Abstract
Spectral properties of Yb3+∕Ni2+ codoped transparent silicate glass ceramics containing LiGa5O8 nanocrystals were investigated. The near-infrared emission intensity of Ni2+ was largely increased with Yb3+ codoping due to Yb3+→Ni2+ energy transfer. The qualitative calculation of the energy transfer constant Cs-a and rate Ps-a showed that the Yb3+→Ni2+ energy transfer was much greater than in the opposite direction. Yb3+∕Ni2+ codoped glass ceramics with 0.75mol% Yb2O3 exhibited a near-infrared emission with full width at half maximum of 290nm and fluorescent lifetime of 920μs. The glass ceramics are promising for broadband optical amplification.
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