| dc.description.abstract | In traditional holographic storage systems, the diffraction efficiency during readout decreases exponentially as the number of recorded pages increases. The spacing between tracks during the read-write process is constrained by the number of recorded pages, which reduces the amount of information that can be stored within the same area. Furthermore, crosstalk between pages restricts how close the pages can be, while excessively large page spacing significantly increases the motor′s torque. Additionally, the system requires extremely high sensitivity to the readout position, necessitating very close proximity to the write position to retrieve information. Therefore, achieving high-speed and precise readout processes is extremely challenging under mechanical constraints.
This thesis proposes a holographic storage system that overcomes the aforementioned issues. By altering the traditional recording and readout methods, this system not only improves the diffraction efficiency of multiplexed recordings, which is limited by the M/#, but also reduces the system′s sensitivity to the readout position. This system records multiple pages of information within the same recording area and, by designing the signal light phases of each set of gratings, achieves displacement-added readout signals, resulting in interference at different positions. | en_US |