Cylindrical vector beams and vortex beams, two types of typical singular optical beams
characterized by axially symmetric polarization and helical phase front, possess the unique …

Angular momentum, a fundamental physical quantity, can be divided into spin angular
momentum (SAM) and orbital angular momentum (OAM) in electromagnetic waves. Helically …

An optical vortex having an isolated point singularity is associated with the spatial structure
of light waves. A polarization vortex (vector beam) with a polarization singularity has …

Structured light, with spatially varying phase or polarization distributions, has given rise to
many novel applications in fields ranging from optical communication to laser-based …

Based on 5 requirements which are essential for stable OAM mode transmission, we
propose an OAM fiber family based on a structure of circular photonic crystal fiber (C-PCF) …

Optical orbital angular momentum (OAM) has become a hot research topic because of its
unique properties due to its spiral distribution of phases. The production and transmission of …

The promise of the infinite-dimensionality of orbital angular momentum (OAM) and its
application to free-space and fiber communications has attracted immense attention in …

We demonstrate orbital-angular momentum (OAM) light up to a topological charge of l= 3
behind a single mode fiber. Femtosecond 3D direct laser writing is used to fabricate spiral …

A light beam may be separated into its orbital-angular momentum (OAM) components by a
geometric optical transformation that converts each OAM component into a plane wave with …

We examine mode couplings in chiral fiber grating (CFG) with N-fold rotation symmetry in
the cross section and show how the angular momentum matching condition in couplings …