The propagation properties of J0-correlated partially coherent beams in the slant atmosphere

Abstract

Based on the principle of crossspectral density of partially coherent beam，we have obtained the analytical expression of longterm intensity distribution，longterm beam width and quality factor on the receiver for J0correlated partially coherent beams propagating in the slant atmosphere，then analyzed the effects of zenith angle，propagation distance，coherence of source and turbulence outer scale on intensity distribution and beam width on the receiver. Results show that when the zenith angle and propagation distance are fixed，we can adjust the coherence of source to obtain the flattened optical intensity distribution or central maximum intensity value on the receiver. When the propagation is fixed，with the increase of zenith angle or the outer scale of turbulence，the intensity distribution varies from central dip to Gaussian distribution. Near the focal plane for short focal length，the centraldip form of intensity distribution becomes deep first，then shallow with the propagation distance increasing. The real position of focal spot for J0correlated partially coherent beam moves toward the emitter with the increase of zenith angle and turbulence outer scale, or with the decrease of the source coherence.