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  1. No Access

    Article

    Er3+-activated silica inverse opals synthesized by the solgel method

    We present the details of the sol-gel processing used to realize inverse silica opal, where the silica was activated with 0.3 mol% of Er3+ ions. The template (direct opal) was obtained assembling polystyrene sphe...

    A. Chiappini, C. Armellini, A. Chiasera, Y. Jestin, M. Ferrari… in Optoelectronics Letters (2007)

  2. No Access

    Article

    Photoluminescence Spectroscopy of Er3+/Yb3+ Co-Activated Silica-Alumina Monolithic Xerogels

    Two Er3+/Yb3+ monolithic silica-alumina xerogels doped with different Yb3+ concentrations were prepared by sol–gel route. The samples were thermally treated in air at 950°C for 120 h, and Raman and UV-visible-NIR...

    C. Armellini, A. Chiasera, S. Dirè, M. Ferrari… in Journal of Sol-Gel Science and Technology (2004)

  3. No Access

    Article

    Photoluminescence of Erbium-Doped Silicate Sol-Gel Planar Waveguides

    Er3+-doped silica-titania planar waveguides, prepared by sol-gel processing, have a tendency to exhibit a reversible photoluminescence (PL) quenching phenomenon at 1.5 μm, when they are not fully densified. In th...

    R.M. Almeida, A.C. Marques, R. Cabeça… in Journal of Sol-Gel Science and Technology (2004)

  4. No Access

    Article

    Erbium-Activated Silica-Titania Planar Waveguides

    (100 − x)SiO2-(x)TiO2-ErO3/2 planar waveguides, with 7 ≤ x ≤ 20 have been prepared by sol-gel route using the dip-coating technique. The thickness of the films was optimized to support a single propagating mode a...

    L. Zampedri, M. Ferrari, C. Armellini… in Journal of Sol-Gel Science and Technology (2003)

  5. No Access

    Article

    Simulation by Molecular Dynamics of Erbium-Activated Silica-Titania Glasses

    Rare-earth doped silicate-based glasses are widely used in telecommunication technology. A limitation in the performance of active optical devices such as amplifier comes from the rare-earth clustering. Simula...

    C. Bernard, S. Chaussedent, A. Monteil… in Journal of Sol-Gel Science and Technology (2003)

  6. No Access

    Article

    Er3+/Yb3+ Co-Activated Silica-Alumina Monolithic Xerogels

    Monolithic silica xerogels doped with different concentrations of Er3+, Yb3+ and Al3+ were prepared by sol-gel route. Densification was achieved by thermal treatment in air at 950°C for 120 h with a heating rate ...

    A. Chiasera, M. Montagna, R. Rolli, S. Ronchin… in Journal of Sol-Gel Science and Technology (2003)

  7. No Access

    Article

    Nucleation of Titania Nanocrystals in Silica Titania Waveguides

    SiO2(1 − x)-TiO2(x) monomode waveguides at 632.8 nm, with x in the range 0.07–0.2 and thickness of about 0.4 μm, were deposited on silica substrates by a dip-coating technique. Nucleation of TiO2 nanocrystals and...

    M. Montagna, E. Moser, F. Visintain… in Journal of Sol-Gel Science and Technology (2003)

  8. No Access

    Article

    Er-doped silica-based waveguides prepared by different techniques: RF-sputtering, sol-gel and ion-exchange

    Erbium-activated silica-based planar waveguides were prepared by three different technological routes: RF-sputtering, sol–gel and ion exchange. Various parameters of preparation were varied in order to optimiz...

    G.C. Righini, S. Pelli, M. Ferrari, C. Armellini… in Optical and Quantum Electronics (2002)