title: Real time ablation rate measurement during high aspect-ratio hole drilling with a 120-ps fiber laser.
abstract: 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.
authors.affiliation: Dipartimento Interateneo di Fisica, Università degli Studi e Politecnico di Bari, via Amendola 173, I-70126 Bari, Italy. francesco.mezzapesa@uniba.it
authors.forename: Francesco P
authors.initials: FP
authors.lastname: Mezzapesa
authors.forename: Teresa
authors.initials: T
authors.lastname: Sibillano
authors.forename: Francesca
authors.initials: F
authors.lastname: Di Niso
authors.forename: Antonio
authors.initials: A
authors.lastname: Ancona
authors.forename: Pietro M
authors.initials: PM
authors.lastname: Lugarà
authors.forename: Maurizio
authors.initials: M
authors.lastname: Dabbicco
authors.forename: Gaetano
authors.initials: G
authors.lastname: Scamarcio
mesh_terms: D003199:Computer Systems; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D007834:Lasers; D008670:Metals / Q000737:chemistry* / Q000528:radiation effects*; D014159:Transducers
chemical_list: D008670:Metals