Red Sm:KGd(WO$_4$)$_2$ laser at 649 nm
Résumé
We report on the first laser operation of a Sm$^{3+}$ -doped monoclinic KGd(WO$_4$)$_2$ double tungstate crystal in the red spectral range. Pumped by a frequency-doubled optically pumped semiconductor laser (2 ω -OPSL) at 479.1 nm, the 0.8 at. % Sm:KGd(WO$_4$)$_2$ laser generated an output power up to 17.6 mW at 649.1 nm (the $^4$G$_{5/2}$ → $^6$H$_{9/2}$ transition) with a slope efficiency of 16.9%, a laser threshold down to 29 mW and a linear polarization. The laser exhibited a self-pulsing behavior, delivering µs-long pulses with a repetition rate of a few kHz. The polarized spectroscopic properties of Sm$^{3+}$ ions were determined as well.
Domaines
Physique [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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