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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 10 — May. 19, 2014
  • pp: 12200–12210

Role of heat accumulation on the incubation effect in multi-shot laser ablation of stainless steel at high repetition rates

Francesca Di Niso, Caterina Gaudiuso, Teresa Sibillano, Francesco Paolo Mezzapesa, Antonio Ancona, and Pietro Mario Lugarà  »View Author Affiliations

Optics Express, Vol. 22, Issue 10, pp. 12200-12210 (2014)

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We study the incubation effect during laser ablation of stainless steel with ultrashort pulses to boost the material removal efficiency at high repetition rates. The multi-shot ablation threshold fluence has been estimated for two pulse durations, 650-fs and 10-ps, in a range of repetition rates from 50kHz to 1 MHz. Our results show that the threshold fluence decreases with the number of laser pulses N due to damage accumulation mechanisms, as expected. Moreover, approaching the MHz regime, the onset of heat accumulation enhances the incubation effect, which is in turn lower for shorter pulses at repetition rates below 600 kHz. A saturation of the threshold fluence value is shown to occur for a significantly high number of pulses, and well fitted by a modified incubation model.

© 2014 Optical Society of America

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(140.3390) Lasers and laser optics : Laser materials processing
(140.6810) Lasers and laser optics : Thermal effects
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors

ToC Category:
Laser Microfabrication

Original Manuscript: February 20, 2014
Revised Manuscript: April 10, 2014
Manuscript Accepted: April 11, 2014
Published: May 13, 2014

Francesca Di Niso, Caterina Gaudiuso, Teresa Sibillano, Francesco Paolo Mezzapesa, Antonio Ancona, and Pietro Mario Lugarà, "Role of heat accumulation on the incubation effect in multi-shot laser ablation of stainless steel at high repetition rates," Opt. Express 22, 12200-12210 (2014)

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