Benjamin Lauer

TL;DR: In this paper, the burst mode for ps and fs pulses for steel and copper was investigated and it was found that the reduction of the energy in a single pulse (in the burst) represents the main factor for the often reported gain in the removal rate using burst mode e.g. for steel no investigated burst sequence lead to a higher removal rate compared to single pulses at higher repetition rate.

TL;DR: In this paper, a systematic study of the removal rate and machining quality for different types of steel and for pulse durations of several 100 fs to few ns was presented, and it was found that removal rate for metals strongly depends on the pulse duration.

TL;DR: In this article, the removal rate for steel and copper was determined for different pulse durations and different spot sizes using the following three different methods: With the first method the removal rates were calculated from the threshold fluence and the energy penetration depth deduced by machining craters at low repetition rates, measuring its depths and using the logarithmic ablation law.

TL;DR: In this paper, a systematic study of the removal rate and machining quality for this longer pulse durations is presented and the results are compared with the previous ones for pulses of several 100fs to 50ps.

TL;DR: In this paper, a 2D axisymmetric thermomechanical model was developed to qualitatively illustrate the mechanism behind these phenomena, and the deviation of the experimental results from the simulation model is attributed to the fact that this static approach can provide good explanations of the cold ablation with ultrashort pulsed laser.