论文部分内容阅读
利用数值方法研究了不同光传播起伏条件下湍流大气中准直激光束的光斑特征 ,结果表明 ,光斑稳定半径(Rrbt)和等效半径 (Reff)具有很好的相关性 ,虽然Rrbt 可应用于更一般的光斑 ,但它们都不适合衡量光斑质量 ;而锐度半径 (Rshp)可以恰当地反映光斑质量。对于准直激光束 ,在极弱起伏条件下 ,约有一半的光斑其质量变好或变差 ,但变化幅度很小 ;随起伏条件的加强 ,越来越多的光斑质量变差 ,但仍有一部分光斑质量变好 ,且程度越来越高
The spot characteristics of collimated laser beams in turbulent atmosphere under different light propagation fluctuations were studied numerically. The results show that Rrbt and Reff have good correlations. Although Rrbt can be applied to More general flare, but none of them are suitable for measuring spot quality; sharpness radius (Rshp) can properly reflect the spot quality. For the collimated laser beam, about half of the spots under the condition of very weak undulation show a good or bad quality, but the variation range is very small. With the enhancement of the undulating condition, more and more spot quality deteriorates but Part of the spot quality better, and the degree is getting higher and higher