Abstract: It is disclosed a cable for an overhead power transmission line, the cable comprising: a first optical unit comprising a first metal tube housing at least one an optical fiber suitable for sensing strain, the at least one optical fiber in the first metal tube being a tight buffered optical fiber fixed to an inner surface of the first metal tube; a second optical unit comprising a second metal tube comprising one or more loose optical fibers suitable for sensing temperature; and an armor comprising one or more layers of metal wires. The first optical unit is surrounded by at least one layer of semi-conductive or conductive material electrically contacting the outer surface of the first metal tube.

Abstract: Disclosed is an optical cable for distributed sensing. The optical cable comprises a first metal tube with at least two optical fibers loosely arranged therein and a second metal tube with at least two tight buffered optical fibers tightly arranged within an inner surface of the second metal tube. A third metal tube having an inner surface collectively surrounds and operatively contacts the first metal tube and said second metal tube. At least one of the first metal tube and the second metal tube is fixed by means of an adhesive compound to the inner surface of the third metal tube.

Abstract: Disclosed is an optical cable for distributed sensing. The optical cable comprises a first metal tube with at least two optical fibers loosely arranged therein and a second metal tube with at least two tight buffered optical fibers tightly arranged within an inner surface of the second metal tube. A third metal tube having an inner surface collectively surrounds and operatively contacts the first metal tube and said second metal tube. At least one of the first metal tube and the second metal tube is fixed by means of an adhesive compound to the inner surface of the third metal tube.

Abstract: An optical cable includes a plurality of optical fibers sealed within a metal tube, a polymer inner sheath surrounding the metal tube and operatively connected to the metal tube, and an outer sheath disposed over the polymer inner sheath.

Abstract: An optical cable includes a plurality of optical fibers sealed within a metal tube, a polymer inner sheath surrounding the metal tube and operatively connected to the metal tube, and an outer sheath disposed over the polymer inner sheath.