3.9 μm emission in Nd3+ sensitized Ho3+ doped fluoroaluminate glasses

[摘要] Ho3+ and Nd3+/Ho3+ doped fluoroaluminate glass samples were fabricated by the melt-quenching method and showed high transmittance and a wide transparency window. Under 808 nm pumping, emission at 3.9 mu m, corresponding to the Ho: I-5(5) -> I-5(6) transition, was observed. The presence of Nd3+ strongly enhances the Ho3+ emission. The emission and absorption cross-sections were calculated using the Judd-Ofelt, Fuchtbauer-Ladenburg and McCumber theories and the energy transfer mechanism between Nd3+ and Ho3+ was analyzed. The most efficient 3.9 mu m emission was obtained when the concentration ratio of Nd3+: Ho3+ is 1: 2. (C) 2021 Published by Elsevier B.V.

[发布日期] 2021-12-31

[关键词] Fluoroaluminate glass;Mid-infrared fluorescence;Nd-3(+)/Ho3+-codoped;3.9 mu m