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Recent advances in optical near-field recording for high density data storage

Guangdianzi Jiguang/Journal of Optoelectronics Laser 1998年 9卷 293-295页

作者： Lim, Tuan-Kay Nanyang Technological Univ Singapore Singapore

The recent progress in high-density recording using different optical delivery method and recording media is discussed. The various aspects associated with this recording technology, namely, fiber probe fabrication and characterization, light propagation and confinement, and control mechanisms are presented. It is clear that further development towards the practical implementation of near-field-recording requires innovative approaches that could significantly improve the optical transmission efficiency and the recording speed.

关键词： optical recording

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optical data storage by electromagnetically induced transparency and nondegenerate four-wave mixing in a spectral hole-burning solid

Optical data storage by electromagnetically induced transpar...

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conference on Lasers and Electro-Optics (CLEO)

作者： B.S. Ham M.S. Shahriar M.K. Kim P.R. Hemmer Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA USA Physics Department University of South Florida Tampa FL USA Rome Laboratory Hanscom Air Force Base MA USA

ISBN: (纸本)1557525404

Summary form only given. We demonstrated two bits of optical data storage by a novel technique of electromagnetically induced transparency (EIT)-excited spin echoes. This experiment demonstrates the potential of high-density and fast optical data memory at high temperature. We show its first application to optical data storage using spin photon echo excited by two-photon resonance.

关键词： optical mixing Memory optical sensors optical signal processing Nonlinear optics Optimized production technology optical modulation Solids Temperature sensors Stimulated emission

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Case for automated tape in clinical imaging

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Journal of Digital Imaging 1998年第3 SUPPL 1期11卷 [d]42-45页

作者： Bookman, Geoffrey Baune, Donald Storage Technology Corp Salt Lake City UT United States

Electronic archiving of radiology images over many years will require many terabytes of storage with a need for rapid retrieval of these images. As more large PACS installations are installed and implemented, a data crisis occurs. The ability to store this large amount of data using the traditional method of optical jukeboxes or online disk alone becomes an unworkable solution. The amount of floor space, number of optical jukeboxes, and off-line shelf storage required to store the images becomes unmanageable. With the recent advances in tape and tape drives, the use of tape for long term storage of PACS data has become the preferred alternative. A PACS system consisting of a centrally managed system of RAID disk, software and at the heart of the system, tape, presents a solution that for the first time solves the problems of multi-modality high end PACS, non-DICOM image, electronic medical record and ADT data storage. This paper will examine the installation of the University of Utah, Department of Radiology PACS system and the integration of automated tape archive. The tape archive is also capable of storing data other than traditional PACS data. The implementation of an automated data archive to serve the many other needs of a large hospital will also be discussed. This will include the integration of a filmless cardiology department and the backup/archival needs of a traditional MIS department. The need for high bandwidth to tape with a large RAID cache will be examined and how with an interface to a RIS pre-fetch engine, tape can be a superior solution to optical platters or other archival solutions. The data management software will be discussed in detail. The performance and cost of RAID disk cache and automated tape compared to a solution that includes optical will be examined.

关键词： Diagnostic radiography

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Distributed knowledge networks

Distributed knowledge networks

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IEEE Information technology conference

作者： V. Honavar L. Miller J. Wong Artificial Intelligence Research Laboratory Department of Computer Science Iowa State University Ames IA USA

Distributed knowledge networks (DKN) provide some of the key enabling technologies for translating recent advances in automated data acquisition, digital storage, computers and communications into fundamental advances in organizational decision support, data analysis, and related applications. DKN include computational tools for accessing, organizing, transforming, and analyzing the contents of heterogeneous, distributed data and knowledge sources and for distributed problem solving and decision making under tight time, resource, and performance constraints. The paper presents an overview of the DKN project in the Iowa State University Artificial Intelligence Laboratory.

关键词： Distributed computing data acquisition storage automation Computer networks data analysis Application software Computer applications Organizing Performance analysis Problem-solving

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Current issues in rewritable optical disk data storage

Current issues in rewritable optical disk data storage

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Biennial IEEE International conference on Nonvolatile Memory technology

作者： M. Mansuripur Optical Sciences Center University of Arizona Tucson Tucson AZ USA

Summary form only given. The current trend in rewritable optical data storage is toward the use of novel techniques to achieve densities and data rates that are superior to those achievable in hard disk magnetic recording. We describe the methodology and potential advantages/disadvantages of the solid immersion lens (SIL), front-surface recording, magnetic super resolution (MSR), land & groove recording, and partial response maximum likelihood detection (PRML). We also discuss the differences between magneto-optical and phase-change media.

关键词： Memory optical recording Magnetooptic recording Disk recording Hard disks Magnetic recording Solids Lenses Land surface Maximum likelihood detection

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Dynamic data mining using an electro-optical data warehouse

Dynamic data mining using an electro-optical data warehouse

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IEEE Information technology conference

作者： P.B. Berra P.A. Mitkas R.A. Liuzzi PBB Systems Wright State University Canastota NY USA Electrical and Computer Engineering Colorado State University Fort Collins CO USA Air Force Research Laboratory Rome NY USA

Large information systems that manage terabytes of data must provide rich functionality so that interesting new applications can be addressed. Since a wealth of data, information and knowledge are resident within these vast repositories, a variety of knowledge discovery techniques have developed. These techniques are very computationally intensive and require the movement of large amounts of data. In the search for new approaches, optics may be able to help since photons have the very attractive properties of high speed, non-interference, and parallelism. optical systems can accommodate a large number of parallel, high-bandwidth channels and optical storage devices have very high storage densities. In this research the authors postulate an electro-optical computer architecture and examine the feasibility of executing a number of alphanumeric and image knowledge discovery algorithms on large multimedia data/knowledge bases with the purpose of increasing performance and functionality.

