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Topical Meeting on optical data storage

作者： Heinz, Bernd Eisenhammer, Thomas Dubs, Martin Yavaser, Cein Pfaff, Thomas Unaxis Balzers AG FL-9496 Balzers Liechtenstein

A spin coating technology for the 100 micron cover layer for Blu-Ray Disc production has been developed. The process includes a controlled manipulation of the viscosity of the lacquer with heat and UV light during spi... 详细信息

ISBN: (纸本)0780394941

关键词： Coating Ultraviolet radiation Thin film coatings Humidity optical storage Silicon Manufacturing Standards development Digital video discs Process control

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SERODS: A new medium for high-density optical data storage

SERODS: A new medium for high-density optical data storage

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conference on optical data storage '98

作者： Vo-Dinh, T Stokes, DL Oak Ridge Natl Lab Div Life Sci Adv Monitoring Dev Grp Oak Ridge TN 37831 USA

ISBN: (纸本)0819428515

A new optical data storage technology based on the surface-enhanced Raman scattering (SERS) effect has been developed for high-density optical memory and three-dimensional data storage. With the surface-enhanced Raman optical data storage (SERODS) technology, the molecular interactions between the optical layer molecules and the nanostructured metal substrate are modified by the writing laser, changing their SERS properties to encode information as bits. Since the SERS properties are extremely sensitive to molecular nano-environments, very small "spectrochemical holes" approaching the diffraction limit can be produced for the writing process. The SERODS device uses a reading laser to induce the SERS emission of molecules on the disk and a photometric detector tuned to the frequency of the Raman spectrum to retrieve the stored information. The results illustrate that SERODS is capable of three-dimensional data storage and has the potential to achieve higher storage density than currently available optical data storage systems.

关键词： Surface enhanced Raman spectroscopy Molecules optical storage data storage Molecular lasers Molecular interactions Signal detection 3D optical data storage Near field optics Raman scattering

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Crosstalk Analysis of Multilayer Collinear Volume Holographic data storage

Crosstalk Analysis of Multilayer Collinear Volume Holographi...

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conference on Photonic Fiber and Crystal Devices - advances in Materials and Innovations in Device Applications VII

作者： Liu, Jinqiu Cao, Liangcai Li, Chengmingyue Li, Jianhua He, Qingsheng Jin, Guofan Tsinghua Univ State Key Lab Precis Measurement Technol & Instru Beijing 100084 Peoples R China

ISBN: (纸本)9780819496973

An optical model to describe the reconstructed image of the collinear holographic data storage system is presented. The 2-D shape of the recording spot in the medium is simulated. The system structure parameters that influence the signal-to-noise ratio (SNR) of the reconstructed image are investigated in order to choose proper optical components to improve data storage density of the system. The role of the random binary phase mask (RBPM) utilized in the multilayer collinear holographic system is investigated. It is proved that the inter-layer crosstalk can be effectively suppressed by using different RBPMs. Different layers of data pages can be recorded with the SNR increased by a factor of six at least and the shift selectivity along z-axis can also be improved significantly.

关键词： Holographic data storage multilayer collinear system random binary phase mask cross talk

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Chip-scale optical interconnects and optical data processing using silicon photonic devices

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PHOTONIC NETWORK COMMUNICATIONS 2016年第2期31卷 353-372页

作者： Wang, Jian Huazhong Univ Sci & Technol Sch Opt & Elect Informat Wuhan Natl Lab Optoelect Wuhan 430074 Hunan Peoples R China

Recent advances in the density and complexity of photonic integrated circuits have facilitated possible implementation of chip-scale optical communication systems. Chip-scale optical interconnects and optical data processing are two important functions to transmit and process signal in the optical domain. Silicon photonics offers a promising platform to enable chip-scale optical interconnects and optical data processing using silicon photonic devices. In this paper, we review our recent progress in the design, modeling, and fabrication of silicon photonic devices and their applications in chip-scale optical interconnects and optical data processing with advanced modulation formats. For chip-scale optical interconnects, we experimentally demonstrate digital signal transmissions in silicon microring and silicon vertical slot waveguide. Terabit chip-scale optical interconnect is demonstrated in the experiment. Also, we experimentally demonstrate analog signal transmissions in silicon microring and silicon photonic crystal nanocavity. For chip-scale optical data processing, we experimentally demonstrate all-optical wavelength conversion using a silicon waveguide, simultaneous polarization and wavelength demultiplexing using 2D grating coupler connected with microrings, two-mode (de)multiplexing using a tapered asymmetrical grating-assisted contra-directional coupler, and two-/three-mode (de)multiplexing using asymmetrical directional converter. In addition, we propose and simulate chip-scale optical data exchange, chip-scale high-base optical computing, and chip-scale optical coding/decoding by using nonlinear interactions in a silicon-organic hybrid slot waveguide. The obtained theoretical and experimental results of chip-scale optical interconnects and optical data processing indicate possible integration of optical communication functions on a monolithic chip.

