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This report results from a contract tasking Technical University of Budapest as follows: The contractor will investigate the comparative evaluation of different optical-system architectures from the point of view of functional parameters (capacity and speed) as well as determination of requirements, specification and technical feasibility of optical, mechanical and electronic subsystems.
This book presents principles and applications to expand the storage space from 2-D to 3-D and even multi-D, including gray scale, color (light with different wavelength), polarization and coherence of light. These actualize the improvements of density, capacity and data transfer rate for optical data storage. Moreover, the applied implementation technologies to make mass data storage devices are described systematically. Some new mediums, which have linear absorption characteristics for different wavelength and intensity to light with high sensitivity, are introduced for multi-wavelength and multi-level optical storage. This book can serve as a useful reference for researchers, engineers, graduate and undergraduate students in material science, information science and optics.
Physical Optics Corporation (POC) investigated the development of an optical data storage system built around a current well-engineered high-speed optical disk system with an innovative diffraction-free micro-optical element to produce a beam (approximately)250 nm wide with (approximately)4-5 mm depth of focus, allowing the system to address data at (approximately)100 Mbits/second and to store it 100 to 1,000 times more densely ((approximately)10 Gbit/in.2) than in present systems. In Phase 1 of this project POC completed a thorough feasibility study by system design and analysis, successfully demonstrated fabrication of the key components, and conducted a proof-of-principle experimental demonstration. Specifically, production of a subwavelength ((approximately)380 nm) large depth of focus ((approximately)4-5 mm) addressing beam was demonstrated by fabricating a special microdiffractive optical element and recording this beam on a standard optical recording disk coated with a photopolymer material.
Very large relational database machines require increased memory bandwidth and parallel processing to complete queries in a reasonable amount of time. Currently the machines achieve their capacity and throughput by employing an array of serial access disks and processors. As these machines grow, however, so will their need for high capacity/bandwidth storage systems. 3D parallel access storage devices have the potential of being able to achieve enormous capacity (1 Tbit/cm3)3 as well as throughput (1 Tbit/sec) and seem well suited for this application. The bit-oriented 3D two-photon memory has a further feature of being able to be accessed in a number of directions. This report examines the potential performance of a biorthogonally accessed 3D two-photon memory for relational database operations with a data organization scheme particular to this approach. The favorable results of this study lead to another study in which the feasibility of building an optoelectronic database data filter to interface with the memory was considered.