多孔干涉仪检测光学涡旋拓扑态的研究

Distinguishing of Optical Vortices Based on Multipoint Interferometers

本文数值模拟了涡旋光束照射多孔干涉仪后的干涉光场分布,并发现其光强图样与干涉仪小孔个数N以及入射光涡旋态l有关.因此,仅通过对光强图样的分辨,即可检测入射光的涡旋态.另外,光强图样的尺寸与小孔孔径及小孔间距均成反比;整个干涉光场可以看作由多孔干涉所调制的单孔衍射.

We numerically calculated the interference field behind regular multipoint interferometers under illumination of optical vortex beam and discovered that the intensity patterns of such interference fields are related with both pinhole numbers and vorticity l of the incident light.Thus,l can be distinguished by reading the intensity patterns.Moreover,the size of such intensity pattern is inversely proportional to both the distance between pinholes and the aperture size of the pinholes.The whole intensity pattern can be regarded as the pinhole diffraction modulated by the interference between the multiple pinholes.