Optical fiber cables with flat ribbon fibers

Patent metadata

Field	Value
Publication number	US-10036863-B2
Application number	US-201615216780-A
Country	US
Kind code	B2
Filing date	Jul 22, 2016
Priority date	Jul 22, 2015
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

An optical fiber cable comprising a duct space and a fiber density in the duct space. The fiber density is greater than 2.3 fibers/mm 2 .

First claim

What is claimed is:

1. A cable, comprising:
an outer jacket;
a duct space internal to the outer jacket;
a longitudinal strength member located within the duct space;
a first buffer tube aligned with the longitudinal strength member, the first buffer tube being located within the duct space;
a first stack of flat ribbons located within the first buffer tube, the first stack comprising 200 μm optical fibers;
a second buffer tube aligned with the longitudinal strength member, the second buffer tube being located within the duct space; and
a second stack of flat ribbons located within the second buffer tube, the second stack comprising 200 μm optical fibers.

2. The cable of claim 1 , further comprising a fiber density in the duct space that is greater than 2.3 fibers/mm 2 , the duct space having a diameter that is less than 25 mm.

3. The cable of claim 1 , further comprising a fiber density in the duct space that is greater than 2.7 fibers/mm 2 , the duct space having a diameter that is less than 23 mm.

4. The cable of claim 1 , further comprising a fiber density in the duct space that is greater than 2.5 fibers/mm 2 , the duct space having a diameter that is less than 24 mm.

5. The cable of claim 1 , further comprising:
a third buffer tube aligned with the longitudinal strength member, the third buffer tube being located within the duct space;
a third stack of flat ribbons located within the third buffer tube, the third stack comprising 200 μm optical fibers;
a fourth buffer tube aligned with the longitudinal strength member, the fourth buffer tube being located within the duct space;
a fourth stack of flat ribbons located within the fourth buffer tube, the fourth stack comprising 200 μm optical fibers.

6. The cable of claim 5 , wherein:
the first stack comprises 12 flat ribbons with each flat ribbon comprising 24 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the second stack comprises 12 flat ribbons with each flat ribbon comprising 24 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the third stack comprises 12 flat ribbons with each flat ribbon comprising 24 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm; and
the fourth stack comprises 12 flat ribbons with each flat ribbon comprising 24 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm.

7. The cable of claim 5 , further comprising:
a fifth buffer tube aligned with the longitudinal strength member, the fifth buffer tube being located within the duct space;
a fifth stack of flat ribbons located within the fifth buffer tube, the fifth stack comprising 200 μm optical fibers;
a sixth buffer tube aligned with the longitudinal strength member, the sixth buffer tube being located within the duct space;
a sixth stack of flat ribbons located within the sixth buffer tube, the sixth stack comprising 200 μm optical fibers;
a seventh buffer tube aligned with the longitudinal strength member, the seventh buffer tube being located within the duct space;
a seventh stack of flat ribbons located within the seventh buffer tube, the seventh stack comprising 200 μm optical fibers;
a eighth buffer tube aligned with the longitudinal strength member, the eighth buffer tube being located within the duct space; and
a eighth stack of flat ribbons located within the eighth buffer tube, the eighth stack comprising 200 μm optical fibers.

8. The cable of claim 7 , wherein:
the first stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the second stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the third stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm; and
the fourth stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the fifth stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the sixth stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm;
the seventh stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm; and
the eighth stack comprises 12 ribbons with each flat ribbon comprising 12 optical fibers, each optical fiber having a coating with an outer diameter of approximately 200 μm.

Assignees

• Ofs Fitel Llc

Inventors

• Debban Harold P
• Ly Heng
• Weimann Peter A

Classifications

• G02B6/4433

  Double reinforcement laying in straight line with optical transmission element · CPC title

• G02B6/441 Primary

  built up from sub-bundles (G02B6/4429, G02B6/4439, G02B6/4479 take precedence) · CPC title

• G02B6/4403

  with ribbon structure (G02B6/4429, G02B6/4439, G02B6/4479 take precedence) · CPC title

• G02B6/4434

  Central member to take up tensile loads · CPC title

• G02B6/4494

  Physics · mapped topic