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Influence of BaF2 and activator concentration on broadband near-infrared luminescence of Pr ions in gallo-germanate glasses

Optics Express, ISSN: 1094-4087, Vol: 24, Issue: 3, Page: 2427-2435
2016
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Article Description

Thermal stability and broadband NIR luminescence of Pr doped gallo-germanate glasses with BaF have been studied. The thermal factors are larger for glass samples with low BaF content exhibiting good thermal stability against devitrification. Luminescence due to D → G transition of Pr was measured under 450 nm excitation. The D measured lifetimes depend critically on activator concentration, but remain nearly unchanged with BaF content. The emission linewidth, the emission cross-section, the figure of merit (FOM) and the σ x FWHM product are relatively large, suggesting that Pr-doped gallo-germanate glasses with presence of BaF are promising as gain media for broadband near-infrared amplifiers.

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