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20 June 2024 Laser induced periodic surface structures (LIPSS) on steel with high repetition rate femtosecond lasers: implications on pulse accumulation and debris redeposition.
Camilo Florian, Yasser Fuentes-Edfuf, Evangelos Skoulas, Emmanuel Stratakis, Santiago Sanchez-Cortes, Javier Solis, Jan Siegel
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Proceedings Volume PC13005, Laser + Photonics for Advanced Manufacturing ; PC130050M (2024) https://doi.org/10.1117/12.3022213
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
High repetition rate femtosecond lasers are commonly used for fabricating laser-induced periodic surface structures (LIPSS) over large areas at high processing speeds. Industrially relevant metals, like steel, experience thermal modifications at repetition rates beyond several hundred kilohertz. In this work, we fabricate low spatial frequency LIPSS (LSFL) on steel, varying pulse repetition rates from 10 kHz to 2 MHz. The study characterizes laser-structured areas and redeposited debris using SEM and μ-Raman spectroscopy. A simple heat dissipation model identifies repetition rate ranges associated with thermal modifications. Morphological changes and debris impact functional wetting behavior, offering insights for optimizing parameters in high repetition rate femtosecond laser materials processing.
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Camilo Florian, Yasser Fuentes-Edfuf, Evangelos Skoulas, Emmanuel Stratakis, Santiago Sanchez-Cortes, Javier Solis, and Jan Siegel "Laser induced periodic surface structures (LIPSS) on steel with high repetition rate femtosecond lasers: implications on pulse accumulation and debris redeposition.", Proc. SPIE PC13005, Laser + Photonics for Advanced Manufacturing , PC130050M (20 June 2024); https://doi.org/10.1117/12.3022213
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KEYWORDS
Femtosecond phenomena
Femtosecond pulse shaping
Pulsed laser operation
Red lasers
Fabrication
Laser irradiation
Scanning electron microscopy
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