Effects of WO3 Contents on the Thermal and Spectroscopic Properties of Tm3+-doped TeO2-WO3-La2O3Glasses

doi:10.3724/SP.J.1077.2010.00429

Abstract

Abstract: Tungstenlanthanumtellurite (TWL) glasses with the molar composition (90-x)TeO₂-xWO₃-9La₂O₃-1Tm₂O₃(x=10, 20, 30(mol%)) were prepared. Effects of WO3 contents on the thermal stability and spectroscopic properties of Tm³⁺ doped TWL glasses were studied. It is found that the thermal stability of TWL glasses is improved with the increasing WO₃ contents. For the glass with 30mol% WO₃, the glass transition temperature(T_g) is 457℃, while onset crystallization temperature(T_x) is not observed in DTA curve, and the thermal expansion coefficient of the glass decreases to 1.224×10^-5/℃ (30-300℃). The maximum phonon energy of the glasses shows the dependence on the host composition. The spectroscopic intensity parameters (Ω_t t=2,4,6), radiative transition rates, radiative lifetimes, and branching ratios are calculated by Judd-Ofelt theory. The emission crosssection of Tm³⁺: ³F₄→³H₆ transition is calculated by McCumber theory. The maximum emission crosssection of Tm³⁺ in 60TeO₂-30WO₃-9La₂O₃-1Tm₂O₃ glass is 9.6×10^-21cm². Evaluated from the thermal and spectroscopic properties, 60TeO₂-30WO₃-10La₂O₃glass is a promising host material for ~2.0μm laser.

Key words: tungsten-lanthanum-tellurite glass, Tm³⁺, thermal stability, spectroscopic properties

CLC Number:

TQ171

LI Ke-Feng,WANG Guo-Nian,HU Li-Li,ZHANG Jun-Jie,HU Jun-Jiang. Effects of WO₃ Contents on the Thermal and Spectroscopic Properties of Tm³⁺-doped TeO₂-WO₃-La₂O₃Glasses
[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2010.00429.

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Effects of WO₃ Contents on the Thermal and Spectroscopic Properties of Tm³⁺-doped TeO₂-WO₃-La₂O₃Glasses

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