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High throughput diffractive multi-beam femtosecond laser processing using a spatial light modulator
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DOI：10.1016/j.apsusc.2008.07.091.png)
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High throughput femtosecond laser processing is demonstrated by creating multiple beams using a spatial light modulator (SLM). The diffractive multi-beam patterns are modulated in real time by computer generated holograms (CGHs), which can be calculated by appropriate algorithms. An interactive LabVIEW program is adopted to generate the relevant CGHs. Optical efficiency at this stage is shown to be similar to 50% into first order beams and real time processing has been carried out at 50 Hz refresh rate. Results obtained demonstrate high precision surface micro-structuring on silicon and Ti6Al4V with throughput gain >1 order of magnitude. (C) 2008 Elsevier B. V. All rights reserved.
Keyword:
Femtosecond laser
Spatial light modulator (SLM)
Computer generated holograms (CGH)
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6.9
论文数:
6.2W
被引数:
19.4W
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