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1. (WO2018161405) DML-BASED HIGH-SPEED PAM4 OPTICAL TRANSCEIVER MODULE

Pub. No.:    WO/2018/161405    International Application No.:    PCT/CN2017/080288
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Thu Apr 13 01:59:59 CEST 2017
IPC: H04B 10/40
Applicants: WUHAN TELECOMMUNICATION DEVICES CO., LTD.
武汉电信器件有限公司
Inventors: XU, Hongchun
徐红春
CHEN, Tuquan
陈土泉
LIU, Chenggang
刘成刚
SU, Zhicheng
宿志成
ZHANG, Wuping
张武平
CHEN, Ben
陈奔
Title: DML-BASED HIGH-SPEED PAM4 OPTICAL TRANSCEIVER MODULE
Abstract:
The present invention relates to the technical field of optical modules, and provides a DML-based high-speed PAM4 optical transceiver module. The optical transceiver module comprises an interface unit, a PAM4 standard conversion unit, a DML optical transmitting unit, and an optical receiving unit. The interface unit is connected to the PAM4 standard conversion unit for transferring an NRZ electric signal of a first bit rate transmitted by means of the interface unit to the PAM4 standard conversion unit. The PAM4 standard conversion unit is also connected to the DML optical transmitting unit and the optical receiving unit, and is also used for receiving an electric signal in a second PAM4 modulation code format generated by the optical receiving unit. In embodiments of the present invention, a module in a PAM4 modulation mode is used, a 50G bit signal transmission rate can be reached by using only a 25G transmitting component and a 25G receiving component. Compared with a module in an NRZ modulation mode at the same rate, the module of the PAM4 modulation mode has advantages of simple structure, small volume, and low costs.