Abstract：All-fiber methane detection system based on the spectrum absorption properties of methane using a hollow-core photonic bandgap fiber (HC-PBGF) as special gas cell was demonstrated. The detection wavelength of methane was chosen on the basis of HITRAN2012 and HAWKS; In order to accelerate methane gas diffusion, pressure difference between inlet of HC-PBGF and outlet of HC-PBGF was formed with air pump. The optical path can be extended twice by using mirrors. The results indicated that the time is 190 seconds of the gas diffusion, system value fluctuation is 0.012% in half-hour and average repetition rate is 99.63%. Finally, making up different concentration methane gases, the results indicated that methane concentration has a good linear relationship with relative strength of absorption and the linearity is 99.92%. The detection system is response speed and portable on account of the hollow-core of HC-PBGF to detect methane and make online detection more convenient.
王志芳,王书涛,王贵川,车先阁. 空芯光子晶体带隙光纤用于甲烷检测的研究[J]. 计量学报, 2019, 40(6): 1135-1139.
WANG Zhi-fang,WANG Shu-tao,WANG Gui-chuan,CHE Xian-ge. Research on the Detection of Methane Using Hollow Photonic Band Gap Fiber. Acta Metrologica Sinica, 2019, 40(6): 1135-1139.
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2019, Vol. 40 
