Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Predictive Control Algorithms for Adaptive Optical Wavefront Correction in Free-space Optical Communication

  • Ke, Xizheng (School of Automation and Information Engineering, Xi'an University of Technology) ;
  • Yang, Shangjun (School of Automation and Information Engineering, Xi'an University of Technology) ;
  • Wu, Yifan (School of Automation and Information Engineering, Xi'an University of Technology)
  • Received : 2021.08.27
  • Accepted : 2021.11.09
  • Published : 2021.12.25
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Abstract

To handle the servo delay in a real-time adaptive optics system, a linear subspace system identification algorithm was employed to model the system, and the accuracy of the system identification was verified by numerical calculation. Experimental verification was conducted in a real test bed system. Through analysis and comparison of the experimental results, the convergence can be achieved only 200 times with prediction and 300 times without prediction. After the wavefront peak-to-valley value converges, its mean values are 0.27, 4.27, and 10.14 ㎛ when the communication distances are 1.2, 4.5, and 10.2 km, respectively. The prediction algorithm can effectively improve the convergence speed of the peak-to-valley value and improve the free-space optical communication performance.

Keywords

Acknowledgement

This work was funded by the Key Industry Innovation Chain Project of Shaanxi Province (Grant No. 2017ZDCXL-GY-06-01), the Scientific Research Program of the Education Department of Shaanxi Province (Grant No. 18JK0341), and Xi'an Science and Technology Innovation Guidance Project [Grant No. 201805030YD8CG14 (12)].

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