Fiber-optic cable

• US 8,831,390 B2
• Filed: 09/19/2012
• Issued: 09/09/2014
• Est. Priority Date: 09/20/2011
• Status: Active Grant

• Current Assignee: NKT Photonics GmbH (NKT A/S)
• Original Assignee: Lios Technology Gmbh (NKT A/S)
• Inventors: Hill, Wieland, Fromme, Martin, Kurtscheid, Friedhelm
• Primary Examiner(s): Kim, Ellen
• Application Number:
  US13/622,709
• Publication Number:
  US 20130071074A1
• Time in Patent Office: 720 Days
• Field of Search: 385/104, 385/100, 385/102, 385/106, 385/13, 385/101, 385/107
• US Class Current: 385/101
• CPC Class Codes: G02B 6/443 Protective covering

Abstract

Fiber-optic cable useful in a borehole is provided, with at least one optical waveguide (2), at least one metallic tube (1) which at least partially surrounds the at least one optical waveguide (2), and at least one additional layer, which at least partially surrounds the at least one metallic tube (1). The fiber-optic cable includes a separator which contributes to or cause mechanical decoupling of individual components of the fiber-optic cable.

Claims

1. A fiber-optic cable comprising:

at least one optical waveguide (2),

at least one metallic tube (1) which at least partially surrounds the at least one optical waveguide (2),

at least one additional layer, which at least partially surrounds the at least one tube (1),

wherein the fiber-optic cable comprises a separator which contributes to or causes mechanical decoupling of the at least one tube (1) from the at least one additional layer, wherein at least one additional layer is configured as an electrical conductor (3, 12) and operates as a supply and/or return conductor; and

wherein the fiber-optic cable comprises reinforcement, which serves as a strain relief and is arranged between the at least one metallic tube and the separator.

2. The fiber-optic cable according to claim 1, wherein the separator is formed as at least one foil (4, 6) disposed radially between the at least one tube (1) and the at least one additional layer.

3. The fiber-optic cable according to claim 1, wherein the reinforcement corresponds to the at least one additional layer or is formed as at least one additional layer.

4. The fiber-optic cable according to claim 1, wherein the separator is arranged between the at least one tube (1) and the reinforcement.

5. The fiber-optic cable according to claim 1, wherein the reinforcement comprises fibers (5, 8) or consists of fibers (5, 8).

6. The fiber-optic cable according to claim 1, wherein the reinforcement comprises at least one of aramide fibers, Zylon®

, Dyneeema®

, glass fibers or carbon fibers.

7. The fiber-optic cable according to claim 1, wherein the reinforcement is formed as reinforcement.

13. The fiber-optic cable according to claim 1, wherein the fiber-optic cable is utilized in boreholes.

14. The fiber-optic cable according to claim 1, wherein the reinforcement consists of one of aramide fibers, Zylon®

, Dyneema®

, glass fibers or carbon fibers.

15. The fiber-optic cable according to claim 7, wherein the reinforcement is formed as a lay.

8. A fiber-optic cable comprising:

at least one optical waveguide (2).

at least one metallic tube (1) which at least partially surrounds the at least one optical waveguide (2),

at least one additional layer, which at least partially surrounds the at least one tube (1),

wherein the fiber-optic cable comprises a separator which contributes to or causes mechanical decoupling of individual components of the fiber-optic cable, wherein the separator comprises two foils (4, 6) between which an additional layer of the cable is disposed other than that of the separator.

9. The fiber-optic cable according to claim 8, wherein the innermost of the two foils (4, 6) indirectly or directly surrounds the tube (1).

10. The fiber-optic cable according to claim 8, wherein the reinforcement is disposed between the two foils (4, 6).

11. The fiber-optic cable according to claim 8, wherein the outermost of the two foils (4, 6) is surrounded by parts (10a, 10b) of a traction cable disposed radially outward of the reinforcement.

16. The fiber-optic cable according to claim 11, wherein the parts (10a, 10b) of the traction cable is conductive.

12. A fiber-optic cable comprising:

at least one optical waveguide (2),

at least one metallic tube (1) which at least partially surrounds the at least one optical waveguide (2),

at least one additional layer, which at least partially surrounds the at least one tube (1),

wherein the fiber-optic cable comprises a separator which contributes to or causes mechanical decoupling of individual components of the fiber-optic cable, wherein a conductor (3) is arranged on the outside of the tube (1) and in direct physical contact with the innermost of the two coils (4, 6).