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TeO2-ZnO-La2O3 (TZL) ternary glasses were investigated in order to manufacture step-index optical fibers with low losses the near- and mid-infrared ranges superior mechanical properties. To identify appropriate TZL glass compositions for manufacturing, whole vitreous domain of diagram was explored by characterizing bulk samples from thermal point view. Investigations focused on understanding ho...

Improving the up-conversion efficiency is the key issue in rare earth doped glasses. The quantum efficiency, optical gap, radiative transition rate and lifetimes of excited states are greatly influenced by the optical properties of the host material, ligand field, multi-phonon relaxation processes, impurities, temperature and concentration of rare earth ions. This presentation gives a panoramic...