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2 June 2014 Sensitivity enhancement of Faraday effect based heterodyning fiber laser magnetic field sensor with the assistance of CO2-laser treatment
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915727 (2014) https://doi.org/10.1117/12.2059439
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
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.
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Linghao Cheng, Jianlei Han, Long Jin, Zhenzhen Guo, and Bai-Ou Guan "Sensitivity enhancement of Faraday effect based heterodyning fiber laser magnetic field sensor with the assistance of CO2-laser treatment", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915727 (2 June 2014); https://doi.org/10.1117/12.2059439
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