【摘要】 对两束拓扑电荷m1,2=±1的平行、离轴平顶高斯涡旋光束在束腰面叠加形成的合成光涡旋及其在自由空间的传输做了研究.详细的数值计算和分析表明,合光涡旋的位置、数目和净拓扑电荷与光束的控制参数,包括相对位相,振幅比,束腰宽度比,相对离轴参数,光束阶数,以及传输距离有关,但拓扑电荷不总是守恒.更多还原

【Abstract】 The composite optical vortices（OVs） in the superimposed field of two parallel,off-axis flattened Gaussian vortex beams with topological charge m₁,2=±1 at the waist plane and their propagation dynamics in free space are studied.Detailed numerical calculations and analysis show that the number,position and net topological charge of composite OVs depend on the control parameter,such as the relative phase,amplitude ratio,waist-width ratio,relative off-axis distance,beam order,and on the propagation distance,but the topological charge is not always conserved.更多还原