无衍射J_0光束的理论分析  

Theoretical Analysis of Nondiffracting J_0 Beam

作　　者：邢笑雪[1] 吴逢铁[1] 张建荣[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2006年第1期31-34,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(A0410017)

摘　　要：由同一锥面上的平面波叠加,给出无衍射第一类零阶贝塞尔光束(无衍射J0光束)的解.利用衍射积分理论,导出平面波通过轴棱锥后的光场分布.数值模拟轴上光强和横截面光强的分布,结果证明无衍射光束的最大准直距离的模拟结果与几何光学近似完全吻合.同时,讨论光束半径和轴棱锥棱角对最大准直距离的影响.The solution of the zero order of the first kind Bessel beam （nondiffraeting J0 beam） is given by superposition of the plane waves whose wave vectors lies on the surface of a eone. By using the theory of diffracting integral, the optieal field distribution of plane waves passing through an axieon is derived. The optieal intensity distribution on the axis and that on the eross section are numerically simulated. It is shown that there is a good agreement between numerieal simulation and geometrieal optics approximation for the maximum eollimating distance Zmax of nondiffraeting beam. The effects of beam radius and eone angle of the axieon on the Zmax are also diseussed.

关 键 词：无衍射J0光束 轴棱锥 轴上光强 横截面光强 中心光斑尺寸 最大准直距离 

分 类 号：O437[机械工程—光学工程]