Thulium Oxide, also called Thulia, is the important dopant for silica-based fiber amplifiers, and also have specialized uses in ceramics, glass, phosphors, lasers. Because the wave length of Thulium-based lasers is very efficient for superficial ablation of tissue, with minimal coagulation depth in air or in water. This makes Thulium lasers attractive for laser-based surgery. It can also be used in portable X-ray devices that has been bombarded in a nuclear reactor as a radiation source.
Thulium oxide (Tm2O3) is a pale green compound. Thulium oxide can be produced by burning thulium metal in air, or by decomposition of their oxo acid salts such as thulium nitrate. It is hygroscopic and absorbs water and carbon dioxide from the atmosphere. Due to the nature of Oxide compounds, Thulium oxide is not conductive to electricity. However, Thulium oxide has several applications in fuel cells and oxygen generation systems.