公开(公告)号：WO2018045454A1

公开(公告)日：2018-03-15

申请号：PCT/CA2017/050746

申请日：2017-06-19

Applicant: HUAWEI TECHNOLOGIES CANADA CO., LTD.

Inventor： CHUNG, Ray ,  LU, Zeqin ,  JAYATILLEKA, Hasitha ,  AL TAHA, Mohammed Wadah ,  SHEKHAR, Sudip ,  MIRABBASI, Shahriar ,  CHROSTOWSKI, Lukas

IPC: H04B10/07 ,  G02B6/12

CPC classification number: G02F1/0123 ,  G02F1/3132 ,  G02F1/3136 ,  G02F1/3137 ,  G02F2201/58

Abstract: A method and apparatus for monitoring and feedback control of a photonic switch such as 2x2 Mach-Zehnder Interferometer switch. Optical signals at an input and an output of the switch are monitored via optical taps. A sinusoidal time-varying phase shift is applied to one of the monitoring signals. An optical combiner then combines the monitoring signals. A photodetector monitors output of the optical combiner to provide a feedback signal. The amplitude of the feedback signal due to the time-varying phase shift increases with the amount of input signal present in the output signal. When the input signal is to be routed to the output (e.g. for a bar state), a controller manipulates the switch to maximize feedback signal amplitude. When the input signal is to be routed to a different output (e.g. for a cross state), the controller manipulates the switch to minimize feedback signal amplitude.

Abstract translation: 用于监视和反馈控制诸如2×2 Mach-Zehnder干涉仪开关的光子开关的方法和设备。 光开关的输入端和输出端的光信号通过光分接头监控。 正弦时变相移被施加到其中一个监测信号。 一个光学组合器然后组合监视信号。 光电探测器监视光组合器的输出以提供反馈信号。 由于随时间变化的相移引起的反馈信号的幅度随着输出信号中存在的输入信号的量而增加。 当输入信号被路由到输出端（例如，用于条状态）时，控制器操纵开关以最大化反馈信号幅度。 当输入信号被路由到不同的输出时（例如，对于交叉状态），控制器操纵开关以最小化反馈信号幅度。