An Isotropic Electric-Field Sensing System Using Optical Probe

作     者：杨拥军 陈福深 孙豹 

作者机构：Key Lab of Broadband Optical Fiber Transmission and Communication Networks University of Electronic Science and Technology of China Chengdu 610054 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2007年第24卷第4期

页      面：965-967页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：MACH-ZEHNDER INTERFEROMETER MODULATOR SENSOR 

摘      要：We design an isotropic electric-field sensing system using an optical probe. The optical probe consists of three electric-field sensors based on a Mach-Zehnder interferometer with the structure of segmented electrodes, which are perpendicular to each other. The measured results show that the ±5 dB baseband can reach 3 GHz, the linear dynamics range is 70dB, and the minimum detectable electric field is lower than 90 dBμ V/m （the spectrum analyser resolution is 100 Hz）. The directional characteristics are almost isotropic within deviations of ±1.5 dB. Therefore this sensing system can be used in the electromagnetic compatibility measurements.