Holographic data storage presentation
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Holographic data storage uses lasers and photosensitive materials to store data in three dimensions, allowing for much higher storage capacities than existing magnetic tapes or optical discs. It works by using interference patterns created by splitting a laser into reference and object beams, with the pattern recording data pages in volumes of photosensitive crystals. While it offers terabyte storage capacities and fast data transfer rates, holographic data storage remains expensive compared to existing technologies and may not become widely adopted if another format emerges as the standard.
Holographic data storage presentation
- 1. Holographic data storage Guided by: Vivek Sharma Asst. Professor (CSE/IT) By: Rajneesh Khuttack 05310402712 CSE
- 2. Outline ▪ What is Data Storage? ▪ History of Data Storage. ▪ What is Holography? ▪ Holography Data Storage. ▪ Recording of Data in HDS. ▪ Working of HDS. ▪ Technology Comparison. ▪ Data transfer rate. ▪ Comparison of Storage Discs. ▪ Market Players ▪ Potential Competitors… ▪ Conclusion
- 3. What Is Data Storage? Data storage , is a technology consisting of computer components and recording media used to retain digital data. A modern digital computer represents data using the binary numeral system. The most common unit of storage is the byte, equal to 8 bits. For example, the complete works of Shakespeare, about 1250 pages in print, can be stored in about five megabytes (40 million bits) with one byte per character.
- 4. History of Storage (Magnetic) ▪ Magnetic 1. Tape Used for data, video, and audio Cheap, Ideal for backup 2.Floppy Same technology as tape Cheap, small storage size, portable 3.Hard Drives Faster than tape storage Still evolving
- 5. History of Storage (Optical) Optical 1. Compact Disc Introduced in 1982. 2.DVD Initially intended for Audio/Video use. 3. Blu-Ray High Disk Space.
- 6. What is Holography? Holography is a technique that enables a light field, which is generally the product of a light source scattered off objects, to be recorded and later reconstructed when the original light field is no longer present, due to the absence of the original objects. The overall process requires :- – Coherent Light Beam – BeamSpliter – Mirror – Photographic Plate
- 7. Construction Of Hologram Reconstruction of Hologram
- 8. Holographic Data Storage - HDS ▪ Holographic data storage is a potential technology in the area of high- capacity data storage in the form of multiple images in the same area utilizing light at different angles recording bits in parallel. ▪ Holographic data storage contains information using an optical interference pattern within a thick, photosensitive optical material ▪ The stored data is read through the reproduction of the same reference beam used to create the hologram
- 9. Working of HDS Spatial Light Modulator (SLM) A spatial light modulator is used for creating binary information out of laser light. The SLM is a 2D plane, consisting of pixels which can be turned on and off to create binary 1.s and 0.s.
- 10. Working of HDS Writing The light is split in two by the beam splitter. The signal or object beam will bounce off a mirror and passes through a SLM. The reference beam, on the other hand, takes another course towards the crystal and upon hitting it along with the object beam, creates an interference pattern that will be used to store the information relayed by the object beam in a certain location in the crystal.
- 11. Working of HDS Retrieving: The interference pattern induces modulations in the refractive index of the recording material yielding diffractive volume gratings. The reference beam is used during readout to diffract off of the recorded gratings, reconstructing the stored array of bits. The reconstructed array is projected onto a pixelated detector that reads the data in parallel
- 12. Working of HDS Multiplexing Method of storing multiple pages of data in the hologram is called multiplexing. The thicker the volume becomes, the smaller the modifications to the source beam can be. There are different types of multiplexing ▪ Angular Multiplexing ▪ Wavelength Multiplexing ▪ Spatial Multiplexing ▪ Peristrophic Multiplexing ▪ Shift Multiplexing ▪ Phase-Encoded Multiplexing
- 13. Technology Comparison Data are recorded on to the surface as bit by bit in CD/DVD System 1 Bit Data Surface Recording Layer Substrate Conventional Optical Disc Page- Data Volumetric Recording Layer Page data are recorded into the volumetric recording layer in Holographic recording HVD ~1μm
- 14. Data Transfer Rate 1985 1990 1995 2000 2005 2010 2015 AvailabilityYear 1M 10M 100M 1G 10G 100G DataTransferRate,bits/sec Blu-ray HD DVD 0.1M DVD Tape HISHDD
- 15. Reasons for Developing HDS… ▪ Replacement as a backup media Higher data density than tape and current Hard Drives. Data is stable for an estimated 50 years without degrading. Faster read and write speeds. ▪ Replacement for DVD Higher data density than Blu-Ray. Faster read and write speeds. Higher ceiling for max data storage capability. Increasing resolutions for TVs will require more storage for movies and games.
- 16. Benefits of HDS ▪ Three-dimensional data storage will be able to store more information in a smaller space and offer faster data transfer times. ▪ Unlike other technologies that record one data bit at a time, holography records and reads more than a million bits of data with a single flash of light. ▪ This enables significantly higher transfer rates than current optical storage devices. ▪ High storage densities and fast transfer rates, combined with durable, reliable , low-cost media, mean that holography is poised to become a compelling choice for next-generation storage.
- 17. Drawbacks of HDS ▪ Not a guaranteed market leader: If another technology becomes the industry standard then read/write equipment will be hard to find ▪ Expensive development: Existing technology is becoming better and cheaper It is difficult to market a product that is more expensive per GB of storage.
- 18. COMPARISION OF STORAGE DISCS: Blu-ray HD-DVD HVD Initial cost for recordable disc `800 approx. `400 approx. `5000 approx. Initial cost for recorder/ player `90,000 approx. `90,000 approx. `1,30,000 approx. Initial storage capacity 54GB 30GB 300GB Read/Write speed 36.5 mbps 63.5 mbps 1 gbps
- 19. Market Players ▪ InPhase Technologies: Introduced the world's first commercial holographic drive and media(Tapestry 300r). ▪ General Electric: In the process of developing a new holographic optical storage disc, which would support up to 500GB of data. ▪ Optware: Holographic Versatile Card developed by Optware .
- 20. Potential Competitors… ▪ Similar technologies that may end up in a "format war" -UV or X ray discs: Utilizing a laser with a smaller wavelength allows for greater storage. -3D optical discs: Stores data in three dimensions for greater data density.
- 21. Conclusion… In conclusion, Holographic Storage has the advantage over other storage mediums as it relates to: -Storage Capacity -Transfer Rate -Backup Its main disadvantage is its cost of ownership. Keep in mind, when Blu-ray was Introduced in 2006, a 25- gigabyte disc cost nearly $1 a gigabyte. Its about half the cost now. Overtime, the overall cost of holographic data storage should decrease to an acceptable amount.
- 22. References… ▪ www.ibm.com. ▪ http://www.riedelit.com/Data_Recovery_Technical_Guide.html ▪ http://www.usbyte.com/common/optical_data_storage_systems.html ▪ www.howstuffworks.com/ ▪ www.mediastoragedevices.com/holographic-versatile-disc.html ▪ Kevin Kurtis from Iphase technologies. ▪ http://www.answers.com/topic/holographic-versatile-disc ▪ http://www.hvd-forum.org/abouthvd/technology.html
- 23. THANK YOU…