Optical cable with peelable strength member portion
View Patent ↗A fiber optic cable that includes one or more optical fibers, and one or more strength members spanning the length of the cable. The cable also includes a protective jacket protecting the cable across all, or at least substantially all of its length. One or more ends of the cable (and potentially as much as the entire length of the cable), includes a jacket portion that surrounds the strength member(s), and a jacket portion that surrounds the optical fiber(s). These jacket portions are connected by a peelable separation portion. Accordingly, when the optical fiber portion of the jacket is pulled relative to the strength member portion of the jacket, the separation portion ruptures permitting the strength member portion and the optical fiber portion to be peeled away from each other. This allows for independent control of the termination of the strength member(s) relative to the optical fiber(s).
1. A fiber optic cable comprising:
a plurality of optical fibers spanning the length of the fiber optic cable;
one or more strength members spanning the length of the fiber optic cable, wherein the one or more strength members are capable of withstanding tensile forces greater than each of the plurality of optical fibers; and
a jacket positioned around the plurality of optical fibers and the one or more strength members spanning substantially all of the length of the fiber optic cable,
wherein at least at one end of the fiber optic cable, the jacket includes:
a strength member portion that surrounds the one or more strength members;
an optical fiber portion that surrounds the plurality of optical fibers; and
a separation portion between the strength member portion and the optical fiber portion, the separation portion being structured such that when force is applied pulling the optical fiber portion from the strength member portion, the separation portion ruptures first to thereby allow the strength member portion and the optical fiber portion of the jacket to peel away from each other at the end of the fiber optic cable, and
wherein the fiber optic cable has a bilaterally symmetric cross-section defined by a line of symmetry that divides the plurality of optical fibers into a first group of one or more optical fibers and a second group of one or more optical fibers.
2. The fiber optic cable in accordance with claim 1 , wherein the plurality of optical fibers comprise a single optical fiber in the first group and a single optical fiber in the second group.
3. The fiber optic cable in accordance with claim 2 , wherein the single optical fiber in the first group has a first central axis and the single optical fiber in the second group has a second central axis, the first and second axes being separated by a distance substantially equal to a width of the strength member portion of the jacket.
4. The fiber optic cable in accordance with claim 3 , wherein the one or more strength members comprise a single strength member.
5. The fiber optic cable in accordance with claim 2 , wherein the one or more strength members comprise a single strength member.
6. The fiber optic cable in accordance with claim 1 , wherein the one or more strength members comprise a single strength member.
7. The fiber optic cable in accordance with claim 1 , wherein the separation portion of the jacket has a width that is smaller than a width of the strength member portion of the jacket.
8. The fiber optic cable in accordance with claim 1 , wherein the separation portion of the jacket has a width that is less than half of the width of the strength member portion of the jacket.
9. The fiber optic cable in accordance with claim 1 , wherein the strength member portion of the jacket, and the optical fiber portion of the jacket meet each other at the separation portion at an acute angle that is less than 60 degrees.
10. The fiber optic cable in accordance with claim 1 , wherein the one or more strength members are composed of aramid yarn.
11. The fiber optic cable in accordance with claim 1 , wherein the jacket is composed of plastic.
12. The fiber optic cable in accordance with claim 1 , wherein the jacket is composed primarily of PolyVinyl Chloride (PVC).
13. The fiber optic cable in accordance with claim 1 , wherein the separation portion of the jacket is a first separation portion of the jacket and wherein the optical fiber portion of the jacket comprises the following at least at the end of the fiber optic cable:
a first optical fiber subportion surrounding the first group of one or more optical fibers;
a second optical fiber subportion surrounding the second group of one or more optical fibers; and
a second separation portion between a first optical fiber subportion and the second optical fiber subportion, the second separation portion being structured such that when force is applied pulling the first optical fiber subportion from the second optical fiber subportion, the second separation portion ruptures first to thereby allow the first and second optical fiber subportions to peel away from each other at least at the end of the fiber optic cable.
14. A fiber optic cable comprising:
a plurality of optical fibers spanning the length of the fiber optic cable;
one or more strength members spanning the length of the fiber optic cable, wherein the one or more strength members are stronger in the aggregate than the plurality of optical fibers in the aggregate; and
a jacket positioned around the plurality of optical fibers and the one or more strength members spanning substantially all of the length of the fiber optic cable,
wherein at least at one end of the fiber optic cable, the jacket includes:
a strength member portion that surrounds the one or more strength members;
an optical fiber portion that surrounds the plurality of optical fibers; and
a separation portion between the strength member portion and the optical fiber portion, the separation portion being structured such that when force is applied pulling the optical fiber portion from the strength member portion, the separation portion ruptures first to thereby allow the strength member portion and the optical fiber portion of the jacket to peel away from each other at the end of the fiber optic cable, and
wherein the fiber optic cable has a bilaterally symmetric cross-section defined by a line of symmetry that divides the plurality of optical fibers into a first group of one or more optical fibers and a second group of one or more optical fibers.
15. The fiber optic cable of claim 14 , wherein the strength member portion and the optical fiber portion are already peeled apart from each other at an end of the fiber optic cable, leaving the strength member portion and the optical fiber portion connected at the separation portion further from the end of the fiber optic cable.
16. The fiber optic cable of claim 14 , wherein at least one of the one or more optical fibers is composed of glass.
17. The fiber optic cable of claim 14 , wherein at least one of the one or more optical fibers is composed of plastic.
18. The fiber optical cable of claim 14 , wherein at least a portion of the optical fiber portion of the jacket is stripped away from the plurality of optical fibers.
19. A method for preparing an fiber optic cable for termination, the fiber optic cable comprising a plurality of optical fibers spanning the length of the fiber optic cable, one or more strength members spanning the length of the fiber optic cable, and a jacket positioned around the plurality of optical fibers and the one or more strength members, the method comprising:
an act of pulling at least one of an optical fiber portion of the jacket that surrounds the plurality of optical fibers and a strength member portion of the jacket that surrounds the one or more strength members;
an act of rupturing a first separation portion of the jacket as a result of the act of pulling the at least one of optical fiber and strength member portions of the jacket, thereby peeling at least a portion of the strength member portion of the jacket away from the optical fiber portion of the jacket;
an act of pulling at least one of a first and a second optical fiber subportion of the optical fiber portion of the jacket, the first and second subportions surrounding first and second respective groups of one or more optical fibers; and
an act of rupturing a second separation portion of the jacket as a result of the act of pulling the at least one of first and second optical fiber subportions of the optical fiber portion, thereby peeling at least a portion of the first optical fiber subportion away from at least a portion of the second optical fiber subportion.
20. The method of claim 19 , further comprising:
an act of cutting the cable prior to the act of pulling the at least one of optical fiber and strength member portions of the jacket.