Prototype holographic data storage drive with wavefront compensation for playback of 8K video data

We developed a prototype holographic data storage drive and verified the feasibility of using it for archival purposes. Holograms recorded on a recording medium become distorted as a result of photopolymerization and changes in ambient temperature. For stable reproduction, wavefront compensation technology was incorporated in the drive. The hologram distortion was optically compensated by controlling the wavefront of the laser beam. We also applied this method to the wavelength adjustment in data reproduction and confirmed that it expanded the wavelength shift margin. We configured the drive for 8K UHDTV playback and successfully reproduced compressed 8K UHDTV video stream data recorded on a holographic disc in real time.