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 ±5dB baseband can reach 3GHz, the linear dynamics range is 70dB, and the minimum detectable electric field is lower than 90dBμV/m (the spectrum analyser resolution is 100Hz). The directional characteristics are almost isotropic within deviations of ±1.5dB. Therefore this sensing system can be used in the electromagnetic compatibility measurements.
Abstract：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 ±5dB baseband can reach 3GHz, the linear dynamics range is 70dB, and the minimum detectable electric field is lower than 90dBμV/m (the spectrum analyser resolution is 100Hz). The directional characteristics are almost isotropic within deviations of ±1.5dB. Therefore this sensing system can be used in the electromagnetic compatibility measurements.
(Design and performance testing of integrated-optical systems)
引用本文:
YANG Yong-Jun;CHEN Fu-Shen;SUN Bao. An Isotropic Electric-Field Sensing System Using Optical Probe[J]. 中国物理快报, 2007, 24(4): 965-967.
YANG Yong-Jun, CHEN Fu-Shen, SUN Bao. An Isotropic Electric-Field Sensing System Using Optical Probe. Chin. Phys. Lett., 2007, 24(4): 965-967.
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2007, Vol. 24 
