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22 May 1998Efficient nonvolatile holographic recording in doubly doped lithium niobate
Photorefractive materials are of high interest for read-write holographic data storage. One of the main problems that makes the practical implementation of these memories difficult is the erasure of stored information during read-out. Several solutions like thermal fixing, electrical fixing, and two-step recording have been proposed for this problem'3, but they need some special requirements like heating the crystal, using high electric fields, or high light intensities.