Effects of beam wander on free-space optical communications through turbulent atmosphere

Zhijun Zhao; Rui Liao

doi:10.1117/12.852479

4 May 2010 Effects of beam wander on free-space optical communications through turbulent atmosphere

Zhijun Zhao, Rui Liao

Proceedings Volume 7685, Atmospheric Propagation VII; 76850K (2010) https://doi.org/10.1117/12.852479
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Effects of beam wander on uncoded bit-error-rate (BER) of direct-detection OOK modulated FSO communication systems using collimated and focused Gaussian beams are studied. Channel fading statistics are obtained from large-scale wave optics simulations and compared with the closed-form log-normal and gamma-gamma models. The avalanche photodiode (APD) is chosen for photodetection. The accurate McIntyre-Conradi APD model is adopted for performance evaluation. Results show that large performance gain (more than 15dB) can be achieved with fast-tracked focused beams. The upper bound of higher-order adaptive optics gain beyond tracking gain is also studied.

Citation Download Citation

Zhijun Zhao and Rui Liao "Effects of beam wander on free-space optical communications through turbulent atmosphere", Proc. SPIE 7685, Atmospheric Propagation VII, 76850K (4 May 2010); https://doi.org/10.1117/12.852479

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