非傍轴高斯光束通过小孔光阑衍射的轴上光强  

The axial intensity of nonparaxial Gaussian beams diffracted by a small aperture

作　　者：康小平[1] 吕百达[2] 

机构地区：[1]琼州大学物理系,五指山572200 [2]四川大学激光物理与化学研究所,成都610064

出　　处：《激光技术》2006年第3期332-333,336,共3页Laser Technology

基　　金：国家高技术课题资助项目(A823070)

摘　　要：基于瑞利衍射积分,不使用通常的近似Rλ(λ为波长),推导出非傍轴高斯光束通过小孔光阑衍射的轴上光强的精确解析表达式。并对传统的光强定义和光强的精确表述进行了比较研究。结果表明,两种定义之间的差异与f参数,截断参数δ和传输距离z有关。Based on the Rayleigh diffraction integral and without use of the usual approximation,R≥λ （ λ is wavelength）, an exact analytical expression for the axial intensity of nonparaxial Gaussian beams diffracted by a small circular aperture is derived. Then the conventional intensity definition and accurate intensity expression is comparatively studied. It is found that the difference between the two definitions depends on the f-parameter,truncation parameter δ and propagation distance z.

关 键 词：激光光学 瑞利衍射积分 非傍轴高斯光束 截断参数 f参数 

分 类 号：O435[机械工程—光学工程]