title: Mid-infrared emission and Raman spectra analysis of Er(3+)-doped oxyfluorotellurite glasses.
abstract: This paper reports on the spectroscopic and structural properties in Er(3+)-doped oxyfluorotellurite glasses. The compositional variation accounts for the evolutions of Raman spectra, Judd-Ofelt parameters, radiative properties, and fluorescent emission. It is found that, when maximum phonon energy changes slightly, phonon density plays a crucial role in quenching the 2.7 μm emission generated by the Er(3+):(4)I11/2→(4)I13/2 transition. The comparative low phonon density contributes strong 2.7 μm emission intensity. The high branching ratio (18.63%) and large emission cross section (0.95×10(-20)  cm(2)) demonstrate that oxyfluorotellurite glass contained with 50 mol.% TeO2 has potential application in the mid-infrared region laser.
authors.forename: Fangze
authors.initials: F
authors.lastname: Chen
authors.forename: Shaoqiong
authors.initials: S
authors.lastname: Xu
authors.forename: Tao
authors.initials: T
authors.lastname: Wei
authors.forename: Fengchao
authors.initials: F
authors.lastname: Wang
authors.forename: Muzhi
authors.initials: M
authors.lastname: Cai
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.forename: Shiqing
authors.initials: S
authors.lastname: Xu