摘要
利用干涉理论对无衍射贝塞尔光束经轴棱锥线聚焦后产生的周期局域空心光束进行描述。计算了产生的局域空心光束的最大无衍射距离。采用几何光学理论和干涉理论对轴棱锥聚焦无衍射光束进行分析,并利用MathCAD软件对沿传输距离变化的光强分布和一个周期内光强的演变情况及对应的光斑图进行数值模拟。实验中采用一个底角为1°的轴棱锥来产生无衍射贝塞尔光束,再经第二个底角为2°的轴棱锥对无衍射贝塞尔光束进行聚焦,通过显微镜和CCD照相机系统对光束进行观察和拍摄,实验和模拟结果相吻合。
Description of interference theory on generated period bottle beam by focus non-diffracting beams is used. The biggest non-diffracting distance of bottle beam is calculated. The non-diffracting beam focused by axicon is analyzed by geometrical optics theory and interference theory. The intensity distributions along the propagation distance, the intensity evolution of the bottle beams in a complete period and the corresponding spot diagram are simulated by the MathCAD software, In terms of experiments, non-diffracting Bessel beam is generated by an axicon with base angle of 1°, and then is focused by another axicon with base angle of 2°. The beam is observed by a microscope and is photographed by a CCD camera. The experimental results are agree well with theoretical analysis.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2013年第9期103-107,共5页
Acta Optica Sinica
基金
国家自然科学基金(61178015)
福建省自然科学基金(2012J01278)
泉州市科技重点项目(2011G9)
