An optimized six-dimensional storage system has been investigated theoretically. The system uses multiple beams to create overlapped micro gratings as each storage cell. The cell capacity depends exponentially on the beam wavelength number. With two-photon absorption writing, coherence tomography reading and superresolving beam focusing, this system has extra-large capacity of >1 Pbyte per DVD sized disk (potential ~60 Pbytes per disk), extra-fast reading speed of >117 Gbits/s with high signal-to-noise ratio of >66 dB, large cell sizes (~0.3μm × 6μm) which greatly reduce data addressing difficulties and a standard drive like structure compatible with the CD and DVD disks.
An optical storage system which stores data in three spacial and three physical dimensions is designed and investigated.
Its feasibility has been demonstrated by theoretical derivation and numerical calculation. This system has comprehensive
advantages including very large capacity, ultrafast throughputs, relatively simple structure and compatibility with CD
and DVD. It’s an actually practicable technology. With two-photon absorption writing/erasing and optical coherence
tomography reading, its storage capacity is over 32 Tbytes per DVD sized disk, and its reading speed is over 25 Gbits/s
with high signal-to-noise ratio of over 76 dB. The larger capacity of over 1 Pbyte per disk is potential.