JSSC 2020第9期RF & Wireless250nm InP DHBT

A Beyond-1-Tbs Coherent Optical Transmitter Front-End Based on 110-GHz-Bandwidth

基于110GHz带宽的超越1Tbs相干光发射前端

110GHz带宽,1.5Vppd线性差分输出,<3%THD,168GBaud PDM-16QAM

相干光通信光发射前端模拟复用器InP DHBT16QAM调制

▸2:1模拟复用器与光调制驱动器单片集成

▸采用250nm InP DHBT工艺实现460GHz fT和480GHz fmax

▸紧凑集成模块实现80GHz以上电光带宽

Abstract

This article presents an optical transmitter front-end based on 2:1 analog multiplexer (AMUX) for beyond-1-Tb/s/carrier coherent optical communications systems. An AMUX is monolithically integrated with an optical modu- lator driver to realize an AMUX-Driver IC that can directly drive an optical modulator . The AMUX-Driver IC fabricated by using our in-house 250-nm InP double heterojunction bipo- lar transistors (DHBTs), whic h have a peak cutoff frequency ( f T) and maximum oscillation frequenc