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    • 10. 发明申请
    • SYSTEM FOR POLARIZATION MODE DISPERSION COMPENSATION
    • 极化模式分散补偿系统
    • WO2003058856A1
    • 2003-07-17
    • PCT/US2002/039034
    • 2002-12-05
    • 3M INNOVATIVE PROPERTIES COMPANY
    • KOCH, Barry, J.SMITH, Terry, L.DEBAUN, Barbara, A.
    • H04B10/18
    • G02B6/278G02B6/105G02B6/2932G02B6/29394H04B10/2569
    • An adaptive polarization mode dispersion compensator (102) including a polarization controller (110) and a differential polarization delay unit (130). The polarization controller converts incoming light (112) of an arbitrary polarization to a controller output signal having a desired state of polarization. The differential polarization delay unit is optically coupled to receive the controller output signal from the polarization controller. The differential polarization delay unit includes a polarization beam splitter element (125) and a first (132) and a second (132) birefringent optical waveguide. First (134) and second (138) chirped gratings are formed in the first and second birefringent optical waveguides. At least one tuning mechanism (180) is coupled to at least one of the gratings, wherein the tuning mechanism variably adjusts one of the reference reflection points (139) with respect to the other reference reflection point (135). A combiner element (125) recombines the two reflected orthogonal polarization signals into a delay line output (120). A signal quality analyzer (160) evaluates the quality of the differential polarization delay unit output signal and provides a control signal (164,166) to the polarization controller and the differential polarization delay unit.
    • 包括偏振控制器110和差分偏振延迟单元130的自适应偏振模色散补偿器102.偏振控制器将任意偏振的入射光112转换为具有期望偏振状态的控制器输出信号。 差分偏振延迟单元被光学耦合以从偏振控制器接收控制器输出信号。 差分偏振延迟单元包括偏振分束器元件125和第一132和第二132双折射光波导。 在第一和第二双折射光波导中形成第一134和第二138个啁啾光栅。 至少一个调谐机构180耦合到至少一个光栅,其中调谐机构相对于另一个参考反射点135可变地调整参考反射点139中的一个。组合器元件125将两个反射的正交偏振信号 信号质量分析器160评估差分极化延迟单元输出信号的质量,并向偏振控制器和差分极化延迟单元提供控制信号164,166。