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13 September 2002 Femtosecond and nanosecond laser removal of anodic oxide layers from aluminum
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Proceedings Volume 4760, High-Power Laser Ablation IV; (2002)
Event: International Symposium on High-Power Laser Ablation 2002, 2002, Taos, New Mexico, United States
Femtosecond and nanosecond laser ablation and delamination of anodic oxide layers on an aluminium alloy were investigated. Laser wavelengths of 800 nm (125 fs pulse duration) and 532 nm (7 ns), respectively, and two oxide layers with thicknesses of 70 micrometers (opaque) and 30 micrometers (transparent) were considered. Laser-induced shock waves measured by means of a microphone provided an in-situ diagnostic tool for the monitoring of the coating removal process. The transparent anodic oxides showed contrasting ablation mechanisms in the nanosecond and femtosecond pulse duration regime. Nanosecond pulses led to spallation, whereas femtosecond treatment resulted in ablation.
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Grazia Daminelli, Peter Meja, Anna Cortona, Joerg Krueger, Michel L. Autric, and Wolfgang Kautek "Femtosecond and nanosecond laser removal of anodic oxide layers from aluminum", Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002);

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