High sensitivity absorption spectroscopy of CH4 around 1.31 µm

Jie Shao; Xiaoming Gao; Yong Yang; Wei Huang; Shixing Pei; Yiqian Yuan; Weijun Zhang

doi:10.1117/12.619866

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12 May 2005 High sensitivity absorption spectroscopy of CH₄ around 1.31 μm

Jie Shao, Xiaoming Gao, Yong Yang, Wei Huang, Shixing Pei, Yiqian Yuan, Weijun Zhang

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Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619866
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

The absorption spectra of CH₄ around 1.31 μm have been observed by wavelength modulation absorption spectroscopy technique employed with a tunable diode laser at different pressure. The overtone spectra of CH₄ around 1.31 μm and the corresponding spectral parameters (i.e. positions intensities self-broadening coefficients) are presented. The intensity of the weakest line detected is 1.306x10^-26 cm^-1/(molecule-cm^-2) at the pressure of 0.077 Torr with a corresponding absorption of l.174x10^-7.

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Jie Shao, Xiaoming Gao, Yong Yang, Wei Huang, Shixing Pei, Yiqian Yuan, and Weijun Zhang "High sensitivity absorption spectroscopy of CH₄ around 1.31 μm", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619866

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