Heterodyning fiber laser based magnetic field sensor using magnetostrictive composite material

Wei He; Linghao Cheng; Qiang Yuan; Yizhi Liang; Long Jin; Bai-Ou Guan

doi:10.1117/12.2184138

1 July 2015 Heterodyning fiber laser based magnetic field sensor using magnetostrictive composite material

Wei He, Linghao Cheng, Qiang Yuan, Yizhi Liang, Long Jin, Bai-Ou Guan

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96552D (2015) https://doi.org/10.1117/12.2184138
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

A novel fiber-optic magnetic field sensor is proposed by embedding a heterodyning fiber laser into an epoxy resin bonded magnetostrictive composite material with Terfenol-D particles doped. The magnetic field induced strain in the magnetostrictive composite material is converted to transversal stress by a structure which is applied to the fiber laser to produce beat note frequency changes for measurement. The response of the proposed sensor is measured, which shows a quite good directivity with a sensitivity of 10.5 Hz/μT to magnetic field and a large measurable range up to about 0.3 T.

Citation Download Citation

Wei He, Linghao Cheng, Qiang Yuan, Yizhi Liang, Long Jin, and Bai-Ou Guan "Heterodyning fiber laser based magnetic field sensor using magnetostrictive composite material", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96552D (1 July 2015); https://doi.org/10.1117/12.2184138

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