Laser & Optoelectronics Progress, Volume. 47, Issue 10, 100602(2010)
Multi-Point Optical Fiber Sensing Technology for Methane Detection
The application of near-infrared tunable diode laser spectroscopy(TDLAS) was investigated experimentally on gas detection, and the application on methane detection in coal mines with fiber sensor was presented. Based on gas absorption characteristics in near-infrared optical bands, with wavelength modulation on narrow-linewidth distributed feed back(DFB) laser, using harmonic detection technology, eliminating the effect of light source fluctuation and fiber jitter, the performance of measurement sensitivity is improved. By using the space division multiplexing(SDM) technology, a multi-point optical fiber sensor system for measuring methane is proposed. This method can reduce system costs, and will be adapted for requirement in harsh environments such as coal mines and so on.
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Fan Shibin, Xu Hongchun, Xiang Xiong. Multi-Point Optical Fiber Sensing Technology for Methane Detection[J]. Laser & Optoelectronics Progress, 2010, 47(10): 100602
Category: Fiber Optics and Optical Communications
Received: Apr. 26, 2010
Accepted: --
Published Online: Sep. 21, 2010
The Author Email: Shibin Fan (sbfan@wtd.com.cn)