3D OPTICAL STORAGE TECHNOLOGY technical seminar 4B.pptx

All about 3D optical data storage technology and devices

1. 3D OPTICAL STORAGE TECHNOLOGY M. Abhinaya 19841A0582 CSE-4B

2. Introduction Media and Drive Design Basic Components Processes for creating written data and for reading data Media Form Factor 3D photonic crystals optical-memory systems Commercial Development Applications Advantages Conclusion CONTENTS

3. OPTICAL STORAGE: Conventional storage systems make use of magnetic and semiconductor technologies for data storing in CDs and DVDs. Optical data storage is different from that. The storage is done on an Optical Readable Medium. An optical drive writes data on the optical readable medium i.e., a storage disk. The storage disk then uses a laser beam to burn pits(bumps) into the special material on disk. INTRODUCTION

4. This data stream is placed in a Spiral path, in this case the data begins at the innermost track and works its way towards the edge of the disk. An optical drive is a device in a computer that can read CD-ROMs or other optical disks . It is estimated that in the year 2007, optical storage represents 27% of the world's technological capacity to store information.

5. 3D optical data storage is the term given to any form of optical data storage in which information can be recorded and/or read with three dimensional resolution (as opposed to the two dimensional resolution afforded, for example, by CD).This innovation has the potential to provide byte-level mass storage on DVD-sized disks. Data recording and read back are achieved by focusing lasers within the medium. 3D OPTICAL STORAGE

6. The active part of 3D optical storage media is usually an organic polymer either doped or grafted with the photo chemically active species. Alternatively, crystalline and sol- gel materials have been used. DRIVE DESIGN 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. MEDIA DESIGN

7. Optical data storage system requires certain important materials for its data storage and retrieval processes. The important components required for the optical data storage are: Laser Lens and Mirrors Spatial Light Modulators (SLM) Photosensitive materials Charge Coupled Devices (CCD) Phase masks for encryption BASIC COMPONENTS

8. PROCESSES FOR CREATING WRITTEN DATA   Data recording in a 3D optical storage medium requires that a change take place in the medium upon excitation. If the photochemical change is reversible, then rewritable data storage may be achieved. PROCESSES FOR READING DATA Reading of data from 3D optical memories has been carried out in many different ways. - Measurement of small differences in the refractive index between the two data states. - Linear excitation of fluorescence - has some potential problems because the addressing light interacts with many other data points.

9. Media for 3D optical data storage have been suggested in several form factors: Disc : A disc media offers a progression from CD/DVD, and allows reading and writing to be carried out by the familiar spinning disc method. Card : A credit card form factor media is attractive from the point of view of portability and convenience, but would be of a lower capacity than a disc. Crystal, Cube or Sphere : Several science fiction writers have suggested small solids that store massive amounts of information, and at least in principle this could be achieved with 3D optical data storage. MEDIA FORM FACTOR

10. Different modifications of 3D optical memory units based on photonic band-gap structures can be proposed, depending on the arrangement of writing and reading beams in space, as well as on whether a one-, two-, or multi photon process is used to produce the luminescence readout signal. 3D PHOTONIC CRYSTAL OPTICAL MEMORY SYSTEMS

11. Despite the highly attractive nature of 3D optical data storage, the development of commercial products has taken a significant length of time. This results from limited financial backing in the field, as well as technical issues, including: Destructive reading Thermodynamic stability Media sensitivity COMMERCIAL DEVELOPMENT

12. Wide chance of storing data in a less space such as DVD Servers Databases Social networking and so on as we need to save the data………… APPLICATIONS

13. Durability: With proper care, optical media can last a long time, depending on what kind of optical media you choose. Great for archeiving : Several forms of optical media are write-once read-many, which means that when data is written to them, they cannot be reused. Transportability: Optical media are widely used on other platforms, including the PC. For example, data written on a DVD-RAM can be read on a PC or any other system with an optical device and the same file system. Random access: Optical media provide the capability to pinpoint a particular piece of data stored on it, independent of the other data on the volume or the order in which that data was stored on the volume ADVANTAGES

14. 3D optical data storage is the form of optical data storage which is really a good alternative for the data storage required in now-a-days life which is having a lot of data to store, as it can store about 217 DVD’s in a single disc . Its potential applications for storing and archiving of data that was previously erased for economic reasons holographic disks. Ultra HD S ony and other big companies are interested in this technology. CONCLUSION

15. http://en.wikipedia.org/wiki/3D_optical_data_storage http://www.riken.jp/lab-www/library/publication/review/pdf/No_49/49_052.pdf Hunter, S., Kiamilev, F., Esener, S., et al., 1990, Appl. Opt., 29, 2058. Parthenopoulos, D.A and Rentzepis, P.M., 1989, Science, 245, 643. Dvornikov, A.S., Cokgor, I., McCormick, F.B., et al., 1996, Opt. Commun., 128, 205. REFERENCES

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