High-pulse-energy actively Q-switched Tm-doped photonic crystal fiber laser operating at 2050 nm with narrow linewidth

Julian Schneider; Hugo Lassiette; Dominik Lorenz; Patrick Forster; Jan Lautenschläger; Dieter Panitzek; Clément Romano; Marc Eichhorn; Christelle Kieleck

doi:10.1117/12.3002397

12 March 2024 High-pulse-energy actively Q-switched Tm³⁺-doped photonic crystal fiber laser operating at 2050 nm with narrow linewidth

Julian Schneider, Hugo Lassiette, Dominik Lorenz, Patrick Forster, Jan Lautenschläger, Dieter Panitzek, Clément Romano, Marc Eichhorn, Christelle Kieleck

Author Affiliations +

Proceedings Volume 12865, Fiber Lasers XXI: Technology and Systems; 1286517 (2024) https://doi.org/10.1117/12.3002397
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

An actively Q-switched diode-pumped Tm³⁺-doped fiber laser (TDFL) operating at 2050 nm is reported based on a flexible Photonic Crystal Fiber (PCF) with a core diamter of 50 μm. Using a fiber length of 3 m, the TDFL delivers gaussian shaped pulses with a maximum pulse energy of 1.5 mJ, corresponding to a peak power of 16 kW and a pulse width of 88 ns. The measured output spectrum shows a single peak at 2050 nm with a 3-dB-linewidth of 100 pm and 10-dB-linewidth of 270 pm. For a longer fiber length of 7 m, the effective gain is redshifted by reabsorbtion, increasing the achievable pulse energy up to 1.9 mJ. The average output power of the pulsed TDFL can be scaled to more than 100 W with a slope efficiency of 46 %. In all configurations the TDFL delivers nearly diffraction limited beam quality (M² ⪅1.3).

Conference Presentation

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

Citation Download Citation

Julian Schneider, Hugo Lassiette, Dominik Lorenz, Patrick Forster, Jan Lautenschläger, Dieter Panitzek, Clément Romano, Marc Eichhorn, and Christelle Kieleck "High-pulse-energy actively Q-switched Tm³⁺-doped photonic crystal fiber laser operating at 2050 nm with narrow linewidth", Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems, 1286517 (12 March 2024); https://doi.org/10.1117/12.3002397

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