A novel optical fiber current sensor using polarization diversity and a Faraday rotation mirror cavity

Hongying Zhang; Yongkang Dong; Jesse Leeson; Liang Chen; Xiaoyi Bao

doi:10.1117/12.885371

17 May 2011 A novel optical fiber current sensor using polarization diversity and a Faraday rotation mirror cavity

Hongying Zhang, Yongkang Dong, Jesse Leeson, Liang Chen, Xiaoyi Bao

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.

Citation Download Citation

Hongying Zhang, Yongkang Dong, Jesse Leeson, Liang Chen, and 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); https://doi.org/10.1117/12.885371

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