Titanium micromachining by femtosecond laser

Vural Kara, Huseyin Kizil*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The ultimate goal of this research was to characterize the ablation depth with respect to pulse energy, translation speed, and consecutive passes in order to obtain the parameters to have smooth microchannel surfaces. A logarithmic dependence of the channel depth on the laser pulse energy was observed with two different distinct ablation regimes. Although the same fluence values were used with two different lens sizes, the slopes of these ablation regimes were quite different. 100 mm lens has a small optical penetration length with steeper ablation slope in the first regime, whereas the 15 mm lens has the opposite. In the second part of the ablation regime, the slope was lower for 100 mm lens as compared to 15 mm lens. Furthermore, spike formation has been seen in 100 mm lens study at 0.308, 0.370, 0.431, and 0.493 J/cm2 fluence values yet no spike formations have been seen in 15 mm lens study.

Original languageEnglish
Pages (from-to)140-147
Number of pages8
JournalOptics and Lasers in Engineering
Volume50
Issue number2
DOIs
Publication statusPublished - Feb 2012

Keywords

  • Ablation depth
  • Ablation regime
  • Femtosecond laser
  • Spike formation

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