Bright fluorescence in the visible range has been observed in Pr3+-Yb3+ doped fluoroindate glass under infrared diode laser irradiation. The mechanism which contributes for the upconversion emission is identified and the energy transfer rate between Pr3+-Yb3+ is obtained for different concentrations.
Bibliographical noteFunding Information:
This work was supported by the Brazilian Agencies Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico (CNPq), Financiadora Nacional de Estudos e Projetos (FINEP), Fundação Coordenação de Aperfeiçoamento de Pessoal de Nı́vel Superior (CAPES), and Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco (FACEPE).
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