Abstract
The synthesis and optical characterizations of CaLaGa3O7 crystals with different Er dopant concentration are reported. The optical parameters related to absorption and emission cross-sections were evaluated and compared. It was found that the NIR fluorescence weakens, at the same time Mid-IR fluorescence intensity strengthens with the increment of Er3+ ion dopant concentration in Er: CaLaGa3O7 crystals. Furthermore, the energy transfer mechanism in Er: CaLaGa3O7 crystal was studied in this work. Besides, the radiative transfer microscopic parameters of 4I11/2 and 4I13/2 levels were theoretically analyzed. Hence, these results indicate that 30 at% Er3+ doped CaLaGa3O7 crystal has potential applications in 2.7 μm laser.
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