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Multilayer thin-film holographic storage-a new approach

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9 Author(s)
Szarvas, G. ; OPTILINK Hungary Rt, Budapest, Hungary ; Koppa, P. ; Suto, A. ; Varhegyi, P.
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Optilink has developed and presented a polarization holographic reading writing system using 1-2 μm thick storage layer on a card form media. A storage density of 1.3 bit/μm2 has been achieved without multiplexing with sparse code modulation and Fourier-filtering. Because of the use of a thin storage layer, the volume data density is extremely high in the system. Further enhancement of the areal density up to ∼100 bit/μm2 can be achieved in an improved new polarization holographic system using a multilayer media instead of the thin film. A 6f system for reading with a suitable second spatial filter allows separation of the signal from different layers. This technique combines the advantage of the thin film holography with the idea of the confocal filtering.

Published in:

Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on

Date of Conference:

2002