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HIGH DENSITY HOLOGRAPHDATA STORAGE

NAMES : Shaik Shabre Yaseen (roll no. 12781A04D5)

Y . Via!a"#r$a ( roll no. 12781A04%&)

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INTRODUCTIONHow holographic data storage wors!!"

The co#pelli$g %eat&res o% 'ole holograph()rapid tra$s%er rate a$d &ltrahigh storage!

De$sities ) arise %ro# two *asic properties +

,i- The writi$g a$d readi$g o% *its o% data occ&r i$ a parallel ) pagewise %ashio$ ) &$lie the serial read.write!

,ii- The three di#e$sio$al $at&re holograph( e$a*les the storage o%#a$( o% this pages o% data withi$ the sa#e 'ole o% recordi$g#edi ) there*( e$a*li$g %or *e(o$d the di/ractio$ li#it o%co$'e$tio$al optical tech$ologies !

PROPERTIES

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0OR1INGThe holographic storage ) light %ro# a cohere$t laser

so&rce is split i$to two *ea#s +

,i- Sig$al *ea#

,ii- Re%ere$ce *ea#

This two li$es are spatiall( o'erlapped thro&gh the 'oleo% a photose$siti'e storage

#edi prod&ci$g a$ optical i$ter%ere$ce patter$ that is i#aged

withi$ the #edi

The optical i$ter%ere$ce patter$ t(picall( i$d&ces #od&latio$i$ the re%racti'e i$de2 o% the

recordi$g #aterial (ieldi$g di/racti'e 'ole grati$gs!

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NEED O3 OPTICAL HOLOGRAPHY

,i- The de#a$d %or i$creasi$g i$ the capacit( a$d data storage tests the li#its o% co$'tech$ologies a$d dri'es the search %or $ew approache

,ii- Optical holograph( has lo$g held the pro#ise o%de$sities a$d data tra$s%er rates %or greater tha$

traditio$al #ag$etic a$d optical s(ste#s !

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The compelling features of volume holography,

rapid transfer rates and ultrahigh storage

densities, arise from two basic properties the

writing and reading of bits of data occur

in a parallel, page-wise fashion, unlike the serial

read-write processes of most storage

technologies

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OUTLOO1 3OR HOLOGRAPHIC DATA

The rece$t co##ercial a'aila*ilit( o% optical co#po$e$ts s&chspatial light #od&lators ) C4OS detectors a$d co#pact 'isi*le

wa'ele$gth lasers has re#o'ed #a$( o% the o*stacles that prepre'e$ted the practical co$sideratio$ o% holographic data stora

This ad'a$ces i$ #edia ) recordi$g #ethods a$d the de$5 67 cha$$els G*its8i$9 ) %&rther e$ha$ce the prospects %holograph( to *eco#e a reali:a*le ge$eratio$ storage te!

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Co$cl&sio$+. He$ce high de$sit( holographic data storage

widel( &sed *eca&se o% its &$i;&e characteristics lie

high storage) high sec&rit() *ac&p) 6D graphics) rap

tra$s%er rates) pro#ises storage de$sities greater

traditio$al #ag$etic a$d optical s(ste#s! I$ %&t&re th

tech$olog( ca$ *e i#pro'ed *( &si$g CNN

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