Information Technology Reference
In-Depth Information
Chemicals
Virtually all types of fiber cable termination use some type of chemical.
The older epoxy-style connectors use a harsh, two-part resin and hardener
combination that can harm skin, clothes, and eyes. Some of the newer field-termi-
nation connector designs use a cyano-acrylic composition that is much like a thick-
ened version of “superglue.” It is harmful to all of the above, and in addition can
“weld” skin together when in its preactivated state. The cyano-acrylics are activated
by water vapor, and are soluble in acetone (which many fingernail polish removers
contain). You would be wise to keep a supply of chemical wipes (a sort of heavy
woven tissue) and acetone solvent handy when you are using these products.
If any of this superglue contacts the eye or the lid, seek medical attention imme-
diately. You should not attempt to remove the material yourself.
In addition, the normal procedure is to use an alcohol wipe to clean the bare
fiber after removal of the tight buffer. Alcohol, of course, is flammable. In addition,
the type of alcohol most commonly used for a cleaning solvent is poisonous when
ingested, and is harmful to the eyes.
Glass Fiber Safety
Another aspect of fiber-optic safety is care with the fiber strands that are the object
of our interest. Although they are very flexible, optical fibers are still made of glass
(silica) and can fragment, fracture, chip, and pulverize. Tiny fragments of the glass
can fly into the air (and the eye), splinter in the skin, and even be inhaled.
Consequently, you should “handle like glass,” as the saying goes. For the most part,
fiber connector assembly is uneventful, but you should always wear your safety
glasses, use the proper tools, and assemble the components on an appropriate sur-
face. In the case of glass fiber, the most appropriate surface is a no-slip plastic or
rubberized mat of a dark color. It is much easier to see the fiber (and any shards) on
a black mat than on a normal light-colored table.
Use proper lighting and position the work surface at a convenient height. Place
any chemicals safely off to the side and out of the way when they are not being used.
Keep all liquids and glues capped when not in immediate use. Stay away from all
sources of flame or sparks.
In the unlikely event that you get a glass splinter in the skin, it is best to use
plastic-coated tweezers to remove the splinter. Using regular metal tweezers can
cause the splinter to break at the skin surface, which results in a more difficult (and
painful) problem. Always refer the removal of any glass particles in the eye to a
qualified medical practitioner.
