Evolution behavior of mixed screw-edge dislocations propagating through atmospheric turbulence

Abstract

In this paper we studied the evolution of an optical vortex and an edge dislocation in atmospheric turbulence, It is shown that when mixed screw-edge dislocations beams propagate through atmospheric turbulence, the optical vortex always exists, and the edge dislocation evolves into a pair of optical vortices; when the transmission distance becomes large enough, the pair of optical vortices annihilates. The bigger the refraction index structure constant and off-axis distance of the edge dislocation, the smaller the annihilation distance of the pair of optical vortices. Especially, mixed screw-edge dislocations evolve into two optical vortices with same topological charge when the off-axis distance of the edge dislocation is zero.