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Soviet Journal of Quantum Electronics

Coherent interaction of radiation pulses with resonant multilevel media (review)

Leonid A Bol'shov, Vladimir V. Likhanskii

Published Jul 31, 1985• 20 citations
Publisher

Abstract

A review is given of recent theoretical investigations on coherent propagation and nonlinear interaction of multifrequency ultrashort radiation pulses in resonantly absorbing media. An analysis is made of frequency conversion by parametric interaction and stimulated Raman scattering of laser pulses in resonant three-level media. New ways of controlling the parameters of coherent pulses and the use of multifrequency pulses in the spectroscopy of multilevel media are discussed. The experimental capabilities of the investigated effects are considered.

DOI
10.1070/qe1985v015n07abeh007277

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A review is given of recent theoretical investigations on coherent propagation and nonlinear interaction of multifrequency ultrashort radiation pulses in resonantly absorbing media. An analysis is made of frequency conversion by parametric interaction and stimulated Raman scattering of laser pulses in resonant three-level media. New ways of controlling the parameters of coherent pulses and the use of multifrequency pulses in the spectroscopy of multilevel media are discussed. The experimental capabilities of the investigated effects are considered.
A review is given of the investigations of the coherent interaction of light pulses with resonantly absorbing two-level media. An analysis is made of the self-induced transparency discovered by McCall and Hahn and of its importance in quantum electronics. Bleached states associated with the phase modulation are considered in detail. A comparison is made with the theory of nonlinear waves of different physical origin. A review is given of some possible physical applications associated with the discriminatory nature of the transmission and delay of light in the self-induced transparency effect.
(Submitted 14 February 1986) Zh. Eksp. Teor. Fiz. 92,46-55 (January 1987) The coherent resonant interaction between multifrequency light and a multilevel system is considered together with the N-wave interaction of wave packets in a medium with a quadratic nonlinearity. The Lax representation of the self-consistent set of Maxwell-Bloch equations for this interaction is found. Soliton solutions resulting from the parametric transformation of ultrashort pulses in three- and four-level system (N = 3, and N
This part of the review deals with coherent effects in the interaction of ultrashort light pulses with media characterized by degenerate transitions, including semiconducting media (in the direct band-band transition region), and with media exhibiting two-photon resonances. It is shown that the self-induced transparency can appear under such conditions and the properties of this effect are studied. A review is made of experimental investigations of the coherent bleaching of various media. The paper ends with a list of the most urgent problems requiring clarification.
An analysis is made of the propagation of a short coherent optical pulse in a three-level resonant medium with an essentially nonequidistant spectrum as a function of the degree of preexcitation of the medium. It is found that in addition to self-induced transparency and resonance scattering, stimulated Raman scattering (Stokes or anti-Stokes) should be observed under certain spatial phase-matching conditions. The area theorem is formulated for all radiation components. An analysis is made of the case of propagation of a resonant electromagnetic pulse of frequency ω in a system of three-level atoms having an equidistant spectrum. Under conditions of preexcitation of the medium at the frequency 2ω by longitudinal acoustic pulses, a scattered transverse acoustic wave at the frequency ω may be observed.