<s>
In	O
fiber	B-Architecture
optic	I-Architecture
technology	I-Architecture
,	O
a	O
reference	B-Device
surface	I-Device
is	O
that	O
surface	O
of	O
an	O
optical	B-Architecture
fiber	I-Architecture
that	O
is	O
used	O
to	O
contact	O
the	O
transverse-alignment	O
elements	O
of	O
a	O
component	O
such	O
as	O
a	O
connector	B-Protocol
or	O
mechanical	B-Device
splice	I-Device
.	O
</s>
<s>
For	O
telecommunications-grade	O
fibers	O
,	O
the	O
reference	B-Device
surface	I-Device
is	O
the	O
outer	O
surface	O
of	O
the	O
cladding	B-Device
.	O
</s>
<s>
For	O
plastic-clad	O
silica	O
(	O
PCS	O
)	O
fibers	O
,	O
which	O
have	O
a	O
strippable	O
polymer	O
cladding	B-Device
(	O
not	O
to	O
be	O
confused	O
with	O
the	O
polymer	O
overcoat	O
of	O
an	O
all-silica	B-Device
fiber	I-Device
)	O
,	O
the	O
reference	B-Device
surface	I-Device
may	O
be	O
the	O
core	O
.	O
</s>
