Real-time digital signal processing for live electro-optic imaging

被引：15
|
作者：
Sasagawa, Kiyotaka [1 ,2 ]
Kanno, Atsushi [1 ]
Tsuchiya, Masahiro [1 ]
机构：
[1] Natl Inst Informat & Commun Technol, Tokyo 1848795, Japan
[2] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300192, Japan
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 18期
关键词：
NEAR-FIELDS; SYSTEM; PROBE; ENHANCEMENT;
D O I：
10.1364/OE.17.015641
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present an imaging system that enables real-time magnitude and phase detection of modulated signals and its application to a Live Electro-optic Imaging (LEI) system, which realizes instantaneous visualization of RF electric fields. The real-time acquisition of magnitude and phase images of a modulated optical signal at 5 kHz is demonstrated by imaging with a Si-based high-speed CMOS image sensor and real-time signal processing with a digital signal processor. In the LEI system, RF electric fields are probed with light via an electro-optic crystal plate and downconverted to an intermediate frequency by parallel optical heterodyning, which can be detected with the image sensor. The artifacts caused by the optics and the image sensor characteristics are corrected by image processing. As examples, we demonstrate real-time visualization of electric fields from RF circuits. (C) 2009 Optical Society of America
引用
收藏
页码：15641 / 15651
页数：11
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