Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 6 of 6
Full-Text Articles in Physics
Changes In The Statistical Properties Of Stochastic Anisotropic Electromagnetic Beams On Propagation In The Turbulent Atmosphere, Xinyue Du, Daomu Zhao, Olga Korotkova
Changes In The Statistical Properties Of Stochastic Anisotropic Electromagnetic Beams On Propagation In The Turbulent Atmosphere, Xinyue Du, Daomu Zhao, Olga Korotkova
Physics Articles and Papers
We report analytic formulas for the elements of the e 2 X 2 cross-spectral density matrix of a stochastic electromagnetic anisotropic beam propagating through the turbulent atmosphere with the help of vector integration. From these formulas the changes in the spectral density (spectrum), in the spectral degree of polarization, and in the spectral degree of coherence of such a beam on propagation are determined. As an example, these quantities are calculated for a so-called anisotropic electromagnetic Gaussian Schell-model beam propagating in the isotropic and homogeneous atmosphere. In particular, it is shown numerically that for a beam of this class, unlike …
Application Of Correlation-Induced Spectral Changes To Inverse Scattering, Daomu Zhao, Olga Korotkova, Emil Wolf
Application Of Correlation-Induced Spectral Changes To Inverse Scattering, Daomu Zhao, Olga Korotkova, Emil Wolf
Physics Articles and Papers
It is shown how the phenomenon of correlation-induced spectral changes generated on scattering of a polychromatic plane wave on a spatially homogeneous random medium may be used to determine the correlation function of the scattering potential of the medium.
Angular Spectrum Representation For Propagation Of Random Electromagnetic Beams In A Turbulent Atmosphere, Olga Korotkova, Greg Gbur
Angular Spectrum Representation For Propagation Of Random Electromagnetic Beams In A Turbulent Atmosphere, Olga Korotkova, Greg Gbur
Physics Articles and Papers
The combination of an angular spectrum representation (in the space-frequency domain) and the second-order Rytov perturbation theory is applied for description of the second-order statistical properties of arbitrary (coherent and partially coherent) stochastic electromagnetic beamlike fields that propagate in a turbulent atmosphere. In particular, we derive the expressions for the elements of the cross-spectral density matrix of the beam, from which its spectral, coherence, and polarization properties can be found. We illustrate the method by applying it to the propagation of several electromagnetic model beams through the atmosphere.
Beam Criterion For Atmospheric Propagation, Olga Korotkova, Emil Wolf
Beam Criterion For Atmospheric Propagation, Olga Korotkova, Emil Wolf
Physics Articles and Papers
A criterion is introduced for testing whether a beam retains its beam-like form after it propagates any particular distance through the turbulent atmosphere. The criterion applies to monochromatic as well as to partially coherent beams and is illustrated by examples.
Definitions Of The Degree Of Polarization Of A Light Beam, Asma Al-Qasimi, Olga Korotkova, Daniel James, Emil Wolf
Definitions Of The Degree Of Polarization Of A Light Beam, Asma Al-Qasimi, Olga Korotkova, Daniel James, Emil Wolf
Physics Articles and Papers
A necessary and sufficient condition is derived for certain ad hoc expressions that are frequently used in the literature to represent correctly the degree of polarization of a light beam.
Angular Spectrum Representation For The Propagation Of Arbitrary Coherent And Partially Coherent Beams Through Atmospheric Turbulence, Greg Gbur, Olga Korotkova
Angular Spectrum Representation For The Propagation Of Arbitrary Coherent And Partially Coherent Beams Through Atmospheric Turbulence, Greg Gbur, Olga Korotkova
Physics Articles and Papers
An angular spectrum representation is applied for a description of statistical properties of arbitrary beamlike fields propagating through atmospheric turbulence. The Rytov theory is used for the characterization of the perturbation of the field by the atmosphere. In particular, we derive expressions for the cross-spectral density of a coherent and a partially coherent beam of arbitrary type in the case when the power spectrum of atmospheric fluctuations is described by the von Karman model. We illustrate the method by applying it to the propagation of several model beams through the atmosphere.