Thermometry of an oxy-acetylene flame using multiplex degenerate four-wave mixing of C-2

Journal article

Thermometry of an oxy-acetylene flame using multiplex Degenerate Four-Wave Mixing (DFWM) of C2 is demonstrated. More than 100 rotational transitions in the d3Πg → α3Πu (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.

Authors: Kaminski, C; Hughes, I; Lloyd, G; Ewart, P

• Publication status: Published
• Journal: APPLIED PHYSICS B-LASERS AND OPTICS
• Volume: 62
• Issue: 1
• Pages: 39-44
• Publication date: 1996-01-01
• DOI: 10.1007/BF01081245
• EISSN: 1432-0649
• ISSN: 0946-2171
• Language: English