calibrations of the fusion splicer. If this is not done, the splicer will not pro-
vide low-loss splices,” he said.“Connecting a flat polished connector to an
angle polished connector. Permanent damage will occur to the connectors
and the connectors will need to be replaced.
“Correctly installing fiber optic cable requires an entirely different set
of skills than those used for copper cabling,” Foord said.“To install a fiber
optic cable network or fiber segments of a larger system so that it performs to specifications requires skilled, trained technicians.” he said. “A
single improperly made termination can cost the contracting company
thousands of dollars. A fiber cable improperly stripped or an improperly
cleaned fiber end can shut down an entire network. Some industry studies have ranked contaminated connectors and improper polishing of the
ferrule as primary causes of network failure. The key to such failures is
properly trained technicians.”
Methods of Terminating Fiber Optic Cable
• Anaerobic method: Connectors are made using two chemicals: an
adhesive and an accelerator or primer that react rapidly when they
come in contact with each other.
• Crimp-and-cleave method: No epoxy or adhesive is needed; the
optical fiber is clamped within the connector and fiber protruding
from the end-face is cleaved off.
• Epoxy method: Fiber optic connectors are secured to the fiber optic
cable using a two-part epoxy cured in an epoxy oven.
• Fusion splice-on connector method: This prepolished connector has
the optical fiber epoxied onto an optical cable. The opposite end is a
bare fiber stub that is fusion-spliced to the fiber optic connector.
• Preloaded adhesive method: Connectors are preloaded with
an adhesive that must be softened in a special oven. Once the
adhesive is at the correct temperature, the optical fiber is inserted
in the preloaded optic connector and allowed to cool, which
solidifies the adhesive.
• Prepolished method: Special fiber optic connectors have a fiber stub
bonded within the connector. The stub at the connector end-face is
factory polished and requires no field polishing. The fiber optic cable
is cleaved and installed into the rear of the connector and secured
with a special clamp (cam) inside the connector and crimped to the
fiber optic cable jacket. —J.G.
optic tool kit
Suppliers and independent training sources offer different levels of
training, including certified fiber optics installer and certified fiber optics
Fiber optic work involves potential hazards not found with copper
cabling, and safety procedures are an important part of safety training.
Working safely with fiber will be the topic of a future Cool Tools report.
GRIFFIN, a construction and tools writer from Oklahoma
City, can be reached at firstname.lastname@example.org.
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