High-resolution fiber methane sensor based on diode laser and its data processing

Yubin Wei; Tingting Zhang; Yanfang Li; Yanjie Zhao; Chang Wang; Tongyu Liu

doi:10.1117/12.900865

22 August 2011 High-resolution fiber methane sensor based on diode laser and its data processing

Yubin Wei, Tingting Zhang, Yanfang Li, Yanjie Zhao, Chang Wang, Tongyu Liu

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81923D (2011) https://doi.org/10.1117/12.900865
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Tunable diode laser absorption spectroscopy (TDLAS) based optical fiber methane sensing technology has a number of advantages compared with conventional electronic methane sensor device, such as high Precision, passive and intrinsically safe in explosive and hazardous environment as well as immune to electro-magnetic interference. In order to accurately measure the oxidation rate of coal mine ventilation air methane oxidizer system, and Meet requirements for accurate measurements to the oxidizer exhaust emissions, A Fiber optic methane monitor based on Distributed feedback tunable diode (DFB) laser of 1.65um central wavelength is demonstrated. We use a reflective chamber of only a 10cm effective optical path as sensing gas cell. By the data processing of fitting baseline method, we remove the effect of the baseline tilt of background Spectral. The system achieves 0 to 0.1% measure range and 5.8*10E-6 minimum detection sensitivity, and meets the requirements of high accuracy, real-time measure to the oxidizer exhaust emissions.

Citation Download Citation

Yubin Wei, Tingting Zhang, Yanfang Li, Yanjie Zhao, Chang Wang, and Tongyu Liu "High-resolution fiber methane sensor based on diode laser and its data processing", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81923D (22 August 2011); https://doi.org/10.1117/12.900865

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