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28 September 2015 Optic fiber hydrogen sensor based on high-low reflectivity Bragg gratings and WO3-Pd-Pt multilayer films
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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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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