关键词： optical interconnect optical data processing optical communications Advanced modulation formats Photonic integrated circuits Silicon photonics

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Holographic information storage system: Today and future

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IEEE TRANSACTIONS ON MAGNETICS 2007年第2期43卷 943-947页

作者： Horimai, Hideyoshi Tan, Xiaodi OPTWARE Corp Kohoku Ku Kanagawa 2220033 Japan CREST Japan Sci & Technol Agcy Kawagoe Saitama 3320012 Japan

Holographic information storage systems using Collinear Technologies is proposed by Optware Corporation, Yokohama, Kanagawa, Japan, and in which the information and reference beams are modulated coaxially by the same spatial light modulator (SLM). With this unique configuration, the optical pickup can be designed as small as the DVDs and can be placed on one side of the recording disk. In a Holographic Versatile Disc (HVD) structure, the preformatted metadata reflective layer is used for the focus/tracking servo and reading address information, and the dichroic mirror layer is used for detecting holographic recording information without interfering with the preformatted information. A two-dimensional (2-D) digital page data format is used, and the shift-multiplexing method is employed to increased recording density of HVD. Experimental and theoretical studies suggest that the holographic material is very effective to increased recording density of the system. As the servo technology is being introduced to control the objective lens to be maintained precisely to the disk in the recording and the reconstructing process, a vibration isolator is no longer necessary. HVD will be compatible with existing disk storage systems, like CD and DVD, and enable us to expand its applications into other optical information storage systems.

关键词： disk drives holographic information storage system optical disk optical memories volumetric recording

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Organic charge-transfer complexes for STM-based thermochemical-hole-burning memory

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COORDINATION CHEMISTRY REVIEWS 2010年第9-10期254卷 1151-1168页

作者： Peng, Hailin Liu, Zhongfan Peking Univ State Key Lab Struct Chem Unstable & Stable Speci Coll Chem & Mol Engn Beijing Natl Lab Mol SciCtr Nanochem Beijing 100871 Peoples R China

data storage using scanning probe microscopy (SPM) has attracted great attention because of its nanometer-scale storage capacity We present an overview of the recent advances and representative achievements of SPM-based data storage from the viewpoints of recording techniques including electrical bistability, photoelectrochemical conversion, field-induced charge storage, atomic manipulation or deposition, local oxidation, magneto-optical or magnetic recording, thermally Induced physical deformation or phase change, and so forth Among new SPM-based data storage schemes, a thermochemical-hole-burning (THB) technique was developed in our group This review also summarizes our recent achievements in design and synthesis of organic charge-transfer (CT) complexes towards thermochemical-hole-burning memory, the correlation between hole-burning performances and physicochemical properties of CT complexes, the STM tip design and its effects on the hole-burning performance, as well as studies on the data storage mechanism (C) 2010 Elsevier B V All rights reserved

关键词： Charge-transfer complex Scanning probe microscopy data storage Thermochemical hole burning TCNQ

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Deep Learning Based Gujarati Handwritten Character Recognition 1

Deep Learning Based Gujarati Handwritten Character Recogniti...

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1st International conference on advances in Communication and Computing technology (ICACCT)

作者： Joshi, Dhara S. Risodkar, Yogesh R. Sandip Inst Technol & Res Ctr Dept Elect & Telecommun Engn Nasik Maharashtra India Savitribai Phule Pune Univ Pune Maharashtra India

ISBN: (纸本)9781538609262

optical character recognition is a method of the renovation of pictures of printed text, handwritten documents andtypewritten documents into a document recognized by the machine. This can be used for editing, reduction in storage space etc. So, basically, it relates to posses of teaching and recognition of data. Hence, here a hand written document which is in a form of some local language characters except than English. In this paper, we are using the Gujarati Characters for the recognition into the machine editable format. Deep learning is the method used for identity recognition which will depend on the man-made neural network. Deep learning involves a proper focus on right features of the image to recognize themselves with a negligible assistance from the program. Neural network evolved considering the concept of biological neurons. Accuracy and efficiency are improved by use of deep learning for character recognition.

