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

Annual Meeting Optical Society of America

Effect of thermal light scattering fluctuations on two-wave mixing in optical Kerr media

Daniel N. Rogovin, Robert McGraw, Athanasios Gavrielides

Published Jan 1, 1988• 0 citations
Publisher

Abstract

Two-wave mixing, or coherent beam combination, is of considerable interest to the nonlinear optics and laser physics communities. One approach, of particular interest to this study, involves irradiating an optical Kerr media with two nondegenerate laser beams. The finite response time of the Kerr material ensures that any laser-induced grating will lag the interference pattern formed by the two nondegenerate laser beams and thereby allow energy transfer from the high-frequency beam to the low-frequency one. For such media, thermal light scattering fluctuations give rise to thermal noise gratings which can transfer energy from one wave to the other. Since such gratings are random in nature, their effect is to introduce fluctuations in the two-wave mixing process itself. We examine the influence of such thermal noise gratings on two-wave mixing and determine the SNR for this process in the nondepleted pump approximation.

DOI
10.1364/oam.1988.wm3

Related papers

Stochastic simulations of light-scattering noise in two-wave mixing: application to artificial Kerr media

Robert McGraw

This paper presents an examination of power dissipation in a nonlinear optical medium during the coherent transfer of energy from a pump to a signal beam, and quantitatively relates this dissipation (through the fluctuation-dissipation theorem) to the spectrum of thermal fluctuations that give rise to light-scattering noise. Calculations are presented for two-wave mixing in an artificial Kerr media using a powerful stochastic model for computer simulation of amplitude, phase, and intensity fluctuations due to light-scattering noise.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jun 1, 1991•0 citations

Role of thermal fluctuations in nondegenerate two-wave mixing

Daniel N. Rogovin, Robert M. McGraw, A. Gavrielides

The influence of thermal fluctuations on nondegenerate two-wave mixing in the nondepleted pump approximation is examined. For the specific case of an optical Kerr medium the spectrum of both amplitude and phase fluctuations as well as the signal-to-noise ratio are obtained. Detailed calculations suggest that a signal-to-noise ratio of order unity at argon-ion wavelengths and room temperatures requires a probe power of 15 μW in the strong signal regime.

Applied Physics Letters•Nov 6, 1989•11 citations

Stochastic models for light-scattering noise in nonlinear optical Kerr media

Robert M. McGraw

Thermal light-scattering fluctuations are examined as a fundamental noise source inherent in nonlinear optical processes involving Kerr and artificial Kerr media. Stochastic models are introduced to simulate noise in optical phase conjugation via degenerate four-wave mixing, and in signal amplification via nondegenerate two-wave-mixing processes. Significant noise fluctuations in the amplitude and phase components of the processed signals are shown to occur even with incident signal powers in the milliwatt range. For time-dependent processes, including nondegenerate two-wave mixing, the fluctuation-dissipation theorem is shown to generalize a previously derived static susceptibility relation between light-scattering and nonlinear optical response to media exhibiting both power dissipation and nonlocal interaction.

Physical Review A•Mar 1, 1992•3 citations

Measurements of light-intensity noise during nondegenerate two-wave mixing in a Kerr medium

R. Pizzoferrato, E. Pichini, Marco Marinelli +3 more

Measurements of light-intensity fluctuations have been carried out during cw nondegenerate two-wave mixing at visible wavelengths in an artificial Kerr medium. Taking advantage of the distinctive properties of artificial Kerr media, such as the high nonlinear efficiency and slow response, the zero-average component of optical noise has been revealed and completely characterized with regard to statistical and spectral features. Experimental results are discussed in the frame of a stochastic noise model including thermal fluctuations in the linear dielectric constant of the medium.

