Abstract
Mathematical models for the superimposed orbital angular momentum
(OAM) mode of multiple Hankel–Bessel (HB) beams in anisotropic
non-Kolmogorov turbulence are developed. The effects of anisotropic
turbulence and source parameters on the mode detection spectrum of the
superimposed OAM mode are analyzed. Anisotropic characteristics of the
turbulence in the free atmosphere can enhance the performance of OAM-based
communication. The HB beam is a good source for mitigating the turbulence
effects due to its nondiffraction and self-focusing properties. Turbulence
effects on the superimposed OAM mode can be effectively reduced by the
appropriate allocation of OAM modes at the transmitter based on the
reciprocal features of the mode cross talk.
© 2016 Chinese Laser Press
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