Fiber optic cables and assemblies and the performance thereof

• US 7,397,991 B1
• Filed: 12/13/2006
• Issued: 07/08/2008
• Est. Priority Date: 12/13/2006
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Register, James A.
• Primary Examiner(s): KIANNI, KAVEH C
• Application Number:
  US11/638,627
• Publication Number:
  US 20080145011A1
• Time in Patent Office: 573 Days
• Field of Search: 385/102, 385/103, 385/104
• US Class Current: 385/102
• CPC Class Codes: G02B 6/02357 Property of longitudinal structures or background material varies radially and/or azimuthally in the cladding, e.g. size, spacing, periodicity, shape, refractive index, graded index, quasiperiodic, quasicrystals
• CPC Class Codes: G02B 6/02366 Single ring of structures, e.g. "air clad"
• CPC Class Codes: G02B 6/4402 with one single optical waveguide G02B6/4429, G02B6/4439, G02B6/4479 take precedence
• CPC Class Codes: G02B 6/4432 with fibre reinforcements

Abstract

A fiber optic cable having at least one optical fiber such as a microstructured bend performance optical fiber disposed within a protective covering. The protective covering is highly flexible and the fiber optic cable has extremely low delta attenuation when aggressively bent compared with the conventional fiber optic cable designs. By way of example, the delta attenuation of one fiber optic cable design is about 0.33 dB or less when wrapped 3 turns about a 7.5 millimeter mandrel at a reference wavelength of 1625 nanometers. Other variations of the present invention include a connector attached to the fiber optic cable.

Claims

1. A fiber optic cable, comprising:

at least one optical fiber;

a protective covering, the protective covering being highly flexible and provides a bend control mechanism for inhibiting bending of the at least one optical fiber at a diameter of 5 millimeters or less, wherein the protective covering has an ultimate elongation of about 500% or more measured according to DIN 53504.

2. The fiber optic cable of claim 1, the at least one optical fiber being a microstructured bend performance optical fiber.

3. The fiber optic cable of claim 1, further including at least one strength member, wherein the protective covering is coupled about the at least one strength member for inhibiting buckling of the at least one optical fiber therein.

4. The fiber optic cable of claim 1, the fiber optic cable having a delta attenuation at of about 0.1 dB or less for a corner bend test with a load of 1 kilogram and a reference wavelength of 1625 nanometers.

5. The fiber optic cable of claim 1, the fiber optic cable having a delta attenuation of about 0.33 dB or less when wrapped 3 turns about a 7.5 millimeter mandrel at a reference wavelength of 1625 nanometers.

6. The fiber optic cable of claim 1, the at least one optical fiber having a buffer layer thereon.

7. The fiber optic cable of claim 1, the fiber optic cable being flame-retardant.

8. The fiber optic cable of claim 1, the fiber optic cable having a protective covering that includes a buffer layer and a jacket.

9. The fiber optic cable of claim 1, further including a connector attached to the fiber optic cable.

10. A fiber optic cable, comprising:

at least one optical fiber, the at least one optical fiber being a microstructured bend performance optical fiber;

a protective covering, being highly flexible and provides a bend control mechanism for inhibiting bending of the at least one optical fiber at a diameter of 5 millimeters or less, wherein the protective covering has an ultimate elongation of about 500% or more measured according to DIN 53504 and the protective covering is coupled for inhibiting buckling of the at least one optical fiber therein.

11. The fiber optic cable of claim 10, further including at least one strength member, wherein the protective covering is coupled about the at least one strength member for inhibiting buckling of the at least one optical fiber therein.

12. The fiber optic cable of claim 10, the fiber optic cable having a delta attenuation at of about 0.1 dB or less for a corner bend test with a load of 1 kilogram and a reference wavelength of 1625 nanometers.

13. The fiber optic cable of claim 10, the fiber optic cable having a delta attenuation of about 0.33 dB or less when wrapped 3 turns about a 7.5 millimeter mandrel at a reference wavelength of 1625 nanometers.

14. The fiber optic cable of claim 10, the at least one optical fiber having a buffer layer thereon.

15. The fiber optic cable of claim 10, the fiber optic cable being flame-retardant.

16. The fiber optic cable of claim 10, the fiber optic cable having a protective covering that includes a buffer layer and a jacket.

17. The fiber optic cable of claim 10, further including a connector attached to the fiber optic cable.

18. A fiber optic cable, comprising:

at least one optical fiber, the at least one optical fiber being a microstructured bend performance optical fiber having a buffer layer thereon;

at least one strength member;

a protective covering, being highly flexible and provides a bend control mechanism for inhibiting bending of the at least one optical fiber at a diameter of 5 millimeters or less, wherein the protective covering has an ultimate elongation of about 500% or more measured according to DIN 53504 and is coupled about the at least one strength member for inhibiting buckling of the at least one optical fiber therein.

19. The fiber optic cable of claim 18, the fiber optic cable having a delta attenuation at of about 0.1 dB or less for a corner bend test with a load of 1 kilogram and a reference wavelength of 1625 nanometers.

20. The fiber optic cable of claim 18, the fiber optic cable having a delta attenuation of about 0.33 dB or less when wrapped 3 turns about a 7.5 millimeter mandrel at a reference wavelength of 1625 nanometers.

21. The fiber optic cable of claim 18, the fiber optic cable being flame-retardant.

22. The fiber optic cable of claim 18, further including a connector attached to the fiber optic cable.