title: Optical transitions of Ho(3+) in oxyfluoride glasses and upconversion luminescence of Ho(3+)/Yb(3+)-codoped oxyfluoride glasses.
abstract: Optical properties of Ho(3+)-doped SiO2-BaF2-ZnF2 glasses have been investigated on the basis of the Judd-Ofelt theory. Judd-Ofelt intensity parameters, radiative transition probabilities, fluorescence branching ratios and radiative lifetimes have been calculated for different glass compositions. Upconversion emissions were observed in Ho(3+)/Yb(3+)-codoped SiO2-BaF2-ZnF2 glasses under 980nm excitation. The effects of composition, concentration of the doping ions, and excitation pump power on the upconversion emissions were also systematically studied.
authors.affiliation: Institute of Materials Science and Engineering, Shijiazhuang University of Economics, Shijiazhuang 050031, PR China. Electronic address: fengli5435@hotmail.com.
authors.forename: Li
authors.initials: L
authors.lastname: Feng
authors.affiliation: College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016, PR China.
authors.forename: Yinsu
authors.initials: Y
authors.lastname: Wu
mesh_terms: D017609:Barium Compounds / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D005461:Fluorine / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006695:Holmium / Q000737:chemistry*; D049449:Luminescence; D010087:Oxides / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D015018:Ytterbium / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D017609:Barium Compounds; D010087:Oxides; D017967:Zinc Compounds; D005461:Fluorine; D012822:Silicon Dioxide; C014559:fluorine monoxide; C055150:barium fluoride; C038904:zinc fluoride; D015018:Ytterbium; D005459:Fluorides; D006695:Holmium
keywords: Judd–Ofelt; Optical transitions; Oxyfluoride glass; Upconversion