Presented By:
Manu G.R

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HOLOGRAPHIC DATA STORAGE
INTRODUCTION
The storage of information and data has been an important issue since men first drew pictures on the walls of caves. The methods of storing data have changed over the years, especially now that we have CD, DVD, HDD.
Scientist Pieter J. van Heerden first proposed the idea of holographic (three-dimensional) storage in the early 1960s.
Holographic memory is developing technology that has promised to revolutionalise the storage systems.
Holographic data storage is a volumetric approach.
What Is Holographic Storage? 
·     Holographic storage is the computer storage that uses laser beams to store data in 3 dimensions.
·     Holographic Storage is an optical technology that allows 1 million bits of data to be written or read in a single flash of light.
·     Holography records through the full depth of the medium.
·     Holography enables transfer rates significantly higher than current optical storage devices.
Why Holographic Storage?
·    Three dimensional data storage has the potential to store more data in a smaller space and at a quicker speed.
·    Parallel access to data i.e. Multiplex data pages in one location.
·    Fast data transfer rates.
·    Competitive with other optical technology.
·    Thousands of holograms can be stored in the same location throughout the entire depth of the medium.
What Is A Hologram?
A three-dimensional image formed by the interference of light beams from a laser.
The intersection of two beams creates an interference pattern of bright and dark regions.
COMPONENTS OF A HOLOGRAPHIC STORAGE SYSTEM
Blue-green argon laser
Beam splitters
Mirrors
LCD panel (SLM)
Lenses
Lithium-niobate crystal or photopolymer
Charge-coupled device (CCD) camera
How a holographic memory works
ADVANTAGES
Entire page of data can be retrieved quickly and at one time.
Offers storage of 1TB of data in a sugar cube sized crystal.
It offers high density storage.
Low Scatter: Low levels of noise in data recovery
It transfer rate is so high that a person can easily load the required data.
Resistance to damage – If some parts medium are damaged, all information can still be obtained from other parts.
Efficient retrieval – All information can be retrieved from any part of the medium
APPLICATIONS
CONCLUSION
Holographic data storage is a convenient and effective way of data storage.
This storage technique is rapidly gaining attention because of its capacity (GB to TB) and high speed data storage.
Holographic data storage will help to create a new tapeless era in the video production and broadcast industry.
No other storage technology under development can match holography's capacity and speed potential.
Finally, Holography could provide a unique hardware device for searching databases rapidly.