Open AccessThe propagation properties of J0-correlated partially coherent beams in the slant atmosphere
Author(s) -
Ji Cang,
Yixin Zhang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.2444
Subject(s) - zenith , optics , physics , coherence (philosophical gambling strategy) , coherence length , intensity (physics) , beam (structure) , turbulence , coherence time , degree of coherence , computational physics , meteorology , laser , superconductivity , quantum mechanics
Based on the principle of crossspectral density of partially coherent beamwe have obtained the analytical expression of longterm intensity distributionlongterm beam width and quality factor on the receiver for J0correlated partially coherent beams propagating in the slant atmospherethen analyzed the effects of zenith anglepropagation distancecoherence 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 fixedwe 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 fixedwith the increase of zenith angle or the outer scale of turbulencethe intensity distribution varies from central dip to Gaussian distribution. Near the focal plane for short focal lengththe centraldip form of intensity distribution becomes deep firstthen shallow with the propagation distance increasing. The real position of focal spot for J0correlated 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.