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Proceedings Paper

Channel characterization for air-to-ground free-space optical communication links
Author(s): Kevin Shortt; Dirk Giggenbach; Ramon Mata-Calvo; Florian Moll; Christian Fuchs; Christopher Schmidt; Joachim Horwath; Jack Yeh; Vevek Selvaraj; Ranjoy Banerjee
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Paper Abstract

The next five to ten years will see more and more free-space optical communication systems being put into practical use as technologies and techniques continue to mature, particularly in the area of mobile and satellite-to-ground communications. To meet the increasing demand of these types of systems, it is necessary to gain a deeper understanding of the various atmospheric effects at play in a free-space optical link in an effort to mitigate their impact on operational systems. In that context, the German Aerospace Center (DLR) has conducted a number of field trials between a Dornier 228 aircraft and its ground station in Oberpfaffenhofen, just south of Munich, Germany. These field trials have involved the concurrent measurement of atmospheric turbulence using three different techniques: pupil plane imaging, focus spot imaging and Shack-Hartmann wave-front sensing. To ensure the accurate synchronization of measurements between the three techniques, a concerted effort was made in the selection of computer hardware and the development of image acquisition software. Furthermore, power measurements in up- and downlink have been taken to be further correlated with the 3 primary instruments. It is envisioned that the resulting analysis of these measurements shall contribute to the implementation of new adaptive optics techniques to facilitate various air and space communication links. This paper shall describe the overall experiment design as well as some of the design decisions that led to the final experiment configuration.

Paper Details

Date Published: 6 March 2014
PDF: 13 pages
Proc. SPIE 8971, Free-Space Laser Communication and Atmospheric Propagation XXVI, 897108 (6 March 2014); doi: 10.1117/12.2039834
Show Author Affiliations
Kevin Shortt, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Dirk Giggenbach, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Ramon Mata-Calvo, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Florian Moll, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Christian Fuchs, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Christopher Schmidt, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Joachim Horwath, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Jack Yeh, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Vevek Selvaraj, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Ranjoy Banerjee, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)


Published in SPIE Proceedings Vol. 8971:
Free-Space Laser Communication and Atmospheric Propagation XXVI
Hamid Hemmati; Don M. Boroson, Editor(s)

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