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Pure rotational Coherent anti-Stokes Raman spectroscopy of water vapor and its relevance for combustion diagnostics

Nordström, Emil LU ; Bohlin, Alexis LU and Bengtsson, Per-Erik LU (2013) In Journal of Raman Spectroscopy 44(10). p.1322-1325
Abstract
In this work, we report for the first time the rotational coherent anti-Stokes Raman spectroscopy (CARS) spectrum of water vapor, recorded through experiments at 400K and 670K for Raman shifts up to 600cm(-1). Using the standard dual-broadband pure rotational CARS approach, the resonant structure was overwhelmed by a strong non-resonant background. By employing a polarization technique, this background could be suppressed and the resonant structure discerned. The spectral line structure matched spectra from spontaneous rotational Raman scattering found in the literature. The CARS signal intensity at the highest peak from water vapor at 400K was more than five orders of magnitude weaker than for N-2 because of a low Raman cross section and... (More)
In this work, we report for the first time the rotational coherent anti-Stokes Raman spectroscopy (CARS) spectrum of water vapor, recorded through experiments at 400K and 670K for Raman shifts up to 600cm(-1). Using the standard dual-broadband pure rotational CARS approach, the resonant structure was overwhelmed by a strong non-resonant background. By employing a polarization technique, this background could be suppressed and the resonant structure discerned. The spectral line structure matched spectra from spontaneous rotational Raman scattering found in the literature. The CARS signal intensity at the highest peak from water vapor at 400K was more than five orders of magnitude weaker than for N-2 because of a low Raman cross section and a larger number of transitions. Due to the weak resonant signal, water vapor is an unsuitable candidate for CARS thermometry and relative concentration measurements in combustion. Still, rotational CARS spectra from product gases in combustion will be affected by the presence of water, which is briefly discussed. Copyright (c) 2013 John Wiley & Sons, Ltd. (Less)
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type
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publication status
published
subject
in
Journal of Raman Spectroscopy
volume
44
issue
10
pages
1322 - 1325
publisher
John Wiley and Sons Inc.
external identifiers
  • wos:000326276000003
  • scopus:84886302927
ISSN
1097-4555
DOI
10.1002/jrs.4275
language
English
LU publication?
yes
id
be5259b7-24b2-4c0b-a802-74aba483e9b0 (old id 4160089)
date added to LUP
2016-04-01 10:16:53
date last changed
2020-02-19 01:16:41
@article{be5259b7-24b2-4c0b-a802-74aba483e9b0,
  abstract     = {In this work, we report for the first time the rotational coherent anti-Stokes Raman spectroscopy (CARS) spectrum of water vapor, recorded through experiments at 400K and 670K for Raman shifts up to 600cm(-1). Using the standard dual-broadband pure rotational CARS approach, the resonant structure was overwhelmed by a strong non-resonant background. By employing a polarization technique, this background could be suppressed and the resonant structure discerned. The spectral line structure matched spectra from spontaneous rotational Raman scattering found in the literature. The CARS signal intensity at the highest peak from water vapor at 400K was more than five orders of magnitude weaker than for N-2 because of a low Raman cross section and a larger number of transitions. Due to the weak resonant signal, water vapor is an unsuitable candidate for CARS thermometry and relative concentration measurements in combustion. Still, rotational CARS spectra from product gases in combustion will be affected by the presence of water, which is briefly discussed. Copyright (c) 2013 John Wiley & Sons, Ltd.},
  author       = {Nordström, Emil and Bohlin, Alexis and Bengtsson, Per-Erik},
  issn         = {1097-4555},
  language     = {eng},
  number       = {10},
  pages        = {1322--1325},
  publisher    = {John Wiley and Sons Inc.},
  series       = {Journal of Raman Spectroscopy},
  title        = {Pure rotational Coherent anti-Stokes Raman spectroscopy of water vapor and its relevance for combustion diagnostics},
  url          = {http://dx.doi.org/10.1002/jrs.4275},
  doi          = {10.1002/jrs.4275},
  volume       = {44},
  year         = {2013},
}