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24 May 2000 Localized holographic recording in doubly doped lithium niobate
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Proceedings Volume 4089, Optics in Computing 2000; (2000)
Event: 2000 International Topical Meeting on Optics in Computing (OC2000), 2000, Quebec City, Canada
In holographic data storage, pages of information are overlapped in the volume of the recording medium. Due to destructive read-out of holograms in photorefractive crystals such as LiNbO3:Fe, holograms are recorded with an exposure schedule in order to equalize diffraction efficiency. This leads to a final diffraction efficiency proportional to 1/M2, where M is the number of exposures. Coherent erasure of a particular page also erases all the other pages stored in the same volume. We believe to have found a technique that does not require an exposure schedule and that can record M holograms with diffraction efficiency following a 1/M dependence. Our technique is based on non-destructive read-out in doubly-doped LiNbO3. The technique is based on the recording of localized holograms in thin layers across the volume of the crystal.
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Christophe Moser, Benjamin Schupp, Irena Maravic, and Demetri Psaltis "Localized holographic recording in doubly doped lithium niobate", Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000);

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