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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 13 — May. 1, 2008
  • pp: 2414–2429

Turbulence-induced channel crosstalk in an orbital angular momentum-multiplexed free-space optical link

Jaime A. Anguita, Mark A. Neifeld, and Bane V. Vasic  »View Author Affiliations

Applied Optics, Vol. 47, Issue 13, pp. 2414-2429 (2008)

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A multichannel free-space optical (FSO) communication system based on orbital angular momentum (OAM)-carrying beams is studied. We numerically analyze the effects of atmospheric turbulence on the system and find that turbulence induces attenuation and crosstalk among channels. Based on a model in which the constituent channels are binary symmetric and crosstalk is a Gaussian noise source, we find optimal sets of OAM states at each turbulence condition studied and determine the aggregate capacity of the multichannel system at those conditions. OAM-multiplexed FSO systems that operate in the weak turbulence regime are found to offer good performance. We verify that the aggregate capacity decreases as the turbulence increases. A per-channel bit-error rate evaluation is presented to show the uneven effects of crosstalk on the constituent channels.

© 2008 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(010.7060) Atmospheric and oceanic optics : Turbulence
(050.7330) Diffraction and gratings : Volume gratings
(060.4230) Fiber optics and optical communications : Multiplexing
(060.2605) Fiber optics and optical communications : Free-space optical communication
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 19, 2007
Revised Manuscript: February 8, 2008
Manuscript Accepted: February 12, 2008
Published: April 28, 2008

Jaime A. Anguita, Mark A. Neifeld, and Bane V. Vasic, "Turbulence-induced channel crosstalk in an orbital angular momentum-multiplexed free-space optical link," Appl. Opt. 47, 2414-2429 (2008)

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