Articolo in rivista, 2012, ENG

Real time ablation rate measurement during high aspect-ratio hole drilling with a 120-ps fiber laser

Mezzapesa, FP (Mezzapesa, Francesco P.)1,2,3; Sibillano, T (Sibillano, Teresa)3; Di Niso, F (Di Niso, Francesca)1,2; Ancona, A (Ancona, Antonio)3; Lugara, PM (Lugara, Pietro M.)1,2,3; Dabbicco, M (Dabbicco, Maurizio)1,2,3; Scamarcio, G (Scamarcio, Gaetano)1,2,3

1. Univ Bari, Dipartimento Interateneo Fis, I-70126 Bari, Italy 2. Politecn Bari, I-70126 Bari, Italy 3. CNR IFN UOS Bari, I-70126 Bari, Italy

We report on the instantaneous detection of the ablation rate as a function of depth during ultrafast microdrilling of metal targets. The displacement of the ablation front has been measured with a sub-wavelength resolution using an all-optical sensor based on the laser diode self-mixing interferometry. The time dependence of the laser ablation process within the depth of aluminum and stainless steel targets has been investigated to study the evolution of the material removal rate in high aspect-ratio micromachined holes.

Optics express 20 (1), pp. 663–671

Keywords

CNR authors

Dabbicco Maurizio, Scamarcio Gaetano, Mezzapesa Francesco Paolo, Lugara Pietro Mario, Sibillano Teresa, Ancona Antonio

CNR institutes

IFN – IFN - Sede secondaria di Bari