Abstract
High-resolution, Doppler-free fluorescence excitation spectra of OH A2Σ+ ← X2Π(0, 0)-band transitions were measured in low-pressure hydrogen-oxygen flames. A pulse-amplified cw dye-laser system with a 40-MHz bandwidth was used in a counterpropagating-beam geometry to excite the OH transitions by two-photon absorption. Hyperfine splittings of 15 rovibronic transitions were determined, and water-vapor pressure-broadening coefficients were measured for four of the transitions by varying the total pressure of the flame. Direct observation of the collision-broadened line shape made it unnecessary to resort to any deconvolution procedures. To our knowledge, this is the first application of a Doppler-free spectroscopic technique in a combustion environment.
© 1988 Optical Society of America
Full Article | PDF ArticleMore Like This
J. E. M. Goldsmith and Normand M. Laurendeau
Appl. Opt. 25(2) 276-283 (1986)
J. E. M. Goldsmith and L. A. Rahn
Opt. Lett. 15(14) 814-816 (1990)
Jennifer L. Palmer and Ronald K. Hanson
Appl. Opt. 35(3) 485-499 (1996)