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US 4,183,621 AGranted
Water resistant high strength fibers
AssigneeInternational Telephone and Telegraph Corporation
InventorsCharles K. Kao, Mokhtar S. Maklad
Life of this patent
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Abstract
Optical communication fibers having improved fatigue resistance are provided by encapsulating the fibers in a water impervious material. The water impervious material prevents the interaction of water with glass along the fiber outer surface and prolongs the operational life-time of the fibers.
Claims8
An optical communication fiber having improved fatigue resistance comprising:
- an optical fiber core of a glass material having a first index of refraction;
- a cladding material over the glass core having an index of refraction lower than that of the core;
- and
- a water impervious carbon layer over the cladding layer to prevent atmospheric moisture from reaching the surface of the cladding layer.
1 more element
An optical fiber having improved fatigue resistance comprising:
- a glass core material having a first index of refraction;
- a cladding glass material disposed over the surface of said core material and having an index of refraction lower than said core material;
- a layer of silicone resin over the surface of the cladding material;
- and
- a water impervious carbon layer over the silicone resin to prevent atmospheric moisture from reaching the outer surface of the silicone resin.
2 more elements
Dependencies are inferred from the claim text.