Coherent beam combining of optical vortices

TL;DR

This paper demonstrates the experimental power scaling of optical vortices through coherent beam combining across topological charges 1 to 5, achieving high efficiency and paving the way for high-intensity applications.

Contribution

It introduces a novel experimental method for coherently combining optical vortices with different topological charges using a fiber laser system.

Findings

Combining efficiency ranges from 83.2% to 96.9%.

Successful power scaling of optical vortices with topological charges 1 to 5.

Potential for high-intensity optical vortices in scientific and industrial applications.

Abstract

We experimentally demonstrate the power scaling of optical vortices by the coherent beam combining, encompassing topological charges ranging from l=1 to l=5 realized on the basis of a Yb-doped fiber short-pulsed laser system. The combining efficiency varies from 83.2 to 96.9% depending on the topological charge and beam pattern quality generated by the spatial light modulators. These results open a pathway to high-intensity optical vortices with enormous potential applications in science and industry by utilizing advances in light-matter interactions.