A secure data storage system based on phase-encoded thin polarization holograms

Tamás Ujváriwqa, Pal Koppa, Mónika Lovász, Péter Várhegyi, Szilárd Sajti, Emoke Lorincz, Péter Richter

Research output: Contribution to journalArticle

14 Citations (Scopus)


A novel secure data storage architecture based on phase-encoded, thin film, Fourier-type polarization holograms is reported. Efficient data encryption and verification can be obtained by phase modulation of the reference wave introduced by a phase-type spatial light modulator that is imaged onto the hologram plane. A physical model is formulated including phase-encoding, non-linear storage medium behaviour and features of the proposed optical system. A method is proposed and implemented in the form of a custom modelling tool for generating code sets optimal in terms of code number and security level. The utility of the architecture and the achievable securi level are experimentally demonstrated.

Original languageEnglish
Pages (from-to)401-411
Number of pages11
JournalJournal of Optics A: Pure and Applied Optics
Issue number4
Publication statusPublished - Apr 1 2004



  • Data security
  • Data storage
  • Phase encoding
  • Polarization hologram

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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