3-d holographic data storage

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3-d holographic data storage

  1. 1. TECHNICAL SEMINAR "3-D HOLOGRAPIC DATA STORAGE" DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING Submitted by S MANJUNATHA CHARI USN-1CK09EC017 UNDER THE GUIDANCE OF Prof.SUJANI.G H O D DEPT. OF ECE, CBIT KOLAR DEPT OF ECE, CBIT KOLAR 1 THANKS TO MY PARENTS AND FRIENDS FOR THEIR SUPPORT.
  2. 2. The Future in Data Storage DEPT OF ECE, CBIT KOLAR 2
  3. 3. 3 1725- Punch Cards 1946- Selectron Tube 1951- Magnetic Tape 1956-Hard Disk 1971-Floppy 1985-CD ROM 1971 – Compact Cassette 1982- CD 1994- ZIP DRIVE 1995- JAZZ DRIVE & DVD 1998- FLASH DRIVE 2006- BLUE RAY DISC 2010- HVD ~ EVOLUTION IN DATA STORAGE ~
  4. 4. ~INTRODUCTION~ • Hologram is a 3D image reproduced from a pattern of interference. • Several Terabyte level mass storage . • Uses a combination of laser and optical material to achieve this. • 3D optical data storage is related to holographic data storage. DEPT OF ECE, CBIT KOLAR 4
  5. 5. ~The Beginning~ • Pieter J. van Heerden first proposed the idea of holographic (three-dimensional) storage in the early 1960s. • A decade later, scientists at RCA Laboratories demonstrated the technology by recording 500 holograms in an iron- doped lithium-niobate crystal. DEPT OF ECE, CBIT KOLAR 5
  6. 6. ~WHY DO WE NEED THIS?~ • To increase data storage capacity by using the space within the crystal that is been used in 1-D and 2-D storage device. • Speed retrieval, transfer and search of data. • To avoid multiple read/write head complexity. DEPT OF ECE, CBIT KOLAR 6
  7. 7. ~OVERVIEW~ DEPT OF ECE, CBIT KOLAR 7
  8. 8. ~THE PRACTICAL SETUP~ DEPT OF ECE, CBIT KOLAR 8
  9. 9. DEPT OF ECE, CBIT KOLAR 9
  10. 10. What is SLM ? • SLM- Spatial light modulator. • SLM consists 1-D or 2-D arrays of light modulating elements. • SLM converts the digital data 1’s or 0’s into a 2-D array of bright & dark spots. • SLM is used to imprint the data on the object beam. DEPT OF ECE, CBIT KOLAR 10
  11. 11. ~About Lithium Niobate Crystal~ • Chemical Formula- LiNbO3. • It has high photorefractive sensitivity & stability. • It has trigonal structure. • Molecular weight - 147.9 • Band gap - 4eV DEPT OF ECE, CBIT KOLAR 11
  12. 12. What is CCD ? • CCD - Charge Coupled Device. • Its structure was proposed in 1969 by Boyle & Smith. • CCD is a light sensitive device. • CCD converts pixels in images into electric charge. • CCD contains a separate value for each color. DEPT OF ECE, CBIT KOLAR 12
  13. 13. ~RECORDING DATA~ DEPT OF ECE, CBIT KOLAR 13 CCD
  14. 14. ~READING DATA~ DEPT OF ECE, CBIT KOLAR 14
  15. 15. ~HOLOGRAPHIC VERSATILE DISK~ • Currently, In phase Technologies is working on HVD. Capacity : 4 - 6 Terabyte Access Speed : 10 Gb/sec Writing speed: 1 Gb/sec DEPT OF ECE, CBIT KOLAR 15
  16. 16. ~ Holographic Versatile Disc structure ~ 1.Green writing/reading laser (532 nm) 2.Red positioning/addressing laser (650 nm) 3.Hologram (data) 4.Poly-carbon layer 5.Photo polymeric layer (data- containing layer) 6.Distance layers 7.Dichroic layer (reflecting green light) 8.Aluminum reflective layer (reflecting red light) 9.Transparent base DEPT OF ECE, CBIT KOLAR 16
  17. 17. DEPT OF ECE, CBIT KOLAR 17
  18. 18. DEPT OF ECE, CBIT KOLAR 18
  19. 19. DEPT OF ECE, CBIT KOLAR 19
  20. 20. ~COMPARISION~ DEPT OF ECE, CBIT KOLAR 20
  21. 21. DEPT OF ECE, CBIT KOLAR 21 ~ Capacity, Speed, Cost Comparison ~
  22. 22. ~COMPARISION~ DEPT OF ECE, CBIT KOLAR 22
  23. 23. ~INTERESTING FACTS~ • It has been estimated that all the books in the U.S. Library of Congress, could be stored on six (6) HVD's. • The pictures of every landmass on Earth (Google Earth for example) can be stored on two (2) HVD's. • With MPEG4 ASP encoding, a HVD can hold between 4,600 to 11,900 hours of video, which is enough for non-stop playing for a year. DEPT OF ECE, CBIT KOLAR 23
  24. 24. ~PERFORMANCE & ADVANTAGES~ • The multi-layer system is optically transparent and homogeneous . • Unlike other technologies that record one data bit at a time, holography allows a million bits data to be written and read in parallel with single flash of light. • It allows 1 million bits of data to be written or read in a single flash of light through SLM. DEPT OF ECE, CBIT KOLAR 24
  25. 25. ~CHALLENGES~ • No suitable recording media existed. SOLUTION: Tapestry, a high-performance, proprietary material with proven high-density storage capabilities, was invented by In Phase Technologies. DEPT OF ECE, CBIT KOLAR 25
  26. 26. ~CHALLENGES~ • Lasers were costly and unreliable. SOLUTION DVD recording technologies require the availability of high-quality, price-competitive lasers. In Phase Technologies takes advantage of available red and blue lasers which are used in other high-volume products. DEPT OF ECE, CBIT KOLAR 26
  27. 27. ~ STILL EXISTING CHALLENGES~ • If too many pages are stored in one crystal, the strength of each hologram is diminished. • Align all of the HVD components in a low- cost system. DEPT OF ECE, CBIT KOLAR 27
  28. 28. ~CONCLUSION~ • Holographic Data Storage is a convenient , effective and secure way of data storage. • Holographic memory will most likely be used in next generation super computers where cost is not as much of an issue. DEPT OF ECE, CBIT KOLAR 28
  29. 29. DEPT OF ECE, CBIT KOLAR 29
  30. 30. DEPT OF ECE, CBIT KOLAR 30
  31. 31. Principal: coating a normal DVD with a special light-sensitive protein made from a genetically altered microbe. Storage: 50TB Possibility: 240TB DEPT OF ECE, CBIT KOLAR 31
  32. 32. The future is here DEPT OF ECE, CBIT KOLAR 32

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