NUMERICAL SIMULATION OF LIGHT PULSE TRANSMISSION IN ATMOSPHERIC TURBULENCE

Light pulse spreading time caused by atmospheric turbulence results in the shape variation of pulse time and an increase in bit error rate. This study used a split-step transmission method under weak turbulence across a horizontal path to conduct a numerical simulation calculation of collimating ultra-short pulse transmission with a two-frequency mutual coherence function. Then, the results are compared with the numerical analysis results of 100 groups of data. Under weak turbulence and narrow-band assumptions, numerical simulation results of the two-frequency mutual coherence function for the first 20 groups of data were identical with the numerical analysis results. The results also demonstrated that as the difference in value between the two frequencies increased, the degree of coherence that could be maintained was reduced.