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Proceedings Paper

Surface processing of stainless steel with high-energy picosecond laser pulses with an elliptical focus
Author(s): Ehsan Zahedi; Rudolf Weber; Thomas Graf
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Paper Abstract

A combination of a cylindrical lens with a spherical lens was used to create an elliptical beam shape on the surface of the processed workpieces in order to increase the ablation efficiency producing linear grooves. Near-infrared 8 ps laser pulses with energies of up to 2.3 mJ were applied at a repetition rate of 300 kHz to ablate the grooves on the surface of the samples. The ablation rates obtained at different feed rates were examined. At a peak fluence of 4 J/cm2, an power specific ablation rate of almost 0.4 mm3/min/W was achieved for a beam with an ellipticity of 0.9955.

Paper Details

Date Published: 17 February 2017
PDF: 6 pages
Proc. SPIE 10092, Laser-based Micro- and Nanoprocessing XI, 1009206 (17 February 2017); doi: 10.1117/12.2250135
Show Author Affiliations
Ehsan Zahedi, Institut für Strahlwerkzeuge (Germany)
Rudolf Weber, Institut für Strahlwerkzeuge (Germany)
Thomas Graf, Institut für Strahlwerkzeuge (Germany)

Published in SPIE Proceedings Vol. 10092:
Laser-based Micro- and Nanoprocessing XI
Udo Klotzbach; Kunihiko Washio; Rainer Kling, Editor(s)

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