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

Propagation of phase-modulated coherent radiation pulses in resonant media

Vladimir D Taranukhin, Sergey Y. Ten

Published Sep 30, 1990• 0 citations
Publisher

Abstract

A theoretical analysis is made of the propagation of phase-modulated laser pulses in a resonant two-level medium. It is shown that phase modulation results in the appearance of qualitatively new amplification (absorption) regimes. In one of these regimes, trains of ultrashort pulses may be generated at a high repetition frequency. An analysis is also made of the feasibility of compression of amplified pulses.

DOI
10.1070/qe1990v020n09abeh007406

Related papers

Investigation of the amplification of ultrashort light pulses in three-level resonant systems

Leonid A Bol'shov, Nickolai N. Elkin, T. K. Kirichenko +2 more

An analysis is made of simultaneous propagation of pulses of different frequencies in many-level resonantly amplifying and absorbing media. Analytic expressions are obtained for the envelopes of fields in the case of propagation of two-frequency radiation in a three-level medium with a common lower level. Self-similar equations are obtained for the radiation propagating in an amplifying medium; in certain special cases, these equations are identical with those considered earlier.

Soviet Journal of Quantum Electronics•Jul 31, 1982•5 citations

Phase modulation and parametric broadening of the spectrum of a pulse in a two-level resonant medium

Grigorii G Grigoryan, A. O. Melikyan

An analytic solution is obtained for the self-consistent equations describing propagation of an ultrashort pulse in a resonant two-level medium. The first approximation in respect of the dispersion is used to allow for phase modulation and for the dependence of the group velocity on the intensity and on the running value of the frequency. The conditions for the formation of a shock wave are established. It is shown that asymmetric broadening of the spectrum of a pulse results in coherent absorption, as a result of which the propagation of this pulse in such a medium leaves behind a polarization at the atomic transition frequency responsible for the radiation represented by the pulse.

Soviet Journal of Quantum Electronics•Dec 31, 1986•0 citations

Change in the shape of frequency-modulated light pulses during amplification

E G Lariontsev, V. N. Serkin

An analysis is made of the propagation of a frequency-modulated light pulse in a linearly amplifying medium with an inhomogeneously broadened gain profile. It is shown that a pulse can be compressed considerably during amplification. Conditions are established under which strong distortions of the pulse shape may result in its splitting. An analysis is made of the influence of the phase self-modulation of radiation on the shape of ultrashort light pulses in oscillators and amplifiers.

Soviet Journal of Quantum Electronics•Jun 30, 1976•1 citation

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

Leonid A Bol'shov, Vladimir V. Likhanskii

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.

Soviet Journal of Quantum Electronics•Jul 31, 1985•20 citations

Influence of propagation on the coherent accumulation of excitation induced by an ultrashort pulse train

Antônio Augusto Soares, Luı́s E. E. de Araujo

We study the effects of propagation through an extended sample of two- and three-level atoms on the coherent accumulation of excitation by an ultrashort pulse train. In the two-level case, previous pulses in the train may prepare the medium such that a later pulse may experience amplification and absorption in different positions inside the sample. For a large number of pulses, the atomic medium may be saturated by the train, and some pulses propagate without experiencing either absorption or amplification. In general, absorption of the resonant pulse frequency during propagation compromises the accumulation efficiency. In the three-level case, the coherent accumulation of excitation leads to electromagnetically induced transparency of the pulse train, and the pulses exit the medium without any distortion in their temporal profile.

Physical Review A•Jul 29, 2009•10 citations

Propagation and amplification of ultrashort light pulses in a resonant two-level medium: finite-difference time-domain analysis

A.V. Tarasishin, Sergey A. Magnitskii, Aleksei M. Zheltikov

Propagation and amplification of an ultrashort laser pulse in a two-level medium is numerically investigated with the use of the finite-difference time-domain (FDTD) procedure simultaneously solving Maxwell and Schrodinger equations with no assumptions characteristic of slowly varying envelope approximation. Comparison of the results of FDTD numerical simulations with the predictions of the pulse area theorem has demonstrated that the developed numerical procedure provides an adequate description of pulse evolution in a two-level medium. Amplification of ultrashort light pulses in a two-level medium is analyzed. Two methods of improving the gain of ultrashort pulses in a two-level medium by modulating the spatial distribution of dipole moments of resonant transitions and using initially chirped frequency-detuned pulses are explored.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 31, 2002•0 citations
A theoretical analysis is made of the propagation of phase-modulated laser pulses in a resonant two-level medium. It is shown that phase modulation results in the appearance of qualitatively new amplification (absorption) regimes. In one of these regimes, trains of ultrashort pulses may be generated at a high repetition frequency. An analysis is also made of the feasibility of compression of amplified pulses.
An analytic solution is obtained for the self-consistent equations describing propagation of an ultrashort pulse in a resonant two-level medium. The first approximation in respect of the dispersion is used to allow for phase modulation and for the dependence of the group velocity on the intensity and on the running value of the frequency. The conditions for the formation of a shock wave are established. It is shown that asymmetric broadening of the spectrum of a pulse results in coherent absorption, as a result of which the propagation of this pulse in such a medium leaves behind a polarization at the atomic transition frequency responsible for the radiation represented by the pulse.
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.
We study the effects of propagation through an extended sample of two- and three-level atoms on the coherent accumulation of excitation by an ultrashort pulse train. In the two-level case, previous pulses in the train may prepare the medium such that a later pulse may experience amplification and absorption in different positions inside the sample. For a large number of pulses, the atomic medium may be saturated by the train, and some pulses propagate without experiencing either absorption or amplification. In general, absorption of the resonant pulse frequency during propagation compromises the accumulation efficiency. In the three-level case, the coherent accumulation of excitation leads to electromagnetically induced transparency of the pulse train, and the pulses exit the medium without any distortion in their temporal profile.
Propagation and amplification of an ultrashort laser pulse in a two-level medium is numerically investigated with the use of the finite-difference time-domain (FDTD) procedure simultaneously solving Maxwell and Schrodinger equations with no assumptions characteristic of slowly varying envelope approximation. Comparison of the results of FDTD numerical simulations with the predictions of the pulse area theorem has demonstrated that the developed numerical procedure provides an adequate description of pulse evolution in a two-level medium. Amplification of ultrashort light pulses in a two-level medium is analyzed. Two methods of improving the gain of ultrashort pulses in a two-level medium by modulating the spatial distribution of dipole moments of resonant transitions and using initially chirped frequency-detuned pulses are explored.