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HOLOGRAPHIC DATA HOLOGRAPHIC DATA STORAGE STORAGE (3D optical data storage) (3D optical data storage) Presentation By: SANCHIT GAUTAM The Future in Data Storage
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3 d optical data storage

May 20, 2015

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Page 1: 3 d optical data storage

HOLOGRAPHIC DATA HOLOGRAPHIC DATA STORAGESTORAGE

(3D optical data storage)(3D optical data storage)

Presentation By:SANCHIT GAUTAM

The Future in Data Storage

Page 2: 3 d optical data storage

~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.

Page 3: 3 d optical data storage

~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.

Page 4: 3 d optical data storage

~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.

Page 5: 3 d optical data storage

~OVERVIEW~~OVERVIEW~

Page 6: 3 d optical data storage

~THE PRACTICAL SETUP~~THE PRACTICAL SETUP~

Page 7: 3 d optical data storage

What isWhat is SLM 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.

Page 8: 3 d optical data storage

~About ~About Lithium Niobate Lithium Niobate Crystal~Crystal~

Chemical Formula- LiNbO3.

It has high photorefractive sensitivity &

stability.

It has trigonal structure.

Molecular weight - 147.9.

Band gap - 4eV

Page 9: 3 d optical data storage

What is What 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.

Page 10: 3 d optical data storage

~RECORDING DATA~

Page 11: 3 d optical data storage

~READING DATA~~READING DATA~

Page 12: 3 d optical data storage

~HOLOGRAPHIC VERSATILE DISK~~HOLOGRAPHIC VERSATILE DISK~

Currently, Inphase Technologies is working on HVD.

Capacity : 6 TerabyteAccess Speed : 10 Gb/secWriting speed: 300 Kb/sec

Page 13: 3 d optical data storage

~COMPARISION~~COMPARISION~

Page 14: 3 d optical data storage

~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.

Page 15: 3 d optical data storage

~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.

Page 16: 3 d optical data storage

~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.

Page 17: 3 d optical data storage

~CONCLUSION~~CONCLUSION~

Holographic Data Storage is a convenient , effective and secure way of data storage.

Page 18: 3 d optical data storage

~REFERENCES~~REFERENCES~http://en.wikipedia.org/wiki/Holographic_d

ata_storagehttp://www.imation.com/about/news/

newsitem/0%2C1233%2C298%2C00.htmlhttp://www.pitt.edu/~drew1/2089/

holo.htmhttp://www.sciam.com/2000/0500issue/05

00toigbox5.htmlhttp://en.wikipedia.org/wiki/3d Optical

Data StorageBell Laboratories Physical Sciences

Research,

Page 19: 3 d optical data storage

Thank you for listening to my presentation!

The future is here