Experimental results on the developing kinetics and final diffraction efficiency of fixed holograms in iron-doped lithium niobate are presented. Samples with two different oxidation states are studied. The developing kinetics of well-oxidized samples show oscillations superposed to a saturation dependence, whereas they are not present for the less oxidized sample. The final developed ratio is found to depend on the grating spacing and the oxidation state of the samples. All these features are well explained with the charge-transport theory and are found to be dependent on the photovoltaic properties of the samples, doping, and oxidation state. From the analysis of the experimental data, the photovoltaic field amplitude of the samples is obtained.
© 2000 Optical Society of America
(090.2900) Holography : Optical storage materials
(160.5320) Materials : Photorefractive materials
(210.0210) Optical data storage : Optical data storage
(210.4810) Optical data storage : Optical storage-recording materials
Eva M. de Miguel, Josefa Limeres, Mercedes Carrascosa, and Luis Arizmendi, "Study of developing thermal fixed holograms in lithium niobate," J. Opt. Soc. Am. B 17, 1140-1146 (2000)