Open AccessEffective radius of curvature of spatially partially coherent beams propagating through non-Kolmogorov turbulence
Author(s) -
Yongping Huang,
Guoqiang Zhao,
Xi Xiao,
Fanhou Wang
Publication year - 2012
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.61.144202
Subject(s) - physics , radius , turbulence , curvature , beam (structure) , gaussian , effective radius , optics , exponent , radius of curvature , scale (ratio) , gsm , computational physics , mechanics , quantum mechanics , geometry , mathematics , telecommunications , mean curvature , galaxy , computer security , computer science , linguistics , philosophy , mean curvature flow
The laser beam propagation through atmospheric turbulence is of importance for both theoretical study and practical applications. Taking the Gaussian Schell-model (GSM) beam as a typical example of spatially partially coherent beams,based on the non-Kolmogorov spectrum and generalized Huygens-Fresnel principle, the analytical expression for the effective radius of curvature of GSM beams propagating through non-Kolmogorov turbulence is derived. The effects of turbulence parameters (including generalized exponent parameter, inner scale l0, and outer scale L0) and propagation distance z on the effective radius of curvature of GSM beams are stressed. It is shown that the effective radius of curvature of GSM beams increases with outer scale L0 decreasing for 3.6 4 and the inner scale l0 increasing, but dose not monotonically vary with the increases of exponent parameter and propagation distance z. The results are explained physically.