Spectral properties of Pr:CNGG crystals grown by micro-pulling-down method*

Abstract

Pr3+-doped calcium niobium gallium garnet (Pr:CNGG) single crystals with different Pr3+concentrations are successfully grown by the micro-pulling-down (μ-PD) method. The crystal structure, room-temperature absorption spectra, and fluorescence spectra of Pr:CNGG crystals are measured and discussed. The fluorescence results indicate their large dependence on the doping concentration. The fluorescence lifetime of the D 2 1 energy level is also determined. The results indicate that Pr:CNGG crystal could be a potential solid-state laser gain medium.

Crystal growth, structure and optical properties of Pr3+-doped yttria-stabilized zirconia single crystals*

“…The strong splitting (∼ 800 cm −1 ) observed in this transition indicates a relatively strong crystal field around the Pr 3+ ion. [32] However, the most intense absorption is in the blue region (the strongest peak is at 450 nm), and this result is consistent with the published results for Pr 3+ , such as Pr: CNGG crystal [39] and Pr 3+ -doped Na 3 La 9 O 3 (BO 3 ) 8 crystal. [11] As expected, the PLE wavelengths in the range of 400-590 nm of Pr-doped YSZ single crystals are similar to those in the absorption spectrum (Fig.…”