Lifetimes of thermally fixed holograms in LiNbO_3:Fe crystals

  1. Arizmendi, L. 1
  2. de Miguel-Sanz, E. M. 1
  3. Carrascosa, M. 1
  1. 1 Universidad Autónoma de Madrid
    info

    Universidad Autónoma de Madrid

    Madrid, España

    ROR https://ror.org/01cby8j38

Revista:
Optics Letters

ISSN: 0146-9592,  1539-4794

Any de publicació: 1998

Volum: 23

Número: 12

Pàgines: 960

Tipus: Article

DOI: 10.1364/OL.23.000960 GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Optics Letters

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Resum

The thermal erasure decay at different temperatures of holographic gratings thermally fixed in iron-doped lithium niobate has been exhaustively studied. An activation energy of 0.94 eV was found to be independent of the grating fringe spacing. At a given temperature the decay time is strongly dependent on the grating spacing. This dependence is well fitted to a square fringe spacing law, as predicted theoretically. From the experimental data the room-temperature hologram lifetime under illumination is extrapolated, giving as a result ?(years)=(5.2±0.2)Λ2, with the grating spacing Λ in micrometers.

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