Design of positioning map based on the experiment of collinear holographic data storage system

Due to the rapid development of information technology, the demand for data storage is gradually increasing. People urgently need a storage technology with large capacity, high speed, and low energy consumption to alleviate the storage pressure brought by current data growth. Collinear holographic data storage system has the advantages of high storage density, system stability, simple structure, and miniaturization, which becomes a research hotspot for the new generation of storage technology. Among them, holographic storage materials are the key to improve the performance of holographic storage technology, and the lifespan of storage materials determines the security, integrity, and accessibility of data. However, traditional recording pattern is sensitive to the recording position due to strict bragg condition. It is difficult to accurately locate the recording position when the material is put back in the system after aging experiment. We design a positioning map to help quick locating. The displacement selectivity of the positioning map is poor, which is easy to find in a large range, and the positioning map pattern can be exposed for a long time without disappearing. The polymethyl methacrylate (PQ/PMMA) photopolymer materials doped with phenanthraquinone was tested on the collinear holographic data storage system. The low bit error rate of the material reading data page proved that the design scheme was feasible, and provided a basis for the follow-up study of material life.