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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 28 — Oct. 1, 2010
  • pp: 5333–5343

Free-space optical communications link budget estimation

Larry B. Stotts, Paul Kolodzy, Alan Pike, Buzz Graves, Dave Dougherty, and Jeff Douglass  »View Author Affiliations


Applied Optics, Vol. 49, Issue 28, pp. 5333-5343 (2010)
http://dx.doi.org/10.1364/AO.49.005333


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Abstract

This paper describes a new methodology of estimating free-space optical communications link budgets to be expected in conditions of severe turbulence. The approach is derived from observing that the ability of an adaptive optics (AO) system to compensate turbulence along a path is limited by the transmitter and receiver Rayleigh range, proportional to the diameter of the optics squared and inverse of the wavelength of light utilized. The method uses the Fried parameter computed over the range outside of the transmitter and receiver Rayleigh ranges, to calculate the Strehl ratios that yield a reasonable prediction of the light impinging on the receiving telescope aperture and the power coupling into the fiber. Comparisons will be given between theory and field measurements. These comparisons show that AO is most effective within the Rayleigh ranges, or when an atmospheric gradient is present, and lesser so when the total range is much greater than the sum of the Rayleigh ranges.

© 2010 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(010.1285) Atmospheric and oceanic optics : Atmospheric correction
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 11, 2009
Revised Manuscript: June 24, 2010
Manuscript Accepted: August 20, 2010
Published: September 24, 2010

Citation
Larry B. Stotts, Paul Kolodzy, Alan Pike, Buzz Graves, Dave Dougherty, and Jeff Douglass, "Free-space optical communications link budget estimation," Appl. Opt. 49, 5333-5343 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-28-5333


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