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Proceedings Paper

Fiber optic differential Mach-Zehnder interferometer for sensing electric current
Author(s): TingYun Wang; Sheng-He Sun; Danhua Chang; Shengxuan Zheng
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Paper 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.

Paper Details

Date Published: 24 September 1996
PDF: 7 pages
Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); doi: 10.1117/12.252156
Show Author Affiliations
TingYun Wang, Harbin Institute of Technology (China)
Sheng-He Sun, Harbin Institute of Technology (China)
Danhua Chang, Yanshan Univ. (China)
Shengxuan Zheng, Yanshan Univ. (China)

Published in SPIE Proceedings Vol. 2895:
Fiber Optic Sensors V
Kim D. Bennett; Byoung Yoon Kim; Yanbiao Liao, Editor(s)

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