Data storage on holographic memory card

P. Koppa, G. Erdei, F. Ujhelyi, P. Varhegyi, T. Ujvari, E. Lorincz, G. Szarvas, S. Hvilsted, P. S. Ramanujam, P. Richter

Research output: Conference article

1 Citation (Scopus)

Abstract

Our goal is to develop a rewritable holographic memory card system based on thin film polymer media on credit card size plastic carriers. Data is stored in our system in form of polarization holograms that present high efficiency and excellent suppression of higher orders even for thin material. Data is written on the card in a parallel way using spatial light modulators to encode the object beam that is Fourier transformed by a custom objective lens and 'interferes' with the reference beam (of orthogonal polarization) on the card. We use reflective carrier in order to read out the data from the same side of the card. This allows us to have a compact system and standard ID 1 type carrier card. The optical system and the data organization are optimized to have a data density higher than 1bit/μm2. We expect to pass the limit of 10 bit/μm2 with the introduction of phase coded multiplexing that would provide more than 2Gbyte capacity if using half the card area as active surface.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4149
Publication statusPublished - jan. 1 2000
EventHolography 2000 - ST.olten, Austria
Duration: júl. 10 2000júl. 14 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Koppa, P., Erdei, G., Ujhelyi, F., Varhegyi, P., Ujvari, T., Lorincz, E., Szarvas, G., Hvilsted, S., Ramanujam, P. S., & Richter, P. (2000). Data storage on holographic memory card. Proceedings of SPIE - The International Society for Optical Engineering, 4149, 309-314.