Thermometry of an oxy-acetylene flame using multiplex degenerate four-wave mixing of C2 |
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Authors: | C. F. Kaminski I. G. Hughes G. M. Lloyd P. Ewart |
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Affiliation: | (1) Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU Oxford, UK |
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Abstract: | Thermometry of an oxy-acetylene flame using multiplex Degenerate Four-Wave Mixing (DFWM) of C2 is demonstrated. More than 100 rotational transitions in thed3g a3u (0,0) Swan band of C2 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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Keywords: | 42.65 33.20 |
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