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Femtosecond mode-locked lasers near 2 μm based on the Tm3+ ion have been drawing great attention since they are applied in various fields including physics, chemistry and biology [1]. Among the host materials for Tm3+, the monoclinic double tungstate crystals are one of the most promising for ultrashort pulse generation [2]. Recently, we successfully demonstrated efficient laser operation of a new...
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 Tm + ions allowing for efficient lasers at ∼1.94 μm [1]. However, they suffer irom low thermal conductivity (∼3 W/mK) limiting the power scaling. Recently, another monoclinic tungstate crystal with a wolframite...
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