High-speed recording technique by synchronous movement of media and spherical reference wave for holographic data storage

TL;DR

This paper introduces a high-speed holographic data storage method using synchronized movement of media and spherical reference waves, enabling rapid, continuous, multiplexed recording with demonstrated low error rates.

Contribution

The novel technique eliminates stop-and-go motion in holographic recording, allowing continuous, high-speed data storage with simultaneous reconstruction capabilities.

Findings

Achieved less than 10% bit error rate at 5 ms exposure time.

Demonstrated stable multiplexed recording at 150 Hz.

Enabled rapid, continuous hologram recording without mechanical stops.

Abstract

We propose a novel holographic recording technique to improve the recording speed for holographic data storage (HDS). In this technique, holograms are recorded by scanning a digital micromirror device (DMD) that displays a data page with a focused, power density-increased line beam, while synchronously shifting the recording medium and a spherical reference wave. This approach eliminates the stop-and-go motion of driving mechanisms, enabling rapid, continuous, multiplexed recording. Although the recorded localized holograms retain only partial information about the data page, the entire page can be reconstructed simultaneously using the spherical reference wave. Experimental demonstrations achieved a bit error rate (bER) of less than 10% at a 5 ms exposure time and stable multiplexed recording at 150 Hz. The proposed technique represents a significant step toward the realization of practical HDS systems.