Abstract

A cross-beam saturated absorption spectroscopy technique, utilizing a single pulsed dye laser, has been developed for local concentration measurements in flames. With a differential detection of the probe and the reference laser beam intensities, a significant improvement of the technique has been achieved. In this work the basic theory of the method is discussed. Its use in combustion studies is demonstrated by presenting OH concentration profiles in two premixed laminar methane-air flames.

© 1987 Optical Society of America

Photoacoustic detection of OH molecules in a methane–air flame

A. Rose, J. D. Pyrum, G. J. Salamo, and R. Gupta
Appl. Opt. 23(10) 1573-1579 (1984)

Cross-beam polarization in flames with a pulsed dye laser

G. Zizak, J. Lanauze, and J. D. Winefordner
Appl. Opt. 25(18) 3242-3246 (1986)

Hydroxyl (OH) distributions and temperature profiles in a premixed propane flame obtained by laser deflection techniques

Sigmund W. Kizirnis, Robert J. Brecha, Biswa N. Ganguly, Larry P. Goss, and Rajendra Gupta
Appl. Opt. 23(21) 3873-3881 (1984)

Hydroxyl and its concentration profile in methane–air flames

J. H. Bechtel and R. E. Teets
Appl. Opt. 18(24) 4138-4144 (1979)

Local absorption measurement by laser-induced fluorescence

D. Stepowski
Appl. Opt. 26(9) 1631-1635 (1987)