器3将光信号与来自偏振控制器1输出的光信号分离成具有两个相互正交交叉的偏振分量的光信号,并通过第一端口P1输入,经由第二和第三端口P2, P3,另一方面,复用要经由第二和第三端口P2,P3输入的两个光信号并将其输出。 两个光纤电缆4,5具有啁啾光栅,反射并输出从偏振分离器和合成器3的第二和第三端口P2,P3输出的光信号。控制器114基于 表示由光信号监视器111,112检测的各光信号的波形失真的大小的检测信号的和或差。(C)2004,JPO