Multilayer low attenuation drop cable
AssigneeCorning Research & Development Corporation
InventorsSebastian Olszewski, Marta Krystyna Tomczak
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Abstract
A communication cable is provided that retains low signal attenuation even after multiple cycles through significant temperature changes. The cable includes a communication element, a tight buffer element that surrounds the communication element, a strengthening element that surrounds the tight buffer element, an inner jacket that surrounds the strengthening element, and an outer jacket that surrounds the inner jacket. The outer jacket protects the interior components and is made of a hard material, and the inner jacket protects the communication element from the mechanical stresses of temperature-induced thermal expansion and contraction of the outer jacket.
Claims15
An optical fiber cable comprising:
- an optical fiber;
- a tight buffer layer that surrounds the optical fiber;
- a strengthening element that surrounds the tight buffer layer;
- an inner jacket that surrounds the strengthening element, the inner jacket comprising a first material having a first coefficient of thermal expansion and a first Shore D hardness, the first coefficient of thermal expansion being no more than 20 ppm/° C.;
- and
- an outer jacket that surrounds the inner jacket, the outer jacket comprising a second material having a second coefficient of thermal expansion and a second Shore D hardness, the second Shore D hardness being at least 40, wherein the first material is different from the second material;
- wherein the first coefficient of thermal expansion is less than the second coefficient of thermal expansion and the first Shore D hardness is less than the second Shore D hardness.
Dependencies are inferred from the claim text.