【摘要】 利用激光大气传输及其相位校正四维程序,计算了不同的发射和传输条件对平台聚焦光束水平大气传输及其自适应光学校正的影响。结果表明:自适应光学系统开环时,在弱湍流效应条件下,以D／r₀为特征参量可以很好地表征湍流效应的强弱,SR值满足关系式SR=exp[-0．2（D／r₀）2],不考虑系统像差时,光束质量因子满足关系式β2=1+1．2（D／r₀）2;随着湍流强度或传输距离的增加,要考虑闪烁效应和相位不连续性对光束质量的影响,以D／r₀为特征参量就不足以表征湍流效应的强弱。另外,对于不同的发射和传输条件,自适应光学系统对激光大气传输的校正范围是不同的,且存在一阈值,条件不同其阈值是不同的。更多还原

【Abstract】 By using the four-dimension code of laser propagating in atmosphere and compensation of adaptive optics, the focused flat beam with different transmitted condition is computed. The results show that the parameter D/r₀ could do well in describing the turbulence strength in weak turbulence condition when the adaptive optics is open, and the Strehl ratio（SR） could be written as SR = exp[-0.2（-D/r₀）2], the quality factor of laser beam could be write asβ² = 1 + 1.2（D/r₀）2. When the strength of turbulence or the length of propagating is increased, the effect of scintillation and the branch points on the laser beam must be considered, and the parameter D/r₀ is out of use. In addition, there is a threshold in compensation of adaptive optics on laser beam with different transmitted conditions.更多还原