Connector Replacement Along The Link; Link Concatenation - Cailabs AROONA-STAR Manuel D'instruction

C. Connectors replacement along the link
The multimode link to be upgraded may be a concatenation of
several fiber sections with intermediate optical patch cords in
network bays. These intermediate connection points indicate
the presence of optical connectors.
Optical connectors show eccentricity tolerance of a few
micrometers which may affect optimal optical fiber core
alignment decreasing AROONA-STAR
efficiency. To insure optimal mode selection and thus
maximal transmission performances these connectors
must be removed and replaced by fusion splice connections.
BEFORE
D. Link concatenation
It is possible to fusion splice different type of multimode fibers
(OM1/OM2/OM3/OM4/OM5) to create a link. The optical modes
travelling through these fibers are identical therefore modal
selection is possible even though optical core are of different
sizes (62.5 µm or 50 µm).
Regardless of whether or not the fibers are of the same type
(OM1/2/3/4/5), use an "MMF Auto" splicing program with
clad to clad alignment.
An OTDR (Optical Time-Domain Reflectometer) measurement,
also called reflectometry measurement, of the link to upgrade
can help to identify all intermediate connectors.
To replace a connector by a fusion splice connection cut the
fiber as close of the connector as possible and follow the fusion
splice procedure.
mode selection
NB: Linking several existing multimode fiber sections
together may require the use of a multimode fiber extension.
Connector replacement
by fusion splicing
AFTER
NB: Regardless of the program used the optical fusion
splicer may display a "bubble in fiber" error even though the
splice is of good quality. This often happens when splicing
two fibers of different types.
15