12 May 2005 High sensitivity absorption spectroscopy of CH4 around 1.31 μm
Author Affiliations +
Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005); doi: 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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jie Shao, Xiaoming Gao, Yong Yang, Wei Huang, Shixing Pei, Yiqian Yuan, 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); doi: 10.1117/12.619866; https://doi.org/10.1117/12.619866
PROCEEDINGS
8 PAGES


SHARE
KEYWORDS
Absorption

Semiconductor lasers

Modulation

Absorption spectroscopy

Signal detection

Signal to noise ratio

Tunable diode lasers

Back to Top