Suppression effects in stimulated hyper-Raman emissions and parametric four-wave mixing in sodium vapor

Journal Article · Fri May 01 04:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.6687· OSTI ID:7300876

Garrett, W R; Moore, M A; Hart, R C; Payne, M G ^[1]; Wunderlich, R ^[2]

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1. Chemical Physics Section, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125 (United States)

Experimental investigations of two-photon enhanced stimulated hyper-Raman and parametric four-wave-mixing emissions are described for tuning unfocused laser beams near two-photon resonance with 3{ital D} and 4{ital D} states in sodium vapor. Over wide ranges of vapor pressures, path lengths, and laser power densities, the gains for stimulated hyper-Raman (SHR) scattering and for parametric four-wave mixing (PFWM) can become very greatly reduced from values expected from simple considerations. The suppression of gain can arise from interferences produced at two-photon and three-photon resonances, and from ac Stark shifts produced by internally generated near-resonant fields. Quantitative comparisons are made between observed and theoretically predicted values for SHR and PFWM production. Of 12 predicted consequences of the interferences and Stark shifting on the nonlinear behavior, ten are demonstrated through the experiments.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7300876
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002 -- Engineering-- Lasers & Masers-- (1990-)
664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
D STATES
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FLUIDS
FREQUENCY MIXING
GASES
LASER RADIATION
METALS
MULTI-PHOTON PROCESSES
RADIATIONS
RAMAN EFFECT
SODIUM
STIMULATED EMISSION
VAPORS