The Fluorescence Properties of Eu³⁺ in Various Glasses and the Energy Transfer Between Eu³⁺ and Sm³⁺ in Borosilico-phosphate Glass

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For obtaining shorter wavelength laser glass without using nonlinear optical crystal, The fluorescence properties of Eu³⁺ were investigated in various glasses. The Eu³⁺ dopedborosilico-phosphate glass has the highest emission intensity of ⁵D0→→⁷F₂ transition comparedwith other glasses, because it can be doped with high concentration of Eu³⁺. The energy transferand energy backtransfer in Eu³⁺ -Sm³⁺ doped borosilico-phosphate glasses were also investigated. The energy transfer from Sm³⁺ to Eu³⁺ is very efficient and the energy backtransferfrom Eu³⁺ to Sm³⁺ is low. The Eu³⁺ -Sm³⁺ doped borosilico-phosphate glass has a verystrong emission in visible range (0.61μm) for the ⁵D0→→⁷F₂ (Eu³⁺) transition. The emission intensityis about the same as Nd³⁺ doped phosphate glass (LHG8) at 1.06μm.