Intense emission at 2.9 mu m from Yb3+/Ho3+ co-doped TeO2-Ga2O3-ZnO tellurite glasses

Yongqi Zhang (1) , Xiaoxi Li (1) , Weichao Wang (2) , Xianghua Zhang (3) , Yinsheng Xu (2, 1)

1 Wuhan University of Science and Technology
2 SCUT - South China University of Technology [Guangzhou]
3 ISCR - Institut des Sciences Chimiques de Rennes

Mid-infrared lasers have important applications in infrared countermeasures, sensing, environmental monitoring, biomedicine, and many military and civilian fields. In this work, an intense emission at 2.9 mu m from Yb3+/Ho3+ co-doped TeO2-Ga2O3-ZnO (TGZ) glass was reported. The 2 mu m, 1.2 mu m and visible emissions were also performed to understand the competitive luminescent mechanism. With the increase in Yb3+ concentration, all the emissions of Ho3+ increased, whereas the emission of Yb3+ decreased due to the phonon-assisted energy transfer from Yb3+ to Ho3+. The lifetimes of optimized 3 mol% Yb2O3 and 1 mol% Ho2O3 co-doped TGZ glass, which has the maximum emission intensity, are 548 mu s and 1.7 ms at 2.9 and 2 mu m, respectively. The Judd-Ofelt intensity parameters, absorption, and emission cross sections were calculated to evaluate the mid-infrared fluorescence properties of this new glass matrix material. The gain coefficients show that the 2 and 2.9 mu m laser gain can be realized by small pump energy, indicating that this glass is a promising medium for the mid-infrared optical fiber laser.

Mots clés: 2.9 mu m; energy transfer; Tellurium glass; Yb3+/Ho3+

Domaines: Chimie

Yongqi Zhang, Xiaoxi Li, Weichao Wang, Xianghua Zhang, Yinsheng Xu. Intense emission at 2.9 mu m from Yb3+/Ho3+ co-doped TeO2-Ga2O3-ZnO tellurite glasses. Journal of the American Ceramic Society, 2021, 104 (7), pp.2924-2931. ⟨10.1111/jace.17766⟩. ⟨hal-03217041⟩