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Towards crack-free ablation cutting of thin glass sheets with picosecond pulsed lasers
Author(s): Mingying Sun; Urs Eppelt; Claudia Hartmann; Wolfgang Schulz; Jianqiang Zhu; Zunqi Lin
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Paper Abstract

We investigated the morphology and mechanism of laser-induced damage in the ablation cutting of thin glass sheets with picosecond laser. Two kinds of damage morphologies observed on the cross-section of the cut channel, are caused by high-density free-electrons and the temperature accumulation, respectively. Notches and micro-cracks can be observed on the top surface of the sample near the cut edge. The surface micro-cracks were related to high energy free-electrons and also the heat-affected zone. Heat-affected-zone and visible-cracks free conditions of glass cutting were achieved by controlling the repetition rate and spatial overlap of laser pulses.

Paper Details

Date Published: 1 August 2017
PDF: 7 pages
Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 103390O (1 August 2017); doi: 10.1117/12.2272120
Show Author Affiliations
Mingying Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Urs Eppelt, Fraunhofer-Institut für Lasertechnik (Germany)
RWTH Aachen Univ. (Germany)
Claudia Hartmann, Fraunhofer-Institut für Lasertechnik (Germany)
Wolfgang Schulz, Fraunhofer-Institut für Lasertechnik (Germany)
RWTH Aachen Univ. (Germany)
Jianqiang Zhu, Shanghai Institute of Optics and Fine Mechanics (China)
Zunqi Lin, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 10339:
Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph, Editor(s)

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