Management of the orbital angular momentum of vortex beams in a quadratic nonlinear interaction

TL;DR

This paper investigates how the orbital angular momentum of vortex beams can be controlled in quadratic nonlinear interactions, specifically through seeded second harmonic generation, with theoretical and numerical analysis.

Contribution

It introduces a theoretical and numerical framework for managing the orbital angular momentum in quadratic nonlinear optical processes, focusing on seeded second harmonic generation with vortices.

Findings

Orbital angular momentum can be controlled via quadratic nonlinear interactions.

On-axis and off-axis vortices influence the angular momentum transfer.

Examples demonstrate effective management of vortex beam properties.

Abstract

Light intensity control of the orbital angular momentum of the fundamental beam in a quadratic nonlinear process is theoretically and numerically presented. In particular we analyzed a seeded second harmonic generation process in presence of orbital angular momentum of the interacting beams due both to on axis and off axis optical vortices. Examples are proposed and discussed.