Fig. 1. The schematic diagram of the CSV beam array where N=12，l₀=6

Fig. 2. The angular characteristic of CSV beam

Fig. 3. Transmission model of atmosphere phase screens

Fig. 4. Far-field intensity distribution and OAM mode distribution

Fig. 5. Convergence curve of J_D under different α

Fig. 6. Convergence curve of J_O，J_C and J_D

Fig. 7. The results of SPGD wavefront phase correction using J_O， J_Cand J_D as metric function

Fig. 8. The schematic diagram of dual-ring array

Fig. 9. Far-field intensity distribution and OAM mode distribution of CSV beam with dual-ring array

Fig. 10. The results of wavefront phase correction for CSV beam with dual-ring array