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Optical Engineering

Further results on fog modeling for terrestrial free-space optical links
Author(s): Muhammad S. Khan; Erich Leitgeb; Sajid S. Muhammad; Muhammad S. Awan; Vaclav Kvicera; Martin Grabner
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Paper Abstract

Recent measurement campaigns in Prague, Czech Republic have recorded the specific attenuation caused by fog in terrestrial free-space optical (FSO) links along with visibility, liquid water content (LWC), and integrated particle surface area for operational wavelengths of 1550 and 830 nm. Data recorded during 5 months of measurements has been analyzed in an attempt to validate and improve the empirical models for LWC and visibility-based attenuation and the probability density function (PDF) estimation of the received signal strength (RSS). The results strongly suggest that further attempts in refinement of the empirical modeling for visibility-based attenuation or LWC-based attenuation shall move towards the establishment of a global data bank of fog attenuation measurements in different climatic regions. This data bank can then help develop generic models which could lead to better system design of future terrestrial FSO links. The PDF estimation of RSS puts forth the Kumaraswamy distribution as the best fit for settled continental fog conditions.

Paper Details

Date Published: 9 April 2012
PDF: 10 pages
Opt. Eng. 51(3) 031207 doi: 10.1117/1.OE.51.3.031207
Published in: Optical Engineering Volume 51, Issue 3
Show Author Affiliations
Muhammad S. Khan, Technische Univ. Graz (Austria)
Erich Leitgeb, Technische Univ. Graz (Austria)
Sajid S. Muhammad, National Univ. of Computer and Emerging Sciences (Pakistan)
Muhammad S. Awan, Pakistan Institute of Laser and Optics (Pakistan)
Vaclav Kvicera, Czech Metrology Institute (Czech Republic)
Martin Grabner, Czech Metrology Institute (Czech Republic)

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