Upconversion of infrared-to-visible light in Pr3+-Yb3+ codoped fluoroindate glass

Abstract Bright fluorescence in the visible range has been observed in Pr 3+ –Yb 3+ doped fluoroindate glass under infrared diode laser irradiation. The mechanism which contributes for the upconversion emission is identified and the energy transfer rate between Pr 3+ –Yb 3+ is obtained for different concentrations.

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