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Title: Deformation of the signal envelope due to a strong dispersion of the refractive index in the gain region

Abstract

It is shown that, when a narrow-band signal with a non-Gaussian envelope propagates in a medium with a strong dispersion, the signal envelope being distorted due to the dispersion of the gain (or) absorption in the medium. Nevertheless, the amplitude-modulated signal having a symmetric (even) intensity envelope remains the same. The propagation velocity of the 'middle point' (i.e., the symmetry centre) of the signal coincides with the real group velocity of the wave with a given carrier frequency in the medium and can be subluminal, superluminal or negative. Therefore, the concept of a real group velocity (including the superluminal or negative velocity) is also applicable in media with a strong dispersion of the gain (or absorption). (interaction of laser radiation with matter. laser plasma)

Authors:
 [1]
  1. Samara State Architecture and Building Academy, Samara (Russian Federation)
Publication Date:
OSTI Identifier:
21470471
Resource Type:
Journal Article
Journal Name:
Quantum Electronics (Woodbury, N.Y.)
Additional Journal Information:
Journal Volume: 34; Journal Issue: 2; Other Information: DOI: 10.1070/QE2004v034n02ABEH002595; Journal ID: ISSN 1063-7818
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; AMPLITUDES; CARRIERS; FREQUENCY MODULATION; GAIN; LASER RADIATION; REFRACTIVE INDEX; SIGNAL DISTORTION; SIGNALS; SYMMETRY; VELOCITY; AMPLIFICATION; ELECTROMAGNETIC RADIATION; MODULATION; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; SORPTION

Citation Formats

Bukhman, N S. Deformation of the signal envelope due to a strong dispersion of the refractive index in the gain region. United States: N. p., 2004. Web. doi:10.1070/QE2004V034N02ABEH002595.
Bukhman, N S. Deformation of the signal envelope due to a strong dispersion of the refractive index in the gain region. United States. doi:10.1070/QE2004V034N02ABEH002595.
Bukhman, N S. Sat . "Deformation of the signal envelope due to a strong dispersion of the refractive index in the gain region". United States. doi:10.1070/QE2004V034N02ABEH002595.
@article{osti_21470471,
title = {Deformation of the signal envelope due to a strong dispersion of the refractive index in the gain region},
author = {Bukhman, N S},
abstractNote = {It is shown that, when a narrow-band signal with a non-Gaussian envelope propagates in a medium with a strong dispersion, the signal envelope being distorted due to the dispersion of the gain (or) absorption in the medium. Nevertheless, the amplitude-modulated signal having a symmetric (even) intensity envelope remains the same. The propagation velocity of the 'middle point' (i.e., the symmetry centre) of the signal coincides with the real group velocity of the wave with a given carrier frequency in the medium and can be subluminal, superluminal or negative. Therefore, the concept of a real group velocity (including the superluminal or negative velocity) is also applicable in media with a strong dispersion of the gain (or absorption). (interaction of laser radiation with matter. laser plasma)},
doi = {10.1070/QE2004V034N02ABEH002595},
journal = {Quantum Electronics (Woodbury, N.Y.)},
issn = {1063-7818},
number = 2,
volume = 34,
place = {United States},
year = {2004},
month = {2}
}