J_0相干角向偏振涡旋光束的深聚焦(英文) 被引量：1

Tight focusing of J_0 -correlated azimuthally polarized vortex beams

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摘要通过矢量德拜理论,研究了J0相干角向偏振涡旋光束深聚焦的性质。推导了在焦点区域的光强分布、光谱相干度和偏振度的表达式。数值模拟结果表明,光强分布、相干度和偏振度不仅依赖于相干长度和数值孔径最大角,而且依赖于拓扑电荷数。这种光束在焦平面还可获得非常小的焦点和焦洞。 By expanding the vectorial Debye theory into the tight focusing of J0-correlated field, the inten sity, correlation and polarization properties of J0-correlated azimuthally polarized vortex beams are studied. Ex pressions are derived for the intensity distribution, the spectral degree of coherence and the degree of polariza tion in the focal region. It is found that the intensity distributions, the degrees of correlation and the polarization of focused field are dependent not only on the correlation length and the numerical aperture maximal angle but also on the topological charge. It is also shown that such beam in the focal plane can obtain the highly confined focal spot and the focal hole.

作者饶连周林惠川许国忠

机构地区三明学院机电工程学院

出处《强激光与粒子束》 EI CAS CSCD 北大核心 2013年第8期1945-1950,共6页 High Power Laser and Particle Beams

基金 JK Research Project of the Education Bureau of Fujian Province(JK2011054) Important Engineering Project of the Education Bureau of Fujian Province(HX200804)

关键词深聚焦 J0相干涡旋光束偏振 tight focusing J0-correlated vortex beam polarization

分类号 TN241 [电子电信—物理电子学]

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参考文献1

1郭利娜,唐志列,梁重庆,谭治良.Characterization of tightly focused partially coherent radially polarized vortex beams[J].Chinese Optics Letters,2010,8(5):520-523. 被引量：6

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