Fig. 1. Interference patterns of vortex beams with different topological charges. (a) l=1; (b) l=10; (c) l=30

Fig. 2. Displacements of interference fringes under different turbulence intensities. (a1) Static water, l=1; (a2) static water, l=10; (a3) static water, l=30; (b1) weak turbulence, l=1; (b2) weak turbulence, l=10; (b3) weak turbulence, l=30; (c1) strong turbulence, l=1; (c2) strong turbulence, l=10; (c3) strong turbulence, l=30

Fig. 3. Light path of experimental setup

Fig. 4. Interference fringes under different turbulence intensities. (a) Static water, α=0°; (b) weak turbulence, α=45°; (c) strong turbulence, α=90°

Fig. 5. Gray-level difference in displacements of interference fringes. (a) Static water, α=0°; (b) strong turbulence, α=90°

Fig. 6. Influences of relative intensity of turbulence and topological charge on displacement of relative position of interference fringes