Abstract

The effects of magnetic crosstalk on a fiber optic current sensor are studied using the distributed parameter model. A new method to enhance the immunity to magnetic crosstalk is proposed. The experimental results show that magnetic crosstalk changes periodically with the azimuth angle and decreases as the distance between the conductors increases. When the sensing coil is placed at the optimal azimuth angle, the ratio error from magnetic crosstalk decreases from 0.32% to 0.02%, demonstrating the effectiveness of the proposed method.

© 2015 Optical Society of America

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