Monolithic femtosecond holmium fiber MOPA system at 2050 nm

Lea Schlotmann; Moritz Hinkelmann; Frithjof Haxsen; Jörg Neumann; Dietmar Kracht

doi:10.1117/12.3017127

20 June 2024 Monolithic femtosecond holmium fiber MOPA system at 2050 nm

Lea Schlotmann, Moritz Hinkelmann, Frithjof Haxsen, Jörg Neumann, Dietmar Kracht

Proceedings Volume 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV; 130030A (2024) https://doi.org/10.1117/12.3017127
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

We report on a Holmium-doped femtosecond polarization-maintaining (PM) all-fiber amplifier system at a central wavelength of 2050nm that is designed as a seed source for a Holmium:YLF-based amplifier. The amplifier system employs a three-stage amplification process for power scaling while reducing the repetition rate. The first two Holmium-fiber amplifiers are core-pumped at a wavelength of 1940 nm. The final amplification stage is based on a double-clad Thulium-fiber, whose gain spectrum allows for the simultaneous amplification of the remaining pump light from the second amplifier stage and the Holmium-signal. Temporal pulse-stretching to a pulse duration of 190 ps using a chirped fiber Bragg grating (CFBG) prevents nonlinearities. We obtained pulse energies up to 300 nJ at 50 kHz.

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lea Schlotmann, Moritz Hinkelmann, Frithjof Haxsen, Jörg Neumann, and Dietmar Kracht "Monolithic femtosecond holmium fiber MOPA system at 2050 nm", Proc. SPIE 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV, 130030A (20 June 2024); https://doi.org/10.1117/12.3017127

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KEYWORDS

Holmium

Femtosecond phenomena

Fiber lasers

Thulium

Ultrafast phenomena

Fiber amplifiers

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