High power fiber MOPA based QCW laser delivering pulses with arbitrary duration on demand at high modulation bandwidthPetkovšek, Rok (Avtor) Novak, Vid (Avtor) Agrež, Vid (Avtor) fiber laserspulsed lasersytterbium fibersWe report on a concept of a fiber MOPA based quasi-CW laser working at high modulation bandwidths up to 40 MHz capable of producing arbitrary pulse durations at arbitrary repetition rates. An output power of over 100 W was achieved and an on-off contrast of 25 dB. The laser features a dual-channel (dual-wavelength) seed source, a double stage YDF amplifier and a volume-Bragg-grating-based signal de-multiplexer. Minimization of transients was conducted through experiment and model analysis.20152018-12-06 08:14:16Članek v reviji105561UDK: 535(045)ISSN pri članku: 1094-4087DOI: 10.1364/OE.23.033150COBISS_ID: 14385947OceCobissID: 8636438sl