OPTICAL-PROPERTIES OF ND3+ IONS IN FLUOROPHOSPHATE GLASSES

The optical properties of Nd3+ ions have been investigated in fluoroph osphate glasses of composition Al(PO3)3-BaF2-CaF2-MgF2-AlF3 with diffe rent fluorine to oxygen ratios by using steady-state and time-resolved laser spectroscopy. Judd-Ofelt parameters were derived from the absor ption spectra and used to calculate the F-4(3/2)-->I-4(11/2) stimulate d emission cross section and the F-4(3/2) radiative lifetime. The effe ctive linewidth of the F-4(3/2)-->I-4(11/2) fluorescence spectra narro ws as the fluorine to oxygen ratio increases. The experimental lifetim es, ranging from 472 to 494 mus, show a linear dependence with the flu orine content.