Spectroscopic Properties of Yb3+/Tb3+ Doped Germanate Glasses
M. Kochanowicz, D. Dorosz, J. Żmojda and J. Dorosz
Department of Optoelectronics and Lighting Technology, Białystok University of Technology, Wiejska 45, 15-351 Białystok, Poland
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In the article the cooperative energy transfer in GeO2-GaO-BaO glass system doped with Yb3+/Tb3+ under 980 nm laser diode excitation was investigated. The influence of Tb3+ concentration on the luminescent properties was determined. Measured strong luminescence at 489, 543, 586, 621 corresponds to 5D47FJ (J = 6, 4, 3) transitions and luminescence at 381, 415, 435 nm results from 5D3, 5G67FJ (J = 6, 5, 4) transitions. Mechanism and energy diagram involved in observed emission were discussed. The highest upconversion: emission intensity was obtained in the germanate glass doped with 0.7 Yb2O3/0.7 Tb2O3.
DOI: 10.12693/APhysPolA.122.837
PACS numbers: 42.81.-i, 42.79.Ag, 42.70.-a