Fast calculation algorithms for diffraction of radially vortical laser fields on the microaperture

Algorithms based on Rayleigh)Sommerfeld diffractive integrals of the first type and plane wave decomposition for nonparaxial vector simulation of propagation of the laser fields limited by the aperture are considered. Comparison of the considered algorithms on an example of diffraction of a vortical conic wave on the microaperture in a near zone is accomplished. Efficiency of the offered nonparaxial vector algorithm based on plane wave decomposition taking into account radially)vortical symmetry is shown on accuracy and economy of computing resources.