4×25 Gb/s Transceiver With Optical Front-end for 100 GbE System in 65 nm CMOS Technology Ping-Chuan Chiang , Student Member , IEEE, Jhih-Y u Jiang, Hao-Wei Hung, Chin-Y

Abstract

This paper presents a fully-integrated chipset for 4×25 Gb/s transceiver gearbox al ong with laser driver and photo detector front-ends. The transce iver provides 10:4 multiplexing and 4:10 demultiplexing convers ion, with built-in clock genera- tion, equalization, and amplific ation. The optical front-ends are realized as 4-element arrays, presenting remarkable performance with commercial vertical-cavity surface-emitting lasers and pho- todiodes. Feedforward equalizers and continuous-time linear equalizers are employed to compe nsate for loss and distortion in both electrical and optical domains. Fabricated in 65 nm CMOS technology, these chips can be lumped together as a compact module with performance exceeding typical 100 GbE standards.