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Proceedings Paper

A fiber-optic methane gas sensor system with improved accuracy using absorption-spectrum matched comb filter
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Paper Abstract

A fiber-optic methane gas sensor system is proposed and demonstrated with accurate gas concentration measurement with a sensitivity of ~410ppm. We employ the polarization-maintaining photonic crystal fiber (PM-PCF) based Sagnac loop filter to slice the spectrum of broadband light source so as to precisely match multiple absorption lines of the methane gas. Meanwhile, a compact gas cell with multiple reflections is designed to enhance the interaction between methane gas and the light beam. The proposed gas sensor is verified as low cost, temperature-insensitive, and high sensitivity.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842165 (7 November 2012); doi: 10.1117/12.970614
Show Author Affiliations
Duan Liu, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Ming Tang, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Zhiyong Zhao, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Songnian Fu, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Deming Liu, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
P. Shum, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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