⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种基于载流子注入模式马赫-曾德尔调制器（PIN-MZM）的O波段直接驱动相干光发射机，采用45nm CMOS-SOI工艺实现了0.4mm的紧凑单片集成。通过多级线性驱动器、并联峰化、无源均衡和发送前馈均衡（TX-FIR），该发射机在106Gb/s PAM-4强度调制直接检测（IMDD）和212Gb/s QAM16相干信号传输中分别达到0.91pJ/b的能效，并相比传统反向偏置行波MZM降低了2.76倍的激光器功耗和5倍的面积。
Abstract This work presents an O-band coherent direct-drive optical transmitter (OTX) in 45nm CMOS-SOI using a compact 0.4mm monolithically integrated forward-biased PIN-MZM. A multistage linear driver with shunt peaking, passive equalization and TX-FIR enables 106Gb/s PAM-4 IMDD and 212Gb/s QAM16 coherent signaling. The OTX achieves 0.91pJ/b electrical power efficiency with a 2.76× lower laser power and 5× area reduction versus a conventional reverse-biased TW-MZM fabricated on the same die. To continue the bandwidth density scaling of short-reach intra-data-center optical links, recently there has been a significant focus on coherent signaling [1,2], such as QPSK and QAM-16, compared to the conventional intensity modulation direct-detection (IMDD) approaches such as on-off keying and PAM-4. With the evolution of co-packaged optics (CPO), emerging direct-drive optical transceivers [3] prove to have better power efficiency,
Antroy Roy Chowdhury1, Wahid Rahman1, Ahmed ElShater2, Tamer Ali2, Vladimir Stojanovic1,3
University of California, Berkeley, CA, 2MediaTek, Irvine, CA, 3Ayar Labs, San Jose, CA