Phase-locking technique for stabilizing birefringent Sagnac interferometer-based current sensors

Xiaojun Fang; George Z. Wang; Anbo Wang; Richard O. Claus

doi:10.1117/12.229230

3 January 1996 Phase-locking technique for stabilizing birefringent Sagnac interferometer-based current sensors

Xiaojun Fang, George Z. Wang, Anbo Wang, Richard O. Claus

Proceedings Volume 2594, Self-Calibrated Intelligent Optical Sensors and Systems; (1996) https://doi.org/10.1117/12.229230
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

Phase fading, intensity noise and zero sensitivity at small-signal are the three limitations of a Sagnac interferometer-based fiber optic current sensor. In this paper, a birefringent Sagnac interferometer is designed to maximize the small signal sensitivity, balance the intensity noise, and compensate the polarization coupling-induced sensitivity degradation in a birefringent Sagnac interferometer. By locking the birefringence of the sensing fiber to certain values, the spun fiber-based intrinsic fiber optic current sensor can achieve almost the same performance as an ideal sensor with zero birefringence.

Citation Download Citation

Xiaojun Fang, George Z. Wang, Anbo Wang, and Richard O. Claus "Phase-locking technique for stabilizing birefringent Sagnac interferometer-based current sensors", Proc. SPIE 2594, Self-Calibrated Intelligent Optical Sensors and Systems, (3 January 1996); https://doi.org/10.1117/12.229230

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