1 February 2000 Laser removal of the oxide layer on anodized aluminum
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Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376960
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan
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.
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Peter Meja, Peter Meja, Michel L. Autric, Michel L. Autric, Anne-Patricia B. Alloncle, Anne-Patricia B. Alloncle, } "Laser removal of the oxide layer on anodized aluminum", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); doi: 10.1117/12.376960; https://doi.org/10.1117/12.376960
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