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

doi:10.1117/12.3022213

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

Author Affiliations +

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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