LAUSR

The work is devoted to the study of caustics of vortex optical beams. An asymptotic method for calculating the caustic surfaces of vortex beams was developed. The formulation of the inverse problem of the formation of axial caustics of the required type is considered. It is shown that the presence of the vortex component leads to the formation of an axisymmetric caustic surface, the characteristic diameter of which increases with increasing topological charge.