1 山东师范大学物理与电子科学学院光场调控及应用中心,山东省光学与光子器件重点实验室, 山东 济南 250014
2 苏州大学物理科学与技术学院, 江苏 苏州 215006
涡旋光束具有螺旋波前、携带相位奇点和轨道角动量等物理特性,在粒子操控、量子信息、超分辨成像、光通信等领域具有重要的应用,并已成为学术界的研究热点。得益于相干光学理论的快速发展,将相干性作为新的自由度引入涡旋光束中,提出新型涡旋光束即部分相干涡旋光束。相较于完全相干涡旋光束,部分相干涡旋光束具有独特的物理内涵和光学特性,尤其是对其相干性和拓扑荷的联合调控会引发一系列奇特的新物理效应(如相干奇点、光束整形、偏振态转换、自修复等)。回顾了部分相干涡旋光束的基本理论及发展历程,着重对部分相干涡旋光束的理论模型、传输特性、实验产生、实验测量和应用基础研究进行了阐述。
物理光学 衍射与光栅 涡旋光束 相位奇点 相干性 相干奇点
Author Affiliations
Abstract
1 College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
2 Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China
It is known that one can determine the mode orders (i.e., the azimuthal order and radial order) of a partially coherent LGpl beam (i.e., a partially coherent vortex beam) based on the measurement of the cross-correlation function (CCF) and the double correlation function (DCF) together. The technique for measuring the CCF is known. In this Letter, we propose a method for measuring the DCF. Based on the proposed method, the determination of the mode orders of a partially coherent LGpl beam is demonstrated experimentally.
030.1670 Coherent optical effects 050.4865 Optical vortices 350.5500 Propagation Chinese Optics Letters
2017, 15(3): 030002
