Theoretical studies of resonance enhance stimulated raman scattering (RESRS) of frequency doubled Alexandrite laser wavelengths in cesium vapor. Semiannual report
It is well known that the presence of a real atomic level which is nearly resonant with the pump field can greatly enhance the Raman emission cross section. In order to accurately calculate the Raman gain in systems where resonance enhancement plays a dominant role, expressions for the pump and signal susceptibilities must be derived. These expressions should be valid for arbitrary field strengths in order to allow for pump and signal saturation. In addition, the theory should allow for arbitrary longitudinal and transverse relaxation rates. This latter point is extremely vital for three level atomic systems such as the alkali earth metals since they do not have population reservoirs and can have widely varying spontaneous lifetimes on the three pertinent transitions. Moreover, the dephasing rates are strong functions of electron states and are therefore also different for the three coupled pairs of levels. These considerations are not as important when molecular systems are concerned since the large reservoir of rotational states serve to produce essentially equal longitudinal recovery rates for the population of the three levels. The three level system with three arbitrary longitudinal and transverse relaxation rates was solved. There is no need for setting either pair of rates equal and the expressions are valid for arbitrarily strong fields.
- Research Organization:
- Brown Univ., Providence, RI (USA)
- OSTI ID:
- 5812808
- Report Number(s):
- N-86-17731
- Country of Publication:
- United States
- Language:
- English
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Theoretical studies of Resonance Enhanced Stimulated Raman Scattering (RESRS) of frequency-doubled Alexandrite laser wavelength in cesium vapor. Progress report, January-June 1987
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ENERGY LEVELS
METAL VAPOR LASERS
PUMPING
CESIUM
NUMERICAL ANALYSIS
RAMAN SPECTRA
THEORETICAL DATA
DATA
ELEMENTS
GAS LASERS
INFORMATION
LASERS
MATHEMATICS
METALS
NUMERICAL DATA
SPECTRA
420300* - Engineering- Lasers- (-1989)
640302 - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory