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Proceedings Paper

Hydrogen sensor based on side-polished fiber Bragg gratings coated with thin palladium film
Author(s): Hongliang Liu; Minghong Yang; Jixiang Dai; Kun Cao; Hansheng Liao; Pengcheng Zhang
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Paper Abstract

A hydrogen sensor based on side-polished fiber Bragg grating (FBG) coated with Pd thin film by magnetron sputtering is proposed. Hydrogen concentration is correlated with the shift of FBG central wavelength, since refractive index change in hydrogen sensitive Pd coating deposited on side-polished FBG affects the effective refractive index of FBG, and therefore Bragg wavelength is shifted. Experimental results demonstrate that FBG wavelength shifts to lower wavelength as the hydrogen concentration increases. The proposed optical fiber hydrogen sensor shows 15pm wavelength shift in 0.01% volume percentage of hydrogen concentration, and totally 246pm offset exists in pure hydrogen environment.

Paper Details

Date Published: 18 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77538O (18 May 2011); doi: 10.1117/12.884679
Show Author Affiliations
Hongliang Liu, Wuhan Univ. of Technology (China)
Minghong Yang, Wuhan Univ. of Technology (China)
Jixiang Dai, Wuhan Univ. of Technology (China)
Kun Cao, Wuhan Univ. of Technology (China)
Hansheng Liao, Wuhan Univ. of Technology (China)
Pengcheng Zhang, Wuhan Univ. of Technology (China)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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