Chen Mingzhou, Roux Filippus S
Applied Optics, School of Physics, National University of Ireland Galway, University Road, Galway, Ireland.
J Opt Soc Am A Opt Image Sci Vis. 2010 Oct 1;27(10):2138-43. doi: 10.1364/JOSAA.27.002138.
Knowledge of the behavior of stochastic optical fields can aid the understanding of the scintillation of light propagating through a turbulent medium. For this purpose, we perform a numerical investigation of the evolution of the scintillation index and the optical vortex density in a speckle field after removing its continuous phase. We find that both the scintillation index and the vortex density initially drop and then increase again to reach an equilibrium level. It is also found that the initial rate of decrease in both cases is 1 order of magnitude faster than the eventual rate of increase. Their detail shapes are however different. Therefore different empirical functions are used to fit the shapes of these curves.
了解随机光场的行为有助于理解光在湍流介质中传播时的闪烁现象。为此，我们对散斑场去除连续相位后的闪烁指数和光学涡旋密度的演化进行了数值研究。我们发现，闪烁指数和涡旋密度最初都会下降，然后再次上升至平衡水平。还发现，在这两种情况下，初始下降速率比最终上升速率快1个数量级。然而，它们的详细形状有所不同。因此，使用不同的经验函数来拟合这些曲线的形状。
