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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 7 — Mar. 1, 2009
  • pp: 1274–1287

Fade statistics of a ground-to-satellite optical link in the presence of lead-ahead and aperture mismatch

Santasri Basu, David Voelz, and Deva K. Borah  »View Author Affiliations


Applied Optics, Vol. 48, Issue 7, pp. 1274-1287 (2009)
http://dx.doi.org/10.1364/AO.48.001274


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Abstract

In a recent publication [ J. Opt. Soc. Am. A 25, 1594–1608 (2008)] we developed expressions for the tilt errors that arise from the effects of lead-ahead and aperture mismatch when transmitting a laser beam from the ground to a satellite. We extend these results to examine the fade statistics of the irradiance at the satellite due to these tilt errors and turbulence induced scintillation. The system concept is that the light from a beacon on the satellite is received by the ground station and a derived signal is used to drive a tracking/pointing system for the uplink beam. However, the beam must be pointed ahead along the satellite track to intercept the satellite (lead-ahead), and physical constraints may require that the beam transmit aperture is different in size or location than the aperture receiving the beacon signal (aperture mismatch). These two issues cause the light entering the receiving aperture (tracker) and the beam exiting the transmit aperture (pointer) to traverse somewhat different turbulence volumes, which limits the ability of the tracking/pointing system to place the maximum flux on the satellite.

© 2009 Optical Society of America

OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(030.6600) Coherence and statistical optics : Statistical optics
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: October 10, 2008
Revised Manuscript: December 23, 2008
Manuscript Accepted: January 18, 2009
Published: February 23, 2009

Citation
Santasri Basu, David Voelz, and Deva K. Borah, "Fade statistics of a ground-to-satellite optical link in the presence of lead-ahead and aperture mismatch," Appl. Opt. 48, 1274-1287 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-7-1274

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