Investigation on photorefractive properties of doped lithium niobate by H. T. Li, Y. X. Fan, F. Y. Guo, S. H. Zhang, and L. C. Zhao

Crystal Research and Technology

Cryst. Res. Technol. 42, 1014 (2007) - Abstract -

Investigation on photorefractive properties of doped lithium niobate

H. T. Li, Y. X. Fan, F. Y. Guo, S. H. Zhang, and L. C. Zhao

School of Material Science and Engineering, Harbin Institute of Technology, PO. Box 405, Harbin 15001, P. R. China

Keywords	lithium niobate, photorefractive properties, IR absorption spectrum
PACS	42.70.Nq, 61.80.Ba, 71.35.Cc
DOI	10.1002/crat.200710945

Cu:LiNbO₃ crystal and Fe:Cu:LiNbO₃ crystals were grown by the Czochralski method from congruent melt. The OH^- absorption spectrum of doped lithium niobate crystals was measured. The photorefractive properties of doped crystals were studied by the two-wave coupling method. The results of the two-wave coupling experiments showed that as the concentration of doping ions increased, the diffraction efficiency and the dynamic range enhanced, the holographic response time shortened. The recording time of Fe(0.10wt%): Cu(0.10wt%): LiNbO₃ crystal is only a tenth of that of Cu(0.05wt%): LiNbO₃ crystal. Among all samples, the dynamic range of the Fe(0.10wt%): Cu(0.10wt%): LiNbO₃ crystal was the most largest (up to 40.78).

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