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. (C)2011 Optical Society of America
Real time ablation rate measurement during high aspect-ratio hole drilling with a 120-ps fiber laser
Ancona A;LUGARA', Pietro Mario;DABBICCO, Maurizio;SCAMARCIO, Gaetano
2012-01-01
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. (C)2011 Optical Society of AmericaFile in questo prodotto:
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