Photonic subsampling analog-to-digital conversion of microwave signals at 40-GHz with higher than 7-ENOB resolution
Photonic subsampling analog-to-digital conversion of microwave signals at 40-GHz with higher than 7-ENOB resolution
复制标题
DOI：
10.1364/oe.16.016509
复制
发表时间：
2008-10-13
期刊：
影响因子：
3.8
通讯作者：
Kartner, Franz X.
中科院分区：
文献类型：
--
作者：
Kim, Jungwon;Park, Matthew J.;Kartner, Franz X.
模拟信号到数字信号的转换是现代信号处理系统中最重要的功能之一。随着信号频率增加到10 GHz以上，电子时钟的时序抖动（目前限制在100 fs左右）会影响模数转换器（ADC）的可实现分辨率。由于其超低的定时抖动，使用被动锁模激光器的光脉冲序列被认为是一种有前途的电子信号采样方式。本文基于亚10 fs抖动光学采样脉冲串，展示了一种光子亚采样ADC，可对40 GHz载波频率的窄带微波信号进行下变频和数字化，有效位数（ENOB）分辨率高于7。(c)2008年美国光学学会
Conversion of analog signals into digital signals is one of the most important functionalities in modern signal processing systems. As the signal frequency increases beyond 10 GHz, the timing jitter from electronic clocks, currently limited at similar to 100 fs, compromises the achievable resolution of analog-to-digital converters (ADCs). Owing to their ultralow timing jitter, the use of optical pulse trains from passively mode-locked lasers has been considered to be a promising way for sampling electronic signals. In this paper, based on sub-10 fs jitter optical sampling pulse trains, we demonstrate a photonic subsampling ADC that downconverts and digitizes a narrowband microwave signal at 40 GHz carrier frequency with higher than 7 effective-number-of-bit (ENOB) resolution. (c) 2008 Optical Society of America