Jaka Petelin (Author), Luka Černe (Author), Jaka Mur (Author), Vid Agrež (Author), Jernej Jan Kočica (Author), Jörg Schille (Author), Udo Loeschner (Author), Rok Petkovšek (Author)

Abstract

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 present a hybrid chirped pulse amplification (CPA)-based laser, combining a chirped-pulse fiber amplifier and an additional solid-state amplifier, for generation of femtosecond pulses. The pulse-on-demand operation is achieved without an external optical modulator/shutter at high-average powers and flexible repetition rates up to 40 MHz, using two variants of the approach for near-constant gain in the amplifier chain. The idler and marker seed sources are combined in the amplifier stages and separated at the out using either wavelength-based separation or second harmonic generation (SHG)-generation-based separation. The nanosecond laser source is further applied to high throughput processing of thin film materials. The laser is combined with a resonant scanner, using the intrinsic pulse-on-demand operation to compensate the scanner%s sinusoidal movement. We applied the setup to processing of indium tin oxide (ITO) and metallic films on flexible substrates.

Keywords

arbitrary repetition rate;fiber lasers;gain control;high speed processing;pulse-on-demand;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 621.7.015:621.375.826
COBISS: 74192131 Link will open in a new window
ISSN: 2192-8576
Views: 54
Downloads: 34
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Other data

Secondary language: Slovenian
Secondary keywords: poljubna ponavljalna frekvenca;vlakenski laserji;kontrola ojačenja;hitro procesiranje;blisk na zahtevo;
Type (COBISS): Article
Pages: str. 305-314
Volume: ǂVol. ǂ10
Issue: ǂiss. ǂ4/5
Chronology: 2021
DOI: 10.1515/aot-2021-0020
ID: 15882529