TWO DEGENERATE FOUR-WAVE MIXING TECHNIQUES FOR MEASUREMENT OF OH IN LAMINAR FLAMES FROM 1 TO 9 BAR COMPARED WITH LASER-INDUCED FLUORESCENCE AND ABSORPTION MEASUREMENTS

1994 ◽  
Vol 3 (1-6) ◽  
pp. 167-178
Author(s):  
E. Domingues ◽  
M.-J. Cottereau ◽  
Douglas A. Feikema
Keyword(s):  
Four Wave Mixing ◽  
Laser Induced Fluorescence ◽  
Laminar Flames ◽  
Wave Mixing ◽  
Degenerate Four Wave Mixing ◽  
Mixing Techniques ◽  
Absorption Measurements

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

1993 ◽  
Vol 47 (10) ◽  
pp. 1620-1622 ◽  
Author(s):  
S. Kröll ◽  
C. Löfström ◽  
M. Aldén
Keyword(s):  
Background Radiation ◽  
Four Wave Mixing ◽  
Laser Induced Fluorescence ◽  
Oh Radical ◽  
Wave Mixing ◽  
Background Signal ◽  
Species Detection ◽  
Radical Detection ◽  
Degenerate Four Wave Mixing ◽  
Oxygen Flame

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.

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