Photorefractive lithium niobate (LiNbO{sub}3) ia a promising material for holographic data storage due to its large dark storage time. To overcome the problem of erasure of the stored information during readout, two-color recording with cw laser light has been demonstrated in near-stoichiometric LiNbO{sub}3 and in reduced congruent LiTaO{sub}3, respectively. We present experimental results of nonvolatile holographic storage in near-stoichiometric copper-doped LiNhO{sub}3. These crystals show an improved resistance against the erasure during reconstruction of stored holograms, and dark storage times of several months are obtained.
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