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

Soviet Journal of Quantum Electronics

Reflection efficiency in a wavefront reversal system using four-wave interaction with a passive optical polarization isolator at 10.6μ

Valeri I. Kovalev, K. V. Kovalenko, M. B. Suvorov, A. K. Shmelev

Published Sep 30, 1986• 2 citations
Publisher

Abstract

A simple optical polarization isolator (OPI) was developed for wavefront reversal systems operating at 10.6 μ . Its decoupling efficiency was up to 16 dB. An experimental investigation was made of the influence of the change in the polarization state of the second reference wave introduced by the OPI on the reflection efficiency under conditions of a four-wave interaction in InAs and SF 6 . Partial dispersal of the grating recorded by the signal and opposite reference waves was due to the diffusion of free electrons in InAs.

DOI
10.1070/qe1986v016n09abeh007378

Related papers

Reflection of a multifrequency signal in four-wave interaction in germanium at 10.6μ

Nicolai G. Basov, Boris Ya Zel'dovich, Valeri I. Kovalev +2 more

An investigation is made of the reflection of a mulitfrequency signal in connection with wavefront reversal in four-wave interaction. When the signal and reference waves are generated by a single source and their optical paths are matched, it has been established experimentally and theoretically that if the length of the medium is greater than the coherence length, the reflection efficiency is the same as that for monochromatic waves of the same intensity. For a short medium, fluctuations of the intensity of many nonphase-matched spectral components should increase the reflection efficiency up to sixfold.

Soviet Journal of Quantum Electronics•Apr 30, 1981•4 citations

Influence of linear absorption and reflection on the characteristics of four-wave wavefront reversal

Boris Ya Zel'dovich, Tatiana Victorovna Yakovleva

An analysis is made of the theory of four-wave wavefront reversal allowing for linear absorption and reflection of all the interacting waves from a mirror which forms a second reference wave from the first incident wave. The Born approximation is used to find the optimum thickness of the nonlinear medium giving the maximum reversal coefficient. Conditions for parametric four-wave oscillation with an arbitrary frequency shift are determined and the dependence of the threshold intensity of the incident reference wave on the linear reflection coefficient of the wave-forming mirror is found for a given thickness of the medium in the absence of absorption.

Soviet Journal of Quantum Electronics•Sep 30, 1981•2 citations

Degenerate four-wave interaction in a resonant medium allowing for variation of the pump waves

Alexander A. Betin, A. I. Dyatlov, S. N. Kulagina +2 more

A theoretical analysis is made of the efficiency of wavefront reversal under conditions of a degenerate form of the four-wave interaction in a resonantly absorbing (amplifying) medium allowing for changes in the pump waves as a result of their natural resonant absorption (amplification). The coefficient of reflection into a reversed wave is obtained as a function of the optical thickness of a layer of the medium, the boundary values of the pump wave intensity, and the shift of the field frequency from the line center. The optimal values of these parameters and the corresponding maximum reflection coefficient are determined.

Soviet Journal of Quantum Electronics•Oct 31, 1986•3 citations

Quality of wavefront reversal of multifrequency radiation by four-wave interaction

A. I. Erokhin, Valeri I. Kovalev, П. А. Михеев +1 more

It is shown experimentally that broadening of the frequency spectrum of waves participating in four-wave interaction in a system with exactly counterpropagating reference waves results in an angular spread of the reflected radiation and thus causes a deterioration in the wavefront reversal quality. The angular spread is proportional to the angle of convergence of the signal and the parallel pump wave and to the width of the emission spectrum.

Soviet Journal of Quantum Electronics•Jan 31, 1985•1 citation

Wavefront reversal of optical radiation using feedback in four-wave interaction

Igor' M Bel'dyugin, Michail G. Galushkin, E M Zemskov

A theoretical analysis is made of wavefront reversal which is not sensitive to the optical quality of the nonlinear wavefront-reversing medium when complex-conjugate reference waves are formed spontaneously. An investigation is made of the linear and nonlinear stages of reversed wave generation in various nonlinear media using feedback in degenerate and nondegenerate four-wave interaction. It is shown that in nonamplifying nonlinear media this method can only be achieved by additional amplification of the radiation reflected from the nonlinear medium.

