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Applied Optics

Applied Optics


  • Vol. 40, Iss. 20 — Jul. 10, 2001
  • pp: 3387–3394

Storage density of shift-multiplexed holographic memory

Gregory J. Steckman, Allen Pu, and Demetri Psaltis  »View Author Affiliations

Applied Optics, Vol. 40, Issue 20, pp. 3387-3394 (2001)

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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/µm2 is experimentally demonstrated by use of a 1-mm-thick LiNbO3 crystal as the recording medium.

© 2001 Optical Society of America

OCIS Codes
(090.4220) Holography : Multiplex holography
(090.7330) Holography : Volume gratings
(210.2860) Optical data storage : Holographic and volume memories

Original Manuscript: April 26, 2000
Revised Manuscript: March 20, 2001
Published: July 10, 2001

Gregory J. Steckman, Allen Pu, and Demetri Psaltis, "Storage density of shift-multiplexed holographic memory," Appl. Opt. 40, 3387-3394 (2001)

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