Abstract
Laser properties of fluoride and oxide glasses containing neodymium (III), and holmium(III) depend on the pumping efficiency, lifetimes of the excited and terminal levels and stimulated peak cross-sections. We have determined these properties in oxide glass (tellurite) having a composition of 35ZnO:65TeO 2 and fluoride glass (ZBLA) having composition 57ZrF 4:34BaF 2:5LaF 3:4AlF 3, or (PBLA) having a composition 36PbF 2: 24ZnF 2:35GaF 3:3YF 3:2AlF 3 for neodymium(III) and holmium(III). It was shown that multiphonon relaxation (in the case of energy difference less than 3000 cm −1) is always orders of magnitude lower in the fluoride glass than in the tellurite glass, which was chosen as a model for oxide glass. No significant difference was found for concentration quenching between the two kinds of glasses.
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