title: Intense upconversion luminescence and effect of local environment for Tm3+/Yb3+ co-doped novel TeO2-BiCl3 glass system.
abstract: We present the results of a study that uses theoretical and experimental methods to investigate the characteristics of the upconversion luminescence of Tm3+/Yb3+ codoped TeO2-BiCl3 glass system as a function of the BiCl3 fraction. These glasses are potentially important in the design of upconversion fiber lasers. Effect of local environment around Tm3+ on upconversion fluorescence intensity was analyzed by theoretical calculations. The structure and spectroscopic properties were investigated in the experiments by measuring the Raman spectra, IR transmission spectra, and absorption and fluorescence intensities at room temperature. The results indicate that blue luminescence quantum efficiency increases with increasing BiCl3 content from 10 to 60 mol%, which were interpreted by the increase of asymmetry of glass structure, decrease of phonon energy and removing of OH- groups.
authors.affiliation: Department of Laserglass, Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China. wangwgn2942@mail.siom.ac.cn
authors.forename: Guonian
authors.initials: G
authors.lastname: Wang
authors.forename: Shixun
authors.initials: S
authors.lastname: Dai
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Wen
authors.forename: Jianhu
authors.initials: J
authors.lastname: Yang
authors.forename: Zhonghong
authors.initials: Z
authors.lastname: Jiang
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D049449:Luminescence; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature; D013932:Thulium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D013932:Thulium; D015018:Ytterbium; D013691:Tellurium; D001729:Bismuth