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US 4,538,881 AGranted
Optical fiber cable including a strain equalizing adhesive which constrains optical loss
AssigneeAT&T Bell Laboratories
InventorsStephen N. Anctil, Robert F. Gleason, Don A. Hadfield, John S. B. Logan, Jr., Alfred G. Richardson
Life of this patent
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Abstract
There is disclosed an undersea communications cable containing optical fibers. The cable is fabricated so that fiber optical loss characteristics vary only slightly with changes in tensile strain in the cable.
Claims5
An optical fiber cable comprising a core including
- a plurality of optical fibers, each fiber having an optical loss characteristic;
- an elastic material embedding the fibers;
- and
- a sheath surrounding the elastic material;
- stranded wire surrounding the sheath;
- and
- an adhesive bonding the stranded wire to the sheath for equalizing the strain of the fibers, the stranded wire, and the cable and thereby constraining the optical loss characteristic of each fiber to vary only slightly in response to changes of strain ranging from 0-1 percent in the cable.
4 more elements
Dependencies are inferred from the claim text.