Rollable optical fiber ribbon

Patent metadata

Field	Value
Publication number	US-11150424-B2
Application number	US-201916262628-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Dec 6, 2018
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

The present disclosure provides a rollable optical fiber ribbon. The rollable optical fiber ribbon includes a plurality of optical fibers positioned along a longitudinal axis of the rollable optical fiber ribbon. In addition, the rollable optical fiber ribbon includes a matrix material covering the plurality of optical fibers. Each of the plurality of optical fibers is placed adjacent to other optical fiber of the plurality of optical fibers. Each of the plurality of optical fibers with a diameter of about 210±5 micron is spaced at a pitch in a range of about 250 microns to 255 microns. The rollable optical fiber ribbon is corrugated from a first side and a second side to enable rolling of the rollable optical fiber ribbon in circular fashion.

First claim

What we claim is:

1. A rollable optical fiber ribbon comprising:
a plurality of optical fibers positioned along a longitudinal axis of the rollable optical fiber ribbon, wherein each of the plurality of optical fibers is placed adjacent to other optical fiber of the plurality of optical fibers; and
a matrix material covering the plurality of optical fibers to provide flexibility to the rollable optical fiber ribbon, wherein the matrix material is made of curable UV acrylate having a degree of cure such that the curable UV acrylate is not fully cured,
wherein the rollable optical fiber ribbon is corrugated to enable rolling of the rollable optical fiber ribbon in circular fashion.

2. The rollable optical fiber ribbon as claimed in claim 1 , wherein each of the plurality of optical fibers has a diameter of about 210±5 micron, and wherein each of the plurality of optical fibers is spaced at a pitch in a range of about 250 microns to 255 microns.

3. The rollable optical fiber ribbon as claimed in claim 1 , wherein the matrix material is made of curable UV acrylate having elongation of about 55% and tensile strength of about 15 mega Pascal.

4. The rollable optical fiber ribbon as claimed in claim 1 , wherein the matrix material is made of curable UV acrylate having secant modulus of about 49 mega Pascal at 2.5% strain, wherein the matrix material made of curable UV acrylate in the form of 250 micro meter film coating absorbs 3.0% water when immersed in water for 24 hours, wherein cured coating of the curable UV acrylate of the matrix material has glass transition temperature of about −18 degree Celsius at 1000 mega Pascal, wherein the cured coating of the curable UV acrylate of the matrix material has glass transition temperature of about −28 degree Celsius at 100 mega Pascal.

5. The rollable optical fiber ribbon as claimed in claim 1 , wherein the matrix material made of curable UV acrylate in liquid form has a viscosity of about 9900 milli Pascal second at 25 degree Celsius, wherein the matrix material made of the curable UV acrylate in the liquid form has density of 1110 kilogram per cubic meter at 23 degree Celsius.

6. The rollable optical fiber ribbon as claimed in claim 1 , wherein the rollable optical fiber ribbon has a height in a range of about 250 microns to 300 microns.

7. The rollable optical fiber ribbon as claimed in claim 1 , wherein the rollable optical fiber ribbon has width of about 720 micro meter corresponding to 2 optical fibers, wherein the rollable optical fiber ribbon has width of about 1220 micro meter corresponding to 4 optical fibers, wherein the rollable optical fiber ribbon has width of about 1648 micro meter corresponding to 6 optical fibers, wherein the rollable optical fiber ribbon has width of about 2172 micro meter corresponding to 8 optical fibers, wherein the rollable optical fiber ribbon has width of about 3220 micro meter corresponding to 12 optical fibers.

8. The rollable optical fiber ribbon as claimed in claim 1 , wherein each of the plurality of optical fibers is placed by a distance in a range of about 35 microns to 50 microns from each other.

9. The rollable optical fiber ribbon as claimed in claim 1 , wherein the corrugation on a first side and a second side of the rollable optical fiber ribbon enables the rolling of the rollable optical fiber ribbon in clockwise direction and in anti-clock wise direction.

10. The rollable optical fiber ribbon as claimed in claim 1 , wherein the rollable optical fiber ribbon comprises a number of optical fibers in a range of about 4 to 12.

