Abstract
We study the spreading of the rms spatial and angular characteristics of partially coherent beams in turbulent media. The angular broadening of a beam is shown to be diffusion-like. The dynamics of the rms width of the beam is found to be determined by the interplay of free-space diffraction and turbulent diffusion. Our results indicate the conditions under which partially coherent beams are less sensitive to distortions caused by the atmospheric turbulence than are fully coherent beams.
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