Background-Free Species Detection in Sooty Flames Using Degenerate Four-Wave Mixing

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Abstract:

The background radiation disturbance in luminous environments has been compared for degenerate four-wave mixing (DFWM) and laser-induced fluorescence (LIF) for OH radical detection in a sooty propane/ oxygen flame. The LIF signal generally was considerably stronger than the DFWM signal, but in strongly sooty environments the LIF signal was accompanied by a significant background signal, while the DFWM signal was background-free under all soot loads tested.

Keywords: Combustion diagnostics; Degenerate four-wave mixing; Laser-induced fluorescence

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702934334633

Affiliations: 1: Department of Combustion Physics, Lund Institute of Technology, P.O. Box 118, S-221 00 Lund, Sweden; present affiliation: Department of Physics 2: Department of Combustion Physics, Lund Institute of Technology, P.O. Box 118, S-221 00 Lund, Sweden

Publication date: October 1, 1993

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