<s>
In	O
an	O
optical	B-Architecture
fiber	I-Architecture
,	O
the	O
material	B-Device
dispersion	I-Device
coefficient	I-Device
,	O
M(λ )	O
,	O
characterizes	O
the	O
amount	O
of	O
pulse	O
broadening	O
by	O
material	O
dispersion	O
per	O
unit	O
length	O
of	O
fiber	O
and	O
per	O
unit	O
of	O
spectral	O
width	O
.	O
</s>
<s>
For	O
many	O
optical	B-Architecture
fiber	I-Architecture
materials	O
,	O
M(λ )	O
approaches	O
zero	O
at	O
a	O
specific	O
wavelength	O
λ0	O
between	O
1.3	O
and	O
1.5	O
μm	O
.	O
</s>
<s>
Pulse	O
broadening	O
caused	O
by	O
material	O
dispersion	O
in	O
a	O
unit	O
length	O
of	O
optical	B-Architecture
fiber	I-Architecture
is	O
given	O
by	O
the	O
product	O
of	O
M(λ )	O
and	O
spectral	O
width	O
( Δλ	O
)	O
.	O
</s>
