Hi-tech industrial or biotechnological laser applications request for picosecond pulsed 2-μm laser generating sub-1-J pulses in >kHz repetition range. At HiLASE center the development of the laser system with target to generate 1-J picosecond pulses with 1-kHz repetition rate has started. In this paper, we present a concept of the laser system and demonstrate recent results from the first part of the laser – the holmium fiber oscillator. The holmium fiber front-end is pumped by a continuous wave <1-W thulium fiber laser generating at wavelength of 1950-nm. Mode-locking operation in the oscillator is reached by dispersion management in the laser cavity. In this self-starting configuration we reached 45-mW of average power with repetition rate of 22.5-MHz with pulse energy of 2-nJ.
Jitka Černohorská, Michael Písařík, Pavel Peterka, Jan Aubrecht, Reza Amani, Ondřej Novák, Martin Smrž, Michal Jelínek, Antonio Lucianetti, Akira Endo, and Tomáš Mocek, "High-energy subpicosecond 2-um fiber laser," Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 1068315 (Presented at SPIE Photonics Europe: April 24, 2018; Published: 17 May 2018); https://doi.org/10.1117/12.2307478.
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