Three-colour CARS spectroscopy of the OH radical at triple resonance
- 1 May 1990
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 70 (1) , 1-51
- https://doi.org/10.1080/00268979000100831
Abstract
A coherent anti-Stokes Raman-scattering (CARS) study of the OH radical is conducted using resonance enhancement from the A2σ+-X2Π transition. A review of previous work on resonance-enhanced CARS is first given. The OH radical has specific one-photon spectral properties that lead to original CARS features; main and satellite CARS processes are thus defined at resonance. The use of resonance-enhanced CARS for the detection of OH is discussed. Optimum detectivity is obtained at triple resonance. Triple resonance can be nearly achieved using only two lasers on satellite CARS lines, but the best results are obtained on the main CARS lines using three lasers. This is verified experimentally in a discharge and in a one-atmosphere flat flame. Extra resonances from the excited electronic-state vibration are clearly seen. The results indicate that detection of OH in flames at high pressures should be easily feasible.Keywords
This publication has 93 references indexed in Scilit:
- Non-resonant background suppression in preresonance CARS spectra of flavin adenine dinucleotide: Demonstration of a background suppression technique using phase mismatching and comparison with the polarization-sensitive CARS techniqueJournal of Raman Spectroscopy, 1989
- Resonance CARS Study of Electronic Excited MoleculesApplied Spectroscopy Reviews, 1985
- Resonance CARS spectrum of the short-lived dimethyl terephthalate Anion radicalJournal of Raman Spectroscopy, 1985
- Resonance CARS spectra of the lowest excited singlet states of rhodaminesChemical Physics Letters, 1984
- Resonance CARS and CSRS line shapes of Ni(II)-octaethylporphyrinThe Journal of Chemical Physics, 1980
- Background-free cars studies of carbon monoxide in a flameOptics Communications, 1979
- Resolved Structure within the Broad-Band Vibrational Raman Line of LiquidO from Polarization Coherent Anti-Stokes Raman SpectroscopyPhysical Review Letters, 1979
- Polarization-sensitive coherent anti-Stokes Raman spectroscopyApplied Physics Letters, 1979
- Excitation profiles of the coherent anti-Stokes resonance Raman spectrum of β-caroteneThe Journal of Chemical Physics, 1977
- Coherent anti-Stokes Raman spectroscopy (CARS): Improved experimental design and observation of new higher-order processesApplied Physics Letters, 1976