Abstract
The optical properties of Er 3+ doped Ca 2 Al 2 SiO 7 (CAS) and SrLaGa 3 O 7 (SLG) are described in this paper. Er 3+ solubility is determined for the two laser hosts. Cross-relaxation processes and multiphonon desexcitation are observed and the relative rates are calculated with the frame of the Judd-Ofelt analysis. Er:SLG presents some longer lifetimes and smaller multiphonon non radiative contribution than the Er:CAS. Both laser hosts present a broad and intensive emission around 1.5 μm. In this paper are also discussed the mechanisms that can reduce the laser oscillation efficiency
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