| 非傍轴高斯光束通过小孔光阑衍射的轴上光强 |
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| 引用本文： | 康小平,吕百达.非傍轴高斯光束通过小孔光阑衍射的轴上光强[J].激光技术,2006,30(3):332-333,336. |
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| 作者姓名： | 康小平 吕百达 |
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| 作者单位： | 1.琼州大学, 物理系, 五指山, 572200; |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 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。
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| 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 |
| 文章编号： | 1001-3806（2006）03-0332-02 |
| 收稿时间： | 2004-12-20 |
| 修稿时间： | 2004-12-202005-02-24 |
The axial intensity of nonparaxial Gaussian beams diffracted by a small aperture |
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| KANG Xiao-ping,L Bai-da.The axial intensity of nonparaxial Gaussian beams diffracted by a small aperture[J].Laser Technology,2006,30(3):332-333,336. |
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| Authors: | KANG Xiao-ping L Bai-da |
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| Affiliation: | 1. Department of Physics, Qiongzhou University, Wuzhishan 572200, China; 2. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China |
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| Abstract: | 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. |
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| Keywords: | laser optics Rayleigh diffraction integral nonparaxial Gaussian beam truncation parameter f-parameter |
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