公开(公告)号：WO2017165561A1

公开(公告)日：2017-09-28

申请号：PCT/US2017/023658

申请日：2017-03-22

Applicant: FINISAR CORPORATION

Inventor： LIN, Leo, Yu-yu ,  SHU, Huade ,  LI, Huiping ,  ZHANG, Li ,  ZENG, Shanshan ,  LI, Guangsheng

IPC: H04J14/02

Abstract: In an example, a communication module includes an optical transmitter, an optical receiver, and a periodical filter. The optical transmitter is configured to emit an outbound optical signal. The optical receiver is configured to receive an inbound optical signal. A first frequency of the outbound optical signal is offset from a second frequency of the inbound optical signal by an amount less than a channel spacing of a multiplexer/demultiplexer implemented in an optical communication system that includes the communication module. The periodical filter is positioned in optical paths of both the outbound optical signal and the inbound optical signal and has a transmission spectrum with periodic transmission peaks and troughs. The first frequency of the outbound optical signal may be aligned to one of the transmission peaks and the second frequency of the inbound optical signal may be aligned to one of the transmission troughs, or vice versa.

Abstract translation: 在一个示例中，通信模块包括光发射器，光接收器和周期性滤波器。 光发射器被配置为发射出站光信号。 光接收机被配置为接收入站光信号。 出站光信号的第一频率从入站光信号的第二频率偏移的量小于在包括通信模块的光通信系统中实现的复用器/解复用器的信道间隔。 周期性滤波器位于出站光信号和入站光信号的光路中，并且具有带周期性传输峰值和低谷的传输频谱。 出站光信号的第一频率可以与传输峰值中的一个对齐，并且入站光信号的第二频率可以与传输谷中的一个对齐，反之亦然。