[Invited Paper] Enhanced Recording Density via Multilevel Phase Retrieval and Correlation-based Multiplexed Recording in Computer-generated Holographic Data Storage

Abstract

Holographic data storage (HDS) is promising technology as novel storage with potentials of larger recording density and higher data transfer rate. A computer-generated hologram (CGH) technique enables the optical configuration of HDS to be in-line and simple and has therefore been applied to HDS. In our previous papers, two approaches for increasing the data density per a data-page and the number of multiplexed holograms in a medium have been adopted to improve the storage density of CGH-based HDS. Multilevel phase data-pages and a phase retrieval technique based on the Fourier fringe analysis have been introduced and the multiplexing technique based on the reference wave correlation has also been employed. In this paper, such the studies are individually introduced, and finally the feasibility of the combination of them are discussed.