Beam spreading and scintillation of perfect vortex beam propagating in atmospheric turbulence

In order to study the anti-turbulence performance of the perfect vortex beam which carrying Orbital angular momentum(OAM), the average intensity distribution, beam spreading and scintillation characteristics of the perfect vortex beam propagating in atmospheric turbulence are simulated based on the multi-phase screen method by making use of the Von Karman spectrum. The impacts of beam parameters (OAM number, wavelength,) and atmospheric turbulence parameters (inner scale, outer scale) on the beam spreading and scintillation of perfect vortex beams are investigated. The results show that the beam parameters can be adjusted to reduce the scintillation and beam spreading effects caused by atmospheric turbulence. Perfect vortex beams with smaller OAM numbers and larger wavelengths have better resistance to turbulence. The smaller the outer scale and the larger the inner scale of the atmospheric turbulence, the better propagation performance of perfect vortex beam. The research of this paper provides an important reference for optimizing the optical communication performance of perfect vortex beams in atmospheric turbulence.