Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

AIP conference proceedings

Suppression of two-photon resonantly enhanced nonlinear processes in extended media

W. R. Garrett, Mary Anne Moore, M. G. Payne, Rainer Wunderlich

Published Jan 1, 1989• 0 citations
Publisher

Abstract

On the basis of combined experimental and theoretical studies of nonlinear processes associated with two‐photon excitations near 3d and 4d states in Na, we show how resonantly enhanced stimulated hyper‐Raman emission, parametric four‐wave mixing processes and total resonant two‐photon absorption can become severely suppressed through the actions of internally generated fields on the total atomic response in extended media.

DOI
10.1063/1.38561

Related papers

Suppression of two-photon resonantly enhanced nonlinear processes in extended media

W. R. Garrett, Moore, M. G. Payne +1 more

On the basis of combined experimental and theoretical studies of nonlinear processes associated with two-photon excitations near 3d and 4d states in Na, we show how resonantly enhanced stimulated hyper-Raman emission, parametric four-wave mixing processes and total resonant two-photon absorption can become severely suppressed through the actions of internally generated fields on the total atomic response in extended media. 7 refs., 3 figs.

•Nov 1, 1988•0 citations

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

W. R. Garrett, Mary Anne Moore, Roger C. Hart +2 more

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 3D and 4D 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.

Physical Review A•May 1, 1992•44 citations

Suppression and shifting of odd-photon resonant excitations and stimulated hyper-Raman emissions

W. R. Garrett, M. G. Payne

When a principal atomic transition (dipole allowed from the ground state) is driven by odd- multi-photon excitation or by stimulated hyper-Raman scattering, a nonlinear multi-wave mixing field is generated at the transition frequency. A number of dramatic effects on such odd-photon mediated processes can ensue as a result of the internally generated wave-mixing fields. Excellent agreement between theory and experimental studies in Xe and in metal vapors is illustrated for a number of predicted effects including: suppression and strong shifting of resonance lines and hyper-Raman emissions under single and multi-laser excitation. We illustrate the dependence of the interference-related effects on pressure, oscillator strength, wavelength combination and relative propagation directions of pump laser beams. Contrary to most other nonlinear effects, we show that none of the features (in the semi-classical regime) depends on the intensity of the driving laser field.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 1, 1992•0 citations

Nonlinear optical processes near the sodium 4Dtwo-photon resonance

Richard Wunderlich, W. R. Garrett, Roger C. Hart +2 more

The nonlinear response of sodium vapor with a laser tuned near the 4D two-photon resonance is investigated over a large range of sodium concentrations and pump intensities with emphasis on the influence of coherent cancellation effects on the induced polarizations and the primary mechanism for the generation of the new frequencies. Over a wide range of circumstances, the response of the medium is dominated by parametric four-wave mixing as compared to amplified spontaneous emission or stimulated electronic hyper-Raman scattering. Secondary four-wave-mixing fields are generated by stimulated Raman scattering of one parametric four-wave-mixing field and a coupling of these fields with the driving laser field. A sharp onset of saturation of the parametric four-wave-mixing signals with sodium number density and a transition from a quadratic to a linear power dependence is observed. Both effects are explained in terms of the two-photon cancellation effect.

Physical Review A•Jun 1, 1990•63 citations

Parametric processes and gain saturation in resonantly enhanced optical phase conjugation in Na vapor near a two-photon resonance

Reiner K. Wunderlich, W. R. Garrett, M. G. Payne

Conjugate wave generation has been studied in Na vapor near two‐photon resonance with the 4D state. Measurements of reflection gain at the laser frequency, stimulated Raman scattering, amplified spontaneous emission, and parametric four‐wave mixing intensities are used to delineate the role of parasitic processes in determining conjugate ‘‘reflection’’ gain profiles.

AIP conference proceedings•Jan 1, 1987•0 citations

The suppression of stimulated hyper-Raman emission in Na due to parametric four-wave mixing

Mary Anne Moore, W. R. Garrett, M. G. Payne

We show that an interference effect involving four‐wave mixing can almost totally suppress predicted examples of stimulated hyper‐Raman emission in the forward direction of a laser pump beam. The effect is demonstrated in Na vapor.

lase•Nov 1, 1987•0 citations
On the basis of combined experimental and theoretical studies of nonlinear processes associated with two‐photon excitations near 3d and 4d states in Na, we show how resonantly enhanced stimulated hyper‐Raman emission, parametric four‐wave mixing processes and total resonant two‐photon absorption can become severely suppressed through the actions of internally generated fields on the total atomic response in extended media.
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 3D and 4D 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.
When a principal atomic transition (dipole allowed from the ground state) is driven by odd- multi-photon excitation or by stimulated hyper-Raman scattering, a nonlinear multi-wave mixing field is generated at the transition frequency. A number of dramatic effects on such odd-photon mediated processes can ensue as a result of the internally generated wave-mixing fields. Excellent agreement between theory and experimental studies in Xe and in metal vapors is illustrated for a number of predicted effects including: suppression and strong shifting of resonance lines and hyper-Raman emissions under single and multi-laser excitation. We illustrate the dependence of the interference-related effects on pressure, oscillator strength, wavelength combination and relative propagation directions of pump laser beams. Contrary to most other nonlinear effects, we show that none of the features (in the semi-classical regime) depends on the intensity of the driving laser field.
The nonlinear response of sodium vapor with a laser tuned near the 4D two-photon resonance is investigated over a large range of sodium concentrations and pump intensities with emphasis on the influence of coherent cancellation effects on the induced polarizations and the primary mechanism for the generation of the new frequencies. Over a wide range of circumstances, the response of the medium is dominated by parametric four-wave mixing as compared to amplified spontaneous emission or stimulated electronic hyper-Raman scattering. Secondary four-wave-mixing fields are generated by stimulated Raman scattering of one parametric four-wave-mixing field and a coupling of these fields with the driving laser field. A sharp onset of saturation of the parametric four-wave-mixing signals with sodium number density and a transition from a quadratic to a linear power dependence is observed. Both effects are explained in terms of the two-photon cancellation effect.