Abstract

The rotational Raman scattered light from nitrogen present in a flame is analyzed with a Fabry-Perot interferometer whose free spectral range is matched to the frequency separation of the Raman lines. The resulting interferograms are fit to theoretical interferograms using a least-χ² technique. Flame temperatures obtained from this analysis are compared to in situ thermocouple measurements with reasonable agreement. The measured temperatures are compared to other published data, and sources of error are discussed.

© 1983 Optical Society of America

Rotational Raman Interferometric Technique to Measure Gas Temperatures

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