Thermal fixing of holographic gratings in nearly stoichiometric LiNbO3 crystals

G Mandula, K Lengyel, Laszlo Kovacs, Mostafa Ellabban, Romano Rupp, Martin Fally

    Veröffentlichungen: Beitrag in FachzeitschriftMeeting Abstract/Conference PaperPeer Reviewed


    The thermal decay of holographic gratings recorded using the conventional two-wave mixing technique has been studied in congruent and nearly stoichiometric LiNbO3 crystals doped with Mn. The activation energies of this process have been determined in the 70-130°C range for congruent and 20-80°C range for nearly stoichiometric crystals, the obtained values being 1.06 ‘ 0.03 and 1.10 ‘ 0.03 eV, respectively. The kinetics of the OH absorption spectrum has also been studied in undoped nearly stoichiometric LiNbO3 between 40-120°C. The time dependence of the band intensities can be characterized by exponential time constants obeying the Arrhenius-law. The average activation energy, Ea ˜ 1.1 ‘ 0.1 eV is in good agreement with those obtained from the thermal decay indicating that the hologram fixing process in nearly stoichiometric LiNbO3 is governed by proton migration.
    Seiten (von - bis)226-230
    FachzeitschriftProceedings of SPIE
    PublikationsstatusVeröffentlicht - 2000
    VeranstaltungInternational Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals - Zakopane, Polen
    Dauer: 9 Okt. 2000 → …

    ÖFOS 2012

    • 1030 Physik, Astronomie