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Št. zadetkov: 5
Nadzor in krmiljenje modularnih laserskih sistemov
Jernej Jan Kočica, Rok Petkovšek
Magistrsko delo
Oznake: nadzor krmiljenje vlakenski laserji modularnost FPGA;
V okviru magistrske naloge je bil zasnovan sistem, ki ga nadzorujemo s pomočjo kontrolne enote (FPGA ali mikrokrmilnik) preko SPI protokola. Sistem ima modularno zasnovo, ki omogoča izgradnjo poljubno kompleksnega sklopa s pomočjo krmilnih modulov. En krmilni modul nudi 4 kanale digitalno-analognega ...
Leto: 2018 Vir: Fakulteta za strojništvo (UL FS)
Laser-based material interactions and ablation processes by bursts of 70 ps pulses
Jernej Jan Kočica, Jaka Mur, Jaka Petelin, Rok Petkovšek
Izvirni znanstveni članek
Oznake: laser processing;bursts of pulses;surface engineering;laser ablation;
The intermediate pulse duration regime between typical ultra-short and nanosecond pulses has been investigated using MHz-range bursts of 70 ps pulses emitted from a custom-made fiber laser source. The goal of this study was to observe and understand the processes involved during laser ablation on th ...
Leto: 2021 Vir: Fakulteta za strojništvo (UL FS)
Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing
Jaka Petelin, Luka Černe, Jaka Mur, Vid Agrež, Jernej Jan Kočica, Jörg Schille, Udo Loeschner, Rok Petkovšek
Izvirni znanstveni članek
Oznake: arbitrary repetition rate;fiber lasers;gain control;high speed processing;pulse-on-demand;
In this manuscript we present a true pulse-on-demand laser design concept using two different approaches. First, we present a fiber master oscillator power amplifier (MOPA) based quasi-continuous wave (CW) laser, working at high modulation bandwidths, for generation of nanosecond pulses. Second, we ...
Leto: 2021 Vir: Fakulteta za strojništvo (UL FS)
Pulse-on-demand operation for precise high-speed UV laser microstructuring
Jernej Jan Kočica, Jaka Mur, Julien Didierjean, Arnaud Guillossou, Julien Saby, Jaka Petelin, Girolamo Mincuzzi, Rok Petkovšek
Izvirni znanstveni članek
Oznake: vlakenski laserji;UV laserji;nanosekundni laserji;pulzi na zahtevo;obdelava materialov;fiber lasers;UV lasers;nanosecond lasers;pulse-on-demand;material processing;
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 sc ...
Leto: 2023 Vir: Fakulteta za strojništvo (UL FS)
Multi-frame multi-exposure shock wave imaging and pressure measurements
Jaka Mur, Fabian Reuter, Jernej Jan Kočica, Žiga Lokar, Jaka Petelin, Vid Agrež, Claus-Dieter Ohl, Rok Petkovšek
Izvirni znanstveni članek
Oznake: cavitation;laser breakdown;shock wave;laser illumination;fiber-optic hydrophone;
Shock wave visual detection was traditionally performed using streak cameras, limited to homogeneous shock wave emission, with the corresponding shock wave pressure measurements available at rather large distances or numerically estimated through equation of state for water. We demonstrate a multi-f ...
Leto: 2022 Vir: Fakulteta za strojništvo (UL FS)
Št. zadetkov: 5
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