Abstract
The heavy metal oxide glasses based on 40PbO–35Bi2O3–25Ga2O3 composition doped with different Er3+ ions content were synthesized in corundum crucible. The concentration dependences of band gap energy and Urbach energy in a series of glass samples were analyzed. The studied matrix showed wider IR transparency region comparing with other heavy metal oxide glasses containing PbO: up to 6.5 μm. The content of hydroxyl impurities NOH was evaluated based on infrared transmission spectra. The comparison of obtained NOH values with other oxide glasses indicate that studied composition has a moderate hydroxyl groups content. Luminescence properties of 4I13/2 → 4I15/2 transition were measured under 980 nm wavelength excitation. The correlation of radiative characteristics with NOH content was determined. The maximum relative luminescence intensity had the sample doped with 0.869 × 1020 ion/cm3 of Er3+. Comparative analysis of FWHM, peak value of emission cross-section, and radiative lifetime of 4I13/2 → 4I15/2 transition with other glass matrixes indicates the prospects of the investigated composition as advanced material for 1.5 μm optical amplifiers.
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