Abstract

Trivalent thulium-doped LiGd(MoO4)2 single crystals have been grown by the Czochralski method. Room-temperature polarized absorption and fluorescence spectra of the crystals were analyzed. The fluorescence decay curves of the G14, H34, and F34 multiplets were measured, and the decay mechanisms of the G14 and H34 multiplets were discussed. Spectroscopic parameters related to the laser operation around 1.90μm via the F34H36 transition have been evaluated. Finally, end-pumped by a Ti:sapphire laser at 795 nm, the room-temperature quasi-continuous wave 1.9μm laser emission was demonstrated with a slope efficiency of 28%.

© 2010 Optical Society of America

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