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- W1980914085 abstract "Different glass matrices doped with Nd 3+ have been prepared by the conventional melt quenching method with the molar compositions of (89− x )TeO 2 –10TiO 2 –1Nd 2 O 3 – x WO 3 ( x =0, 10 and 20 mol%). The XRD, FTIR, absorption spectra, photoluminescence (PL) spectra and luminescence decay curves of glass samples were measured at room temperature and investigated, respectively. The XRD pattern confirms the amorphous nature of the prepared glasses. The free OH − content in the 1.0 mol% Nd 2 O 3 -doped glass samples has been estimated from their measured Infrared transmittance spectra. Judd–Ofelt (J–O) intensity parameters were derived from the absorption spectrum and used in turn to estimate radiative properties such as radiative transition probabilities ( A T ), radiative lifetimes ( τ r ) and branching ratios ( β JJ ′ ) for 4 F 3/2 → 4 I 9/2 , 11/2, 13/2 transitions. From the emission spectra, peak wavelength, effective bandwidth (Δ λ eff ) and stimulated emission cross-section ( σ emis ) were calculated for the 4 F 3/2 → 4 I 11/2 transition. The values of the stimulated emission cross-section obtained in the present Nd 3+ -doped tellurite glasses are on the higher side than the values of the reported as well as commercial. The luminescence decay curves for the 4 F 3/2 → 4 I 11/2 transition have been measured to evaluate the quantum efficiency ( η ). The results show a significant increase of the quantum efficiency ( η ) with the increases of WO 3 concentration. Notably, it is found that the quantum efficiency in the TTNW 20 glass is much longer than that in most other glasses which indicates that this glass system could be considered as a good candidate for near-infrared lasers at 1.06 μm. • TeO 2 –TiO 2 –Nd 2 O 3 –WO 3 glass system was prepared using the melt quenching method. • The local environment of Nd 3+ ions in tellurite glasses is sensitive to WO 3 content. • Radiative properties have been determined using Judd–Ofelt theory for different WO 3 contents. • The quantum efficiency of the 4 F 3/2 → 4 I 11/2 transition increases with WO 3 content in the glass. • Broadband and high absorption and emission cross-sections for the 4 F 3/2 → 4 I 15/2 transition are shown." @default.
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- W1980914085 date "2014-11-01" @default.
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- W1980914085 title "Radiative parameters of Nd3+-doped titanium and tungsten modified tellurite glasses for 1.06µm laser materials" @default.
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- W1980914085 doi "https://doi.org/10.1016/j.jqsrt.2014.05.029" @default.
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