Influence of BaF<sub>2</sub> and activator concentration on broadband near-infrared luminescence of Pr<sup>3+</sup> ions in gallo-germanate glasses

Optics Express
Joanna PisarskaWojciech A Pisarski

Abstract

Thermal stability and broadband NIR luminescence of Pr<sup>3+</sup> doped gallo-germanate glasses with BaF<sub>2</sub> have been studied. The thermal factors are larger for glass samples with low BaF<sub>2</sub> content exhibiting good thermal stability against devitrification. Luminescence due to <sup>1</sup>D<sub>2</sub> → <sup>1</sup>G<sub>4</sub> transition of Pr<sup>3+</sup> was measured under 450 nm excitation. The <sup>1</sup>D<sub>2</sub> measured lifetimes depend critically on activator concentration, but remain nearly unchanged with BaF<sub>2</sub> content. The emission linewidth, the emission cross-section, the figure of merit (FOM) and the σ<sub>em</sub> x FWHM product are relatively large, suggesting that Pr<sup>3+</sup>-doped gallo-germanate glasses with presence of BaF<sub>2</sub> are promising as gain media for broadband near-infrared amplifiers.

References

Jun 12, 2008·The Journal of Physical Chemistry. a·Yanlin HuangHyo Jin Seo
Nov 15, 1991·Optics Letters·Y OhishiG H Sigel
Aug 3, 2011·Optics Letters·Bo Zhou, Edwin Yue-Bun Pun
Mar 16, 2012·Optics Express·Bo ZhouEdwin Yue-Bun Pun
Aug 5, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Wojciech A PisarskiJan Dorosz

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