International Symposium on Optical Memory and Optical Data Storage Topical Meeting
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Holographic storage - elegant technology, elusive product
- Trang 138-140
This article gives a review of holographic data storage, and covers such topics as: history and development; technological issues; recording media; recording and recreation systems; future outlook and prospects.
#Holography #Photorefractive materials #Optical materials #Optical recording #Optical distortion #Optical modulation #Holographic optical components #Liquid crystal displays #Sensor arrays #Costs
Holographic ROM system for high-speed replication
- Trang 144-146
Conventional holographic memory systems have generally focused on a page-oriented storage approach. One common characteristic of these systems is that they require the recording of thousands of separate holograms, whether as local pages or individually placed bits, in order to fill the memory to capacity. While such configurations are suitable for write-once read-many (WORM) or rewritable memories......
#Holography #Read only memory #Holographic optical components #Optical recording #Optical arrays #Sensor arrays #High speed optical techniques #Optical modulation #Read-write memory #Mirrors
Readout signal analysis of optical disk based on an approximated vector diffraction theory
- Trang 305-307
This paper proposes an approximation method of readout signal simulation for read-only optical disks based on a vector diffraction model. The boundary condition at the recorded surface is assumed to be described by a complex tensor reflectivity, which corresponds to the complex scalar reflectivity in the case of scalar diffraction model. The formulation of the readout signal is similar to the scal......
#Signal analysis #Optical diffraction #Optical recording #Optical surface waves #Disk recording #Reflectivity #Optical reflection #Fourier transforms #Optical refraction #Optical variables control
Gap servo system for a biaxial device using an optical gap signal in a near field readout system
- Trang 287-289
An optical head with a biaxial device is considered to be the most promising device for a practical optical disc system. However, since it has a long working range of hundreds of micrometers and high voltage sensitivity, a new technique is required for applying a gap servo in a near field system. In particular, the overshoot upon starting a gap servo is a severe problem. An overshoot of less than ......
#Optical devices #Servomechanisms #Optical sensors #Optical surface waves #Lenses #Servosystems #Tellurium #Digital video broadcasting
DVD system software simulator
- Trang 329-331
Software tool is developed for the optical disk drive functions simulation. Disks of DVD-ROM/R/RW/RAM and CD-ROM/R/RW formats are supported. Modeling of pick-up optics with diffraction calculation and servo loops dynamics is included.
#DVD #System software #Optical recording #Optical filters #Laser modes #Analytical models #Signal processing #Servomechanisms #Disk recording #RF signals
Table of contents - Post deadline session
- Trang i-446 - 2002
Presents the table of contents for Post deadline session papers.
Simulation of the writing and erasing processes of GeSbTe and GeSbTeSn with GeN interlayers in the case of dual level DVR discs
- Trang 132-134
In current research on optical phase change data storage, it is essential to understand accurately the physics underlying writing and erasing processes. Computer simulation combined with the appropriate physical models and experimental data is the most valuable tool available. We have established optical, thermal and phase transformation (thermodynamics and kinetics) models and constructed a simul......
#Writing #Computational modeling #Memory #Physics #Computer simulation #Optical recording #Thermodynamics #Kinetic theory #Predictive models #Video recording
Microholographic storage in photopolymers
- Trang 228-230
A novel approach to 3D optical information storage based on writing and reading of microscopic holographic gratings in a photopolymer layer is investigated. The reflection gratings created by a highly focused laser beam can be used to replace the pit-land structure in a disk-based optical storage system. The modulation range of such 3D microgratings is clearly localized to the focal region of a fo......
#Holography #Holographic optical components #Optical modulation #Optical microscopy #Gratings #Laser beams #Optical recording #Nonhomogeneous media #Writing #Optical reflection
Micro magnetic mechanism and comparison of domain expansion MO schemes toward 100 Gbit/in/sup 2/
- Trang 39-41
To obtain an areal density of 100 Gbit/in/sup 2/, magneto-optical (MO) technologies are attractive from the perspectives of magnetic field modulation recording, magnetic domain expansion readout, and high read/write cyclability. In this paper, we discuss the micro magnetic mechanism and compare the domain expansion MO schemes.
#Magnetic domains #Magnetization #Magnetic domain walls #Magnetic properties #Equations #Coercive force #Atomic layer deposition #Magnetic fields #Magnetic recording #Wire
The concept of high NA(0.85) aspherical single lens for next generation optical disc system
- Trang 31-33
In high density optical disc systems, several methods have been presented which employ an object lens with NA 0.85. Two element objective lenses with NA 0.85 have been developed and tried for next generation optical disc systems. However, we are sure that a single lens is required which would help to achieve a longer working distance and a smaller diameter because the size and the cost will be maj......
#Lenses #Optical design #Optical refraction #Optical variables control #Prototypes #Glass #Optical materials #Production #Error correction #Electronic mail