反常涡旋光束在湍流大气中的传输特性研究

Propagation Properties of Anomalous Vortex Beams in Turbulent Atmosphere

基于惠更斯-菲涅尔原理,该文推导了反常涡旋光束在湍流大气中传输的解析式。研究了大气折射率结构常数和光束尺寸等参量对其传输特性的影响。数值仿真显示,在同一观测平面上,随着大气结构常数的增大,涡旋光束中心暗斑的尺寸逐渐变小并最终消失;在相同的大气折射率下,随着传输距离的增大,涡旋光束中心暗斑的尺寸也逐渐变小。

Based on the Huygens- Fresnel principle,a closed-form propagation formula of anomalous vortex beams in atmospheric turbulence are derived. The influence of the atmospheric constant of refraction index structure and the beam size on the propagation characteristics are studied. The numerical simulations show that,in the same observation plane,the dark spot size of vortex beams decreases gradually and eventually disappear with the increase of refractive index structure constant. Furthermore,for the same atmospheric refraction rate,the dark spot size of the vortex beam decrease gradually with the increase of propagation distance.