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Proceedings Paper

Sensitivity enhancement of Faraday effect based heterodyning fiber laser magnetic field sensor with the assistance of CO2-laser treatment
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Paper Abstract

We have proposed a novel magnetic field sensor based on orthogonally-polarized dual-frequency fiber laser and Faraday effect. In this paper, we propose a method to enhance the sensitivity of such Faraday effect based heterodyning fiber laser magnetic field sensor by tuning the intra-cavity intrinsic linear birefringence. We demonstrate that the sensitivity to magnetic field intensity is inversely proportional to the linear birefringence. A CO2-laser treatment is therefore proposed to tune the intra-cavity linear birefringence. With CO2-laser treatment to lower the intra-cavity linear birefringence, the sensitivities of heterodyning fiber laser sensors to magnetic field can be enhanced.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915727 (2 June 2014); doi: 10.1117/12.2059439
Show Author Affiliations
Linghao Cheng, Jinan Univ. (China)
Jianlei Han, Jinan Univ. (China)
Long Jin, Jinan Univ. (China)
Zhenzhen Guo, Jinan Univ. (China)
Bai-Ou Guan, Jinan Univ. (China)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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