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22 May 1998 Fast high-density disk storage by multiplexed microholograms
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Proceedings Volume 3490, Optics in Computing '98; (1998)
Event: Optics in Computing '98, 1998, Bruges, Belgium
The new concept of microholographic data storage allows storage capacities of up to 100 GB on a DVD-sized disc 11/. This concept involves bitwise information storage similar to CD and DVD systems. Instead of using pits, the information is coded in form of holographically recorded, microscopic Bragg-reflectors, located in a thin, photosensitive layer (Fig. 1). Each microholographic Bragg-reflector represents one bit, presuming no coding scheme is applied. Microholograms can be stored overlapping in the same volume by using angle multiplexing, wavelength multiplexing or the combination of both. Such storage of multiple information bits in one single position on the disc increases the storage capacity as well as the data transfer rates by the multiplex factor. In contrast to previous holographic storage systems, the storage media are made of cheap and mass-produceable photopolymer layers instead of expensive crystals. Furthermore, the microholographic storage method can be downward compatible with today's Compact-Disk (CD)- and Digital-Versatile-Disk (DVD) systems.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andreas G.W. Wappelt, Julian Findeisen, Peter Kuemmel, Susanna Orlic, R. Schulz, and Hans Joachim Eichler "Fast high-density disk storage by multiplexed microholograms", Proc. SPIE 3490, Optics in Computing '98, (22 May 1998);

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