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- W2282314196 abstract "The electron paramagnetic resonance (EPR), optical absorption, and luminescence (emission and excitation) spectra as well as luminescence kinetics of the Er-doped glasses with Li2B4O7 composition were investigated and analysed. The high optical quality glasses with Li2B4O7:Er composition containing 0.5 and 1.0 mol.% Er2O3 were obtained from corresponding polycrystalline compound by standard glass synthesis. The EPR spectroscopy in the 4.2–300 K temperature range and optical spectroscopy at 300 K show that the Er impurity is incorporated into the network of Li2B4O7 glass as Er3+ (4f11, 4I15/2) ions, exclusively. The local structure of the Er3+ luminescence centres in Li sites of the glass network is proposed. Based on the standard Judd–Ofelt theory the oscillator strength (Pcal) and experimental oscillator strength (Pexp) for observed absorption transitions as well as phenomenological intensity parameters (Ω2, Ω4, Ω6) for Er3+ centres in the Li2B4O7:Er glass containing 1.0 mol.% Er2O3 were calculated. Spectroscopic parameters of relevance for laser applications, including emission probabilities of transitions (Wr), branching ratios (β), and radiative lifetime (τrad) have been calculated for main observed emission transitions of the Er3+ centres in Li2B4O7:Er glasses. Experimental and calculated lifetimes were compared and quantum efficiency (η) for green (4S3/2 → 4I15/2 transition) and infrared (4I13/2 → 4I15/2 transition) emission bands has been estimated." @default.
- W2282314196 created "2016-06-24" @default.
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- W2282314196 date "2016-04-01" @default.
- W2282314196 modified "2023-10-06" @default.
- W2282314196 title "Spectroscopy of the Er-doped lithium tetraborate glasses" @default.
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- W2282314196 doi "https://doi.org/10.1016/j.optmat.2016.02.025" @default.
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