Red Sm:KGd(WO$_4$)$_2$ laser at 649 nm - CEA - Université Paris-Saclay
Journal Articles Optics Letters Year : 2023

Red Sm:KGd(WO$_4$)$_2$ laser at 649 nm

Abstract

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.
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Dates and versions

hal-04776006 , version 1 (10-11-2024)

Identifiers

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Amandine Baillard, Pavel Loiko, Daniel Rytz, Sebastian Schwung, Michaël Fromager, et al.. Red Sm:KGd(WO$_4$)$_2$ laser at 649 nm. Optics Letters, 2023, 48 (18), pp.4721. ⟨10.1364/OL.498100⟩. ⟨hal-04776006⟩
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