index-matching gel

index-matching gel definition - telecom
A gelatinous substance with an index of refraction (IOR) that closely matches that of the core of an optical fiber. Mechanical splices and connectors are filled with index-matching gel to reduce Fresnel reflections from a fiber end face. See also connector, core, Fresnel reflection, IOR, mechanical splice, and optical fiber.

Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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