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3D optical data storage is any form of optical data storage in which information can be recorded or read with three-dimensional resolution (as opposed to the two-dimensional resolution afforded, for example, by CD).
Applications for 3D optical storage are many: distributed computing, multimedia, movies, large web servers, and storage of permanent data (e.g., healthcare data or satellite imagery).
paper, discusses in details the fundamentals of 3D optical data storage. This includes the features of the 3D optical data storage and the major components that make up the devices.
- Overview
- History
- Processes For Creating Written Data
- Processes For Reading Data
- Media Design
- Drive Design
- Development Issues
- Academic Development
- Commercial Development
Current optical data storage media, such as the CD and DVD store data as a series of reflective marks on an internal surface of a disc. In order to increase storage capacity, it is possible for discs to hold two or even more of these data layers, but their number is severely limited since the addressing laser interacts with every layer that it pass...
The origins of the field date back to the 1950s, when Yehuda Hirshberg developed the photochromic spiropyrans and suggested their use in data storage. In the 1970s, Valeri Barachevskii demonstrated that this photochromism could be produced by two-photon excitation, and finally at the end of the 1980s Peter T. Rentzepis showed that this could lead t...
Data recording in a 3D optical storage medium requires that a change take place in the medium upon excitation. This change is generally a photochemical reaction of some sort, although other possibilities exist. Chemical reactions that have been investigated include photoisomerizations, photodecompositions and photobleaching, and polymerization init...
The reading of data from 3D optical memories has been carried out in many different ways. While some of these rely on the nonlinearity of the light-matter interaction to obtain 3D resolution, others use methods that spatially filter the media's linear response. Reading methods include: 1. Two photon absorption (resulting in either absorption or flu...
The active part of 3D optical storage media is usually an organic polymer either doped or grafted with the photochemically active species. Alternatively, crystalline and sol-gelmaterials have been used.
A drive designed to read and write to 3D optical data storage media may have a lot in common with CD/DVD drives, particularly if the form factor and data structure of the media is similar to that of CD or DVD. However, there are a number of notable differences that must be taken into account when designing such a drive, including: 1. Laser. Particu...
Despite the highly attractive nature of 3D optical data storage, the development of commercial products has taken a significant length of time. This is the result of the limited financial backing that 3D optical storage ventures have received, as well as technical issues including: 1. Destructive reading. Since both the reading and the writing of d...
Much of the development of 3D optical data storage has been carried out in universities. The groups that have provided valuable input include: 1. Peter T. Rentzepiswas the originator of this field, and has recently developed materials free from destructive readout. 2. Watt W. Webbdeveloped the two-photon microscope and suggested 3D recording on pho...
In addition to the academic research, several companies have been set up to commercialize 3D optical data storage: 1. Call/Recall was founded by Peter Rentzepis and Sadik Esener, and in May 2007 showed the recording and readout of 253 GB (300 layers of data in a 4.5 mm thick disc, 102 mm in diameter, at CD x1 data rates) with a recording energy of ...
Jul 7, 2021 · Here, we demonstrate that rare earth ions doped transparent glass can be used as 3D optical information storage and data encryption medium based on their reversible transmittance and...
- Zhen Hu, Xiongjian Huang, Zhengwen Yang, Jianbei Qiu, Zhiguo Song, Junying Zhang, Guoping Dong
- 2021
Optical storage is the storage of data on an optically readable medium. Data is recorded by making marks in a pattern that can be read back with the aid of light, usually a laser beam precisely focused on a spinning disc. There are other means of storing data optically and new methods are in development.
Basically, optical storage refers to the storage of data on an optically readable medium. Data are recorded by making marks in a pattern that can be read back with the aid of light (generally laser). Thus optical memory has some innate tech-nological advantages over conventional magnetic and flash memory technologies,
