Visible Laser Action of Dy3+ Ions in Monoclinic KY(WO 4) 2 and KGd(WO 4) 2 Crystals under Xe-Flashlamp Pumping

Pulsed laser action in the novel visible laser channels 4F9/2→6H13/2 (at ≈0.57 µm) and 4F9/2→6H11/2 (at ≈0.66 µm) of Dy3+ ions in monoclinic KY(WO4)2 and KGd(WO4)2 single crystals at nitrogen cryogenic temperature under Xe-flashlamp pumping is excited for the first time. All observed lasing emissions are identified. Some spectroscopic characteristics of the investigated crystals are also presented.