Monolithically Integrated Sub-63 fJ/b 8-Channel 256Gb/s Optical Transmitter with Autonomous Wavelength Locking in 45nm CMOS SOI

📋 论文概要

该论文提出了一种单片集成的8通道256Gb/s光发射机，采用45nm CMOS工艺，实现了低于63 fJ/b的能效。通过自主波长锁定技术解决了多通道波长稳定性问题，适用于数据中心和AI系统的高带宽低功耗互连。

💡 主要创新点

• 首次在45nm CMOS平台上实现单片集成的8通道光发射机，无需外部光源或混合集成，降低了封装寄生效应。
• 提出自主波长锁定机制，无需外部校准即可稳定多通道激光波长，提升系统可靠性。
• 实现sub-63 fJ/b的极低能耗，同时达到256Gb/s的总数据速率，为高能效光互连提供新方案。

🏷 关键词

📄 原文摘要

Optical links play a key role in many applications ranging from data centers to AI systems. Such links typically consist of a light source chip, a transmitter chip (which may be cointegrated with the light source), and a receiver chip. Photonic and electronic devices within optical transmitter/receiver systems are either monolithically integrated or hybrid integrated. While hybrid integration has the advantage of using a high performance dedicated photonic fabrication process and an advanced technology node for electronic integration, the packaging parasitic components could limit the system bandwidth and/or decrease the energy efficiency compared to the monolithic integration approach. In this work, we present an ultra-low power monolithically integrated 8-channel optical WDM transmitter that consists of an efficient on-chip modulator driver array, a compact capacitively tuned ring modulator array, and an on-chip autonomous electronic sequential

👥 作者与机构

Kaisarbek Omirzakhov, Firooz Aflatouni

University of Pennsylvania, Philadelphia, PA