Abstract
The eye-safe Thulium (Tm3+) laser emission at ~2 µm, based on the 3F4 → 3H6 transition, is of interest for remote sensing and medicine. Monoclinic double tungstates are known as excellent hosts for Tm3+ ions allowing for efficient lasers at ~1.94 µm [1]. However, they suffer from low thermal conductivity (~3 W/mK) limiting the power scaling. Recently, another monoclinic tungstate crystal with a wolframite structure, MgWO4 which exhibits much better thermal properties has been proposed for RE3+ doping [2]. In the present work, we report on efficient and compact Tm:MgWO4 lasers at >2 µm.
© 2017 IEEE
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