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Proceedings Paper

Laser removal of the oxide layer on anodized aluminum
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Paper Abstract

In former laser removal experiments of 20 micrometers anodized aluminum layer in air, we found at 1064 nm and 532 nm wavelength a mechanical breaking of the film. In this paper, we present our photoacoustic measurement with a piezoceramic. The experiments were carried out with the aim to investigate the ablation mechanism in dependence on the energy density for 1064 nm and 248 nm laser wavelength. The main result is a strong change of the acoustic signal and shock wave velocity for the first and second laser pulse in amplitude and temporal behavior. To verify this, the experiments are repeated with an ultra fast camera, which allows to record the shock wave in the surrounding air and to visualize the breaking particles of 100 micrometers size. We found a changing of the ablation mechanism with the pulse number.

Paper Details

Date Published: 1 February 2000
PDF: 9 pages
Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); doi: 10.1117/12.376960
Show Author Affiliations
Peter Meja, Institute for Research on Non-Equilibrium Phenomena (France)
Michel L. Autric, Institute for Research on Non-Equilibrium Phenomena (France)
Anne-Patricia B. Alloncle, Institute for Research on Non-Equilibrium Phenomena (France)

Published in SPIE Proceedings Vol. 3885:
High-Power Laser Ablation II
Claude R. Phipps; Masayuki Niino, Editor(s)

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