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An Isotropic Electric-Field Sensing System Using Optical Probe |
| YANG Yong-Jun;CHEN Fu-Shen;SUN Bao |
| Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electronic Science and Technology of China, Chengdu 610054 |
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| Cite this article: |
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YANG Yong-Jun, CHEN Fu-Shen, SUN Bao 2007 Chin. Phys. Lett. 24 965-967 |
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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.
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| Keywords:
42.68.Wt
42.81.Pa
42.82.Bq
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Received: 10 August 2006
Published: 26 March 2007
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| PACS: |
42.68.Wt
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(Remote sensing; LIDAR and adaptive systems)
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42.81.Pa
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(Sensors, gyros)
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42.82.Bq
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(Design and performance testing of integrated-optical systems)
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