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Appendix B
Glossary
Adapter
A device used to mate fiber connectors of the same or
different styles.
Attenuation
A loss of optical power due to losses in the fiber itself or in
connections between fibers.
Core
The light-conducting central portion of an optical fiber.
dBm
A unit of power (in decibels), assuming a reference of
1 mW (1/1000 of a watt).
Insertion loss
Loss of optical power caused by adding a connector,
adapter, splice, or other optical component to a fiber path.
Launch cable
A fiber patch cord used to couple an optical source to a
fiber.
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