Optimization criterion for initial coherence degree of lasers in free-space optical links through atmospheric turbulence

摘要

Partially coherent beams can be used to reduce the turbulence-induced scintillations; however, the partialncoherence induces the decrease of the mean received irradiance. An optimization criterion for the initial co-nherence degree of lasers is proposed. This criterion maximizes the received irradiance that occurs with thenhighest probability. A method for adaptive initial coherence was given to use the criterion in practicalnapplications. © 2009 Optical Society of American.