Abstract

To solve the issue of external magnetic fields interfering with magneto-optical glass current sensors (MOCS), this paper proposes a strip-like splicing structure. First, a mathematical model for integrating the magnetic field strength along the optical path is constructed, and the relationship between the gap size $a$, the interference source distance $d$, the angle of the interference source $\theta $, and the relative error $\varepsilon $ is analyzed. Then, an optical-electromagnetic COMSOL Multiphysics simulation model is constructed. The simulation results are in good agreement with the theoretical results. Finally, the strip-like splicing MOCS structure is optimized by combining two different MOCSs with a tilt angle of 45°. Thus, their output signals are summed and the adjacent interference phase signals nearly compensate mutually. This new structure facilitates real-world installation, avoiding the angle being limited to a fixed value, and meeting a 0.2 accuracy of the anti-electromagnetic interference properties.

© 2020 Optical Society of America

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