Holographic Data Storage

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CERTIFICATE OF APPROVAL

This is to certify that the Seminar titled
HOLOGRAPHIC DATA STORAGE
Submitted by
Nikhil Puthran 100942
Rahulsing Rajput 100944
Pravish Shetty 100954
Suraj Yadav 100962

In partial fulfillment of requirement for the term work of third year in Computer engineering is approved.

EXTERNAL EXAMINERINTERNAL EXAMINER

_____________________________________

HEAD OF THE DEPARTMENTINTERNAL GUIDE

________________________________________

PRINCIPAL

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COLLEGE SEALDATE

A SEMINAR REPORT ON
“HOLOGRAPHIC DATA STORAGE”
SUBMITTED IN PARTIAL FULFILLMENT OF REQUIREMENT
FOR THE TERMWORK OF THIRD YEAR
IN
COMPUTER ENGINEERING
BY
NIKHIL PUTHRAN 100942
RAHULSING RAJPUT 100944
PRAVISH SHETTY 100954
SURAJ YADAV 100962

UNDER THE GUIDANCE OF
Mrs. P B Vijayalakshmi

DEPARTMENT OF COMPUTER ENGINEERING
Fr. CONCEICAO RODRIGUES INSTITUTE OF TECHNOLOGY
SECTOR 9A,VASHI NAVI MUMBAI
2011-2012

ABSTRACT

As computers and the internet become faster and faster, more and more information is transmitted, received, and stored every day. The demand for high density and fast access time data storage is pushing scientists and engineers to explore all possible approaches including magnetic, mechanical, optical, etc. Optical data storage has already demonstrated its potential in the competition against other storage technologies. CD and DVD are showing their advantages in the computer and entertainment market. The motivation for use of optical waves to store and access information is the same as the motivation for optical communication. Light or an optical wave has an enormous capacity (or bandwidth) to carry information because of its short wavelength and parallel nature. In optical storage, there are two types of mechanism, namely localized and holographic memories. The advantage of holographic data storage over localized bit storage is the natural ability to read the stored information in parallel, therefore, meeting the demand for fast access. Conventional memories use surface to store the data, but holographic data storage systems use the volume to store the data. It can store data up to 1Tb in sugar cube sized crystal. Another unique feature that makes the holographic data storage attractive is that it is capable of performing associative recall at an incomparable speed. Therefore, volume holographic memory is particularly suitable for high-density data storage and high-speed pattern recognition.

Index
1. Introduction .......................................................................................................3 2. Literature Survey.....................……………………………………………........5 2.1 Holograms and Volume Holograms..................................................................5 2.2 Storing and Retrieving Data..............................................................................6 2.3 Underlying Technology....................................................................................8 2.4 Storage Material...............................................................................................10 2.5 Multiplexing Technique...................................................................................11 2.6 Errors and Combating Errors...........................................................................12 2.7 Signal processing and Modulation codes........................................................13 2.8 Associative Retrieval………………………………………………………...14 2.9 Detection method for holographic data storage..............................................15 3. Analysis.............................................................................................................17 4. Comparison with other storage devices............................................................18 5....
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