可压缩涡中的激光传播  

Laser Beam Propagation in Compressible Vortical Field

作　　者：马小亮[1] 杨国伟[1] 申义庆[1] 

机构地区：[1]中国科学院力学研究所高温气体动力学重点实验室,北京100080

出　　处：《计算物理》2008年第5期602-606,共5页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(10402043)资助项目

摘　　要：采用一种二维弱可压缩性的轴对称的涡模型,研究单个涡和光波阵面的相互干扰.对于低能量激光,在近场采用几何光学的分析方法.计算受干扰波阵面的光程差以及抖动角,确定通过涡的低密度区后会加速波阵面的变形,单体涡对光束有散焦作用.计算化学氧碘激光(COIL)通过涡之后的斯特列尔比,证明涡强对斯特列尔比有重要的影响.A weakly-compressible two-dimensional axisymmetric isentropic vortex model is employed to stimulate interactions between single vortex and single optical wavefront. For near-field aero-optics at low beam energies geometrical optics is adopted. Optical-path-difference of propagated distorted wavefront is computed. It is confirmed that transform of beam wavefront is accelerated as beam passing through the vortex with low density. Single vortex defocuses the beam. Computation on COIL indicates that strength of vortex has strong effect on Strehl rate.

关 键 词：涡 几何光学 光波阵面 化学氧碘激光 

分 类 号：O435[机械工程—光学工程]