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Proceedings Paper

A novel optical fiber current sensor using polarization diversity and a Faraday rotation mirror cavity
Author(s): Hongying Zhang; Yongkang Dong; Jesse Leeson; Liang Chen; Xiaoyi Bao
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Paper Abstract

A novel high sensitivity optical fiber current sensor (OFCS) based on polarization diversity (PD) and a Faraday rotation mirror cavity (FRMC) is proposed and demonstrated. The PD detection doubles the sensitivity and effectively removes the DC background compared with the single-channel detection, while the FRMC suppresses the reciprocal birefringence and amplifies non-reciprocal phase modulation caused by the current-induced magnetic field. Compared with the results obtained by single-channel detection, a signal gain of 6dB and a signal-to-noise ratio improvement of over 30dB have been achieved in the new scheme. A linear response is obtained for current amplitude as low as mA.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531J (17 May 2011); doi: 10.1117/12.885371
Show Author Affiliations
Hongying Zhang, Univ. of Ottawa (Canada)
Yongkang Dong, Univ. of Ottawa (Canada)
Jesse Leeson, Univ. of Ottawa (Canada)
Liang Chen, Univ. of Ottawa (Canada)
Xiaoyi Bao, Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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