<title>Geometro-optical models in singular optics</title>

Abstract

Geometro-optical (GO) models were used to describe the properties of light fields having helical wave front structure inside the resonant cavity. The quantization rules of the , ray packs dimensions of screw modes in cavity were defined. To describe helical fields with nonuniform azimuthal rotation of the phase a method combining the potentialities of the ray approach with those of composition of Gaussian rays method was used.