Abstract
Vortex laser beams carrying an orbital angular momentum (OAM) are increasingly being used for compression of information transfer channels. As a rule, separate beams with an integer OAM are used. We consider vortex beams representing a superposition of the Laguerre-Gaussian (LG) modes with a fractional OAM. Such beams enhance the capabilities and improve the security of information transfer. The propagation of multimode LG beams in a random medium is numerically modelling and the conservation of the OAM is analysed.
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