KEYWORDS: Optical storage, Multilayers, Optical discs, Data centers, Objectives, Monochromatic aberrations, Liquid crystals, Signal to noise ratio, Transmittance, Signal detection
Nowadays, big-data centers still rely on hard drives. However, there is strong evidence that these
surface-storage technologies are approaching fundamental limits that may be difficult to overcome, as
ever-smaller bits become less thermally stable and harder to access. An intriguing approach for next
generation data-storage is to use light to store information throughout the three-dimensional volume of
a material. In this paper, a review of the major achievements of multilayer optical storage by
pre-layered scheme from 2003 is presented and the key technique details are discussed. The authors
conclude that multilayer optical storage techniques by pre-layered scheme could be the strong
candidates for big data center in the years to come.
KEYWORDS: Sensors, Phase modulation, Optical storage, Signal detection, Data storage, Digital video discs, Binary data, Neon, Detection and tracking algorithms, Tolerancing
An architecture and a kind of method are proposed for designing Viterbi Detector of NVD (Next-genertion Versatile Disc) system based on specific partial-response channels by us. It offers a standard design framework and process, leading to a simple and convenient design. The architecture and method are verified in both simulation test and hardware description with complete function and good performance. The schema and method are used to accomplish a partial response channel for PR[1 2 2 2 1] Viterbi detector in NVD systems, and to achieve the goal of the software simulation and hardware description.
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