摘要
模数转换器(Analog-to-digital converter,ADC)是将自然界中各种模拟信号转换为数字信号的桥梁,其性能优劣直接决定了后续数字信号处理的能力。随着电子信息技术的发展和数字化的推广,主流半导体材料电子ADC受到载流子迁移率的限制,难以满足宽带信号高速、高精度模数转换的需求。光子技术天然具备超高速、大带宽等优良特性,利用光子学手段来提升电子ADC性能是目前突破电子瓶颈最具潜力的技术方案之一。文章介绍了光学ADC的基本原理和实现方案,并重点分析了最近十年来光学时间拉伸ADC和光采样ADC的国内外研究进展以及各自的技术特点,此外还概述了光量化技术的应用前景,展望了未来光学ADC及其关键技术的发展趋势。
An analog-to-digital converter(ADC)is a bridge that converts analog signals into digital ones,whose performance determines the subsequent digital signal processing capability.With the development of electronic information technology and the popularization of digitization,the mainstream electronic ADCs are limited by carrier mobility,which is difficult to meet the requirements of high-speed and high-resolution analog-to-digital conversion of broadband signals.With excellent characteristics of ultra-high speed and large bandwidth,photonics technology is recognized as one of the most potential technology to break through electronic bottleneck in ADC technology.In this paper,the basic principle and implementation scheme of the photonic ADCs are introduced.Especially,the research progress of photonic time-stretch ADC and photonic sampling ADC in the last decade and their respective technical characteristics are analyzed.In addition,an overview of photonic quantization technology is presented,together with the development trend of photonic ADC and its key technologies in the future.
作者
李政凯
张旨遥
李和平
刘永
LI Zhengkai;ZHANG Zhiyao;LI Heping;LIU Yong(State Key Laboratory of Electronic Thin Films and Integrated Devices,School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610000,China)
出处
《空间电子技术》
2020年第4期117-125,共9页
Space Electronic Technology
基金
科技部重点研发计划(编号:2019YFB2203800)
国家自然科学基金(编号:61927821)。
关键词
模数转换器
时间拉伸
光采样
Analog-to-digital converter(ADC)
Time stretch
Photonic sampling
