Theoretical studies of resonance enhanced stimulated raman scattering (RESRS) of frequency doubled Alexandrite laser wavelengths in cesium vapor. Progress report
This work focused on understanding the effects of arbitrary transverse and longitudinal relaxation rates on the susceptibilities of coherently driven three-level systems. The approximation of a single relaxation rate often made in previous work is strongly invalidated by the variation in the spontaneous emission lifetime between various atomic level pairs in systems such as cesium. It is of great importance to the problem of nonlinear infrared generation to determine the dependence of both real and imaginary susceptibility on relaxation rates. The imaginary susceptibility on the pump transition determines the absorption of pump photons and the imaginary susceptibility on the laser transition determines the spectral dependence of the gain. This is of particular importance for pure Raman emission (i.e., absorption at linecenter of the gain transition) as it determines the tunability characteristics we are aiming to predict. The real susceptibility is important when cavities are used at the signal field as this will determine the loaded resonance of the Raman oscillator. Researchers show that in some cases which result from having different relaxation rates mode splitting may result, allowing more than one frequency to have the same Raman wavelength, possibly resulting in a temporal instability.
- Research Organization:
- Brown Univ., Providence, RI (USA)
- OSTI ID:
- 6951391
- Report Number(s):
- N-86-32717; NASA-CR-179768; NAS-1.26:179768
- Country of Publication:
- United States
- Language:
- English
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Theoretical studies of resonance enhance stimulated raman scattering (RESRS) of frequency doubled Alexandrite laser wavelengths in cesium vapor. Semiannual report
Theoretical studies of resonance enhanced stimulated raman scattering (RESRS) of frequency doubled Alexandrite laser wavelength in cesium vapor. Progress report, July-December 1987
Related Subjects
LASERS
RELAXATION
CESIUM
ENERGY LEVELS
INFRARED RADIATION
PHOTONS
RAMAN SPECTRA
RESONANCE
TIME DEPENDENCE
WAVE FUNCTIONS
WAVELENGTHS
ALKALI METALS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FUNCTIONS
MASSLESS PARTICLES
METALS
RADIATIONS
SPECTRA
420300* - Engineering- Lasers- (-1989)