Holographic data storage uses lasers and optical materials to store massive amounts of data in three dimensions. Pieter van Heerden first proposed the idea in the 1960s, and a decade later scientists demonstrated storing 500 holograms in a lithium niobate crystal. Holographic data storage offers significant advantages over traditional storage methods by storing data in all three dimensions within a crystal, allowing millions of bits to be written or read in parallel with a single flash of light. Current research aims to develop holographic versatile disks with terabyte storage capacities and fast data transfer rates.

1. HOLOGRAPHIC DATAHOLOGRAPHIC DATA
STORAGESTORAGE
(3D optical data storage)(3D optical data storage)
Presentation By:
SANCHIT GAUTAM
The Future in Data Storage

2. ~INTRODUCTION~~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.

3. ~The Beginning~~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.

4. ~WHY DO WE NEED THIS?~~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.

5. ~OVERVIEW~~OVERVIEW~

6. ~THE PRACTICAL SETUP~~THE PRACTICAL SETUP~

7. What isWhat is SLMSLM ??
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.

8. ~About~About Lithium NiobateLithium Niobate Crystal~Crystal~
Chemical Formula- LiNbO3.
It has high photorefractive sensitivity & stability.
It has trigonal structure.
Molecular weight - 147.9.
Band gap - 4eV

9. What isWhat is CCDCCD ??
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 colour.

10. ~RECORDING DATA~

11. ~READING DATA~~READING DATA~

12. ~HOLOGRAPHIC VERSATILE DISK~~HOLOGRAPHIC VERSATILE DISK~
Currently, Inphase Technologies is working on HVD.
Capacity : 6 Terabyte
Access Speed : 10 Gb/sec
Writing speed: 300 Kb/sec

13. ~COMPARISION~~COMPARISION~

14. ~INTERESTING FACTS~~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.

15. ~PERFORMANCE & ADVANTAGES~~PERFORMANCE & ADVANTAGES~
The multi-layer system is optically transparent and
homogeneous .
Unlike other technologies that record one databit
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.

16. ~CHALLENGES~~CHALLENGES~
Lasers were costly and unreliable.
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.

17. ~CONCLUSION~~CONCLUSION~
Holographic Data Storage is a convenient ,
effective and secure way of data storage.

18. ~REFERENCES~~REFERENCES~
http://en.wikipedia.org/wiki/Holographic_data_storage
http://www.imation.com/about/news/newsitem/0%
2C1233%2C298%2C00.html
http://www.pitt.edu/~drew1/2089/holo.htm
http://www.sciam.com/2000/0500issue/0500toigbox5.h
http://en.wikipedia.org/wiki/3d Optical Data
Storage
Bell Laboratories Physical Sciences Research,

19. Thank you for listening to
my presentation!
The future is here