Design of a PAM-4 VCSEL-Based Transceiver Front-End for Beyond-400G Short-Reach Optical Interconnects
Author(s): He, J (He, Jian); Lu, DL (Lu, Donglai); Xue, HY (Xue, Haiyun); Chen, SK (Chen, Sikai); Liu, H (Liu, Han); Li, LL (Li, Leliang); Li, GK (Li, Guike); Zhang, Z (Zhang, Zhao); Liu, J (Liu, Jian); Liu, LY (Liu, Liyuan); Wu, NJ (Wu, Nanjian); Yu, NM (Yu, Ningmei); Liu, FM (Liu, Fengman); Xiao, X (Xiao, Xi); Chen, Y (Chen, Yong); Qi, N (Qi, Nan)
Source: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS DOI: 10.1109/TCSI.2022.3179678 Early Access Date: JUN 2022
Abstract: This paper presents a hybrid-integrated optical transceiver front-end for beyond-400G short-reach optical links. A pair of the monolithic 8-channel laser drivers and the transimpedance amplifier (TIA) is developed in 180nm SiGe BiCMOS, incorporating arrayed Vertical-Cavity-Surface- Emitting Lasers and photo-detectors. The driver uses a 2nd-order continuous-time linear equalizer (CTLE) to compensate for the channel loss with a nonlinear frequency response. Both the inductive peaking and RC-degeneration are embedded at the output stage to extend the optical modulation bandwidth (BW). The series-peaking and multi-stage distributed CTLE are combined in a resistive feedback TIA topology for improved BW and linearity. Measurement results show up to 100-Gb/s PAM-4 electrical eyes of the driver and TIA. The optical transmitter front-end operates 56 Gb/s, 4.1-dB extinction ratio, and 6.6-pJ/bit power efficiency, while the optical receiver front-end achieves 56-Gb/s, 10-6 bit error rate, and 5.9-pJ/bit power efficiency.
Accession Number: WOS:000826433600001
Author Identifiers:
Author Web of Science ResearcherID ORCID Number
xue, haiyun 0000-0001-5007-3089
ISSN: 1549-8328
eISSN: 1558-0806
