<s>
Optical	O
network-on-chip	B-Architecture
(	O
ONoC	O
)	O
is	O
a	O
new	O
type	O
of	O
network	B-Architecture
on	I-Architecture
chip	I-Architecture
(	O
NoC	B-Architecture
)	O
for	O
multiprocessor	B-General_Concept
system-on-chip	I-General_Concept
.	O
</s>
<s>
While	O
traditional	O
NoC	B-Architecture
relies	O
on	O
electrical	O
signals	O
to	O
transfer	O
information	O
,	O
hence	O
called	O
electrical	O
network-on-chip	B-Architecture
(	O
ENoC	O
)	O
,	O
its	O
performance	O
and	O
energy	O
efficiency	O
are	O
bound	O
by	O
the	O
significantly	O
unbalanced	O
scaling	O
of	O
on-chip	O
global	O
metal	O
wires	O
comparing	O
to	O
transistors	O
.	O
</s>
