Open AccessImproved laser glass cutting by spatio-temporal control of energy deposition using bursts of femtosecond pulses
Author(s) -
Konstantin Mishchik,
R. Beuton,
O. Dematteo Caulier,
Stefan Skupin,
B. Chimier,
Guillaume Duchateau,
Bruno Chassagne,
Rainer Kling,
Clemens Hönninger,
Eric Mottay,
John Lopez
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.033271
Subject(s) - femtosecond , optics , materials science , laser , beam (structure) , deposition (geology) , pulse (music) , volume (thermodynamics) , diffraction efficiency , plasma , diffraction , physics , paleontology , quantum mechanics , sediment , detector , biology
International audienceWe demonstrate the advantage of combining non-diffractive beam shapes and femtosecond bursts for volume laser processing of transparent materials. By redistribution of the single laser pulse energy into several sub-pulses with 25 ns time delay, the energy deposition in the material can be enhanced significantly. Our combined experimental and theoretical analysis shows that in burst-mode detrimental defocusing by the laser generated plasma is reduced, and the non-diffractive beam shape prevails. At the same time, heat accumulation during the interaction with the burst leads to temperatures high enough to induce material melting and even in-volume cracks. In an exemplary case study, we demonstrate that the formation of these cracks can be controlled to allow high-speed and high-quality glass cutting