Since the second half of the 20th century, ideas to develop methods for the formation of
optical vortices (OVs) or OV beams–regions of circular motion of energy flow in an …

A new technique for measuring the degenerate spectra of optical vortices and orbital
angular momentum (OAM) of singular beams is theoretically studied and experimentally …

We found that small perturbations of the optical vortex core in Laguerre–Gaussian (LG)
beams generate a fine structure of the Hermite–Gaussian (HG) mode spectrum in the form of …

In the general case, upon free-space propagation of a paraxial optical vortex (OV) its
topological charge (TC) is not conserved, unlike the orbital angular momentum (OAM) …

Two simple and high-efficiency techniques for measuring the orbital angular momentum
(OAM) of paraxial laser beams are proposed and studied numerically and experimentally …

This book is devoted to the consideration of unusual laser beams–vortex or singular beams.
It contains many numerical examples, which clearly show how the phase of optical vortices …

A relationship for the complex amplitude of generalized paraxial Hermite–Gaussian (HG)
beams is deduced. We show that under certain parameters, these beams transform into the …

We investigate the transformation of structured Laguerre–Gaussian (sLG) beams after
passing through a cylindrical lens. The resulting beam, ab astigmatic structured Laguerre …

We demonstrate an easy two-step maskless method for the fabrication of so-called
compound fork-shaped gratings in nanomultilayer structures (NMLSs) based on …

The composite optical beams being a result of superposition, are a promising way to study
the orbital angular momentum and its effects. Their wide range of applications makes them …