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Proceedings Paper

Physical and statistical modeling of attenuation due to atmospheric hydrometeors on free-space optical links at 850 and 1550 nm
Author(s): Martin Grabner; Vaclav Kvicera
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Paper Abstract

Atmospheric hydrometeors such as rain and fog may cause attenuation of an optical signal and degrade the performance of free-space optical (FSO) systems. For efficient design of the FSO links, attenuation characteristics must be predicted by sufficiently reliable models that have been tested on experimental data. A long term experiment on the FSO links operating at 850 and 1550 nm wavelengths is conducted in Prague. The path lengths are 100 and 853 m. Received power fluctuations on the FSO links and relevant meteorological quantities such as rain intensity and liquid water content of fog are measured simultaneously. The relationships between the physical parameters of hydrometeors and path attenuation are analyzed and compared with theoretical relations derived using the Mie scattering theory together with some natural assumptions about the physical properties of scattering particles such as droplet size distribution of different types of hydrometeors. Long term statistics of attenuation are obtained and availability performance of the experimental FSO links is assessed. The method for predicting attenuation statistics based on physical and statistical models is introduced and the errors of the proposed models with respect to measured data are analyzed. The models are compared with the existing empirical relationships derived from other FSO experiments and differences are discussed.

Paper Details

Date Published: 24 October 2012
PDF: 9 pages
Proc. SPIE 8517, Laser Communication and Propagation through the Atmosphere and Oceans, 851716 (24 October 2012); doi: 10.1117/12.928915
Show Author Affiliations
Martin Grabner, Czech Metrology Institute (Czech Republic)
Vaclav Kvicera, Czech Metrology Institute (Czech Republic)


Published in SPIE Proceedings Vol. 8517:
Laser Communication and Propagation through the Atmosphere and Oceans
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel; Arun K. Majumdar, Editor(s)

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