大气湍流对贝塞尔高斯光束轴上光强的影响  

Influence of Atmospheric Turbulence on the Axial Intensity of Bessel-Gauss Beams

作　　者：马秀波[1] 李恩邦[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《光电工程》2009年第6期42-45,共4页Opto-Electronic Engineering

基　　金：国家自然科学基金(60578054;60877049);天津市重点基金(08JCZDJC19300)

摘　　要：针对光束在大气中传播时,大气湍流引起的光强起伏等现象。为了探索寻求减弱或者消除湍流的影响的途径,本文采用数值模拟的方法,分析了湍流大气对(零阶)贝塞尔高斯光束轴上光强的影响。分析发现,在湍流环境中,贝塞尔高斯光束的轴上光强都随着传播距离的增加而减小,湍流越强,光束的轴上光强减小越快。贝塞尔高斯光束的径向波矢量越小,轴上光强的稳定性越好。贝塞尔高斯光束轴上光强的稳定性随着传播距离的增加而变坏。贝塞尔高斯光束跟同样束宽的高斯光束相比较,贝塞尔高斯光束的轴上光强受湍流的影响较大。Light intensity fluctuation is caused by atmospheric turbulence while laser beam travels in atmosphere. In order to find an approach to weaken or remove the effect of turbulence, the influence of atmospheric turbulence on the axial intensity of Bessel-Gauss Beams of zero-order was investigated by means of numerical simulation. The results show that the axial intensity of Bessel-Gauss beams decreases with the increase of propagation distance, and the stronger the atmospheric turbulence is, the faster the axial intensity decreases. The smaller the radial wave vectors of the Bessel-Gauss beams of zero-order, the better the stability of their axial intensity. The stability of axial intensity of Bessel-Gauss beams gets worse with the increase of propagation distance. Compared with Gaussian beams with the same beam width, the axial intensity of Bessel-Gauss beams is more affected by atmospheric turbulence .

关 键 词：激光通信 贝塞尔高斯光束 高斯光束 大气湍流 轴上光强 

分 类 号：O431[机械工程—光学工程]