Thulium is lanthanoid with uses in lasers, x-ray sources, and high temperature superconductors. It is found in monazite. Holmium-chromium-thulium triple-doped YAG lases at 2097 nm and is used in meteorology, medicine and military applications. Thulium lasers have a wavelength that makes them good candidates for laser surgery.
(wiki) - Thulium on Wikipedia
Thulium News 2011-07-26 - (ut) - Natural orifice (NOTES) transurethral sutureless radical prostatectomy with thulium laser support: First patient report - Abstract
2011-06-15 - (kid) - Thulium: Scarcest of the rare earths
2011-05-26 - (san) - Nonablative fractional thulium 1927-nm laser proves effective for actinic cheilitis
2010-11-12 - (sn) - IR laser for more precise structuring of organic solar cell components
2010-11-09 - (nw) - European research alliance for the simplified production of organic solar cells