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Proceedings Paper

Background light environment for free-space optical terrestrial communications links
Author(s): David Rollins; Jeff Baars; David P. Bajorins; Carrie Sjaarda Cornish; Kenneth W. Fischer; Thomas Wiltsey
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Paper Abstract

Free-space optical (FSO) links for high-speed communications between buildings must consider detrimental environmental effects including interference from sunlight in the receiver's instantaneous field of view (IFOV). Sunlight can degrade receive sensitivity resulting in link disruptions, even with significant optical filtering. Thus it is important to characterize this environmental effect for designing and testing optical transceivers. Background light levels are highly dependent on the geometry and environmental conditions of a specific link making general statements difficult. However, we have characterized the likelihood and frequency of direct or reflected sunlight passing into or near a terminal's IFOV. We have also measured detector solar power levels under sunny and partly cloudy conditions, and measured detector sensitivity degradation as a function of background light levels. This paper presents a summary of our results.

Paper Details

Date Published: 6 December 2002
PDF: 12 pages
Proc. SPIE 4873, Optical Wireless Communications V, (6 December 2002); doi: 10.1117/12.455520
Show Author Affiliations
David Rollins, Terabeam Corp. (United States)
Jeff Baars, Terabeam Corp. (United States)
David P. Bajorins, Terabeam Corp. (United States)
Carrie Sjaarda Cornish, Terabeam Corp. (United States)
Kenneth W. Fischer, Terabeam Corp. (United States)
Thomas Wiltsey, Terabeam Corp. (United States)


Published in SPIE Proceedings Vol. 4873:
Optical Wireless Communications V
Eric J. Korevaar, Editor(s)

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