Changes in the intensity fluctuations of a class of random electromagnetic beams on propagation

O. Korotkova

doi:10.1088/1464-4258/8/1/005

Changes in the intensity fluctuations of a class of random electromagnetic beams on propagation

O. Korotkova

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

We discuss fourth-order correlation properties of wide-sense statistically stationary, quasi-monochromatic, electromagnetic beams, assuming that the fluctuations in the electric field at any point are governed by Gaussian statistics. In particular, we derive expressions for the covariance function and for the contrast (scintillation index) of the fluctuating intensity of an electromagnetic Gaussian Schell-model beam, propagating in free space. For such beams we also derive expressions relating to fluctuations in the power and discuss the effects of transmitter and receiver aperture averaging. We show that the fluctuations of the intensity and of the power of the beam can be controlled by suitable choice of the states of coherence and of polarization of the source.

Original language	English (US)
Pages (from-to)	30-37
Number of pages	8
Journal	Journal of Optics A: Pure and Applied Optics
Volume	8
Issue number	1
DOIs	https://doi.org/10.1088/1464-4258/8/1/005
State	Published - Jan 1 2006
Externally published	Yes

Keywords

Contrast
Electromagnetic beams
Intensity fluctuations
Partially coherent beams
Polarization

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Access to Document

10.1088/1464-4258/8/1/005

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AB - We discuss fourth-order correlation properties of wide-sense statistically stationary, quasi-monochromatic, electromagnetic beams, assuming that the fluctuations in the electric field at any point are governed by Gaussian statistics. In particular, we derive expressions for the covariance function and for the contrast (scintillation index) of the fluctuating intensity of an electromagnetic Gaussian Schell-model beam, propagating in free space. For such beams we also derive expressions relating to fluctuations in the power and discuss the effects of transmitter and receiver aperture averaging. We show that the fluctuations of the intensity and of the power of the beam can be controlled by suitable choice of the states of coherence and of polarization of the source.

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KW - Polarization

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