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Fast parallel diffractive multi-beam femtosecond laser surface micro-structuring
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DOI：10.1016/j.apsusc.2009.02.043.png)
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Fast parallel femtosecond laser surface micro-structuring is demonstrated using a spatial light modulator (SLM). The Gratings and Lenses algorithm, which is simple and computationally fast, is used to calculate computer generated holograms (CGHs) producing diffractive multiple beams for the parallel processing. The results show that the finite laser bandwidth can significantly alter the intensity distribution of diffracted beams at higher angles resulting in elongated hole shapes. In addition, by synchronisation of applied CGHs and the scanning system, true 3D micro-structures are created on Ti6Al4V. (C) 2009 Elsevier B. V. All rights reserved.
Keyword:
Femtosecond laser
Spatial light modulator (SLM)
Computer generated holograms (CGHs)
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6.9
论文数:
6.2W
被引数:
19.4W
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Chromatic-distortion compensation in splitting and focusing of femtosecond pulses by use of a pair of diffractive optical elements.png)
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