Abstract

Asynchronous optical sampling (ASOPS) is a pump–probe method that has strong potential for use in turbulent, high-pressure flames. We show that rapid measurement of species number density can be achieved by maintaining a constant beat frequency between the mode-locking frequencies of the pump and probe lasers. We also describe the instrumental timing parameters for ASOPS and consider the optimization of these parameters. Measurement of the nanosecond decay for electronically excited sodium in an atmospheric flame demonstrates the viability of the ASOPS technique in highly quenched flame environments.

© 1989 Optical Society of America

Measurements of atomic sodium in flames by asynchronous optical sampling: theory and experiment

Gregory J. Fiechtner, Galen B. King, Normand M. Laurendeau, and F. E. Lytle
Appl. Opt. 31(15) 2849-2864 (1992)

Quantitative concentration measurements of atomic sodium in an atmospheric hydrocarbon flame with asynchronous optical sampling

Gregory J. Fiechtner, Galen B. King, and Normand M. Laurendeau
Appl. Opt. 34(6) 1117-1126 (1995)

Approach for a quantitative on-the-fly fluorescence diagnostic in combustion systems

Angelo J. Alfano
Appl. Opt. 28(23) 5010-5015 (1989)

Simultaneous measurement of Raman scattering and laser-induced OH fluorescence in nonpremixed turbulent jet flames

R. S. Barlow, R. W. Dibble, and R. P. Lucht
Opt. Lett. 14(5) 263-265 (1989)

Pump/probe method for fast analysis of visible spectral signatures utilizing asynchronous optical sampling

Paul A. Elzinga, Ronald J. Kneisler, Fred E. Lytle, Yanan Jiang, Galen B. King, and Normand M. Laurendeau
Appl. Opt. 26(19) 4303-4309 (1987)