Fibre
Termination
Fibre Termination Methods
This
section is intended to introduce the various methods which exist for the
termination of fibre optic cables. At Ramick Computing, each field Fibre
Engineer is capable of the actual practical aspects of carrying out the
termination using each of the different methods (such as Direct
Termination and Fusion Splicing).
Fibre to fibre
interconnection can consist of a splice (permanent connection) or a
connector which differs from the splice in its ability to be disconnected
and reconnected. Fibre optic connector types are as various as the
applications for which they were developed. Different connector types have
different characteristics, different advantages and disadvantages, and
different performance parameters. But all connector have the same four
basic components:
The Ferrule:
The
fibre is mounted in a long, thin cylinder, the ferrule, which acts as a
fibre alignment mechanism. The ferrule is bored through the centre at a
diameter that is slightly larger than the diameter of the fibre cladding.
The end of the fibre is located at the end of the ferrule. Ferrules are
typically made of metal or ceramic, but they may also be constructed of
plastic.
The
Connector Body:
Also
called the connector housing, the connector body holds the ferrule. It is
usually constructed of metal or plastic and includes one or more assembled
pieces which hold the fibre in place. The details of these connector body
assemblies vary among connectors, but bonding and/or crimping is commonly
used to attach strength members and cable jackets to the connector body.
The ferrule extends past the connector body to slip into the coupling
device.
The Cable:
The
cable is attached to the connector body. It acts as the point of entry for
the fibre. Typically, a strain-relief boot is added over the junction
between the cable and the connector body, providing extra strength to the
junction.
The Coupling
Device:
Most
fibre optic connectors do not use the male-female configuration common to
electronic connectors. Instead, a coupling device such as an alignment
sleeve is used to mate the connectors. Similar devices may be installed in
fibre optic transmitters and receivers to allow these devices to be mated
via a connector. These devices are also known as feed-through bulkhead
adapters.
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