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High sensitive detection of atmospheric methane using infrared laser absorption spectroscopy
Author(s): Jian Sang; Xiaoyun Yang; Tianbo He; Jingsong Li
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Paper Abstract

Methane (CH4), a key greenhouse by influencing tropospheric ozone (O3) and stratospheric water vapor (H2O), plays an important role on the process of global warming and climate change. In this paper, we report on the development of a gas sensing technique based on high sensitive tunable diode laser absorption spectroscopy (TDLAS). A room-temperature distributed-feedback (DFB) diode laser near 1653 nm is used to excite the rotational-vibrational absorption line of CH4 molecule. Direct absorption spectroscopy and wavelength modulation spectroscopy were used for investigating methane molecular line parameters and sensing gas concentration, respectively. Moreover, potential strategies for sensitivity improvement are also discussed.

Paper Details

Date Published: 17 May 2019
PDF: 8 pages
Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111700C (17 May 2019); doi: 10.1117/12.2531687
Show Author Affiliations
Jian Sang, Anhui Univ. (China)
Xiaoyun Yang, Anhui Univ. (China)
Tianbo He, Anhui Univ. (China)
Jingsong Li, Anhui Univ. (China)


Published in SPIE Proceedings Vol. 11170:
14th National Conference on Laser Technology and Optoelectronics (LTO 2019)
Jianqiang Zhu; Weibiao Chen; Zhenxi Zhang; Minlin Zhong; Pu Wang; Jianrong Qiu, Editor(s)

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