论文部分内容阅读
激光通过大气湍流传输,光束扩展主要由空间衍射和大气湍流两个物理机制确定,而大气湍流对光束扩展的影响又与光束空间衍射特性相关。研究了部分相干厄米-高斯(H-G)光束通过非Kolmogorov大气湍流传输光束扩展区间问题,把光束扩展按传输距离划分为三个区间,造成这三个区间的光束扩展的主要物理机制依次是:空间衍射、空间衍射和大气湍流、大气湍流。详细研究了部分相干H-G光束参数和大气湍流参数对这三个区间范围大小的影响,以及第一个光束扩展区间与光束瑞利区间的关系,并对主要结果给出了合理的物理解释。
The laser propagates through atmospheric turbulence, and the beam expansion is mainly determined by the two physical mechanisms of spatial diffraction and atmospheric turbulence. The influence of atmospheric turbulence on the beam expansion is related to the beam diffraction characteristics. The problem of propagation of partially coherent Hermite-Gaussian (HG) beams propagating through non-Kolmogorov atmospheric turbulence is studied. The main physical mechanism of beam spreading in these three intervals is: Space diffraction, space diffraction and atmospheric turbulence, atmospheric turbulence. The effects of the partially coherent H-G beam parameters and the atmospheric turbulence parameters on the range of these three intervals and the relationship between the first beam expansion interval and the Rayleigh Ray range are also studied in detail. A reasonable physical explanation of the main results is given.