Detection of methane with mid-infrared polarization spectroscopy
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/272247
- author
- Li, Zhongshan LU ; Rupinski, M ; Zetterberg, Johan LU ; Alwahabi, ZT and Aldén, Marcus LU
- organization
- publishing date
- 2004
- 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
- 2016-04-01 12:37:20
- date last changed
- 2022-01-27 07:34:00
@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}}, doi = {{10.1007/s00340-004-1475-9}}, volume = {{79}}, year = {{2004}}, }