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Proceedings Paper

Multiple-wavelength free-space laser communications
Author(s): Robert Purvinskis; Dirk Giggenbach; Hennes Henniger; Nicolas Perlot; Florian David
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Paper Abstract

Free-space optical communications systems in the atmosphere, based on intensity modulation and direct detection, are heavily affected by fading caused by turbulence cells of varying scale and motion. Several data sets of fading measurements under different scenarios have been recorded demonstrating this effect. In this paper we introduce a form of free-space laser communications involving a source operating on several wavelengths. The goal is to overcome atmospheric interference on a communications link. We have performed simulations using the DLR PILab Matlab toolbox. These indicate the extent to which the turbulence and beam properties interact. Experimental investigations are planned. Further properties are also taken into account, including the choice of appropriate laser bandwidth and wavelengths, the effect of atmospheric absorption from aerosols and molecular absorption lines, as well as effects of atmospheric structure on beam propagation. Possible scenarios for application of this scheme will be presented as well.

Paper Details

Date Published: 3 July 2003
PDF: 8 pages
Proc. SPIE 4975, Free-Space Laser Communication Technologies XV, (3 July 2003); doi: 10.1117/12.478932
Show Author Affiliations
Robert Purvinskis, Univ. of Southern Australia (Australia)
Dirk Giggenbach, German Aerospace Ctr. (Germany)
Hennes Henniger, German Aerospace Ctr. (Germany)
Nicolas Perlot, German Aerospace Ctr. (Germany)
Florian David, German Aerospace Ctr. (Germany)


Published in SPIE Proceedings Vol. 4975:
Free-Space Laser Communication Technologies XV
G. Stephen Mecherle, Editor(s)

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