Lifetimes of thermally fixed holograms in LiNbO_3:Fe crystals
- Arizmendi, L. 1
- de Miguel-Sanz, E. M. 1
- Carrascosa, M. 1
-
1
Universidad Autónoma de Madrid
info
ISSN: 0146-9592, 1539-4794
Año de publicación: 1998
Volumen: 23
Número: 12
Páginas: 960
Tipo: Artículo
Otras publicaciones en: Optics Letters
Resumen
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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