Physical Review A•Mar 1, 1994•1 citation

Noise in nonlinear optics

Robert M. McGraw, Daniel N. Rogovin

This paper examines thermal (light-scattering) fluctuations as a dominant noise source in nonlinear optical processes. Fundamental limits to conjugate wave fidelity and signal power requirement are obtained through the statistical thermodynamic treatment of light-scattering noise in four-wave mixing based on the fluctuation-dissipation theorem. Several types of nonlinear media are examined including artificial Kerr suspensions, isotropic Kerr media, and fluids near a critical point. Where measurements are available, excellent quantitative agreement is obtained between theory and experiment.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 1, 1990•0 citations

Time-delayed laser-induced double gratings

Xin Mi, Zuhe Yu, Qian Jiang +2 more

We have employed chaotic and phase-diffusion models to study the effect of laser coherence on time-delayed laser-induced double gratings (TDLIDG). It is found that, although the temporal behavior of the four-wave mixing signal depends on the stochastic properties of the lasers and the relaxation time of the grating, the modulation of the signal is always damped out when the relative time delay between two pump beams is much longer than the laser coherence time. We performed a TDLIDG experiment mediated by thermal effects to study the temporal behavior of the modulation, and we obtained the frequency difference between two light beams with an accuracy limited by the laser linewidth. We also studied the influence of the phase change in the optical path on TDLIDG.

Journal of the Optical Society of America B•Apr 1, 1993•19 citations
Two-wave mixing, or coherent beam combination, is of considerable interest to the nonlinear optics and laser physics communities. One approach, of particular interest to this study, involves irradiating an optical Kerr media with two nondegenerate laser beams. The finite response time of the Kerr material ensures that any laser-induced grating will lag the interference pattern formed by the two nondegenerate laser beams and thereby allow energy transfer from the high-frequency beam to the low-frequency one. For such media, thermal light scattering fluctuations give rise to thermal noise gratings which can transfer energy from one wave to the other. Since such gratings are random in nature, their effect is to introduce fluctuations in the two-wave mixing process itself. We examine the influence of such thermal noise gratings on two-wave mixing and determine the SNR for this process in the nondepleted pump approximation.
This paper presents an examination of power dissipation in a nonlinear optical medium during the coherent transfer of energy from a pump to a signal beam, and quantitatively relates this dissipation (through the fluctuation-dissipation theorem) to the spectrum of thermal fluctuations that give rise to light-scattering noise. Calculations are presented for two-wave mixing in an artificial Kerr media using a powerful stochastic model for computer simulation of amplitude, phase, and intensity fluctuations due to light-scattering noise.
Thermal light-scattering fluctuations are examined as a fundamental noise source inherent in nonlinear optical processes involving Kerr and artificial Kerr media. Stochastic models are introduced to simulate noise in optical phase conjugation via degenerate four-wave mixing, and in signal amplification via nondegenerate two-wave-mixing processes. Significant noise fluctuations in the amplitude and phase components of the processed signals are shown to occur even with incident signal powers in the milliwatt range. For time-dependent processes, including nondegenerate two-wave mixing, the fluctuation-dissipation theorem is shown to generalize a previously derived static susceptibility relation between light-scattering and nonlinear optical response to media exhibiting both power dissipation and nonlocal interaction.
Measurements of light-intensity fluctuations have been carried out during cw nondegenerate two-wave mixing at visible wavelengths in an artificial Kerr medium. Taking advantage of the distinctive properties of artificial Kerr media, such as the high nonlinear efficiency and slow response, the zero-average component of optical noise has been revealed and completely characterized with regard to statistical and spectral features. Experimental results are discussed in the frame of a stochastic noise model including thermal fluctuations in the linear dielectric constant of the medium.
This paper examines thermal (light-scattering) fluctuations as a dominant noise source in nonlinear optical processes. Fundamental limits to conjugate wave fidelity and signal power requirement are obtained through the statistical thermodynamic treatment of light-scattering noise in four-wave mixing based on the fluctuation-dissipation theorem. Several types of nonlinear media are examined including artificial Kerr suspensions, isotropic Kerr media, and fluids near a critical point. Where measurements are available, excellent quantitative agreement is obtained between theory and experiment.
We have employed chaotic and phase-diffusion models to study the effect of laser coherence on time-delayed laser-induced double gratings (TDLIDG). It is found that, although the temporal behavior of the four-wave mixing signal depends on the stochastic properties of the lasers and the relaxation time of the grating, the modulation of the signal is always damped out when the relative time delay between two pump beams is much longer than the laser coherence time. We performed a TDLIDG experiment mediated by thermal effects to study the temporal behavior of the modulation, and we obtained the frequency difference between two light beams with an accuracy limited by the laser linewidth. We also studied the influence of the phase change in the optical path on TDLIDG.