Thirty years ago, Coullet et al. proposed that a special optical field exists in laser cavities
bearing some analogy with the superfluid vortex. Since then, optical vortices have been …

Preparation, control, and measurement of optical vortices are increasingly important, as they
play essential roles in both fundamental science and optical technology applications. Spatial …

In this review, starting with the essence of phase singularities (Sect. 1) and continuing with
the methods for the generation of singular beams of different kind (Sect. 2), we concentrate …

Spatial light modulators (SLMs) are popular tools for generating structured light fields and
have fostered numerous applications in optics and photonics. Here, we explore the limits of …

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 …

We propose and experimentally demonstrate a noninterferometric method to quantitatively
determine the topological charge and complete phase structure of a vortex beam scrambled …

We propose a new method to determine topological charge by using an improved Fizeau
interferometer. This interferometer is very easy to realize, as well as interference fringes are …

Diffraction patterns of optical vortex beams (VBs) by differently shaped apertures are used to
determine their topological charge (TC). In this paper, we show by simulations and …

Higher orders of orbital angular momentum states (OAMs) of light have been produced with
a double-pass configuration through a zero-order vortex half-wave retarder (VHWR). This …