Fig. 1. Diagram of slant path transmission link

Fig. 2. Two-dimensional intensity and phase distribution of POV beams with different transmission distances under atmospheric turbulence

Fig. 3. One-dimensional intensity distribution of POV beams at different transmission distances

Fig. 4. Variation of beam drift of different topological charges and the comparison of beam drift of perfect vortex and Gaussian vortex

Fig. 5. POV beam drift varies with transmission distance for different zenith angles

Fig. 6. Curve of beam drift with the radius of POV beam ring

Fig. 7. Variation of the mean scintillation index of the aperture of a beam with different topological charges and the comparison between POV and Gaussian vortex scintillation index

Fig. 8. Variation of mean scintillation index of POV beam aperture with different zenith angles and transmission distance

Fig. 9. Mean scintillation index of aperture varies with the radius of POV beam