Towards crack-free ablation cutting of thin glass sheets with picosecond pulsed lasers

Mingying Sun; Urs Eppelt; Claudia Hartmann; Wolfgang Schulz; Jianqiang Zhu; Zunqi Lin

doi:10.1117/12.2272120

1 August 2017 Towards crack-free ablation cutting of thin glass sheets with picosecond pulsed lasers

Mingying Sun, Urs Eppelt, Claudia Hartmann, Wolfgang Schulz, Jianqiang Zhu, Zunqi Lin

Proceedings Volume 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers; 103390O (2017) https://doi.org/10.1117/12.2272120
Event: Pacific Rim Laser Damage 2017: Optical Materials for High Power Lasers, 2017, Shanghai, China

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.

Citation Download Citation

Mingying Sun, Urs Eppelt, Claudia Hartmann, Wolfgang Schulz, Jianqiang Zhu, and Zunqi Lin "Towards crack-free ablation cutting of thin glass sheets with picosecond pulsed lasers", Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 103390O (1 August 2017); https://doi.org/10.1117/12.2272120

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