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Atmospheric and Oceanic Optics

2012 year, number 11

The frequency of error bits appearance in systems of wireless optical communication with partly coherent transmitting beam

M.A. Vorontsov, V.V. Dudorov, M.O. Zyryanova, V.V. Kolosov, G.A. Filimonov
Keywords: беспроводная оптическая связь, турбулентная атмосфера, частичная когерентность, FSO communication, atmospheric turbulence, partial coherence

Abstract

The influence of the coherence degree of the transmitting beam on the bit error rate (BER) for free space optics (FSO) communication systems is investigated. It is found that for all types of propagation paths (horizontal, vertical or inclined), and various degrees of the turbulence strength there are the optimal value of the output power and the optimal degree of coherence of the optical transmitter beam defined by the Fried parameter. The optimal coherence degree can be determined by the minimum of BER.