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Proceedings Paper

Electro-optical measurement of highly intense electric field with high frequency
Author(s): Xiangjun Zeng; Haiqing Chen
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Paper Abstract

The transient electric field of highly intense electromagnetic pulse (EMP) will seriously damage the military and civil installations, so it is significantly important to measure such electric field of EMP with high frequency. This paper describes a fiber-optic sensor for measuring highly intense electric field with high frequency. The sensor consists of a probe of electrooptic (EO) crystal, optic fiber, polarizer, photodetector, processing circuits and single-chip microprocessor. According to Pockels effect, the polarized light will be modulated by the electric field to be measured when it penetrates the EO crystal. Then, its polarized direction will vary following the variation of electric field. The change of polarized direction is converted to the variation of light intensity by polarizer. In order to gain good performance, it is important to choose suitable crystal carefully. The interrelated optical axises of the components are adjusted on the basis of the theoretical analysis and calculations. A special temperature compensating method is used to decrease the temperature effect. At the meantime, the low circuit is used. The testing results show that the linearity is 0.2%, the error of the measurement is approximately 0.5% and the risetime is less than 4ns.

Paper Details

Date Published: 4 July 2000
PDF: 7 pages
Proc. SPIE 4082, Optical Sensing, Imaging, and Manipulation for Biological and Biomedical Applications, (4 July 2000); doi: 10.1117/12.390561
Show Author Affiliations
Xiangjun Zeng, Huazhong Univ. of Science and Technology (China)
Haiqing Chen, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 4082:
Optical Sensing, Imaging, and Manipulation for Biological and Biomedical Applications
Robert R. Alfano; Peng Pei Ho; Arthur E. T. Chiou, Editor(s)

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