Growth and properties of a thulium, holmium-codoped LuLiF4 single crystal

LuLiF4 single crystals codoped with thulium (Tm) and holmium (Ho) were successfully grown by the Czochralski method. The excellent laser performance, in terms of highest slope efficiency, and highest optical-to-optical efficiency and lower laser threshold, was studied in comparison with 5% Tm, 0.5% Ho-codoped YLiF4, and Lu3Al5O12 under the same conditions.