Development of rotational CARS for combustion diagnostics using a polarization approach

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


Rotational Coherent anti-Stokes Raman spectroscopy (CARS) has the last decades been developed into a useful tool for thermometry and concentration measurements in combustion. In this paper, we present a novel polarization approach of the technique, which will enhance its potential and widen the range of conditions at which it can be utilized. The theory of the polarization approach is described in detail. It is shown that by specific arrangement of the polarizations of the laser beams, total suppression of the non-resonant background signal can be obtained, and thus by probing only the resonant CARS signal the diagnostic utility of the technique increases. The main benefit of the approach is in situations where the non-resonant background signal is relatively high in comparison with the resonant signal. The high potential of polarization rotational CARS for thermometry is demonstrated in some illustrative examples, for example, nitrogen thermometry on the fuel side of diffusion flames, and carbon monoxide thermometry in the product gas of ethylene/oxygen/argon-flames. © 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics


  • Combustion diagnostics, Thermometry, Diffusion flames
Original languageEnglish
Title of host publicationProceedings of the Combustion Institute
Volume31 I
Publication statusPublished - 2007
Publication categoryResearch
Event31st International Symposium on Combustion - Heidelberg, Germany
Duration: 2006 Aug 52006 Aug 11

Publication series

Volume31 I
ISSN (Print)1540-7489
ISSN (Electronic)1873-2704


Conference31st International Symposium on Combustion