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 --> F-7(2)) 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.