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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 12 — Jun. 7, 2010
  • pp: 12587–12598

Propagation factor of a stochastic electromagnetic Gaussian Schell-model beam

Shijun Zhu, Yangjian Cai, and Olga Korotkova  »View Author Affiliations


Optics Express, Vol. 18, Issue 12, pp. 12587-12598 (2010)
http://dx.doi.org/10.1364/OE.18.012587


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Abstract

Analytical formula is derived for the propagation factor (known as M 2 -factor) of a stochastic electromagnetic Gaussian Schell-model (EGSM) beam in free space and in turbulent atmosphere. In free space, the M 2 -factor of an EGSM beam is mainly determined by its initial degree of polarization, r.m.s. widths of the spectral densities and correlation coefficients, and its value remains invariant on propagation. In turbulent atmosphere, the M 2 -factor of an EGSM beam is also determined by the parameters of the turbulent atmosphere, and its value increases on propagation. The relative M 2 -factor of an EGSM beam with lower correlation factors, larger r.m.s. widths of the spectral densities and longer wavelength is less affected by the atmospheric turbulence. Under suitable conditions, an EGSM beam is less affected by the atmospheric turbulence than a scalar GSM beam (i.e. fully polarized GSM beam). Our results will be useful in long-distance free-space optical communications.

© 2010 OSA

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(030.0030) Coherence and statistical optics : Coherence and statistical optics

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: April 15, 2010
Revised Manuscript: May 22, 2010
Manuscript Accepted: May 24, 2010
Published: May 27, 2010

Citation
Shijun Zhu, Yangjian Cai, and Olga Korotkova, "Propagation factor of a stochastic electromagnetic Gaussian Schell-model beam," Opt. Express 18, 12587-12598 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-12-12587


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