20.500.12556/RUL-169328 In-situ measurements of residual heating during pulse-on-demand femtosecond laser surface microprocessing Femtosecond laser processing offers highly precise structuring with minimal residual heating of materials. However, at high average powers and pulse repetition rates, heating can limit process efficiency. The pulse-on-demand laser operation regime has proven to be an optimal solution for achieving high throughput and quality in laser microstructuring, independent of the scanner’s capabilities. Here, we present in situ measurements of residual heating during femtosecond laser microstructuring. By combining experimental observations with simulations, we investigate residual heat retention in various target materials and its associated effects. A high-speed thermal camera was employed for direct process monitoring, providing spatially and temporally resolved measurements of surface temperatures during laser microstructuring. The results were quantified using finite element–based numerical simulations of the material’s transient thermal response, enabling us to assess the conversion of laser power into unwanted residual heating. Surface topography measurements further contextualize the temperature data within the framework of microprocessing performance. We compare the effects of the pulse-on-demand regime with those observed in quasi-stationary cases, addressing both scanner acceleration compensation and advanced surface shaping achieved through laser repetition rate modulation algorithms. The pulse-on-demand regime’s ability to compensate for irregular scanner movements enables faster and more precise femtosecond laser processing of brittle and heat-sensitive materials. femtosecond laser laser microstructuring pulse-on-demand thermal imaging true false true Angleški jezik Ni določen Članek v reviji 2025-05-23 10:23:17 2025-05-23 10:23:23 2025-05-29 14:13:16 0000-00-00 00:00:00 2025 0 0 8 str. Vol. 190, art. 113201 Nov. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.375.826 0030-3992 10.1016/j.optlastec.2025.113201 236944643 Petelin_..._-Insitu_measurements.pdf Petelin_..._-Insitu_measurements.pdf 1 7B8C717E0C83C1620DEC0BAE36644796 84e3bad0668c1a9e9797fdea8647314bfd8175c3a484d1142d6c92ecdac3c128 32dd92f3-37ae-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210622 https://www.sciencedirect.com/science/article/pii/S0030399225007923 0 f6cb4d86-37ad-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210621 Fakulteta za strojništvo 0 0 0