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Lithium niobate single crystal has been found to be a versatile material in the field of nonlinear devices due to its
excellent electric-optical, dielectric and nonlinear optical properties. When LiNbO3 device serves as holographic storage
media, it is often required a big dynamic range, a big sensitivity and a high photo-damage resistance ability. Although
Fe-doped LiNb03 in holographic storage is one the most widely investigated crystals and takes on better comprehensive
merits, its performance is severely limited by the low photo-damage resistance ability when LiNbO3 is operated on high
laser intensity. Indium is one of the beneficial impurity ions for suppressing photo damage. In this paper, we grown a
series of Fe:In:LiNb03 crystals with a varying content of In doping by Czochraski technique. On the basis of the
ultraviolet-visible absorption spectra measurement and two-wave coupling experiment, the effect of In ions on
photorefractive properties is explored and discussed systematically. It is found that the photorefractive properties can be
greatly enhanced by In doping in Fe:LiNb03. Among the four samples of Fe:In:LiNbO3 crystals, the Fe:In(2
mol%):LiNbO3 crystal has the highest photorefractive sensitivity and the largest dynamic range (1.79 cmJ-1 and 2.10,
respectively) and can resist higher intensity laser irradiation. Our analysis indicates that increased photoconductivity is
mainly responsible for the excellent photorefractive comprehensive properties. It is believed by the experimental results
that Fe:In(2 mol%):LiNbO3 crystal is a promising holographic storage medium.
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