Comparative investigation on the spectroscopic properties of Pr3+-doped boro-phosphate, boro-germo-silicate and tellurite glasses

We report on the spectroscopic properties of Pr3+-doped boro-phosphate, boro-germo-silicate and tellurite glasses. The stimulated absorption and emission cross sections were estimated. Only one emission at 596 nm and 605 nm is observed in Pr3+-doped boro-phosphate and boro-germo-silicate glasses, respectively, while three emissions at 605 nm, 612 nm and 645 nm are observed in Pr3+-doped tellurite glass when excited at 467 nm. The fluorescence lifetime at 600 nm in Pr3+-doped boro-phosphate, boro-germo-silicate and tellurite glasses is 137 μs, 73 μs and 51 μs, respectively. The emissions from Pr3+-doped boro-phosphate, boro-germo-silicate and tellurite glasses show different decay behaviors and can be well explained by multiphonon relaxation theory.

The time-resolved spectra of Pr3+-doped phosphate (a), silicate (b), and tellurite (c) glasses.Figure optionsDownload as PowerPoint slideHighlights
► Explains the different visible emission behaviors of Pr3+ in oxide glasses.
► Clarify the multiphonon relaxation processes of Pr3+ in oxide glasses.
► Design the Pr3+-doped oxide glasses as materials for visible fiber laser.