双变形镜自适应光学全场补偿模拟
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摘要: 在双变形镜自适应光学系统中，实现全场补偿的关键步骤之一是使得变形镜2上主激光的振幅分布具有信标光振幅分布。根据Y-G波场恢复理论，编制了波前恢复程序，研究了实现振幅和位相校正湍流问题。研究表明，相对于纯相位补偿，全场补偿使得Strehl比提高了1.27~2.50倍。在变形镜1和变形镜2之间的距离为10m时，也使得Strehl比提高1.13~1.50倍。Abstract: One key step for full field correction is to match the main laser amplitude distribution with beacon amplitude distribution on deformable mirror 2 in two-deformable-mirror adaptive optics. Amplitude and phase corrections for turbulence are studied based on Y-G wavefront retrieval algorithms. The results show that full field corrections can improve Strehl ratio by a factor of 1.27 to 2.50 compared with phase-only correction. For a distance of 10m between deformable mirror1 and deformable mirror 2, the factor is from 1.13 to 1.50.
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Key words:
- adaptive optics /
- two-deformable-mirror /
- wavefront retrieval /
- laser propagation /
- turbulence
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