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Published July 10, 2001 | public
Journal Article Open

Storage Density of Shift-Multiplexed Holographic Memory


The storage density of shift-multiplexed holographic memory is calculated and compared with experimentally achieved densities by use of photorefractive and write-once materials. We consider holographic selectivity as well as the recording material s dynamic range (M /#) and required diffraction efficiencies in formulating the calculations of storage densities, thereby taking into account all major factors limiting the raw storage density achievable with shift-multiplexed holographic storage systems. We show that the M /# is the key factor in limiting storage densities rather than the recording material s thickness for organic materials in which the scatter is relatively high. A storage density of 100 bits m2 is experimentally demonstrated by use of a 1-mm-thick LiNbO3 crystal as the recording medium.

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© Copyright 2001 Optical Society of America Received 26 April 2000; revised manuscript received 20 March 2001. This research was sponsored by the U.S. Air Force Office of Scientific Research and the TRW Foundation. G.J. Steckman acknowledges support from an Intel Foundation Fellowship.


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