We study the system of phase singularities ('singular skeleton') formed when a quasi-plane
wave (QPW) input beam diffracts at a double-phase-ramp (DPR) converter. The external (OV …

We analyze transformations of circular Laguerre–Gaussian beams with zero radial index
after passage through the double-phase-ramp (DPR) converter and study the behavior of …

A full theoretical and experimental analysis of the chain of phase singularities generated
when a Gaussian beam passes a double-phase-ramp converter is presented. The overall …

A double-phase-ramp (DPR) converter is known as an element introducing the screw
dislocation into an input beam with smooth wavefront, or increasing (decreasing) the …

The diffraction light field is studied by the numerical calculations of Kirchhoff-Fresnel integral
and Fourier analysis. Based on combination of these methods, the condition of an axial …

We numerically examine the spatial evolution of the structure of coherent and partially
coherent laser beams (PCBs), including the optical vortices, propagating in turbulent …

A generalized model of a double-wedge phase element containing two side-by-side parallel
phase ramps with arbitrary slope angles is proposed. We study the diffracted optical field of …

We describe the “functional” beam splitter that divides the incident beam into several
“derivative” ones and simultaneously introduces the prescribed transformation of their …

Abstract The structure of l= 0, 1 modes of weakly guiding anisotropic optical fibres rotating
around their symmetry axis is studied. It is demonstrated that for highly anisotropic fibres a …

The paper numerically investigates the spatial evolution of the structure of coherent and
partially coherent laser beams, including the optical vortices, propagating in turbulent …