Abstract
In order to restrain the scintillation effect in the course of laser transmitting through the atmosphere, the relation between the laser coherence and the scintillation index was researched. First, the mathematic model correlating with laser coherence was established based on the generation mechanism of scintillation effect. Then, the laser was divided into four beams, and the coherence was destroyed. On this basis, the atmosphere turbulence emulation experiment device was made using the random phase screen as core element, and the far field spot scintillation index with different laser coherence was evaluated. Experimental results indicate that the scintillation index with four beams reduce about 75% in comparison with single beam. So the availability of multiple partially coherent beams limiting laser intensity scintillation effect has been approved by the result of theory analyzing and experiment.
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