Abstract
We report on a polarization-resolved spectroscopic study of Sm3+-doped monoclinic KGd(WO4)2 crystals. The transition probabilities for Sm3+ ions were calculated using a modified Judd-Ofelt theory. For the 4G5/2 → 6H9/2 transition in the red spectral range, the stimulated-emission cross-section is 5.59×10-21 cm² at 649.0 nm (for light polarization E || Np) and the luminescence lifetime of the 4G5/2 state is 719 μs (0.4 at.% Sm3+-doping). Sm:KGd(WO4)2 is promising for orange and red lasers.
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