Fiber optic differential Mach-Zehnder interferometer for sensing electric current

TingYun Wang; Sheng-He Sun; Danhua Chang; Shengxuan Zheng

doi:10.1117/12.252156

24 September 1996 Fiber optic differential Mach-Zehnder interferometer for sensing electric current

TingYun Wang, Sheng-He Sun, Danhua Chang, Shengxuan Zheng

Proceedings Volume 2895, Fiber Optic Sensors V; (1996) https://doi.org/10.1117/12.252156
Event: Photonics China '96, 1996, Beijing, China

Abstract

A new hybrid current sensor is described in this paper. The sensor uses a conventional current transformer to sense the electric current flowing in the conductor at high potential and converts this signal to an optical phase change in a novel differentiating optic fiber Mach-Zehnder interferometer. The optical signal is then transmitted to ground potential for subsequent processing. By using the technique, a resolution of 0.5 A/(root)Hz and an accuracy of plus or minus 0.7% are obtained at the line frequency of 50 Hz and the dynamic range is 1.58 to approximately 380 A in our prototype architecture.

Citation Download Citation

TingYun Wang, Sheng-He Sun, Danhua Chang, and Shengxuan Zheng "Fiber optic differential Mach-Zehnder interferometer for sensing electric current", Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); https://doi.org/10.1117/12.252156

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