关键词: 环形涡旋, 涡旋干涉, 数值模拟, 拓扑荷

Abstract:

We address the composite vortex superposed by two annulus vortexes with numerical simulation, whose background beam is Gaussian beam. We further present a graphical method to get the position of collinear superposition vortex, by which we can obtain the accurate distribution characteristics of the vortex position. Results show that the singularities and intensity distribution of the composite optical vortices will change with topological charge value and beam waist radius.

Key words: annulus vortex, vortex interference, numerical simulation, topological charge