Holographic Optical Data Storage (HODS) or 
      Holographic Data Storage System (HDDS)
       – The Revolutionary data storage technology
       – Uses images (holograms) rather than bits to store data
       – Images imposed in material
       – Uses a combination of Lasers & Optical materials to 
         achieve this . 
       – This is a Volumetric approach.
                              
    
     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.
    
     The advent of Semiconductor & magnetic memories stalled its 
    research for much time but it is now picking up momentum.
                           
            Why Do We Need This?
     “For Internet applications alone, industry estimates are that 
       storage needs are doubling every 100 days”
           -Nelson Diaz, Lucent Technologies
     “Optoelectronics Industry and Technology Development 
       Association projects that by the year 2010, a storage system 
       serving an average LAN will need … 10 TB and a WAN 
       server will  require 100 TB to 1 petabyte …of storage”
                - Red Herring
                                   
          Overview of  HODS
                           
                           
                 The Practical Setup