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Proceedings Paper

Single crystal-based optical current sensor with electrically adjustable sensitivity
Author(s): Changsheng Li
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Paper Abstract

An optical current sensor with adjustable sensitivity is proposed and investigated in experiment. A single bismuth germanate crystal is used as both current-sensing element and electro-optic modulator. When a rectangular pulse modulating voltage is applied to the crystal, the current-sensing signal can be obtained from the peak-to-peak intensity of output light. Both the measurement sensitivity and its temperature stability of the proposed sensor can be controlled by the modulating voltage, additionally its linear and monotone varying measurement range is larger than that of conventional optical current sensor. Direct current of ±(0.1~10)A was measured with electro-optically adjustable sensitivity, and maximum measurement uncertainty was less than 1.2%.

Paper Details

Date Published: 22 November 2011
PDF: 8 pages
Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 819904 (22 November 2011); doi: 10.1117/12.907005
Show Author Affiliations
Changsheng Li, Beihang Univ. (China)


Published in SPIE Proceedings Vol. 8199:
2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; YanBiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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