Abstract
A reciprocal fiber-optic reflection interferometer for remote measurement of electrical current through the Faraday effect is described. The effects of polarization cross coupling because of nonideal elements are eliminated with a low-coherence source. Nonreciprocal birefringence phase modulation is employed for detection of the Faraday phase shift. The theoretical predictions are confirmed by measurements with a piece of straight fiber as the sensing element in a 100-turn solenoid. Currents from 0 to 40 A have been measured with a linear response and a noise limit of .
© 1994 Optical Society of America
Full Article | PDF ArticleMore Like This
Hongying Zhang, Yongkang Dong, Jesse Leeson, Liang Chen, and Xiaoyi Bao
Appl. Opt. 50(6) 924-929 (2011)
César D. Perciante, Sofía Aparicio, Ricardo Illa, and José A. Ferrari
Appl. Opt. 54(18) 5708-5714 (2015)
Chunxi Zhang, Chuansheng Li, Xiaxiao Wang, Lijing Li, Jia Yu, and Xiujuan Feng
Appl. Opt. 51(18) 3977-3988 (2012)