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

We propose what we believe to be 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 5ms exposure time and stable multiplexed recording at 150Hz. The proposed technique represents a significant step toward the realization of practical HDS systems.