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Detection of methane with mid-infrared polarization spectroscopy

Li, Zhongshan LU ; Rupinski, M; Zetterberg, Johan LU ; Alwahabi, ZT and Aldén, Marcus LU (2004) In Applied Physics B 79(2). p.135-138
Abstract
We report on the application of polarization spectroscopy in the midinfrared spectral region for the detection of methane by probing its asymmetric ro-vibrational transitions. Tunable infrared laser radiation, near 3.4 mum, was obtained from difference-frequency generation in a LiNbO3 crystal. Infrared polarization spectroscopy (IRPS) spectra of the P, Q and R branches of the nu(3) band, recorded with both linearly and circularly polarized pump beams, are presented. The experiments were performed in an atmospheric pressure gas jet with methane diluted with Ar. An IRPS spectrum with signal-to-noise ratio better than 10(4) was observed. The dependence of the IRPS signal intensity on the methane mole fraction and on the pumping laser power... (More)
We report on the application of polarization spectroscopy in the midinfrared spectral region for the detection of methane by probing its asymmetric ro-vibrational transitions. Tunable infrared laser radiation, near 3.4 mum, was obtained from difference-frequency generation in a LiNbO3 crystal. Infrared polarization spectroscopy (IRPS) spectra of the P, Q and R branches of the nu(3) band, recorded with both linearly and circularly polarized pump beams, are presented. The experiments were performed in an atmospheric pressure gas jet with methane diluted with Ar. An IRPS spectrum with signal-to-noise ratio better than 10(4) was observed. The dependence of the IRPS signal intensity on the methane mole fraction and on the pumping laser power density was investigated. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics B
volume
79
issue
2
pages
135 - 138
publisher
Springer
external identifiers
  • wos:000222943300001
  • scopus:3142674200
ISSN
0946-2171
DOI
10.1007/s00340-004-1475-9
language
English
LU publication?
yes
id
16dec877-9b0c-49a9-ae47-3e099ca8786a (old id 272247)
date added to LUP
2007-10-24 18:38:47
date last changed
2017-01-01 05:18:27
@article{16dec877-9b0c-49a9-ae47-3e099ca8786a,
  abstract     = {We report on the application of polarization spectroscopy in the midinfrared spectral region for the detection of methane by probing its asymmetric ro-vibrational transitions. Tunable infrared laser radiation, near 3.4 mum, was obtained from difference-frequency generation in a LiNbO3 crystal. Infrared polarization spectroscopy (IRPS) spectra of the P, Q and R branches of the nu(3) band, recorded with both linearly and circularly polarized pump beams, are presented. The experiments were performed in an atmospheric pressure gas jet with methane diluted with Ar. An IRPS spectrum with signal-to-noise ratio better than 10(4) was observed. The dependence of the IRPS signal intensity on the methane mole fraction and on the pumping laser power density was investigated.},
  author       = {Li, Zhongshan and Rupinski, M and Zetterberg, Johan and Alwahabi, ZT and Aldén, Marcus},
  issn         = {0946-2171},
  language     = {eng},
  number       = {2},
  pages        = {135--138},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Detection of methane with mid-infrared polarization spectroscopy},
  url          = {http://dx.doi.org/10.1007/s00340-004-1475-9},
  volume       = {79},
  year         = {2004},
}