The phase screen with different atmospheric turbulence intensities was numerically simulated by Fourier transform method. Meanwhile, the phase and light intensity distribution characteristics of the Gaussian laser beam passing through the atmospheric turbulence were numerically studied, and the theoretical results and practical conclusions of the atmospheric phase screen were verified. The results show that the phase screen produced by Fourier transform method can intuitively illustrate the phase characteristics of atmospheric turbulence, and the phase and light intensity distribution of the Gaussian laser beam passing through atmospheric turbulence of different intensities were consistent with the theoretical analysis. Numerical simulation has certain guiding significance for the engineering application of laser transmission in the atmosphere.
The most practical laser coding styles is analyzed, including pulse interval codes, pseudo-random codes input by logic feedback functions and pseudo-random codes with random pulses inserted. According to the principle of code generation, the corresponding laser pulse code control software is designed. The results show that the laser code waveform generated by the software of the host computer is stable with strong applicability. The software lays the foundation for the realization of laser pulse code hardware.
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