New Laser Technique for the Identification of Molecular Transitions
- 1 December 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 6 (6), 2302-2311
- https://doi.org/10.1103/physreva.6.2302
Abstract
A laser technique is proposed which may be useful for the assignment of molecular spectra in the visible and infrared regions. The method is based on the resonant interaction of two monochromatic fields with a Doppler-broadened three-level system. Under the appropriate conditions the absorption line shape of one of the transitions shows a complex structure over a narrow section of the Doppler profile, and for sufficiently high laser power the line shape splits into a number of narrow peaks. Analysis of the resulting intensity pattern leads to unambiguous assignment of the angular momentum quantum numbers of the three levels involved. A simple set of rules is given to facilitate interpretation of spectra. The line shapes discussed are also relevant to monochromatic optical pumping of gases and unidirectional laser amplifiers.Keywords
This publication has 10 references indexed in Scilit:
- Anisotropic Ultrahigh Gain Emission Observed in Rotational Transitions in Optically Pumped HF GasApplied Physics Letters, 1972
- Laser-Induced Line-Narrowing Effects in Coupled Doppler-Broadened Transitions. II. Standing-Wave FeaturesPhysical Review A, 1972
- Possibility of a Unidirectional Laser Amplifier Produced by Monochromatic Optical Pumping of a Coupled Doppler-Broadened TransitionApplied Physics Letters, 1971
- Theory of a three-level gas laser amplifierThe European Physical Journal A, 1970
- Stark Spectroscopy of NH3 ν2 Band by 10-μ CO2 and N2O LasersThe Journal of Chemical Physics, 1970
- Laser-Induced Line-Narrowing Effects in Coupled Doppler-Broadened TransitionsPhysical Review B, 1969
- Pressure Shift and Broadening of Methane Line at 3.39Studied by Laser-Saturated Molecular AbsorptionPhysical Review Letters, 1969
- Pressure broadening and lineshape considerations in double resonance modulated microwave spectroscopyJournal of Molecular Spectroscopy, 1968
- Theory of a Three-Level MaserPhysical Review B, 1957
- Absolute Infrared Intensities of Vibration Bands in Ammonia and PhosphineThe Journal of Chemical Physics, 1956