In view of the growing Ethernet bandwidth requirements

this paper proposes a kind of 400 Gbit/s PAM4 CFP8 optical transceiver module.This paper first introduces the technical solutions and the main technical parameters in 400 Gbit/s standard.Then it describes the basic principle of PAM4 CFP8 optical transceiver module.The experiment results show good optical and electrical eye diagrams

which indicate that PAM4 CFP8 optical module is a good solution to 400 Gbit/s Ethernet transmission and may have broad application prospects in future high-speed optical communication system.