涡旋光束经过轴棱锥后的聚焦特性  

Focusing Properties of Vortex Beam with an Axicon

作　　者：刘晓云[1] 代雪峰[2] 单丽艳[1] 王楠[1] 徐送宁[1] 

机构地区：[1]沈阳理工大学理学院,辽宁沈阳110159 [2]东北大学理学院物理系,辽宁沈阳110004

出　　处：《激光与光电子学进展》2012年第2期152-156,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11004138)资助课题

摘　　要：研究了涡旋光束通过轴棱锥聚焦后的聚焦特性。利用惠更斯-菲涅耳衍射积分理论推导了涡旋光束经过轴棱锥聚焦后所获得的聚焦光强分布。数值模拟结果表明,涡旋光束经过轴棱锥聚焦后可获得高阶贝塞尔光束。研究了不同锥角的轴棱锥对涡旋光束聚焦特性的影响以及不同拓扑电荷数对聚焦特性的影响。结果表明,在轴棱锥对应的最大准直距离内,所获得的高阶贝塞尔光束保持了原有的无衍射特性。Focusing properties of the vortex beams with axicon is studied.The focusing intensity distribution of vortex beams with axicon by using Huygens-Fresnel diffractive integral is investigated.Numerical calculations show that after focused by the axicon,a vortex beam can convert into a high-order Bessel beam.The influence of by different cone angles of the axicon and the different topological number of the vortex beam on the focusing properties of vortex beam is investigated.The results show that in the maximum distance of the non-diffraction zone of the axicon,the obtained high-order Bessel beam keeps the original non-diffraction properties.

关 键 词：物理光学 涡旋光束 轴棱锥 高阶贝塞尔光束 

分 类 号：O436.1[机械工程—光学工程]