We numerically examine the spatial evolution of the structure of coherent andpartially coherent laser beams (PCBs), including the optical vortices,propagating in turbulent atmospheres. The influence of beam fragmentation andwandering relative to the axis of propagation (z-axis) on the value of thescintillation index (SI) of the signal at the detector is analyzed. A methodfor significantly reducing the SI, by averaging the signal at the detector overa set of PCBs, is described. This novel method is to generate the PCBs bycombining two laser beams - Gaussian and vortex beams, with differentfrequencies (the difference between these two frequencies being significantlysmaller than the frequencies themselves). In this case, the SI is effectivelysuppressed without any high-frequency modulators.
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