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The Ce 3+ ion was introduced into Er 3+ doped TeO 2 –GeO 2 –Nb 2 O 5 –Li 2 O (TGNL) glass to improve the 1.5μm fluorescence characteristics. As increasing of Ce 3+ concentration, the lifetime of Er 3+ : 4 I 11/2 level is shortened form 360 to 225μs, while the Er 3+ : 4 I 13/2 level remains...
With the aim of outstanding optic characteristic in high infrared transmission and upconversion visible light emission, a new kind of bismuth-tellurite based glass and its application is described here. Firstly, the varying density and refractive index are drawn out with bismuth content increasing, then, some optic parameters are calculated with Judd-Ofelt and McCumber theory, lastly, the spectroscopic...
Er3+/Yb3+-codoped natrium-germanium-bismuth glasses for developing potential upconversion lasers have been fabricated and characterized. The absorption and upconversion fluorescence spectra were measured and investigated. The transition probabilities, excited state lifetimes, and the branching ratios have been predicted for Er3+ based on the Judd-Ofelt theory. Intense green and red emission bands...
Optical spectroscopic properties of Er3+ doped tellurite glass, 70TeO2-15GeO2-10Nb2O5- 5Li2O (TGNL) and 90TeO2-2ZnO-8PbO (TZP), were investigated for C-band optical amplification. The intensity parameters Ωt (t=2,4,6), the radiative rates, the branching ratios and the fluorescence lifetimes were calculated for Er based on the experimental absorption spectra and Judd-Ofelt theory. Among three Ωts,...
The erbium-doped 75TeO2(25-x)ZnO-xBi2O3 glasses have been explored from the density, refractive index, absorption spectra, bandwidth analysis for emission spectra, and lifetime measurements of the 4I13/2 level of Er3+ based on Judd-Ofelt and McCumber theories. The effects of bismuth oxide on these three optical parameters Omegat(t=2, 4, 6) are discussed in terms of the local basic nature of the glass...
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