Open AccessInfluence of turbulence on the spreading of annular beams
Author(s) -
Xiaowen Chen,
Xiaoling Ji
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.58.2435
Subject(s) - turbulence , radius , beam (structure) , physics , range (aeronautics) , optics , atmospheric turbulence , k epsilon turbulence model , beam diameter , mechanics , materials science , laser beams , laser , computer security , computer science , composite material
The closed-form expression for the mean squared beam width of annular beams propagating through atmospheric turbulence is derived by using the integral transform technique. The influence of turbulence on the spreading of annular beams is studied. On the other handthe range of turbulence-independent propagation is obtained by examining the mean squared beam widthwhich indicates under what circumstances annular beams will be less affected by turbulence. It is shown that annular beams with larger obscure ratio εlarger beam order MNlarger wave length λand smaller outer radius w0 are less sensitive to the turbulence than those with smaller εMNλand larger w0. The main results obtained in this paper are explained physically.