11. The rollable optical fiber ribbon as claimed in claim 1 , wherein the pitch is defined as a distance between centres of two adjacent fibers of the plurality of optical fibers, wherein the pitch in the range of about 250 microns to 255 microns in the rollable optical fiber ribbon enables quick splicing of the rollable optical fiber ribbon.

12. The rollable optical fiber ribbon as claimed in claim 1 , wherein the matrix material is applied throughout the plurality of optical fibers to restrict the movement of fibers during splicing operations.

13. The rollable optical fiber ribbon as claimed in claim 1 , wherein the rollable optical fiber ribbon facilitates mass fusion splicing operation along with reduction in cable diameter.

14. The rollable optical fiber ribbon as claimed in claim 1 , wherein the pitch in the range of about 250 microns to 255 microns enables the rollable optical fiber ribbon to be used for splicers.

15. A rollable optical fiber ribbon comprising:
a plurality of optical fibers positioned along a longitudinal axis of the rollable optical fiber ribbon, wherein each of the plurality of optical fibers is placed adjacent to other optical fiber of the plurality of optical fibers, wherein each of the plurality of optical fibers with a diameter of about 210±5 is spaced at a pitch in a range of about 250 microns to 255 microns; and
a matrix material covering the plurality of optical fibers to provide flexibility to the rollable optical fiber ribbon, wherein the matrix material is made of curable UV acrylate having a degree of cure such that the curable UV acrylate is not fully cured, wherein the matrix material has elongation of about 55% and tensile strength of about 15 mega Pascal,
wherein the rollable optical fiber ribbon is corrugated to enable rolling of the rollable optical fiber ribbon in circular fashion, wherein the rollable optical fiber ribbon facilitates mass fusion splicing operation along with reduction in cable diameter, wherein the pitch in the range of about 250 microns to 255 microns enables the rollable optical fiber ribbon to be used for splicers.

16. The rollable optical fiber ribbon as claimed in claim 15 , wherein the matrix material of the curable UV acrylate has secant modulus of about 49 mega Pascal at 2.5% strain, wherein the matrix material of the curable UV acrylate in the form of 250 micro meter film coating absorbs 3.0% water when immersed in water for 24 hours, wherein cured coating of the curable UV acrylate of the matrix material has glass transition temperature of about −18 degree Celsius at 1000 mega Pascal, wherein the cured coating of the matrix material of the curable UV acrylate has glass transition temperature of about −28 degree Celsius at 100 mega Pascal.

17. The rollable optical fiber ribbon as claimed in claim 15 , where the rollable optical fiber ribbon has a height in a range of about 250 microns to 300 microns.

18. The rollable optical fiber ribbon as claimed in claim 15 , wherein the rollable optical fiber ribbon has width of about 720 micro meter corresponding to 2 optical fibers, wherein the rollable optical fiber ribbon has width of about 1220 micro meter corresponding to 4 optical fibers, wherein the rollable optical fiber ribbon has width of about 1648 micro meter corresponding to 6 optical fibers, wherein the rollable optical fiber ribbon has width of about 2172 micro meter corresponding to 8 optical fibers, wherein the rollable optical fiber ribbon has width of about 3220 micro meter corresponding to 12 optical fibers.

19. A rollable optical fiber ribbon comprising:
a plurality of optical fibers positioned along a longitudinal axis of the rollable optical fiber ribbon, wherein each of the plurality of optical fibers is placed adjacent to other optical fiber of the plurality of optical fibers, wherein each of the plurality of optical fibers with a diameter of about 210±5 micron is spaced at a pitch in a range of about 250 microns to 255 microns; and a matrix material covering t

Assignees

• Sterlite Tech Ltd

Inventors

• Kumar Sravan
• Murthy Venkatesh
• Sahoo Kishore

Classifications

• G02B6/4429

  Means specially adapted for strengthening or protecting the cables · CPC title

• G02B6/4403 Primary

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

• G02B6/02357

  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 title

• G02B6/02333

  Core having higher refractive index than cladding, e.g. solid core, effective index guiding · CPC title