Efficient Dual Page Reproduction in Holographic Data Storage

An article recently released in Optics Express proposes a simultaneous dual-page reproduction for holographic data storage (HDS) by reusing a transmitted reference beam that passes through a recording medium after data reconstruction.

Holographic data storage (HDS) is a promising next-generation optical storage technology with a large capacity and a high data transfer rate. In particular, one of the features of HDS is its ability to store data for more than 50 years on low-cost recording media.

As the amount of data that needs to be stored increases year by year, the development of recording media such as magnetic recording media and semiconductor memory with high speed and large capacity is increasing rapidly.

Equally, there is an increase in the amount of data that must be stored over long periods of time but is inactive, called ‘cold data’, expanding the need for storage that is not only high-speed and high capacity but also low-cost and can be stored for a long period of time. So far, HDS with a high recording density of 1 Tbit/in2, 2.2 Tbit/in2, and 2.4 Tbit/in2 have been reported.