TY - JOUR A1 - Miguel Sanz, Eva Mónica de AU - Ambite, E. AU - Arimendi, L. T1 - Developing light intensity dependence of the diffraction efficiency of thermal fixed holograms in LiNbO(3):Fe Y1 - 2009 SN - 09253467 UR - http://hdl.handle.net/11268/874 AB - We observed developing light intensity dependence of the diffraction efficiency of thermally fixed holograms in LiNbO(3):Fe. The diffraction efficiency decreases for low illumination. At high intensity there was obtained a saturation effect. This dependence was weaker for highly oxidized crystals. The proper description of the results seems to require a two-photorefractive-center model. This effect is important from the practical point of view. It has to be considered that one has to provide the adequate illumination conditions in applications of these fixed holograms. (C) 2009 Elsevier B.V. All rights reserved. KW - Photorefraction KW - Lithium Niobate KW - Fixed Holograms KW - Lithium-Niobate Crystals KW - Gratings KW - Origin KW - Filter KW - Materials Science KW - Optics KW - Óptica KW - Ensayo de materiales LA - eng ER -