Investigation of infrared emission and lifetime in Tm-doped 75TeO₂:20ZnO:5Na₂O (mol % ) glasses: Effect of Ho and Yb co-doping

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• 作者：Daniel Milanese ; Monica Vota ; Qiuping Chen ; Jianjun Xing ; Guihua Liao ; Hrvoje Gebavi ; Monica Ferraris ; Nicola Coluccelli ; Stefano Taccheo
• 关键词：Infrared glasses ; Heavy metal oxides ; Optical spectroscopy ; Absorption ; Lasers ; Luminescence ; Optical spectroscopy ; Time resolved measurements ; Tellurites
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2008
• 出版时间：15 April 2008
• 年：2008
• 卷：354
• 期：18
• 页码：1955-1961
• 全文大小：332 K

文摘

In this paper we describe fabrication and characterization of rare-earth-doped active tellurite glasses to be used as active laser media for fiber lasers emitting in the 2 μm region. The base composition is (mol % ): 75TeO₂–20ZnO–5Na₂O with different concentrations of Tm³⁺, Yb³⁺ and Ho³⁺ as dopants or co-dopants. Optical properties of doped glasses were studied and pumping at 800 nm and at 980 nm were tested in order to compare the efficiency of two pumping mechanisms. Optical characterization carried out on glasses containing only Tm³⁺ ions indicated the optimum concentration of Tm₂O₃ in terms of emission efficiency as 1 wt % . The addition of 5 wt % of Yb₂O₃ to Tm³⁺-doped glasses led to the best results in terms of intensity of fluorescence emission and of lifetime values. Yb and Ho co-doped Tm-tellurite glass was measured in emission.