Download - 3d Memory Storage S.anjaNEYULU
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To increase data storage capacity by using
the space within the crystal that is been used
in 1-D and 2-D storage device.
To get less susceptible to hacking,data theftproblem and data loss due to external strain.
Speed retrieval,transfer and search of data.
Accurate reference of required address
within a crystal with page of information.
To avoid multiple read/write head complexity.
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The process for encoding data onto the signalbeam is accomplished by a device called a
spatial light modulator (SLM).
The SLM translate the electronics data of 0sand 1s into an optical checkerboard pattern of
light and dark pixels.
Light from a single laser beam is split into two
beams, the signal which carries the data and thereference beam.
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At the point of intersection of the reference
beam and the data carrying signal beam, the
hologram is recorded in the storage medium.
A chemical reaction occur in the medium on
intersection of both beam cause hologramstored.
By varying the reference beam angle,
wavelength, or media position many different
holograms can be recorded in the same
volume of material.
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HOWITWORKS?
First there is an urgent need of translating
electronic code of 0s and 1s to light beam
of light and dark pixel pattern.
So the above work is done through SLM
and storage medium.
Here the intersection of both light beam
from SLM on crystal cause to form
holograms into the bulk of the crystal.
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3-D Disk Drive Mechanism
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Storing of information within the volume of
storage material is done through multi-layer
storage technique.
In this technique the data are stored into the
bulk of the material in hologram using only one
read/write head in SLM.
Here the information is arranged in array ofholograms.
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Read/Write Head
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To read or write any data here only one
head is enough.
The head here is nothing but the two beam
of SLM that does the whole work.
We write into the bulk of material in multi-
layer by changing the angle ,wavelength
position of the beam.
While reading we use only one beam which
incident on required hologram projected onto
a detector that reads the data in parallel.
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Performance and AdvantagesMaximum data storage limits we have reached today
15.9G.B on a double-layer, doubled sided DVD.180 GB onhard disk.
Whereas this system that can store about a terabyte ofinformation (thats over 15,000 CDs!) on the crystal the size
of a sugar cube!
The multi-layer system is optically transparent andhomogeneous .
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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.
This enables transfer rate significantly higher than
current optical storage devices.
Performance and Advantages
(Continues)
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This will offer symmetrical infinite double sided disc toread and writes for the retention of data storage for ten-
years or more with drive densities of
200terabits/sq.in.and up.
This will allow the holographic optical nanotechnologydrive to hold more data than any type of drive and
delivered data much faster.The patents on a semiconductor read/write head for
device raise data storage densities by a factor of 100 or
more and will add at least 1000 times the data storage
capacity per peripheral storage footprint and data
transfer rates over 100 G bits/sec.
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