High power Q-switched Tm3+, Ho3+-codoped 2µm fiber laser and application for direct OPO pumping

Nicolas Dalloz; Thierry Robin; Benoît Cadier; Christelle Kieleck; Marc Eichhorn; Anne Hildenbrand-Dhollande

doi:10.1117/12.2507844

7 March 2019 High power Q-switched Tm³⁺, Ho³⁺-codoped 2μm fiber laser and application for direct OPO pumping

Nicolas Dalloz, Thierry Robin, Benoît Cadier, Christelle Kieleck, Marc Eichhorn, Anne Hildenbrand-Dhollande

Proceedings Volume 10897, Fiber Lasers XVI: Technology and Systems; 108970J (2019) https://doi.org/10.1117/12.2507844
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

A bidirectional 793 nm diode-pumped actively Q-switched Tm³⁺, Ho³⁺-codoped silica polarization maintaining (PM) double-clad (DC) fiber laser is reported. An average output power of 55 W with 100 ns pulse width, 200 kHz repetition rate and 2.09 μm wavelength is obtained with this fiber laser. To the best of our knowledge, this is the highest ever demonstrated average output power emitted from a Q-switched single oscillator 2 μm fiber laser. Thanks to end-caps fusion-spliced on both fiber tips, this fiber laser source is presenting good beam quality factors (M² < 1.7) and no thermal-induced damaging is observed at 55 W average output power. Further power scaling of the laser is only pumppower- limited in the range of the total available pump power in this setup (180 W). Direct OPO ZnGeP₂ (ZGP) pumping with this fiber laser has been performed for optical nonlinear conversion in the mid-IR regime. More than 8 W of average output power has been generated in the 3-5 μm band.

Conference Presentation

Citation Download Citation

Nicolas Dalloz, Thierry Robin, Benoît Cadier, Christelle Kieleck, Marc Eichhorn, and Anne Hildenbrand-Dhollande "High power Q-switched Tm³⁺, Ho³⁺-codoped 2μm fiber laser and application for direct OPO pumping", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 108970J (7 March 2019); https://doi.org/10.1117/12.2507844

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