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US 10,520,638 B1Granted
Optical fiber in metal tube with termination
AssigneePrysmian S.p.A.
InventorsMark Edmund Lowell, Toma Milouchev
Life of this patent
Estimating the term…
Abstract
The current disclosure describes a tube-in-tube optical fiber sensor system. A tube-in-tube optical fiber core includes an inner tube, an outer tube and one or more optical fiber sensors contained in the inner tube. The inner tube and the outer tube each include a termination portion about a sensing end of the optical fiber core. The termination portion of the outer tube includes a closed end that is swaged and welded.
Claims16
An optical fiber cable, comprising:
- an optical fiber sensor having a first end and a second end;
- a first metal tube having a longitudinal tubular portion and a first termination portion, the longitudinal tubular portion containing the optical fiber sensor and having a substantially consistent diameter from the first end of the optical fiber to the second end of the optical fiber, the first termination portion being integrated to the longitudinal tubular portion as a one-piece structure adjacent to the first end of the optical fiber sensor, the first termination portion including a first closed end of the first metal tube that includes a convex external shape;
- and
- an encapsulation layer surrounding the first metal tube.
1 more element
An optical fiber core, comprising:
- an optical fiber having a first end;
- an inner tube having a first termination portion that fully contains the first end of the optical fiber;
- and
- an outer tube at least partially containing the inner tube and having a second termination portion that fully contains the first termination portion of the inner tube, the second termination portion including a swaged and welded end.
1 more element
A method, comprising:
- forming a first metal tube surrounding an optical fiber having a first end;
- closing an end of the first metal tube adjacent to the first end of the optical fiber through crimping;
- forming a second metal tube surrounding the first metal tube;
- after the forming the second metal tube, closing an end of the second metal tube adjacent to the end of the first metal tube through swaging;
- and
- sealing the end of the second metal tube through welding.
3 more elements
Dependencies are inferred from the claim text.