Temperature measurements in flames using water molecule overtone spectra detected by intracavity laser absorption spectroscopy

S. Cheskis*, A. Kachanov, M. Chenevier, F. Stoeckel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Overtone absorption spectra of water molecules were recorded with intracavity laser absorption spectroscopy (ICLAS) based on a Ti:Sapphire laser with atmospheric pressure methane/air or hydrogen/air flame was placed into the cavity of the Ti:Sapphire laser. Though the flame occupied a small part of the cavity, substantial changes in the water spectrum were observed and new lines appeared. This suggests the possibility of measuring temperature in flames using an ICLAS spectrum of the water. Computer simulations based on the water spectrum lines assigned in the literature showed that a sensitivity of about ten degrees can be expected. The use of lines with higher rotational quantum numbers could substantially improve the sensitivity.

Original languageEnglish
Pages (from-to)713-716
Number of pages4
JournalApplied Physics B: Lasers and Optics
Volume64
Issue number6
DOIs
StatePublished - Jun 1997

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