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

Optics and Spectroscopy

Influence of the scattering matrix elements on the gain of Stokes and anti-Stokes components in the nonstationary regime

I. A. Kulagin, Timurbek Usmanov

Published Jan 1, 2001• 0 citations
Publisher

Abstract

The influence of the scattering matrix elements that are responsible for the amplification of the Stokes and anti-Stokes components on the process of stimulated Raman scattering in the essentially nonstationary regime is analyzed. It is demonstrated that the optimum proportion between the scattering matrix elements, which maximizes the anti-Stokes component, is determined by the ratio between the optical frequencies of the components and the initial proportion between the intensities of the pump and initiating pulses. In the case of the optimum proportion between the scattering matrix elements, the variation in the excitation of a medium compensates the self-induced modulation of gain, and the efficiency of converting the radiation energy into the Stokes and anti-Stokes components increases substantially.

DOI
10.1134/1.1343554

Related papers

Scattering matrix element influence on essentially transient amplification of Stokes and anti-Stokes pulses

I. A. Kulagin, Usman K. Sapaev, Timurbek Usmanov

Influence of relation between scattering matrix elements responsible for Stokes and anti-Stokes pulse amplification on efficiency of the energy exchange and character of self- induced amplitude-phase modulation is analyzed in the essentially transient regime.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jan 28, 1999•0 citations

Efficiency of anti-Stokes generation in nonstationary stimulated Raman scattering

N. I. Shamrov

Nonstationary SRS equations are solved analytically for short samples in the approximation of a prescribed exciting field, and numerically for a longer medium taking into account the pumping depletion. The dependence of the energy of Stokes and anti-Stokes waves on their spatial mismatching is studied. The optimal angle of anti-Stokes generation is determined as a function of the length of the system, pump pulse energy, and the rate of transverse relaxation.

Quantum Electronics•Nov 30, 2001•0 citations

Correlation between Stokes and anti-Stokes radiation and the effect of phase modulation in stimulated Raman scattering of ultrashort pulses in a dispersive medium

Joachım Herrmann

A calculation is made of the intensity of the Stokes radiation in the stimulated Raman scattering of ultrashort light pulses in a dispersive medium employing the asymptotic approximation for arbitrary modulation of the amplitude and phase of the pump pulse. Particular attention was paid to the effect of phase modulation on the stimulated Raman scattering. Calculations were also made of the intensity of the anti-Stokes component in the scattering of an ultrashort pulse in a dispersive medium and of the optimal angle for the observation of the anti-Stokes rings.

Soviet Journal of Quantum Electronics•Aug 31, 1977•1 citation

A model of nonstationary backward stimulated Raman scattering in an extended system: Interaction of forward and backward Stokes waves

N. I. Shamrov

A semiclassical model of nonstationary stimulated Raman scattering with account of forward and backward waves of different frequencies is proposed. Equations for the elements of a collective density matrix and electric-field amplitudes are obtained applying the averaging method. It is shown that forward waves are generated by a united polarization component, whereas each of the backward waves is formed by its own component. The description is based on the approximation of small scattering angles and assumes that the quantities considered do not depend on transverse coordinates. The emission dynamics of forward-backward Stokes pulses is investigated both for the linear case and under the strong depletion of pumping and level populations. The domain of applicability of the model of nonstationary forward stimulated Raman scattering is determined.

Optics and Spectroscopy•Oct 1, 2008•2 citations

Stabilisation of emission in the first Stokes component of stimulated Raman scattering in the nonlinear regime

N. I. Shamrov

Equations of coherent stimulated Raman scattering were solved analytically for samples of length smaller than the wavelength of incident radiation, and numerically for extended media. The energy distribution function of Stokes pulses was determined. Transition from the linear regime of stimulated Raman scattering to the nonlinear regime was studied. The intensity of the first Stokes component was shown to be stable in the case of saturated amplification of spontaneous emission.

Quantum Electronics•Mar 31, 2000•4 citations

Characteristics of stimulated Raman scattering in the presence of spatial degeneracy of levels

Yu A Il'inskiĭ, Vladimir D Taranukhin

A theoretical analysis is made of the stimulated Raman scattering in gases in the presence of spatial degeneracy of the energy levels. Saturation of the population difference and influence of anti-Stokes radiation are allowed for. Various polarizations of the pump fields and of the Stokes and anti-Stokes radiation are considered. It is shown that the profile of the stimulated Raman line is generally a sum of three Lorentzian lines and the scattering includes scalar, symmetric, and antisymmetric components. The use of circularly polarized pump radiation suppresses the influence of anti-Stokes radiation on the gain of the Stokes wave.

Soviet Journal of Quantum Electronics•Feb 28, 1974•3 citations
The influence of the scattering matrix elements that are responsible for the amplification of the Stokes and anti-Stokes components on the process of stimulated Raman scattering in the essentially nonstationary regime is analyzed. It is demonstrated that the optimum proportion between the scattering matrix elements, which maximizes the anti-Stokes component, is determined by the ratio between the optical frequencies of the components and the initial proportion between the intensities of the pump and initiating pulses. In the case of the optimum proportion between the scattering matrix elements, the variation in the excitation of a medium compensates the self-induced modulation of gain, and the efficiency of converting the radiation energy into the Stokes and anti-Stokes components increases substantially.
A calculation is made of the intensity of the Stokes radiation in the stimulated Raman scattering of ultrashort light pulses in a dispersive medium employing the asymptotic approximation for arbitrary modulation of the amplitude and phase of the pump pulse. Particular attention was paid to the effect of phase modulation on the stimulated Raman scattering. Calculations were also made of the intensity of the anti-Stokes component in the scattering of an ultrashort pulse in a dispersive medium and of the optimal angle for the observation of the anti-Stokes rings.
A semiclassical model of nonstationary stimulated Raman scattering with account of forward and backward waves of different frequencies is proposed. Equations for the elements of a collective density matrix and electric-field amplitudes are obtained applying the averaging method. It is shown that forward waves are generated by a united polarization component, whereas each of the backward waves is formed by its own component. The description is based on the approximation of small scattering angles and assumes that the quantities considered do not depend on transverse coordinates. The emission dynamics of forward-backward Stokes pulses is investigated both for the linear case and under the strong depletion of pumping and level populations. The domain of applicability of the model of nonstationary forward stimulated Raman scattering is determined.
A theoretical analysis is made of the stimulated Raman scattering in gases in the presence of spatial degeneracy of the energy levels. Saturation of the population difference and influence of anti-Stokes radiation are allowed for. Various polarizations of the pump fields and of the Stokes and anti-Stokes radiation are considered. It is shown that the profile of the stimulated Raman line is generally a sum of three Lorentzian lines and the scattering includes scalar, symmetric, and antisymmetric components. The use of circularly polarized pump radiation suppresses the influence of anti-Stokes radiation on the gain of the Stokes wave.