Abstract
The noise level in single-pulse resonant nitrogen CARS spectra is shown to decrease with increasing pump laser bandwidth. This is the reverse of the trend observed for nonresonant CARS spectra. The precision of single-pulse CARS temperature measurements is shown to be dramatically increased by performing a weighted fit of theoretical and experimental CARS spectra using the measured detector noise coefficients as weighting parameters. The inclusion of collisional narrowing and cross-coherence in the CARS theory calculations and their effect on best fit temperatures are discussed. These temperatures, measured in a flat-flame burner, are compared with those obtained by Na line-reversal.
© 1987 Optical Society of America
Full Article | PDF ArticleMore Like This
D. R. Snelling, R. A. Sawchuk, and R. E. Mueller
Appl. Opt. 24(17) 2771-2778 (1985)
D. R. Snelling, T. Parameswaran, and G. J. Smallwood
Appl. Opt. 26(19) 4298-4302 (1987)
Stefan Kröll, Marcus Aldén, Thomas Berglind, and Robert J. Hall
Appl. Opt. 26(6) 1068-1073 (1987)