New approach for the incoherent and coherent combination of Gaussian laser beams and observation of the spatial thinning of the combined beams by modes phase locking

TL;DR

This paper introduces a new theoretical method for combining Gaussian laser beams coherently and incoherently, enabling precise control of the combined beam's intensity profile and observing spatial thinning effects through mode phase locking.

Contribution

It presents a novel configuration and theoretical framework for laser beam combination, allowing accurate intensity calculations and revealing spatial thinning phenomena.

Findings

Incoherent combination yields Gaussian intensity without secondary lobes.

Coherent combination results in spatial thinning with increased intensity.

The spatial thinning depends on the system's numerical aperture.

Abstract

We report a new configuration and theoretical approach for the study of the incoherent and coherent combination of Gaussian laser beams which allows us to calculate the combined intensity at every point in space, this new approach consists of directing all the lasers towards a chosen point, which is the meeting point of all the combined lasers, this method makes it possible to obtain in the case of an incoherent combination an intensity of Gaussian shape without the existence of secondary intensity lobes at the focusing plan, and in the case of a coherent combination, we observe a spatial thinning of the combined beams with a greater intensity, which depends on the numerical aperture of the system.