Three-dimensional optical disk data storage via the localized alteration of a format hologram
Applied Optics, Vol. 47, Issue 14, pp. 2696-2707 (2008)
http://dx.doi.org/10.1364/AO.47.002696
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Abstract
Three-dimensional optical data storage is demonstrated in an initially homogenous volume by first recording a reflection grating in a holographic photopolymer. This causes the entire volume to be weakly reflecting to a confocal read/write head. Superposition of two or three such gratings with slightly different k-vectors creates a track and layer structure that specialized servo detection optics can use to lock the focus to these deeply-buried tracks. Writing is accomplished by locally modifying the reflectivity of the preexisting hologram. This modification can take the form of ablation, inelastic deformation via heating at the focus, or erasure via linear or two-photon continued polymerization in the previously unexposed fringes of the hologram. Storage by each method is demonstrated with up to eight data layers separated by as little as
© 2008 Optical Society of America
OCIS Codes
(090.4220) Holography : Multiplex holography
(160.5470) Materials : Polymers
(180.1790) Microscopy : Confocal microscopy
(210.2860) Optical data storage : Holographic and volume memories
(210.4590) Optical data storage : Optical disks
ToC Category:
Optical Data Storage
History
Original Manuscript: January 3, 2008
Manuscript Accepted: February 14, 2008
Published: May 7, 2008
Citation
R. R. McLeod, A. J. Daiber, T. Honda, M. E. McDonald, T. L. Robertson, T. Slagle, S. L. Sochava, and L. Hesselink, "Three-dimensional optical disk data storage via the localized alteration of a format hologram," Appl. Opt. 47, 2696-2707 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-14-2696
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