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Proceedings Paper

Beat frequency dependence of the sensitivity for Faraday-rotation based heterodyning fiber laser magnetic field sensor
Author(s): Nengpeng Hu; Linghao Cheng; Li Yu; Yizhi Liang; Hao Liang; Bai-Ou Guan
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Paper Abstract

The beat frequency dependence of the sensitivity for a Faraday-rotation based heterodyning fiber laser magnetic field sensor is studied, which shows that lower beat frequency results in higher sensitivity. By lowering the beat frequency to 2 MHz, the maximum sensitivity of about 43 Hz/μT to magnetic field has been achieved for a heterodyning fiber laser inscribed on an Erbium doped fiber. It also shows that the beat frequency is dependent on the polarization of the 980 nm pump. Therefore, dynamical tuning of the sensitivity optically has also been demonstrated by tuning the polarization of the 980 nm pump.

Paper Details

Date Published: 1 July 2015
PDF: 4 pages
Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96552X (1 July 2015); doi: 10.1117/12.2184222
Show Author Affiliations
Nengpeng Hu, Jinan Univ. (China)
Linghao Cheng, Jinan Univ. (China)
Li Yu, Jinan Univ. (China)
Yizhi Liang, Jinan Univ. (China)
Hao Liang, Jinan Univ. (China)
Bai-Ou Guan, Jinan Univ. (China)


Published in SPIE Proceedings Vol. 9655:
Fifth Asia-Pacific Optical Sensors Conference
Byoungho Lee; Sang-Bae Lee; Yunjiang Rao, Editor(s)

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