Er:KY$_3$F$_{10}$ laser at 2.80 µm
Résumé
We report on the mid-infrared laser operation of a cubic 15 at.% Er$^{3+}$:KY$_3$F$_{10}$ crystal. In the quasi-continuous-wave regime, the peak power reaches 255 mW at 2.80 µm (the $^4$I$_{11/2}$ → $^4$I$_{13/2}$ transition) with a slope efficiency of 10.9% and a laser threshold of 58 mW. Two pumping schemes (to the $^4$I$_{11/2}$ and $^4$I$_{9/2}$ states) are compared. The emission properties of the Er$^{3+}$ ions in KY$_3$F$_{10}$ are studied, indicating high stimulated-emission cross-section of 0.57 × 10$^{−20}$ cm$^2$ at 2.80 µm, a large gain bandwidth of 40 nm, and a long $^4$I$_{11/2}$ state lifetime of 4.64 ms.
Domaines
Optique [physics.optics]Origine | Fichiers produits par l'(les) auteur(s) |
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