Holography

Our Role in the Development of Holographic Data Storage

Our company has been actively involved in the advancement of holographic data storage technology, particularly in collaboration with the Budapest University of Technology and Economics. Our contributions focus on the development of polarization holographic data storage in thin polymer films, utilizing azobenzene side-chain polymers. This innovative approach offers high data density, enhanced security, and efficient storage solutions.

Technology Overview

Holographic data storage represents a significant leap forward from traditional storage methods, providing a high-density, secure means of storing vast amounts of data. Unlike conventional storage systems, which use multiplexed transmissive volume holograms, our technology is based on polarization holography. This method ensures high diffraction efficiency and eliminates unwanted diffraction orders, resulting in high-quality holographic images with minimal noise.

Key Achievements

1. Read & Write Systems: We developed a Read & Write holographic memory card system using a green laser (532nm). This system records and reconstructs holograms on credit-card-sized storage media. Key benefits include high data density and non-destructive readout capabilities using different wavelengths for writing and reading (green and red lasers).

2. Read-Only Systems: Complementing the Read & Write system, we also developed a Read-Only system that uses a red laser diode. This system can reconstruct holograms written by the Read & Write unit, demonstrating successful data retrieval with lower data density due to simplified design.

3. Enhanced Security: By applying phase-coded reference waves during the hologram recording process, we significantly enhanced data security. This approach ensures that holograms cannot be read or written using conventional means, offering robust protection against unauthorized access.

4. High Data Density: Our research achieved a volumetric data density of 2 bits/µm³ using 1.5 µm thin films. We are currently working on transferring this density to storage materials up to 2 mm in thickness for mass storage applications.