Single crystal-based optical current sensor with electrically adjustable sensitivity

Changsheng Li

doi:10.1117/12.907005

22 November 2011 Single crystal-based optical current sensor with electrically adjustable sensitivity

Changsheng Li

Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 819904 (2011) https://doi.org/10.1117/12.907005
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

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%.

Citation Download Citation

Changsheng Li "Single crystal-based optical current sensor with electrically adjustable sensitivity", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 819904 (22 November 2011); https://doi.org/10.1117/12.907005

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