Asynchronous Optical Sampling for Laser-Based Combustion Diagnostics in High-Pressure Flames
Final rept. 15 Dec 1988-31 Jan 1989
PURDUE UNIV LAFAYETTE IN DEPT OF CHEMISTRY
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This report describes progress on the development of a new laser-based combustion diagnostic for the quantitative measurement of both major and minor species in high pressure flames. The technique, Asynchronous Optical Sampling ASOPS, is a state-of-the-art improvement in picosecond pumpprobe spectroscopy. The timing parameters for the current ASOPS instrument are described and consideration is given to the optimization of these parameters. Results from the study of the sodium atom in an atmospheric flame are presented. Instrumental changes are shown that considerably improve the ASOPS signal-to-noise ratio. A technique for optimization of ultra violet generation is demonstrated and initial hydroxyl fluorescence experiments are described. Keywords Pump probe spectroscopy Combustion Laser diagnostics Stimulated emission.
- Test Facilities, Equipment and Methods
- Combustion and Ignition