Beam shaping for ultrafast materials processing

TL;DR

This paper explores advanced beam shaping techniques for ultrafast lasers, demonstrating how tailored 3D focus distributions improve material processing tasks like cutting, welding, and drilling.

Contribution

It introduces novel 3D beam shaping strategies, including Bessel-like profiles and flat-top focuses, optimized via digital holography for enhanced processing quality.

Findings

Improved cutting, welding, and drilling quality with tailored beam profiles.

Effective use of in situ diagnostics for optimizing beam shapes.

Demonstrated benefits of 3D beam shaping in ultrafast laser applications.

Abstract

The remarkable temporal properties of ultra-short pulsed lasers in combination with novel beam shaping concepts enable the development of completely new material processing strategies. We demonstrate the benefit of employing focus distributions being tailored in all three spatial dimensions. As example advanced Bessel-like beam profiles, 3D-beam splitting concepts and flat-top focus distributions are used to achieve high-quality and efficient results for cutting, welding and drilling applications. Spatial and temporal in situ diagnostics is employed to analyze light-matter interaction and, in combination with flexible digital-holographic beam shaping techniques, to find the optimal beam shape for the respective laser application.