The dynamic atmospheric turbulence is simulated in the laboratory upon the phase-only liquid crystal spatial light
modulator. Dynamic phase screens are generated by the spline function method and the frozen turbulence method. The
average cross-correlation coefficient of the Zernike coefficients between these two methods is 0.6608. Moreover, the
laser atmospheric transition experiment is carried on under different turbulence intensities. The logarithmic light
intensity probability density distribution is close to the normal distribution, and the fitting determine coefficient is above
0.9. In the weak turbulence (r0=0.1m), the standard deviation of the arrival angle fluctuation is approximately 30 to 40
μrad, while it is 40 to 50 μrad in the moderate turbulence (r0=0.01m). The simulation result is compliant with the
turbulence theory. Compared with the frozen method, the arrival angle fluctuation spectrum in high frequency upon the
spline method is smoother. It reveals that although two methods have a good consistency with each other, the dynamic
simulation of the spline method is supposed to be more favorable in the researching of the free-space laser propagation.
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