Search International and National Patent Collections
|1. (WO2018161405) DML-BASED HIGH-SPEED PAM4 OPTICAL TRANSCEIVER MODULE|
|Applicants:||WUHAN TELECOMMUNICATION DEVICES CO., LTD.
|Title:||DML-BASED HIGH-SPEED PAM4 OPTICAL TRANSCEIVER MODULE|
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.