Photonic analog-to-digital conversion with equivalent analog prefiltering by shaping sampling pulses

被引：32
|
作者：
Su, Feiran [1 ]
Wu, Guiling [1 ]
Chen, Jianping [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
来源：
OPTICS LETTERS | 2016年 / 41卷 / 12期
基金：
美国国家科学基金会;
关键词：
CONVERTERS; TIME;
D O I：
10.1364/OL.41.002779
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a photonic scheme to digitize RF signals with a programmable equivalent analog prefilter, where the filter impulse response is directly proportional to the time-reversed temporal shape of the sampling pulse and hence can be adjusted by shaping sampling pulses. The model of the proposed scheme is presented to prove its principle and derive its operation conditions. A four-channel scheme with program-controlled pre-filters is demonstrated experimentally, where bandpass filters with the phase shifts of 0 degrees, 90 degrees, 180 degrees, and 270 degrees are synthesized, respectively, by changing temporal shape of the sampling pulses. The experimental results agree well with the theoretical analysis, indicating the validity of the proposed scheme. (C) 2016 Optical Society of America
引用
收藏
页码：2779 / 2782
页数：4
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