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Title: Focused Bessel beams

Abstract

The diffraction broadening of a focused beam with a Bessel amplitude distribution is examined. Calculations are reported not only of the traditional differential characteristics (radial distributions of the electric-energy densities and of the axial total electromagnetic energy flux in the beam), but also of integral quantities characterising the degree of transverse localisation of the radiation in a tube of specified radius within the beam. It is shown that in a large-aperture Bessel beam only a very small fraction of the total beam power is concentrated in its central core and that a focal point is also observed on intense focusing of the Bessel beam. This spot is not in the geometric-optical focal plane but is displaced from the latter by a certain distance. (laser applications and other topics in quantum electronics)

Authors:
 [1]
  1. Institute of Physics, Tartu (Estonia)
Publication Date:
OSTI Identifier:
21448359
Resource Type:
Journal Article
Journal Name:
Quantum Electronics (Woodbury, N.Y.)
Additional Journal Information:
Journal Volume: 30; Journal Issue: 4; Other Information: DOI: 10.1070/QE2000v030n04ABEH001726; Journal ID: ISSN 1063-7818
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; APERTURES; BEAMS; DIFFRACTION; ELECTROMAGNETIC RADIATION; ENERGY DENSITY; FOCUSING; GEOMETRY; SPATIAL DISTRIBUTION; COHERENT SCATTERING; DISTRIBUTION; MATHEMATICS; OPENINGS; RADIATIONS; SCATTERING

Citation Formats

Adamson, P V. Focused Bessel beams. United States: N. p., 2000. Web. doi:10.1070/QE2000V030N04ABEH001726.
Adamson, P V. Focused Bessel beams. United States. doi:10.1070/QE2000V030N04ABEH001726.
Adamson, P V. Sun . "Focused Bessel beams". United States. doi:10.1070/QE2000V030N04ABEH001726.
@article{osti_21448359,
title = {Focused Bessel beams},
author = {Adamson, P V},
abstractNote = {The diffraction broadening of a focused beam with a Bessel amplitude distribution is examined. Calculations are reported not only of the traditional differential characteristics (radial distributions of the electric-energy densities and of the axial total electromagnetic energy flux in the beam), but also of integral quantities characterising the degree of transverse localisation of the radiation in a tube of specified radius within the beam. It is shown that in a large-aperture Bessel beam only a very small fraction of the total beam power is concentrated in its central core and that a focal point is also observed on intense focusing of the Bessel beam. This spot is not in the geometric-optical focal plane but is displaced from the latter by a certain distance. (laser applications and other topics in quantum electronics)},
doi = {10.1070/QE2000V030N04ABEH001726},
journal = {Quantum Electronics (Woodbury, N.Y.)},
issn = {1063-7818},
number = 4,
volume = 30,
place = {United States},
year = {2000},
month = {4}
}