Fig. 1. FSO communication system under Gamma-Gamma turbulence model

Fig. 2. Probability density function under different turbulence intensities

Fig. 3. Performance of polar codes under different atmospheric turbulence intensities

Fig. 4. Performance comparison between polar codes and LDPC codes under different turbulence intensities

Fig. 5. Analysis of the impact of code length on the performance of polar codes

Fig. 6. Analysis of the impact of code rate on the performance of polar codes

Fig. 7. Analysis of the influence of decoding width on the performance of polar codes