20.500.12556/RUL-145314 Pulse-on-demand operation for precise high-speed UV laser microstructuring 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. fiber lasers UV lasers nanosecond lasers pulse-on-demand material processing vlakenski laserji UV laserji nanosekundni laserji pulzi na zahtevo obdelava materialov true false true Angleški jezik Slovenski jezik Članek v reviji 2023-04-17 09:47:14 2023-04-17 09:47:19 2023-04-18 03:32:55 0000-00-00 00:00:00 2023 0 0 11 str. iss. 4, art. 843 Vol. 14 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535:621.7+621.9 2072-666X 10.3390/mi14040843 149330179 Kocica...-Pulse-on-demand_operation_for_precise_high-speed_UV_laser_microstructuring.pdf Kocica...-Pulse-on-demand_operation_for_precise_high-speed_UV_laser_microstructuring.pdf 1 DA5F303FA916FFD99CB62C32F4E60804 856f1772c0dddd580aba13485fb0ecb8d13c47291c2d646ab10b435430fb72e4 3ceed33c-dcf4-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168136 https://www.mdpi.com/2072-666X/14/4/843 1 ec62da60-dcf3-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168135 Fakulteta za strojništvo 0 0 0