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TECHNICAL SEMINAR
ON
"3-D HOLOGRAPIC DATA STORAGE"
DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING
Submitted byS MANJUNATHA CHARIUSN-1CK09EC017
UNDER THE GUIDANCE OFProf.SUJANI.GH O DDEPT. OF ECE, CBIT KOLAR
C.BYREGOWDA INSTITUTE OF TECHNOLOGYT h o r a d e v a n d a H a l l i [ p ] , K o l a r t o S r i n i v a s p u r R o a d , K O L A R – 5 6 3 1 0 1
DEPT OF ECE, CBIT KOLAR 1THANKS TO MY PARENTS AND FRIENDS FOR THEIR SUPPORT.
The Future in Data Storage
DEPT OF ECE, CBIT KOLAR 2
HOLOGRAPHIC DATA STORAGE(3D optical data storage)
3
1725- Punch Cards
1946-Selectron Tube
1951-Magnetic Tape
1956-Hard Disk
1971-Floppy
1978-Laser Disc
1985-CD ROM
1971 –Compact Cassette
1982- CD
1994- ZIP DRIVE
1995- JAZZ DRIVE & DVD
1998- FLASH DRIVE
2000- SD MEMORY
2006- BLUE RAY DISC
2006-
CLOUD
STORAGE
2010-HVD
~ EVOLUTION IN DATA STORAGE ~
~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
~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
~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
~OVERVIEW~DEPT OF ECE, CBIT KOLAR 7
~THE PRACTICAL SETUP~DEPT OF ECE, CBIT KOLAR 8
DEPT OF ECE, CBIT KOLAR 9
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
~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
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
~RECORDING DATA~
DEPT OF ECE, CBIT KOLAR
13
CCD
~READING DATA~DEPT OF ECE, CBIT KOLAR 14
~HOLOGRAPHIC VERSATILE DISK~
• Currently, In phase Technologies is working on HVD.
Capacity : 4 - 6 TerabyteAccess Speed : 10 Gb/secWriting speed: 1 Gb/sec
DEPT OF ECE, CBIT KOLAR 15
~ Holographic Versatile Disc structure ~
1.Green writing/reading laser (532 nm)
2.Red positioning/addressing laser (650 nm)
3.Hologram (data)4.Poly-carbon layer5.Photo polymeric layer
(data- containing layer)
6.Distance layers7.Dichroic layer (reflecting
green light)8.Aluminum reflective layer
(reflecting red light)9.Transparent base
DEPT OF ECE, CBIT KOLAR 16
DEPT OF ECE, CBIT KOLAR 17
DEPT OF ECE, CBIT KOLAR 18
DEPT OF ECE, CBIT KOLAR 19
~COMPARISION~
DEPT OF ECE, CBIT KOLAR 20
DEPT OF ECE, CBIT KOLAR 21
~ Capacity, Speed, Cost Comparison ~
~COMPARISION~~COMPARISION~DEPT OF ECE, CBIT KOLAR 22
~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
~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
~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
~CHALLENGES~
• Lasers were costly and unreliable.
SOLUTIONDVD 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
~ 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
~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
DEPT OF ECE, CBIT KOLAR 29
QU
IRE
S-?
DEPT OF ECE, CBIT KOLAR 30
Technology has no Limit
Principal: coating a normal DVD with a special light-sensitive protein made from a genetically altered microbe.Storage: 50TBPossibility: 240TB
DEPT OF ECE, CBIT KOLAR 31
PROTEIN-COATED DISC
The future is here
Thank you for listening to my presentation!
DEPT OF ECE, CBIT KOLAR 32