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|Type:||Artigo de periódico|
|Title:||Doped Tellurite Glasses: Extending Near-infrared Emission For Near 2.0 μm Amplifiers|
|Abstract:||Tm3+ singly doped and Tm3+/Ho3+-codoped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses were successfully prepared by the melt-quenching technique. Emission characteristics and energy transfer mechanisms were studied upon 785 nm laser diode excitation. A significant enhancement of emission intensity at 1.81 μm with increasing concentration of Tm3+ ions has been observed while increasing the emission intensity at 2.0 μm with increasing concentration of Ho3+ has been observed up to the equal concentration of Tm3+ (0.5 mol%) in TBZLN glasses. The stimulated emission cross section of Tm3+: 3F4 → 3H6 (5.20 × 10-21 cm2) and Ho3+: 5I7 → 5I8 (4.00 × 10-21 cm2) in 1.0 mol% Tm3+-doped and 0.5 mol% Tm3+/1.0 mol% Ho3+-codoped TBZLN glasses are higher compared to the reported and are found to be excellent candidates for solid-state lasers operating at ~1.8 and 2.0 μm, respectively. The extension of NIR emission of Tm3+ with Ho3+ ions provides the possibility of using these materials for broadband NIR amplifiers. © 2016 American Ceramic Society and Wiley Periodicals, Inc.|
|Editor:||Blackwell Publishing Inc.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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