Beam shaping for high-speed surface functionalisation

Alexander D. Griffiths; Bogusz Stępak; Persephone Poulton; Natalia Grudzień; Natalia Trela-McDonald

doi:10.1117/12.2690997

30 November 2023 Beam shaping for high-speed surface functionalisation

Alexander D. Griffiths, Bogusz Stępak, Persephone Poulton, Natalia Grudzień, Natalia Trela-McDonald

Proceedings Volume 12796, Functional Material Applications: From Energy to Sensing; 127960B (2023) https://doi.org/10.1117/12.2690997
Event: SPIE Photonex, 2023, Glasgow, United Kingdom

Abstract

Laser-Induced Periodic Surface Structures (LIPSS) can be produced using ultra-short (fs) pulsed lasers. The typical Gaussian profile of a single mode ultrafast fiber laser is not ideal, as the fluence across a spot varies. Laser beam shaping can reform the output spot into a square or rectangular shape with a flat-top profile, tailored to the fluence requirements of the application. We present initial results, surface nanotexturing of stainless steel at a rate of 6.8 cm² s ^-1 and efficiency of 0.38 cm² s ⁻¹ W⁻¹ with a 20 W average power laser. Further optimisation will allow the full output power range of the laser to be used to maximise throughput and efficiency. Beam shaping also provides improvements to black marking throughput, where the typical processing speed with a Gaussian spot is less than 0.04 cm² s ⁻¹ while shaped beam increases the productivity up to 0.44 cm² s ⁻¹ .

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Alexander D. Griffiths, Bogusz Stępak, Persephone Poulton, Natalia Grudzień, and Natalia Trela-McDonald "Beam shaping for high-speed surface functionalisation", Proc. SPIE 12796, Functional Material Applications: From Energy to Sensing, 127960B (30 November 2023); https://doi.org/10.1117/12.2690997

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