MONOVALENT COPPER LUMINESCENCE IN GLASSES OF BASE COMPOSITION LAMGB5O10 AND LILAP4O12

Parallel investigations of monovalent copper luminescence for Cu+-dope d LaMgB5O10 and LiLaP4O12 glasses are reported. The spectroscopy and t he excited states dynamics were investigated as a function of copper c oncentration and temperature. The broad band blue emission observed fo r both types of glasses arises from isolated Cu+ ions whereas an addit ional orange-red fluorescence, detected only in the phosphate glasses is attributed to (Cu+)(2) pairs. The stimulated emission cross-section s calculated from spontaneous luminescence data are respectively : 4.0 5 10(-21) cm(2) for the berates and 2.26 10(-21)cm(2) for the phosphat es. The characteristics of the luminescent properties are discussed as regard to the glass composition.