<s>
In	O
fiber	B-Architecture
optics	I-Architecture
,	O
mode	B-Device
volume	I-Device
is	O
the	O
number	O
of	O
bound	O
modes	O
that	O
an	O
optical	B-Architecture
fiber	I-Architecture
is	O
capable	O
of	O
supporting	O
.	O
</s>
<s>
The	O
mode	B-Device
volume	I-Device
M	O
is	O
approximately	O
given	O
by	O
and	O
,	O
respectively	O
for	O
step-index	B-Device
and	O
power-law	B-Device
index	I-Device
profile	I-Device
fibers	O
,	O
where	O
g	O
is	O
the	O
profile	O
parameter	O
,	O
and	O
V	O
is	O
the	O
normalized	B-Device
frequency	I-Device
,	O
which	O
must	O
be	O
greater	O
than	O
5	O
for	O
this	O
approximation	O
to	O
be	O
valid	O
.	O
</s>
