Dry padded optic fiber ribbons for dry optic fiber cable

Patent metadata

Field	Value
Publication number	US-10901165-B2
Application number	US-201816176342-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Jun 1, 2018
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

The present invention relates to padded optic fiber ribbons for dry optic fiber cables. The dry padded optic fiber ribbons include a plurality of optic fiber ribbons stacked on top of each other having a cross-sectionally rectangular shape. In addition, the dry padded optic fiber ribbons include a plurality of dry paddings. Each dry padding of the plurality of dry paddings has an inner side and an outer side. Further, the dry padded optic fiber ribbons include at least one tape wrapping around the plurality of dry paddings.

First claim

We claim:

1. Dry padded optic fiber ribbons for dry optic fiber cables, comprising:
a plurality of optic fiber ribbons stacked on top of each other having a cross-sectionally rectangular shape;
a plurality of dry paddings, each having an inner side and an outer side; and
at least one tape wrapped continuously around the plurality of dry paddings in repeated cable lays, wherein each cable lay represents a spiral wrap of the at least one tape, and wherein the at least one tape is applied with air gaps between each repeated circle along the direction the plurality of dry paddings extend, the air gaps extending downward in a tilted direction to induce water on the outside of the plurality of dry paddings to flow downward,
wherein each of the plurality of dry paddings is attached to one side of the rectangular shape of the stacked optic fiber ribbons, wherein each inner side of the plurality of dry paddings is in a flush contact with one side of the rectangular shape and the outer sides of the plurality of dry paddings form an elliptical shape.

2. The dry padded optic fiber ribbons as recited in claim 1 , wherein each of the plurality of dry paddings is made of a super absorbent non-woven polymer, wherein each of the plurality of dry paddings has a thickness of about 0.6 millimeter at the center when there are 12 optic fiber ribbons and each ribbon encloses 12 optic fibers.

3. The dry padded optic fiber ribbons as recited in claim 1 , wherein the at least one tape has a thickness of about 0.6 millimeter, wherein at least one tape has a width of about 2 to 4 millimeters.

4. The dry padded optic fiber ribbons as recited in claim 1 , wherein the at least one tape wraps around the stacked optic fiber ribbons in a spiral manner to reduce air gaps formed therein.

5. The dry padded optic fiber ribbons as recited in claim 1 , wherein each of the plurality of optic fiber ribbons includes a plurality of optic fibers, wherein each of the plurality of optic fibers has a diameter of about 0.2-0.25 millimeter.

6. The dry padded optic fiber ribbons as recited in claim 1 , wherein the plurality of dry paddings is used to improve the symmetry of the packaged ribbons, wherein each of the plurality of dry paddings improves performance on water blockage, wherein each of the plurality of dry paddings improves optic performance that reduces the problem of Polarization Mode Dispersion (“PMD”).

7. The dry padded optic fiber ribbons as recited in claim 1 , wherein the dry padded optic fiber ribbons has a diameter of about 5.5-6.5 millimeter when there are 12 optic fiber ribbons and each optic fiber ribbon encloses 12 optic fibers.

8. The dry padded optic fiber ribbons as recited in claim 1 , wherein each of the plurality of dry paddings comprises at least one of a polyester, polyacrylate and water swellable powder.

9. Dry padded optic fiber ribbons for dry optic fiber cables, comprising:
a plurality of optic fiber ribbons stacked on top of each other having a cross-sectionally rectangular shape;
a plurality of dry paddings, each having an inner side and an outer side; and
at least one tape wrapped continuously around the plurality of dry paddings in repeated cable lays, wherein each cable lay represents a spiral wrap of the at least one tape, and wherein the at least one tape is applied with air gaps between each repeated circle along the direction the plurality of dry paddings extend, the air gaps extending downward in a tilted direction to induce water on the outside of the plurality of dry paddings to flow downward,
wherein each of the plurality of dry paddings is attached to one side of the rectangular shape of the stacked optic fiber ribbons, wherein each inner side of the plurality of dry paddings is in a flush contact with one side of the rectangular shape and the outer sides of the plurality of dry paddings form an elliptical shape,
wherein each of the plurality of dry paddings is made of a super absorbent non-woven polymer, wherein each of the plurality of dry paddings has a thickness of about 0.6 millimeter at the center when there are 12 optic fiber ribbons and each ribbon encloses 12 optic fibers,
wherein the dry padded optic fiber ribbons has a diameter of about 5.5-6.5 millimeter when there are 12 optic fiber ribbons and each optic fiber ribbon include 12 optic fibers.

10. A method for dry padding optic fiber ribbons for dry optic fiber cables, comprising:
selecting a plurality of optic fiber ribbons stacked on top of each other having a cross-sectionally rectangular shape;
selecting a plurality of dry paddings, each having an inner side and an outer side; and
selecting at least one tape wrapped continuously around the plurality of dry paddings in repeated cable lays, wherein each cable lay represents a spiral wrap of the at least one tape, and wherein the at least one tape is applied with air gaps between each repeated circle along the direction the plurality of dry paddings extend, the air gaps extending downward in a tilted direction to induce water on the outside of the plurality of dry paddings to flow downward,
wherein each of the plurality of dry paddings is attached to one side of the rectangular shape of the stacked optic fiber ribbons, wherein each inner side of the plurality of dry paddings is in a flush contact with one side of the rectangular shape and the outer sides of the plurality of dry paddings form an elliptical shape.

11. The method as recited in claim 10 , wherein each of the plurality of dry paddings is made of a super absorbent non-woven polymer, wherein each of the plurality of dry paddings has a thickness of about 0.6 millimeter at the center when there are 12 optic fiber ribbons and each ribbon encloses 12 optic fibers.

12. The method as recited in claim 10 , wherein at least one tape has a thickness of about 0.6 millimeter, wherein at least one tape has a width of about 2 to 4 millimeters.

13. The dry padded optic fiber ribbons as recited in claim 10 , wherein the at least one tape wraps around the stacked optic fiber ribbons in a spiral manner to reduce air gaps formed therein.

14. The method as recited in claim 10 , wherein each of the plurality of optic fiber ribbons includes a plurality of optic fibers, wherein each of the plurality of optic fibers has a diameter of about 0.2-0.25 millimeter.

15. The method as recited in claim 10 , wherein the plurality of dry paddings is used to improve the symmetry of the packaged ribbons, wherein each of the plurality of dry paddings improves performance on water blockage, wherein each of the plurality of dry paddings improves optic performance that reduces the problem of Polarization Mode Dispersion (“PMD”).

16. The method as recited in claim 10 , wherein the dry padded optic fiber ribbons has a diameter of about 5.5-6.5 millimeter when there are 12 optic fiber ribbons and each optic fiber ribbon encloses 12 optic fibers.

17. The method as recited in claim 10 , wherein each of the plurality of dry paddings comprises at least one of a polyester, polyacrylate and water swellable powder.

Assignees

• Sterlite Tech Ltd

Inventors

• Benjamin Seldon
• Kumar Sravan
• Sahoo Kishore

Classifications

• G02B6/44384 Primary

  the means comprising water blocking or hydrophobic materials (G02B6/4439, G02B6/4479 take precedence) · CPC title

• G02B6/4411 Primary

  Matrix structure · CPC title

• G02B6/4403

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

• G02B6/3885

  Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type (optical ribbon cable G02B6/4403, G02B6/448) · CPC title

• G02B6/4494 Primary

  Physics · mapped topic