College of Engineering and Applied Sciences, Universidad de los Andes, Chile San Carlos de Apoquindo 2200, Santiago 7620001, Chile.
Opt Lett. 2011 May 1;36(9):1725-7. doi: 10.1364/OL.36.001725.
Through extensive laboratory experimentation we demonstrate that the temporal frequency content of turbulence-induced scintillation strongly depends on the temperature gradient exerted at the propagation path of a collimated laser beam. We find a power law relating the turbulence strength induced by convection with the vertical temperature gradient and we show that the cutoff frequency of scintillation shows an approximately linear growth with turbulence strength, measured by angle-of-arrival fluctuations. The impact of these findings are discussed in the context of free-space optical communications.
通过广泛的实验室实验，我们证明了由湍流引起的闪烁的时间频率内容强烈取决于准直激光束传播路径上施加的温度梯度。我们发现了一个与由对流引起的湍流强度与垂直温度梯度相关的幂律关系，并表明闪烁的截止频率随着由到达角波动测量的湍流强度近似线性增长。这些发现的影响在自由空间光通信的背景下进行了讨论。
