1135 KB37 KB199920252019Agrež, VidBünting, UdoČerne, LukaPetelin, JakaPetkovšek, RokPodobnik, Boštjanštevilka:11/12letnik:65str. 680-689ISSN:0039-2480COBISSID_HOST:16944411URN:URN:NBN:SI:doc-FUSQ0OPYenZveza strojnih inženirjev in tehnikov Slovenije etc.Strojniški vestnikarbitrary repetition ratefibre lasersgain controlnadzor ojačenjapoljubna ponavljalna frekvencapulse on demandpulzi na zahtevovlakenski laserjiPulses on demand in fibre and hybrid lasers|This paper presents an investigation of pulse-on-demand operation in fibre and hybrid lasers. Two methods for efficient gain control that enable the generation of laser pulses at arbitrary times with controlled pulse parameters are presented. The method of direct modulation of the pump power in the high-power laser oscillator is shown to generate pulses with a duration in the nanosecond range, with repetition rates varying during operation from a single shot to over 1 MHz. An advanced method using a combination of marker and idler seeding a fibre amplifier chain is investigated. Such a system can easily achieve repetition rates of several tens of MHz. The lasers' performances were successfully tested in a real environment on an industrial platform for laser transfer printing. Similar concepts were used for a laser source with ultrashort laser pulses (femtosecond range) on demand by using a mode-locked seed as a source and a solid-state amplifier to achieve high pulse energy and peak powerTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo