OPTICAL-PROPERTIES OF PURE, ND3-DOPED AND PR3+-DOPED FLUOROINDATE GLASSES()

Fluoroindate glasses doped with Pr3+ or Nd3+ are promising materials f or the development of fluoride fibers, amplifiers and lasers. The opti cal properties of an InF3-SrF2-BaF2-ZnF2-GdF3-NaF composition pure and doped up to 3 mol% have been systematically studied. The extended UV transmission of this glass allows the identification of most of the 8S --> 6P and 8S --> 6I transitions of Gd ions. The optical transitions of Pr3+ and Nd3+ have been identified in absorption between 250 and 10 000 nm. Fluorescence and excitation spectra and lifetime have been mea sured at 300 K. Most of the transitions have been identified.