双曲余弦-高斯光束经微小孔衍射的轴上光强特性  

Axial light intensity characteristics of cosh-Gaussian beams diffracted by small aperture

作　　者：何仲[1] 康小平[1] 

机构地区：[1]琼州学院理工学院,海南三亚572022

出　　处：《应用光学》2013年第5期768-771,共4页Journal of Applied Optics

基　　金：教育部科学技术研究重点项目(208110);海南省自然科学基金项目(10801);琼州学院2010年度科研项目(QY515-201002)

摘　　要：基于横截面上精确表述的光强和瑞利-索末菲衍射积分公式,通过数值计算分析双曲余弦-高斯光束经微小孔衍射的轴上光强特性,详细讨论了偏心参数α、微小孔的孔径a和束腰宽度与波长之比w0/λ对双曲余弦-高斯光束轴上光强的影响。结果表明:双曲余弦-高斯光束的轴上光强分布依赖于偏心参数α、孔径a、w0/λ参数和传输距离。Base on the accurate expression of light intensity on the cross section and Rayleigh- Sommerfeld diffraction integrals, the characteristics of axial light intensity of cosh-Gaussian beams diffracted by a small aperture were analyzed and discussed by numerical calculation, and the influences of decentered parameter α, the radius of small aperture a and the parameter ω0 on the axial light intensity of cosh-Gaussian beams were also discussed in detail. Results show that the axial light intensity of cosh-Gaussian beams depends not only on the decentered parameter α, the radius of small aperture α and parameter ω0/λ, but also on the transmission distance.

关 键 词：双曲余弦-高斯光束 轴上光强 微小孔 衍射 

分 类 号：TN201[电子电信—物理电子学] O436[机械工程—光学工程]