Laser self-mixing sensor to monitor in-situ the penetration depth during short pulse laser drilling of metal targets

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Abstract

Direct real-time measurements of the penetration depth during laser micromachining has been demonstrated by developing a novel ablation sensor based on laser diode feedback interferometry. Percussion drilling experiments have been performed by focusing a 120-ps pulsed fiber laser onto metallic targets with different thermal conductivity. In-situ monitoring of the material removal rate was achieved by coaxially aligning the beam probe with the ablating laser. The displacement of the ablation front was revealed with sub-micrometric resolution by analyzing the sawtooth-like induced modulation of the interferometric signal out of the detector system.

Autore Pugliese

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  • Mezzapesa F.P.; Ancona A.; Sibillano T.; De Lucia F.; Dabbicco M.; Lugarà P.M.; Scamarcio G.

Titolo volume/Rivista

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Anno di pubblicazione

2011

ISSN

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ISBN

9780819486783

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Settori ERC

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