Optical fiber unit for optical submarine cables
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United States of America Patent
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-
Sep 4, 1984
Grant Date -
N/A
app pub date -
May 17, 1982
filing date -
May 21, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical fiber unit for optical submarine cables, in which glass portions formed by a plurality of optical fibers each having at least one coating layer and twisted together at a required pitch are embedded in a resin layer. Adjacent two layers of the coating layer and the resin layer are formed of the same material or materials which satisfy the following condition; ##EQU1## where E.sub.1 is the Young's modulus of the inner one of the two layers, E.sub.2 is the Young's modulus of the outer one of the two layers, .nu..sub.1 is the Poisson's ratio of the inner one of the two layers and .nu..sub.2 is the Poisson's ratio of the outer one of the two layers, the thus coated portion being formed over the entire length of the optical fibers or at desired intervals.
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