Soviet Journal of Quantum Electronics•May 31, 1984•43 citations

Self-reversal of the wavefront of high-power radiation in a light-induced four-wave interaction in a resonant medium

Pavel A Apanasevich, Anatolii A Afanas'ev, S. Ya. Kilin

A wavefront reversal system is proposed for high-power optical radiation. This system is based on a resonant four-wave interaction without recourse to external pump waves. Stimulated scattering of the wave being reversed in a resonant medium placed inside a resonator creates two opposite pump waves and a parametric interaction between them generates reversed radiation. The efficiency of such self-reversal is comparable with the efficiency of conventional wavefront reversal as a result of a four-wave interaction in nonresonant media with a phase nonlinearity and it may reach 10 −3 .

Soviet Journal of Quantum Electronics•Apr 30, 1985•1 citation
A simple optical polarization isolator (OPI) was developed for wavefront reversal systems operating at 10.6 μ . Its decoupling efficiency was up to 16 dB. An experimental investigation was made of the influence of the change in the polarization state of the second reference wave introduced by the OPI on the reflection efficiency under conditions of a four-wave interaction in InAs and SF 6 . Partial dispersal of the grating recorded by the signal and opposite reference waves was due to the diffusion of free electrons in InAs.
An investigation is made of the reflection of a mulitfrequency signal in connection with wavefront reversal in four-wave interaction. When the signal and reference waves are generated by a single source and their optical paths are matched, it has been established experimentally and theoretically that if the length of the medium is greater than the coherence length, the reflection efficiency is the same as that for monochromatic waves of the same intensity. For a short medium, fluctuations of the intensity of many nonphase-matched spectral components should increase the reflection efficiency up to sixfold.
An analysis is made of the theory of four-wave wavefront reversal allowing for linear absorption and reflection of all the interacting waves from a mirror which forms a second reference wave from the first incident wave. The Born approximation is used to find the optimum thickness of the nonlinear medium giving the maximum reversal coefficient. Conditions for parametric four-wave oscillation with an arbitrary frequency shift are determined and the dependence of the threshold intensity of the incident reference wave on the linear reflection coefficient of the wave-forming mirror is found for a given thickness of the medium in the absence of absorption.
A theoretical analysis is made of the efficiency of wavefront reversal under conditions of a degenerate form of the four-wave interaction in a resonantly absorbing (amplifying) medium allowing for changes in the pump waves as a result of their natural resonant absorption (amplification). The coefficient of reflection into a reversed wave is obtained as a function of the optical thickness of a layer of the medium, the boundary values of the pump wave intensity, and the shift of the field frequency from the line center. The optimal values of these parameters and the corresponding maximum reflection coefficient are determined.
A theoretical analysis is made of wavefront reversal which is not sensitive to the optical quality of the nonlinear wavefront-reversing medium when complex-conjugate reference waves are formed spontaneously. An investigation is made of the linear and nonlinear stages of reversed wave generation in various nonlinear media using feedback in degenerate and nondegenerate four-wave interaction. It is shown that in nonamplifying nonlinear media this method can only be achieved by additional amplification of the radiation reflected from the nonlinear medium.
A wavefront reversal system is proposed for high-power optical radiation. This system is based on a resonant four-wave interaction without recourse to external pump waves. Stimulated scattering of the wave being reversed in a resonant medium placed inside a resonator creates two opposite pump waves and a parametric interaction between them generates reversed radiation. The efficiency of such self-reversal is comparable with the efficiency of conventional wavefront reversal as a result of a four-wave interaction in nonresonant media with a phase nonlinearity and it may reach 10 −3 .