Compact holographic memory system using a one-beam geometry in a photorefractive crystal

We have demonstrated a compact holographic memory system by using a one-beam geometry, which eliminates the process of dividing the incident beam into object and reference beams, by using a 635 nm laser diode as a compact light source. As the recording media, a photorefractive crystal (Fe-doped 45° cut LiNbO3) is used. One crucial advantage of the developed system is improved mechanical stability because hologram recording is sensitive to mechanical vibrations. An image is successfully recorded and reconstructed, and the ability of the system is also discussed.