Jernej Jan Kočica (Author), Jaka Mur (Author), Julien Didierjean (Author), Arnaud Guillossou (Author), Julien Saby (Author), Jaka Petelin (Author), Girolamo Mincuzzi (Author), Rok Petkovšek (Author)

Abstract

Laser microstructuring has been studied extensively in the last decades due to its versatile, contactless processing and outstanding precision and structure quality on a wide range of materials. A limitation of the approach has been identified in the utilization of high average laser powers, with scanner movement fundamentally limited by laws of inertia. In this work, we apply a nanosecond UV laser working in an intrinsic pulse-on-demand mode, ensuring maximal utilization of the fastest commercially available galvanometric scanners at scanning speeds from 0 to 20 m/s. The effects of high-frequency pulse-on-demand operation were analyzed in terms of processing speeds, ablation efficiency, resulting surface quality, repeatability, and precision of the approach. Additionally, laser pulse duration was varied in single-digit nanosecond pulse durations and applied to high throughput microstructuring. We studied the effects of scanning speed on pulse-on-demand operation, single- and multipass laser percussion drilling performance, surface structuring of sensitive materials, and ablation efficiency for pulse durations in the range of 1–4 ns. We confirmed the pulse-on-demand operation suitability for microstructuring for a range of frequencies from below 1 kHz to 1.0 MHz with 5 ns timing precision and identified the scanners as the limiting factor even at full utilization. The ablation efficiency was improved with longer pulse durations, but structure quality degraded.

Keywords

vlakenski laserji;UV laserji;nanosekundni laserji;pulzi na zahtevo;obdelava materialov;fiber lasers;UV lasers;nanosecond lasers;pulse-on-demand;material processing;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 535:621.7+621.9
COBISS: 149330179 Link will open in a new window
ISSN: 2072-666X
Views: 13
Downloads: 0
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Other data

Secondary language: Slovenian
Secondary keywords: vlakenski laserji;UV laserji;nanosekundni laserji;pulzi na zahtevo;obdelava materialov;
Type (COBISS): Article
Pages: str. 1-11
Volume: ǂVol. ǂ14
Issue: ǂiss. ǂ4
Chronology: 2023
DOI: 10.3390/mi14040843
ID: 18625355