Study of Holographic Data Storage with High Surrounding Tolerance Technology(3/3)

The fast development in display and communication technology changes the world into a newera of information-blooming, so that big data and clouding computing will play an important role inthe modern world. Accordingly, a data storage technology performing nonvolatile memory, highdensity, high access rate and energy saving is highly demanded. In this point of view, holographicstorage satisfies all characteristics requested in the modern storage technology, and it is regarded asthe one of the best solutions for next-generation technology. In addition, volume holography, owingto various multiplexing schemes, is potentially applicable to many applications such as informationprocessing, biomedical optics, and optical system. However, low tolerance to environment variationis a severe challenge to volume holography for data storage and other applications.Here we propose a three-year project, which is aimed to develop a theoretical model withexperimental verification to describe the tolerance of the diffraction light by the environmentalvariation for collinear holographic storage system, and try to find the solution to keep high reliabilityof the volume holograms for data storage. In the first year, we will develop a model to describe thediffraction tolerance of the volume holograms in a collinear storage system under static condition,where the disc in the reading condition suffers from defocus of the disc, displacement, tilt andvibration. In the second year, we will develop the theoretical model to describe diffraction tolerancein the dynamic writing condition. The theoretical simulation will be verified through thecorresponding experiment precisely. In the third year, we will propose a new design to enlarge thediffraction tolerance for the collinear storage system that suffers from defocus of the disc,displacement, tilt and vibration. At the same time, the new design is capable to perform high storagedensity, high data rate and other related properties.