Thermometry of an oxy-acetylene flame using multiplex degenerate four-wave mixing of C-2. Kaminski, C., F., Hughes, I., G., Lloyd, G., M., & Ewart, P. Applied Physics B: Lasers and Optics, 62(1):39-44, 1, 1996.
Thermometry of an oxy-acetylene flame using multiplex degenerate four-wave mixing of C-2 [pdf]Paper  abstract   bibtex   
Thermometry of an oxy-acetylene flame using multiplex Degenerate Four-Wave Mixing (DFWM) of C-2 is demonstrated. More than 100 rotational transitions in the d(3) Pi(g) <-- a(3) Pi(u) (0, 0) Swan band of C-2 could be recorded simultaneously by use of a pulsed, broad bandwidth `'modeless'' laser. Temperatures were inferred by fitting temperature-dependent synthetic spectra of single- or multiple-shot averaged spectra. The strength and reliability of recorded signals together with the large number of rotational lines observed suggest that multiplex DFWM is a promising technique for minor species detection and for temporally resolved temperature measurements in luminous environments. Factors influencing the accuracy and precision of single-shot thermometry using the technique are discussed.

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