Turbulence-induced channel crosstalk in an orbital angular momentum-multiplexed free-space optical link
Applied Optics, Vol. 47, Issue 13, pp. 2414-2429 (2008)
http://dx.doi.org/10.1364/AO.47.002414
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Abstract
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
History
Original Manuscript: November 19, 2007
Revised Manuscript: February 8, 2008
Manuscript Accepted: February 12, 2008
Published: April 28, 2008
Citation
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)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-13-2414
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