Comparison of side-polished fiber Bragg grating hydrogen sensors sputtered with Pd/Ag and Pd/Y composite films

Jixiang Dai; Minghong Yang; Zhi Yang; Xun Yu; Kun Cao; Junsheng Liao; Pengcheng Zhang

doi:10.1117/12.970177

7 November 2012 Comparison of side-polished fiber Bragg grating hydrogen sensors sputtered with Pd/Ag and Pd/Y composite films

Jixiang Dai, Minghong Yang, Zhi Yang, Xun Yu, Kun Cao, Junsheng Liao, Pengcheng Zhang

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842162 (2012) https://doi.org/10.1117/12.970177
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

Pd/Ag and Pd/Y composite films were deposited on the side-face of side-polished fiber Bragg grating (FBG) as sensing elements with magnetron sputtering process. Compared to standard FBG coated with same hydrogen sensitive film, side-polished FBG significantly increase the sensor's sensitivity. When hydrogen concentration is 4% in volume percentage, the wavelength shifts of side-polished FBG sputtered with Pd/Ag and Pd/Y are 18 and 23 pm respectively. The experimental results show the hydrogen sensor coated with Pd/Y composite film has higher sensitivity and quicker response rate, and the sensor's hydrogen response is reversible. The side-polished FBG hydrogen sensor with Pd-based composite films has great potential in measurement and monitor of hydrogen concentration.

Citation Download Citation

Jixiang Dai, Minghong Yang, Zhi Yang, Xun Yu, Kun Cao, Junsheng Liao, and Pengcheng Zhang "Comparison of side-polished fiber Bragg grating hydrogen sensors sputtered with Pd/Ag and Pd/Y composite films", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842162 (7 November 2012); https://doi.org/10.1117/12.970177

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