摘要
在扩展Huygens-Fresnel原理和Rytov近似的基础上,得到了孔径限制下湍流大气中高斯光束平均光强的积分表达式,利用数值模拟方法分析了轴上和接收面上平均光强的分布,并得到了波阵面半径、传播距离、湍流强度和波长与平均光强的关系曲线图。结果表明在湍流大气中波长、传播距离、发射孔径和波阵面半径的改变会引起平均光强重心的漂移,传播距离增加会导致光束的展宽。
Based on the extended Huygen-Fresnel principle and Rytov approximation in weak turbulence, the receiver aver-age intensity limited by an aperture in atmospheric turbulence is examined. Under the numerical integration the average intensity on axis and receiver plane is analyzed, and the graph is plotted between the curvature of wavefront, propagation distance, turbulence intensity and wavelength and the average intensity. It indicates that the variance of wavelength and propagation distance and the aperture radius impact on the wander of the barycenter of average intensity in atmospheric turbulence, and the increase of propagation distance causes the diffusion of the beams.
出处
《光学与光电技术》
2006年第6期42-45,共4页
Optics & Optoelectronic Technology
