Herein, we have discussed three major methods which have been generally employed for
the generation of optical beams with orbital angular momentum (OAM). These methods …

The rapid development of optical technologies, such as optical manipulation, data
processing, sensing, microscopy, and communications, necessitates new degrees of …

There are great challenges in the generation of higher-order modes for long period fiber
grating (LPFG). The cross-coupling coefficient between the fundamental mode and the …

In the last three decades, light's orbital angular momentum (OAM) has been of great interest
because it has unique characteristics that make it sought after in many research fields …

This paper examines the spectral properties of a spiral phase plate (SPP) generating orbital
angular momentum (OAM) beams. A simple method is proposed for calculating the resulting …

In this paper, we propose and experimentally demonstrate a vortex random fiber laser (RFL)
with a controllable orbital angular momentum (OAM) mode. The topological charge of the …

Vortex beams with an orbital angular momentum (OAM) are extremely important in optical
trapping, optical micromachining, high-capacity optical communications, and quantum …

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 …

In this paper, the radially polarized (RP) new kind of power-exponent-phase vortex (NPEPV)
beam, with rotationally symmetrical phase structure, was introduced and the tightly focused …

We discuss the nonparaxial focusing of laser light into a three-dimensional (3D) spiral
distribution. For calculating the tangential and normal components of the electromagnetic …