title: Effect of B2O3 on luminescence of erbium doped tellurite glasses.
abstract: The B2O3 was introduced into the Er3+ doped TeO2-ZnO-Na2O glass to increase the phonon energy of the host. The effect of B2O3 on the non-radiative rate of the 4I11/2-->4I13/2 transition of Er3+, the lifetime of the 4I11/2 and 4I13/2 levels, the green and red upconversion emissions intensity, and the 4I13/2-->4I15/2 emission intensity was discussed. The results show that the phonon energy of boro-tellurite glass is close to that of germanate glass and is quite smaller than that of borate glass. The lifetime of 4I11/2 level and the upconversion emissions decrease with increasing B2O3 concentration. The higher OH group concentration presented in the boro-tellurite glass may shorten the lifetime of 4I13/2 level and also reduce the quantum efficiency of 4I13/2-->4I15/2 emission. The future dehydrating procedures are suggested to enhance the efficiency of amplification at 1.5 microm band.
authors.affiliation: Faculty of Information Science and Engineering, Ningbo University, Zhejiang 315211, China. shenxiang_nbu@hotmail.com
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Nie
authors.forename: Tiefeng
authors.initials: T
authors.lastname: Xu
authors.forename: Shixun
authors.initials: S
authors.lastname: Dai
authors.forename: Xunsi
authors.initials: X
authors.lastname: Wang
mesh_terms: D001896:Boron Compounds / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D008163:Luminescent Measurements; D017550:Spectroscopy, Fourier Transform Infrared; D013691:Tellurium / Q000737:chemistry*
chemical_list: D001896:Boron Compounds; C042168:boron oxide; D004871:Erbium; C026660:tellurous acid; D013691:Tellurium