<s>
Holographic	B-Algorithm
Data	I-Algorithm
Storage	I-Algorithm
System	I-Algorithm
(	O
HDSS	B-Algorithm
)	O
program	O
was	O
a	O
US	O
Federal	O
government-funded	O
consortium	B-Application
on	O
holographic	B-Algorithm
data	I-Algorithm
storage	I-Algorithm
by	O
Teledyne	O
Technologies	O
,	O
IBM	O
and	O
Stanford	O
University	O
,	O
created	O
in	O
1995	O
.	O
</s>
<s>
The	O
holographic	B-Algorithm
data	I-Algorithm
storage	I-Algorithm
system	I-Algorithm
was	O
created	O
with	O
the	O
initial	O
goals	O
of	O
developing	O
several	O
key	O
components	O
for	O
the	O
system	O
,	O
including	O
a	O
high-capacity	O
,	O
high-bandwidth	O
spatial	O
light	O
modulator	O
used	O
for	O
data	B-General_Concept
input	I-General_Concept
;	O
optimized	O
sensor	B-Algorithm
arrays	I-Algorithm
for	O
data	O
output	O
;	O
and	O
a	O
high-power	O
red	O
semiconductor	O
Laser	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
the	O
HDSS	B-Algorithm
researchers	O
were	O
to	O
explore	O
issues	O
relating	O
to	O
the	O
optical	O
systems	O
architecture	O
(	O
such	O
as	O
multiplexing	B-Architecture
schemes	O
and	O
access	O
modes	O
)	O
,	O
data	B-Algorithm
encoding	I-Algorithm
and	O
decoding	O
methods	O
,	O
signal	O
processing	O
techniques	O
,	O
and	O
the	O
requirements	O
of	O
target	O
applications	O
.	O
</s>
<s>
Into	O
the	O
program	O
's	O
final	O
year	O
,	O
progress	O
has	O
been	O
such	O
that	O
consortium	B-Application
member	O
,	O
IBM	O
Research	O
Division	O
,	O
believed	O
that	O
holograms	B-Algorithm
could	O
hold	O
the	O
key	O
to	O
high-capacity	O
data	O
storage	O
in	O
the	O
next	O
millennium	O
.	O
</s>
<s>
Large	O
amounts	O
of	O
data	O
can	O
be	O
stored	O
holographically	O
because	O
lasers	O
are	O
able	O
to	O
store	O
pages	O
of	O
electronic	O
patterns	O
holographic	B-Algorithm
storage	I-Algorithm
–	O
sometimes	O
referred	O
to	O
as	O
3D	O
storage	O
within	O
special	O
optical	O
materials	O
as	O
opposed	O
to	O
just	O
on	O
the	O
surface	O
.	O
</s>
<s>
In	O
traditional	O
holography	B-Algorithm
,	O
each	O
viewing	O
angle	O
gives	O
a	O
different	O
aspect	O
of	O
the	O
same	O
object	O
.	O
</s>
<s>
With	O
holographic	B-Algorithm
storage	I-Algorithm
,	O
however	O
,	O
a	O
different	O
'	O
page	O
 '	O
of	O
information	O
is	O
accessed	O
.	O
</s>
<s>
Holographic	B-Algorithm
storage	I-Algorithm
uses	O
two	O
laser	O
beams	O
,	O
a	O
reference	O
and	O
a	O
data	O
beam	O
to	O
create	O
an	O
interference	O
pattern	O
at	O
a	O
medium	O
where	O
the	O
two	O
beams	O
intersect	O
.	O
</s>
<s>
The	O
key	O
to	O
making	O
the	O
holographic	B-Algorithm
data	I-Algorithm
storage	I-Algorithm
system	I-Algorithm
work	O
is	O
the	O
second	O
laser	O
beam	O
which	O
is	O
fired	O
at	O
the	O
crystal	O
to	O
retrieve	O
a	O
page	O
of	O
data	O
.	O
</s>
<s>
Holography	B-Algorithm
is	O
expected	O
to	O
be	O
of	O
value	O
in	O
archival	B-Application
or	O
library	O
storage	O
applications	O
where	O
large	O
quantities	O
of	O
data	O
are	O
required	O
to	O
be	O
retained	O
at	O
the	O
lowest	O
costs	O
possible	O
.	O
</s>
<s>
Since	O
it	O
involves	O
no	O
moving	O
parts	O
,	O
holographic	B-Algorithm
data	I-Algorithm
storage	I-Algorithm
will	O
be	O
more	O
reliable	O
than	O
existing	O
hard	B-Device
disk	I-Device
technologies	O
.	O
</s>
<s>
The	O
major	O
challenge	O
ahead	O
is	O
expected	O
to	O
be	O
the	O
development	O
of	O
a	O
rewritable	O
form	O
of	O
holographic	B-Algorithm
storage	I-Algorithm
.	O
</s>
<s>
During	O
CES	O
2006	O
,	O
a	O
workable	O
holographic	B-Algorithm
drive	O
was	O
tested	O
and	O
stored	O
300	O
GB	O
of	O
memory	O
compared	O
to	O
Blu-ray	O
'	O
s	O
100	O
GB	O
.	O
</s>
<s>
It	O
has	O
been	O
announced	O
that	O
hologram	B-Algorithm
disks	O
will	O
be	O
a	O
post-Blu-ray	O
storage	O
device	O
.	O
</s>
