Optical properties and upconversion in Er~(3+) and Ho~(3+) doped in lithium tellurite glass

摘要

Ho~(3+) and Er~(3+) doped lithium tellurite glasses have been formed with different concentrations of rare earth and their optical properties are derived on the basis of their absorption and fluorescence spectra. Intense upconversion emission in ultraviolet/violet, green and red regions have been observed when these glasses are pumped with NIR radiation. A preliminary study indicates that they can be used as temperature