title: Optical characterization of Tm(3+) doped Bi2O3-GeO2-Ga2O3 glasses in absence and presence of BaF2.
abstract: In this paper, Two new Bi2O3-GeO2-Ga2O3 glasses (one presence of BaF2) doped with 1mol% Tm2O3 were prepared by melt-quenching technique. Differential thermal analysis (DTA), the absorption, Raman, IR spectra and fluorescence spectra were measured. The Judd-Ofelt intensity parameters, emission cross section, absorption cross section, and gain coefficient of Tm(3+) ions were comparatively investigated. After the BaF2 introduced, the glass showed a better thermal stability, lower phonon energy and weaker OH(-) absorption coefficient, meanwhile, a larger ~1.8 μm emission cross section σem (7.56 × 10(-21) cm(2)) and a longer fluorescence lifetime τmea (2.25 ms) corresponding to the Tm(3+): (4)F3 → (3)H6 transition were obtained, which is due to the addition of fluoride in glass could reduce the quenching rate of hydroxyls and raise the cross-relaxation ((3)H6 + (3)H4 → (3)F4 + (3)F4) rate. Our results suggest that the Tm(3+) doped Bi2O3-GeO2-Ga2O3 glass with BaF2 might be potential to the application in efficient ~1.8 μm lasers system.
authors: Changchun University of Science and Technology, 7089 Weixing Road, Changchun, Jilin, 130022, P. R. China.
authors: Kexuan
authors: K
authors: Han
authors: Changchun University of Science and Technology, 7089 Weixing Road, Changchun, Jilin, 130022, P. R. China.
authors: Peng
authors: P
authors: Zhang
authors: Jilin University, Changchun, Jilin, 130012, P. R. China.
authors: Shunbin
authors: S
authors: Wang
authors: Changchun University of Science and Technology, 7089 Weixing Road, Changchun, Jilin, 130022, P. R. China.
authors: Yanyan
authors: Y
authors: Guo
authors: Changchun University of Science and Technology, 7089 Weixing Road, Changchun, Jilin, 130022, P. R. China.
authors: Dechun
authors: D
authors: Zhou
authors: Changchun University of Science and Technology, 7089 Weixing Road, Changchun, Jilin, 130022, P. R. China.
authors: Fengxia
authors: F
authors: Yu