Abstract
Ho3+, Pr3+: Sc2O3 crystal was successfully grown by the TGT method. The spectroscopic properties of the crystal were analyzed. The absorption cross section of Ho, Pr: Sc2O3 at 636 nm was 1.58×10–20 cm2. J-O theory was applied to analyze the fluorescence properties of the grown crystal at 2.9 μm. The intensity parameters Ωt (t=2,4,6), radiative transition rates, branching ratios and radiative lifetime were calculated. Ho, Pr: Sc2O3 exhibited strong emission at 2110 nm and 2864 nm with a stimulated emission cross section of 2.4 × 10–21 cm2 and 4.2 × 10–21 cm2, respectively. The fluorescence lifetime of the Ho3+ 5I6 and 5I7 levels were measured to be 1.64 ms and 5.74 ms. These results show that the Ho, Pr: Sc2O3 crystal would be a potential laser material at the 2.9 μm region.
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