摘要
为研究高阶衍射级光束的轨道角动量,基于计算全息法在空间光调制器的傅里叶平面产生了不同衍射级的完美涡旋光束,并利用球面波干涉法对其拓扑荷值进行了测量。理论和实验结果表明不同衍射级p上的整数阶和分数阶完美涡旋光束的拓扑荷值l都满足l=mp的关系,其中m是相位掩模板的拓扑荷值。并进一步对不同衍射级的光学涡旋阵列进行了实验研究,结果表明光学涡旋阵列中光学涡旋的拓扑荷值满足l=p的关系,高阶衍射级上的衍射光束比+1级衍射光束具有更大的轨道角动量。该研究为光学涡旋及光学涡旋阵列进一步的研究及应用提供了理论和实验参考。
In order to study the orbital angular momentum of higher-order diffraction beams,based on the method of computer generated holography,the perfect vortex beam with different diffraction orders is generated on the Fourier plane of space light modulator,and its topological charge is measured by spherical wave interferometry.Theoretical and experimental results show that the topological charge l of integer and fractional perfect vortex beams at different diffraction order p satisfies the relation of l=mp,where m is the topological charge of the phase mask.Furthermore,the optical vortex array with different diffraction order is also studied experimentally,the results show that the topological charge of optical vortices satisfies the relation of l=p,and the higher-order diffraction beam has greater orbital angular momentum than the diffraction beam at the+1 order.This study provides theoretical and experimental reference for further research and application of optical vortices and optical vortex arrays.
作者
樊海豪
朱刘昊
台玉萍
李新忠
FAN Haihao;ZHU Liuhao;TAI Yuping;LI Xinzhong(School of Physics and Engineering,Henan University of Science and Technology,Luoyang 471023,China;School of Chemical Engineering and Pharmaceutics,Henan University of Science and Technology,Luoyang 471023,China;State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences,Xi’an 710119,China)
出处
《量子电子学报》
CAS
CSCD
北大核心
2022年第1期127-135,共9页
Chinese Journal of Quantum Electronics
基金
国家自然科学基金,11974102
河南省教育厅高等学校重点科研项目,21zx002
瞬态光学与光子学国家重点实验室,SKLST201901。
关键词
傅里叶光学
轨道角动量
计算全息
完美涡旋光束
光学涡旋阵列
Fourier optics
orbital angular momentum
computer generated holography
perfect vortex beam
optical vortex array
