环形涡旋光干涉叠加形成复合涡旋光的特性研究

Characteristics of composite vortex formed by overlay of two annulus vortexes

采用数值模拟的方法对2束以高斯光束为背景的环形涡旋光相互叠加产生的复合涡旋进行研究,提出了一种求解共线叠加复合涡旋位置的图解方法,利用该方法可以得到准确的涡旋位置分布特性。研究表明,通过改变涡旋光的拓扑荷值以及束腰半径,复合涡旋光的奇点和强度分布都会发生改变,形成新的复合涡旋光场。

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.