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

Clustered magneto-optical current sensor to eliminate the interference of a phase-to-phase magnetic field

Zhao Xiaojun, Liang Zhuohang, Li Yansong, and Liu Jun
Opt. Continuum 1(2) 197-214 (2022)

Optical current sensing mechanism under a non-uniform magnetic field

Yansong Li, Weiwei Zhang, Minhao Wang, and Jun Liu
Appl. Opt. 58(20) 5472-5478 (2019)

Optical current sensor immune to reflection phase shift based on graded-index magneto-optical glass

Meirong Wang, Jianlin Zhao, Sheng Liu, Fei Liu, Xun Wan, and Peng Zhang
Appl. Opt. 48(32) 6264-6270 (2009)

Diamagnetic tellurite glass and fiber based magneto-optical current transducer

Qiuling Chen, Qiuhua Ma, Hui Wang, and Qiuping Chen
Appl. Opt. 54(29) 8664-8669 (2015)

Enhancing the Faraday rotation of monolayer black phosphorus by the optical Tamm state at the photonic crystal interface

Daxing Dong, Youwen Liu, and Yangyang Fu
Appl. Opt. 59(30) 9607-9613 (2020)