关键词： Deep learning optical character recognition edge detection K-NN NNC python open CV

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Evaluation of data storage layer thickness best fitted for digital data read-out procedure from hard x-ray optical memory

Evaluation of data storage layer thickness best fitted for d...

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conference on advances in X-Ray/EUV Optics and Components IV

作者： Bezirganyan, Hakob (Jacob) P. Bezirganyan, Siranush E. Bezirganyan, Petros H., Jr. Bezirganyan, Hayk H., Jr. V Grp Inc 33 Wood Ave S2nd Floor Iselin NJ 08830 USA Yerevan State Med Univ Yerevan 0025 Armenia X ROM Inc Glendale CA 91202 USA

ISBN: (纸本)9780819477385

Paper is devoted to further evolution of the concept of ultra-high density hard x-ray storage media - a radically new x-ray - based optical data storage nanotechnology with terabit-scale digital data density per square centimeter of each storage layer of the memory disk. Forthcoming hard x-ray optical data read-out devices will use an ultra-high density information carrier named x-ray optical memory (X-ROM), which consists of crystalline wafer with the generated subsurface amorphous nanometer-size reflecting speckles of x-ray high-reflectivity material. X-ROM is designed for long-term archiving of the large volumes of information and digital data handling via read-out systems operating on x-ray wavelength optics. Digital data read-out procedure from X-ROM is performed via grazing-angle incident x-ray micro beam. X-ray-based optical data storage system detects data by measuring changes in x-ray micro beam intensity reflected from the various surface points of data storage media. Grazing-angle incident x-ray configuration allows the handling of data from very large surface area of X-ROM disk and, consequently, the data read-out speed is much faster than in optical data read-out systems. Aim of paper is detailed evaluation of storage data-layer's effective thickness best fitted for a digital data read-out procedure. Penetration depths of non-homogeneous x-ray wave fields inside crystalline substrate and amorphous speckles of X-ROM are investigated theoretically in case of grazing-angle incidence x-ray backscattering diffraction (GIXB) applied in specular beam suppression mode. It is possible to reduce the effective thickness of data storage layer to a value of less than a single-bit linear size i. e. to reduce effective thickness up to 10 nm, according to performed evaluations.

关键词： theory x-ray optical memory ultra-high density data storage digital data read-out effective thickness of data storage layer grazing-angle incidence x-ray backscattering diffraction specular beam suppression Mathieu functions

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TIME-DOMAIN optical MEMORY IN HOLE-BURNING MATERIALS

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MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND technology SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS 1994年第1期252卷 205-212页

作者： KACHRU, R SHEN, XA BAI, YS [a]Molecular Physics Laboratory SRI International 333 Ravenswood Avenue Menlo Park CA 94025 U.S.A.

We have demonstrated storage of 2 Kbits of data at 40 Mbits/s in the Eu3+ doped Y2SiO5 crystal using the time-domain echo approach. Preventing coherent saturation, caused by the long data pulse train, is critical to the successful implementation of this technique. The experimentally inferred storage capacity of 6 x 10(4) spatial spot demonstrates the potential of this optical memory.

关键词： HOLE-BURNING PHOTO ECHO optical MEMORY

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CD-ROM data storage technology: Benefits and limitations in document publication

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Book Research Quarterly 1989年第4期5卷 37-43页

作者： Gillette, Jay E. Information Networking Institute Bellcore Morristown 07960 NJ 435 South Street 1A140 United States

optical data storage advances and compact disc market acceptance have led to the development of a new mass storage medium, CD-ROM (Compact Disc-Read Only Memory). This article provides a brief overview of the technology;lists the production processes associated with it;outlines its advantages and disadvantages;and provides current costs and storage equivalents. The article continues with an analysis of specific benefits and practical limitations of CD-ROM technology in documentation. © 1990 Springer.

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