title: Upconversion properties of Er3+, Yb3+ and Tm3+ codoped fluorophosphate glasses.
abstract: Er3+, Yb3+ and Tm3+ codoped fluorophosphate glasses emitting blue, green and red upconversion luminescence at 970 nm laser diode excitation were studied. It was shown that Tm3+ behaves as the sensitizer to Er3+ for the green upconversion luminescence through the energy transfer process: Tm3+:3H4+Er3+:4I 15/2-->Er3+:4I 9/2+Tm3+:3H6, and for the red upconversion luminescence through the energy transfer process: Tm3+:3F4+Er3+:4I 11/2-->Tm3+:3H6+Er3+:4F 9/2. Moreover, Er3+ acts as quenching center for the blue upconversion luminescence of Tm3+. The sensitization of Tm3+ to Er3+ depends on the concentration of Yb3+. The intensity of blue, green and red emissions can be changed by adjusting the concentrations of the three kinds of rare earth ions. This research may provide useful information for the development of high color and spatial resolution devices and white light simulation.
authors.affiliation: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, PR China. liaomeisong2005@yahoo.com.cn
authors.forename: Meisong
authors.initials: M
authors.lastname: Liao
authors.forename: Lili
authors.initials: L
authors.lastname: Hu
authors.forename: Yongzheng
authors.initials: Y
authors.lastname: Fang
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
authors.forename: Hongtao
authors.initials: H
authors.lastname: Sun
authors.forename: Shiqing
authors.initials: S
authors.lastname: Xu
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhang
mesh_terms: D004871:Erbium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007834:Lasers; D049449:Luminescence; D010710:Phosphates / Q000737:chemistry*; D013057:Spectrum Analysis; D013932:Thulium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D010710:Phosphates; C012980:fluorophosphate; D004871:Erbium; D013932:Thulium; D015018:Ytterbium; D005459:Fluorides