Integral momenta of vortex Bessel-Gaussian beams in turbulent atmosphere

被引:17
|
作者
Lukin, Igor P. [1 ]
机构
[1] RAS, VE Zuev Inst Atmospher Opt, SB, 1 Acad Zuev Sq, Tomsk 634055, Russia
关键词
ORBITAL ANGULAR-MOMENTUM; LIGHT-BEAMS; PROPAGATION;
D O I
10.1364/AO.55.000B61
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The orbital angular momentum of vortex Bessel-Gaussian beams propagating in turbulent atmosphere is studied theoretically. The field of an optical beam is determined through the solution of the paraxial wave equation for a randomly inhomogeneous medium with fluctuations of the refraction index of the turbulent atmosphere. Peculiarities in the behavior of the total power of the vortex Bessel-Gaussian beam at the receiver (or transmitter) are examined. The dependence of the total power of the vortex Bessel-Gaussian beam on optical beam parameters, namely, the transverse wave number of optical radiation, amplitude factor radius, and, especially, topological charge of the optical beam, is analyzed in detail. It turns out that the mean value of the orbital angular momentum of the vortex Bessel-Gaussian beam remains constant during propagation in the turbulent atmosphere. It is shown that the variance of fluctuations of the orbital angular momentum of the vortex Bessel-Gaussian beam propagating in turbulent atmosphere calculated with the "mean-intensity" approximation is equal to zero identically. Thus, it is possible to declare confidently that the variance of fluctuations of the orbital angular momentum of the vortex Bessel-Gaussian beam in turbulent atmosphere is not very large. (C) 2016 Optical Society of America
引用
收藏
页码:B61 / B66
页数:6
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