研究目的
Investigating the performance of the entangled OAM photons propagating though atmospheric turbulence with adaptive optics system compensation under different wavefront reconstruction algorithm and spatial bandwidth of AO system condition.
研究成果
BP algorithm has better compensation performance when Rytov number exceeds 0.2 than LS algorithm. High spatial bandwidth has better compensation effect. The study provides reference for AO compensation of entangled OAM communication in atmospheric turbulence.
研究不足
The AO system model is relatively ideal and simpler. The influence that noises have on wavefront sensor and bandwidth of control system need further study. And the non-Kolmogorov turbulence should be further considered.
1：Experimental Design and Method Selection:
The study uses a numerical simulation approach to model the propagation of entangled OAM photons through atmospheric turbulence with AO system compensation. The performance of two wavefront reconstruction algorithms (LS and BP) is tested.
2：Sample Selection and Data Sources:
The simulation involves entangled OAM photons propagating through modeled atmospheric turbulence.
3：List of Experimental Equipment and Materials:
Ideal Gaussian beams are used as beacons, and different element deformable mirrors (19-element, 61-element, and 127-element) are simulated.
4：Experimental Procedures and Operational Workflow:
The propagation of optical fields is simulated using split step FFT algorithm, with atmospheric turbulence modeled by turbulent phase screens.
5：Data Analysis Methods:
The concurrence of output states is calculated to describe the decay of entanglement, and OAM scattering coefficients are analyzed.
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