Doppler-free two-photon-excited fluorescence spectroscopy of OH in flames
- 1 April 1988
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 5 (4) , 749-755
- https://doi.org/10.1364/josab.5.000749
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.Keywords
This publication has 20 references indexed in Scilit:
- Time-resolved fluorescence investigation of rotational transfer in A^2∑^+ (v = 0) OHApplied Optics, 1986
- Measurement of collision-induced shift and broadening of the ultraviolet transitions of OHThe Journal of Chemical Physics, 1985
- Two-photon spectroscopy of the A 2Σ+–X 2Πi system of OHThe Journal of Chemical Physics, 1983
- Collisional Effects On Laser-Induced Fluorescence Flame MeasurementsOptical Engineering, 1981
- Rotational dependence in the linewidth of the ultraviolet transitions of OHPhysical Review A, 1980
- The OH collision broadening parameter in the 2900°K H2-NO flameJournal of Quantitative Spectroscopy and Radiative Transfer, 1980
- Radiative lifetimes of OH(A2Σ) and Einstein coefficients for the A-X system of OH and ODJournal of Quantitative Spectroscopy and Radiative Transfer, 1979
- Oscillator strengths from line absorption in a high-temperature furnace—I. The (0,0) and (1,0) bands of the A2Σ+ - X2Πi transition in OH and ODJournal of Quantitative Spectroscopy and Radiative Transfer, 1973
- Collisional broadening of OH 2Σ+−2π lines in flamesJournal of Quantitative Spectroscopy and Radiative Transfer, 1970
- Zeeman scanning of hydroxyl and zinc absorption line profiles in flames at atmospheric and reduced pressureCombustion and Flame, 1969