激光与光电子学进展, 2020, 57 (19): 192601, 网络出版: 2020-10-17   

奇点光束模式叠加特性研究 下载: 970次

Research on Superposition Characteristics of Singularity Beam Mode
作者单位
华南师范大学广东省微纳光子功能材料与器件重点实验室, 广东 广州 510006
摘要
研究了奇点光束的叠加特性,从理论上分析奇点光束叠加后的相位分布和偏振分布,并用实验验证了理论推导的正确性。对同阶非相干涡旋光束叠加后的偏振态进行分析,发现叠加后的光束保持原有的轨道角动量,且光束的偏振态随方位角呈周期性变化,变化周期由涡旋拓扑荷值决定;分析了具有不同偏振拓扑荷值的柱矢量光束叠加后光场偏振态的变化规律。探究了既有相位奇点又有偏振奇点的柱矢量涡旋光束的叠加特性,发现叠加后的光束偏振态随方位角呈周期性变化,变化周期由涡旋拓扑荷值决定,光场各点的偏振态由涡旋拓扑荷值、偏振拓扑荷值及初始相位角共同决定。
Abstract
This paper studies the superposition characteristics of singularity beams, theoretically analyzes the phase distribution and polarization distribution after superposition of singularity beams, and experimentally verifies the correctness of the theoretical derivation. The polarization state of superimposed same-order non-coherent vortex beams is analyzed, and it is found that the superimposed beam maintains the original orbital angular momentum and the polarization state of the beam changes periodically with the azimuth. The change period is determined by the vortex topological charges. The variation of the polarization state of the light field after superposition of the cylindrical vector beams with different polarization topological charges is analyzed. The superposition characteristics of the cylindrical vector vortex beams with both phase singularities and polarization singularities are investigated, and it is found that the polarization state of the superposed beam varies periodically with the azimuth, where the change period is determined by the vortex topological charges. The polarization state of each point of the light field is determined by the vortex topological charge, polarization topological charge, and initial phase angle.

黄慧, 寿倩, 陈志超. 奇点光束模式叠加特性研究[J]. 激光与光电子学进展, 2020, 57(19): 192601. Hui Huang, Qian Shou, Zhichao Chen. Research on Superposition Characteristics of Singularity Beam Mode[J]. Laser & Optoelectronics Progress, 2020, 57(19): 192601.

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