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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 9 — May. 5, 2014
  • pp: 11312–11324

Heat accumulation during pulsed laser materials processing

Rudolf Weber, Thomas Graf, Peter Berger, Volkher Onuseit, Margit Wiedenmann, Christian Freitag, and Anne Feuer  »View Author Affiliations


Optics Express, Vol. 22, Issue 9, pp. 11312-11324 (2014)
http://dx.doi.org/10.1364/OE.22.011312


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Abstract

Laser materials processing with ultra-short pulses allows very precise and high quality results with a minimum extent of the thermally affected zone. However, with increasing average laser power and repetition rates the so-called heat accumulation effect becomes a considerable issue. The following discussion presents a comprehensive analytical treatment of multi-pulse processing and reveals the basic mechanisms of heat accumulation and its consequence for the resulting processing quality. The theoretical findings can explain the experimental results achieved when drilling microholes in CrNi-steel and for cutting of CFRP. As a consequence of the presented considerations, an estimate for the maximum applicable average power for ultra-shorts pulsed laser materials processing for a given pulse repetition rate is derived.

© 2014 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.6810) Lasers and laser optics : Thermal effects

ToC Category:
Laser Microfabrication

History
Original Manuscript: February 24, 2014
Revised Manuscript: March 29, 2014
Manuscript Accepted: March 31, 2014
Published: May 2, 2014

Citation
Rudolf Weber, Thomas Graf, Peter Berger, Volkher Onuseit, Margit Wiedenmann, Christian Freitag, and Anne Feuer, "Heat accumulation during pulsed laser materials processing," Opt. Express 22, 11312-11324 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-9-11312


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