Magneto-optic sensor based on electrogyration compensation and single-quartz crystal

Changsheng Li; He Cui; Xuan Zhang

doi:10.1117/12.2247756

14 November 2016 Magneto-optic sensor based on electrogyration compensation and single-quartz crystal

Changsheng Li, He Cui, Xuan Zhang

Proceedings Volume 10025, Advanced Sensor Systems and Applications VII; 100250Y (2016) https://doi.org/10.1117/12.2247756
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

Magnetooptic sensor based on electrogyration compensation is proposed and experimentally demonstrated by using single quartz crystal. The sensing unit is composed of single quartz crystal and two polarizers. Quartz crystal exhibits magneto-optic, electro-optic and electrogyration effects, thus magneto-optic Faraday rotation angle can be compensated by the electrogyration angle induced by the compensating voltage applied to the crystal. The compensating voltage is sensitive to both the deviation angle between light beam and principal crystalline axis, and the azimuth angle of polarizer. The 50Hz ac magnetic flux density within 267Gs has been measured, the compensating voltage is 0.72V/Gs for a single quartz crystal with a length of 23mm. The proposed sensor has potential application to closed-loop measurement of magnetic field.

Citation Download Citation

Changsheng Li, He Cui, and Xuan Zhang "Magneto-optic sensor based on electrogyration compensation and single-quartz crystal", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100250Y (14 November 2016); https://doi.org/10.1117/12.2247756

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