Research of the simulation of dynamic atmospheric turbulence based on liquid crystal spatial light modulator

Mengyun Duan; Xin Shan; Yong Ai; Zhun Xiong; Min Liu; Zhengren Zhou

doi:10.1117/12.2071625

20 November 2014 Research of the simulation of dynamic atmospheric turbulence based on liquid crystal spatial light modulator

Mengyun Duan, Xin Shan, Yong Ai, Zhun Xiong, Min Liu, Zhengren Zhou

Author Affiliations +

Proceedings Volume 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications; 930019 (2014) https://doi.org/10.1117/12.2071625
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

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.

Citation Download Citation

Mengyun Duan, Xin Shan, Yong Ai, Zhun Xiong, Min Liu, and Zhengren Zhou "Research of the simulation of dynamic atmospheric turbulence based on liquid crystal spatial light modulator", Proc. SPIE 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications, 930019 (20 November 2014); https://doi.org/10.1117/12.2071625

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