Optimal subharmonics selection for atmosphere turbulence phase screen simulation using the subharmonic method

ABSTRACT

We investigate the optimal subharmonics selection for atmospheric turbulence phase screen simulation with a given precision using the fast Fourier transform-based subharmonic method. A criterion appropriate for the Kolmogorov model, the von Karman model and the modified von Karman model – called the structure function increment ratio – is defined to determine the optimal subharmonics. Moreover, the integrated power ratio criterion is improved, an expression is presented to calculate the optimal subharmonics to add, and the scope of application is wider than in the past. More accurate optimal subharmonics can be achieved by using either the improved criterion or the structure function increment ratio.

KEYWORDS:

• Atmospheric turbulence
• phase screen
• subharmonic method
• optimal subharmonics

Acknowledgements

We acknowledge discussions with Cong Zhu, generous support of Chunyang Sun, as well as technical support of Haoran Guo and Menghui Li.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This project was financed by the National Natural Science Foundation of China (grant number 61302105), the Fundamental Research Funds for the Central Universities (grant number 2017MS107), and the Science and Technology Research Foundation for Colleges and Universities in Hebei Province (grant number QN2016093).