公开(公告)号：US10291346B2

公开(公告)日：2019-05-14

申请号：US15465443

申请日：2017-03-21

Applicant: Finisar Corporation

Inventor： Leo Yu-Yu Lin ,  Huade Shu ,  Huiping Li ,  Li Zhang ,  Shanshan Zeng ,  Guangsheng Li

IPC: H04J14/00 ,  H04J14/02 ,  H04B10/25 ,  H04B10/50 ,  H04B10/60

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.

公开(公告)号：US10374742B2

公开(公告)日：2019-08-06

申请号：US15433904

申请日：2017-02-15

Applicant: Finisar Corporation

Inventor： Leo Yu-Yu Lin ,  Huiping Li ,  Youbin Zheng ,  Huade Shu ,  Li Zhang

IPC: H04B10/40 ,  H04J14/02

Abstract: A module, system and method adjusts a tunable filter to have an adjustable frequency response based on one of an outbound optical signal on a transmit channel and an inbound optical signal on a receive channel. The tunable filter is in an optical path of the outbound optical signal and in an optical path of the inbound optical signal. The transmit and the receive channels are configured as part of a channel plan of a bidirectional (bi-di) dense wavelength division multiplexing (DWDM) system.