17 May 2011 A novel optical fiber current sensor using polarization diversity and a Faraday rotation mirror cavity
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531J (2011) https://doi.org/10.1117/12.885371
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
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.
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Hongying Zhang, Hongying Zhang, Yongkang Dong, Yongkang Dong, Jesse Leeson, Jesse Leeson, Liang Chen, Liang Chen, Xiaoyi Bao, Xiaoyi Bao, } "A novel optical fiber current sensor using polarization diversity and a Faraday rotation mirror cavity", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531J (17 May 2011); doi: 10.1117/12.885371; https://doi.org/10.1117/12.885371
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