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Persistent holograms are recorded locally with red light in a LiNbO3 crystal doped with Mg and Fe. Selective erasure is realized by use of a focused UV sensitizing light. We demonstrate the recording of 50 localized images as well as selective erasure in a 4 mm x 4 mm x 4 mm crystal. A comparison of the total recording time for M holograms obtained with the conventional distributed-volume recording and the localized methods is presented. (C) 2000 Optical Society of America. OCIS codes: 090.7330, 210.0210, 210.4680.
Alexandre Schmid, Reza Ranjandish