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Proceedings Paper

Optimization of the optical path of the methane telemetry system based on TDLAS technology
Author(s): Chunlei Xiao; Shuyang Hu
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Paper Abstract

Spectroscopic measurement of methane gas concentrations using absorption lines in the near infra-red (the 1.67 μm region) has been demonstrated by several research teams. In this paper, a methane telemetry system based on tunable diode laser absorption spectroscopy (TDLAS) is proposed and demonstrated. The center wavelength of the laser is locked to the methane absorption peak and the second harmonic detection technology is used to realize the real time monitoring of the methane gas concentration. To receive more signal light and enhance the signal to noise ratio, a lens and its focal length, the spot size of the reflecting surface and a filter plate are used to optimizing the optical path. The experimental results show that after optimizing methane telemetry system the minimum detection limit can be enhance from 20000 ppm to 5000 ppm in the distance of 20 meters.

Paper Details

Date Published: 12 March 2020
PDF: 13 pages
Proc. SPIE 11434, 2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 114341B (12 March 2020); doi: 10.1117/12.2550068
Show Author Affiliations
Chunlei Xiao, Beijing Univ. of Technology (China)
Beijing Aerospace Science and Technology Development Co., Ltd. (China)
Shuyang Hu, Beijing Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11434:
2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Juan Liu; Baohua Jia; Xincheng Yao; Yongtian Wang; Takanori Nomura, Editor(s)

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