Optic fiber hydrogen sensor based on high-low reflectivity Bragg gratings and WO3-Pd-Pt multilayer films

Jixiang Dai; Minghong Yang; Zhi Li; Gaopeng Wang; Chujia Huang; Chongjie Qi; Yutang Dai; Xiaoyan Wen; Cheng Cheng; Huiyong Guo

doi:10.1117/12.2194098

28 September 2015 Optic fiber hydrogen sensor based on high-low reflectivity Bragg gratings and WO₃-Pd-Pt multilayer films

Jixiang Dai, Minghong Yang, Zhi Li, Gaopeng Wang, Chujia Huang, Chongjie Qi, Yutang Dai, Xiaoyan Wen, Cheng Cheng, Huiyong Guo

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96346J (2015) https://doi.org/10.1117/12.2194098
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

A novel optic fiber hydrogen sensor is proposed in this paper. Two Bragg gratings with different reflectivity were written in single mode fiber with phase mask method by 248 nm excimer laser. The end-face of singe mode fiber was deposited with WO₃-Pd-Pt multilayer films as sensing element. The peak intensity of low reflectivity FBG is employed for hydrogen characterization, while that of high reflectivity FBG is used as reference. The experimental results show the hydrogen sensor still has good repeatability when the optic intensity in the fiber is only 1/3 of its initial value. The hydrogen sensor has great potential in measurement of hydrogen concentration.

Citation Download Citation

Jixiang Dai, Minghong Yang, Zhi Li, Gaopeng Wang, Chujia Huang, Chongjie Qi, Yutang Dai, Xiaoyan Wen, Cheng Cheng, and Huiyong Guo "Optic fiber hydrogen sensor based on high-low reflectivity Bragg gratings and WO₃-Pd-Pt multilayer films", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346J (28 September 2015); https://doi.org/10.1117/12.2194098

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