Abstract

The effect of the inhomogeneous magnetic field on the Faraday rotation angle and output light intensity was analyzed using finite element simulation, at different distances between the conductor and the magneto-optical glass. The results show that under an inhomogeneous magnetic field, the magnetic birefringence effect due to the Cotton–Mouton effect decreases the output light intensity of the straight-through optical path. The Faraday rotation angle is non-linearly inversely proportional to the distance. Based on these results, which were verified by the theoretical model, a reasonable geometric arrangement of the sensing component of a straight-through optical current sensor is proposed.

© 2019 Optical Society of America

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