Abstract

Thulium and thulium-holmium-doped crystals are currently used in all-solid-state 2-µm laser sources which are very attractive in a number of application, including various remote sensing and medical technology.. We have reported recently the spectroscopy and laser operation (over ~1850 to ~1950nm) of monoclinic crystals KY(WO₄)₂:15%Tm under CW 0.5W@800nm pump of a Ti:Sa laser. In this work we present the results on population dynamics and laser operation for a set of potassium-yttrium (or ytterbium) tungsten oxides doped with Tm concentration from 1% to 15%. All samples under study were oriented with the normal to flat polished surface along the b-axis with accuracy ±3°.

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