Hybrid Fiber Coax (HFC): A cable construction that includes both optical fiber and copper components as transmission media.
HFC Network: A telecommunications network consisting of both fiber optic and copper components, as in FTTC.
IEEE: Abbreviation for Institute of Electrical and Electronics Engineers. A professional association that contributes to voluntary standards within these industries.
Index of Refraction: The ratio of the velocity of light in free space to the velocity of light in a fiber.
InGaAsP: Abbreviation for Indium Gallium Arsenide Phosphide. Used in high performance detectors.
Insertion Loss: Loss resulting from inserting a component (connector, splice, etc.) into a fiber path.
Interferometer: An instrument used to measure the endface geometry of a fiber optic connector for critical parameters including apex offset, radius of curvature, and fiber height.
Intrinsic Loss: Loss in spliced fibers due to differences in the fibers being spliced.