Hole formation process in laser deep drilling with short and ultrashort pulses

Taras V. Kononenko; Sergei M. Klimentov; Serge V. Garnov; Vitali I. Konov; Detlef Breitling; Christian Foehl; Andreas Ruf; Joachim Radtke; Friedrich Dausinger

doi:10.1117/12.456901

25 February 2002 Hole formation process in laser deep drilling with short and ultrashort pulses

Taras V. Kononenko, Sergei M. Klimentov, Serge V. Garnov, Vitali I. Konov, Detlef Breitling, Christian Foehl, Andreas Ruf, Joachim Radtke, Friedrich Dausinger

Author Affiliations +

Proceedings Volume 4426, Second International Symposium on Laser Precision Microfabrication; (2002) https://doi.org/10.1117/12.456901
Event: Second International Symposium on Laser Precision Micromachining, 2001, Singapore, Singapore

Abstract

The drilling process in different materials (diamond, steel, ceramics and PMMA) was studied for a large range of pulse lengths from about 100 fs to 10 ns using different approaches. In transparent materials the penetration process was visualized with high-speed video analysis and microscopy. The drilling rate as well as the relation between processing energy density and ablation threshold were determined in situ. The penetration of the laser beam inside the channel and the influence of laser-ignited plasma were investigated by transmission measurements. Mechanisms of energy coupling and heat losses were examined by applying simple analytical calculations. Proposals for the basic understanding of the drilling process are presented.

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Taras V. Kononenko, Sergei M. Klimentov, Serge V. Garnov, Vitali I. Konov, Detlef Breitling, Christian Foehl, Andreas Ruf, Joachim Radtke, and Friedrich Dausinger "Hole formation process in laser deep drilling with short and ultrashort pulses", Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); https://doi.org/10.1117/12.456901

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