关键词： data mining data warehouses High speed optical techniques Holography Holographic optical components optical interconnections optical computing Electron optics optical devices Parallel processing

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advances in 3D two-photon optical storage devices

Advances in 3D two-photon optical storage devices

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Biennial IEEE International conference on Nonvolatile Memory technology

作者： A.S. Dvornikov I. Cokgor F.B. McCormick S.E. Esener P.M. Renzepis Department of Chemistry University of California Irvine CA USA CalVRecall Inc. San Diego CA USA

The materials and method for storing and accessing information in 3D by means of two-photon absorption is described. The materials used have very high two photon absorption cross-section and near unit quantum efficiency for fluorescence. The storage devices are composed of organic molecules uniformly dispersed in polymer matrices. The binary codes zero and one correspond to two different structures of the same molecule induced by simultaneous absorption of two photons. Information writing and accessing can be performed either bit by bit or in a 2D multibit plane format. Fatigue studies suggest that these materials are suitable for 3D storage devices. Automated recording and readout 3D systems have been constructed and characterized. Channel error sources have been identified and a custom spatial bit-error-rate test has been developed.

关键词： optical devices Absorption optical materials Material storage optical polymers Fluorescence Active matrix organic light emitting diodes Binary codes Writing Fatigue

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advances in InGaN technology for light-emitting diodes and semiconductor lasers

Advances in InGaN technology for light-emitting diodes and s...

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High-Temperature Electronic Materials, Devices and Sensors conference,

作者： S. Rudaz R. Fletcher Optoelectronics Division Hewlett Packard Company San Jose CA USA

The past ten years have seen a virtual revolution for the optoelectronics industry dealing with LEDs. With the development of new III-V materials, such as AlGaAs, AlInGaP, and InGaN, and epitaxial structures capable of very efficient visible light generation, a vast new field of applications for LEDs has opened. The most recent development has been the introduction of bright blue and green LEDs based on InGaN. This now makes coverage of the entire color spectrum possible, from red to violet at brightness and efficiency levels exceeding conventional filament light sources. Full-color large screen video displays with excellent color rendition and brightness and even white light LEDs are being produced. Semiconductor lasers have also benefitted from progress with InGaN technology, and have been demonstrated with emission wavelengths around 400 nm. The primary importance of these devices is in the area of CD data storage, where the short wavelength increases storage density by approximately a factor of four over current systems using a red AlInGaP or infrared AlGaAs laser. Despite these advances, we have barely begun to see the possibilities for LEDs. Continuing improvements in materials and device efficiency and light extraction techniques are set to raise performance limits by at least a factor of two for InGaN and AlInGaP devices over the next few years. This presentation focuses on the advances that have been achieved with InGaN materials technology and the types of devices that have been created. Current applications and possible future use for high performance blue LEDs and lasers are also discussed.

关键词： Light emitting diodes III-V semiconductor materials Brightness Light sources Large screen displays Semiconductor lasers Memory optical materials data mining Materials science and technology

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Full custom CMOS and BiCMOS OPTO-ASICs

Full custom CMOS and BiCMOS OPTO-ASICs

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International conference on Solid-State and Integrated Circuit technology

作者： H. Zimmermann Lehrstuhl für Halbleitertechnik Christian-Albrechts-Universität Kiel Kiel Germany

Technological and design aspects of optoelectronic integrated circuits (OEICs) as wide-spread CMOS and BiCMOS ASICs are considered. Two examples of read-OEICs for optical storage systems like DVD (digital video disc or digital versatile disc) systems in full custom design will be presented. The advantages of monolithically integrated optoelectronic receiver circuits compared to two-chip solutions with wire-bonded photodetector and amplifier circuits are shown. In addition to the application of OEICs in optical storage systems, the use of CMOS receiver OEICs in optical interconnect technique or as fiber receivers for optical short range data transmission will be appointed.

关键词： BiCMOS integrated circuits optical receivers Stimulated emission DVD optical interconnections CMOS technology Integrated circuit technology CMOS integrated circuits optical design Integrated optoelectronics

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Intelligent mobile agents for information retrieval and knowledge discovery from distributed data and knowledge sources

Intelligent mobile agents for information retrieval and know...

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IEEE Information technology conference

作者： Jihoon Yang V. Honavar L. Miller J. Wong Artificial Intellig-e nce Research Laboratory Department of Computer Science Iowa State University Ames IA USA

Tools for selective proactive as well as reactive information retrieval and knowledge discovery constitute some of the key enabling technologies for managing the data overload and translating recent advances in automated data acquisition, digital storage, computers and communications into fundamental advances in decision support, scientific discovery and related applications. The paper describes an implementation of intelligent, customizable mobile software agents for information retrieval and knowledge discovery from distributed data sources. These tools are part of the distributed knowledge network (DKN) toolbox that is being developed at the Iowa State University's Artificial Intelligence Laboratory. Experiments with retrieval of journal paper abstracts demonstrate the feasibility of using machine learning to design mobile intelligent agents for customized information retrieval. A similar approach has been successfully employed for knowledge discovery (using machine learning) from distributed data collections.

关键词： Intelligent agent Mobile agents Information retrieval Artificial intelligence Machine learning Knowledge management technology management data acquisition storage automation Mobile communication

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