Fluorescence properties of Eu3+-doped ZrF4 based optical glasses

The parametrization and optical properties such as absorption, photoluminescence (at 300 K and 77 K) and lifetimes of the lasing transition (5D0 to 7F2) of the EuF3 (1 M%)-doped heavy metal fluoride glass (HMFG) systems of: 48ZrF4+24BaF2+7AlF3+20RF where RF=LiF, NaF and KF are studied. These Eu3+ glasses have shown red colour emission from their surfaces as soon as they are illuminated by UV light. By applying the Judd-Ofelt theory to the measured emission level the quantum efficiency ( eta ) has been determined. Based on the luminescence properties described in the paper it is suggested that a glass with composition 48ZrF4+24BaF2+7AlF3+20NaF+1EuF3 would be an ideal system.

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