Abstract

In order to reduce the impact of background radiation on the performance of terrestrial free-space optical systems, we propose to use two laser wavelengths and to perform the data detection at the receiver in a differential mode. We consider first the case of simple on–off keying modulation and show the performance improvement by using the proposed technique when the background noise dominates. We also extend our study to the case of pulse position modulation while proposing special signaling schemes that allow an increase in the data transmission rate at the same time as reducing the background noise effect.

©2011 Optical Society of America

Optical Spatial Modulation

Raed Mesleh, Hany Elgala, and Harald Haas
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Adaptive Optimization of a Free Space Laser Communication System Under Dynamic Link Attenuation

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Connectivity Issues for Ultraviolet UV-C Networks

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J. Opt. Commun. Netw. 3(5) 435-446 (2011)