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Silica spheres with diameters in the order of 100 µm were coated by Er3+-activated silica-hafnia films and then annealed in order to induce formation and growth of nanocrystals. The spectroscopic and morphologic properties of the spheres have been characterized by photoluminescence and atomic force microscopy techniques, respectively. The preliminary information are discussed, taken in account the...
Silica-based sol–gel waveguides activated by Er 3+ ions are one of the most important materials for integrated optics devices. In this paper, we present an alternative method combining sol–gel route and CO 2 laser annealing for planar optical waveguides processing. The effects of pulsed and continuous CO 2 laser irradiation on the optical and spectroscopic properties of SiO...
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