Optimized Laser Material Processing with Tailored Focal Intensity Distributions

摘要

Gaussian intensity profiles are widely used in the field of laser material processing. Nevertheless, there are applications,where the inhomogeneous beam profile is not acceptable. We show that refractive beam shaping systems provide verygood results for generating tailored focal intensity distributions, e.g. top-hat or doughnut shaped profiles. Even thoughusing just one beam shaping system the width of the profiles is scalable. The device is suitable for working with ascanner and F-Theta lens as commonly used for material processing. Results of material processing of steel are comparedfor different focal intensity distributions.