在大气湍流斜程传输中拉盖高斯光束的轨道角动量的研究*

摘要

Atmospheric turbulence can cause random variations of the refractive index, resulting in a spatial inhomogeneity. When a Laguerre-Gaussian beam is propagating through the atmospheric turbulence, spatial inhomogeneity can bring about the change of photon wave function that causes variations in the orbital angular momentum. This article discusses how turbulence media change the orbital angular momentum of photons as to form different photon states, when the Laguerre-Gaussian beam is propagating in a slant-path atmospheric turbulence, by calculating the weight of the spiral harmonic component of the beam energy. Analysis of the variations of orbital angular momentum of Laguerre-Gaussian beam in the turbulent medium has been carried out.%大气湍流引起大气折射率随机变化，导致空间不均匀性。拉盖高斯光束在大气湍流中传输时，空间不均匀性会使光子波函数改变，引起轨道角动量的变化。本文讨论了拉盖尔高斯光束在大气斜程传输时，湍流介质改变光子轨道角动量而形成不同的光子态。计算了螺旋谐波各分量所占光束总能量的权重，分析了拉盖高斯光束的轨道角动量的变化规律。