摘要
提出了一种基于数字全息技术测定涡旋光束拓扑电荷数的方法.该方法通过数字全息技术获取涡旋光束和参考光的全息图并重构出涡旋光束的波前相位,判定相位围绕相位奇点的周期性分布来测定涡旋光束的拓扑电荷数.在拓扑电荷数取值分别为整数和分数的情况下,通过对数值模拟和实验结果的比较,表明该方法能够较准确地测定出拓扑电荷数.
In this paper we propose a method to detect the topology charge of vortex beam using digital holography. Hologram of vortex beam interference with reference beam is recorded, and the phase of vortex beam is reconstructed. The topology charge can be accurately determined by judging the periodicity of reconstructed phase distribution around the phase singularity. The phases of vortex beams generated by numerical simulation and those obtained by experiment of vortex beams with integral and fractional topology charges are compared with each other. The feasibility of the method of detecting the topology charge of vortex beam using digital holography is proved by comparing the results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第24期215-222,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:61377003
11104120)
南京师范大学高层次人才科研启动项目(批准号:184080H20162)
江苏省高校自然科学研究重大项目(批准号:14KJA140001)
南京师范大学青年领军人才培养项目(批准号:184080H20178)资助的课题~~
关键词
涡旋光束
拓扑电荷数
数字全息
相位重构
vortex beam，topology charge，digital holography，phase reconstruction
