Method of ring marking of an optical fiber and optical fiber thereof

Patent metadata

Field	Value
Publication number	US-12399338-B2
Application number	US-201917256018-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Oct 25, 2018
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

The present disclosure provides a method of single ring marking of an optical fiber. The method includes a first step of marking a first single ring marking of the optical fiber. In addition, the method includes a second step of marking a second single ring marking of the optical fiber. Further, the present disclosure provides a method of double ring marking of an optical fiber. Furthermore, the method includes a first step of marking a first ring marking, a second step of marking a second ring marking and a third step of marking a third ring marking.

First claim

We claim:

1. An optical fiber comprising:
a first coating layer on the optical fiber;
a second coating layer on the first coating layer;
a first single ring marking having a first part and a second part;
wherein the first single ring marking having a first part and second part are formed between the first coating layer and the second coating layer of the optical fiber; wherein at least one of the first coating layer and the second coating layer is a colored layer; and wherein the first single ring marking has a width in a range of 2.3 millimeters to 2.5 millimeters, and
wherein the first part of the first single ring marking and the second part of the first single ring marking has a width in a range of 700 microns to 732 microns,
thereby, while forming the marking, pressure is distributed on the first coating layer that avoids direct stress on the optical fiber during ring marking process.

2. The optical fiber as claimed in claim 1 , further comprising a second single ring marking, the second single ring marking including a first part of the second single ring marking and a second part of the second single ring marking, wherein at least one of:
the first part of the second single ring marking and the second part of the second single ring marking are separated by distance of 900 microns, and
the first part of the second single ring marking and the second part of the second single ring marking has a width in range of 700 microns to 732 microns; and
wherein the second single ring marking has a width in a range of 2.3 millimeters to 2.5 millimeters.

3. An optical fiber comprising:
a first single ring marking having a first part and second part separated by a distance of 900 microns;
a second single ring marking separated from the first single ring marking by at least one of a distance of 47.7 millimeters from inner ends and by a distance of 52.2 millimeters from outer ends, a second single ring marking having a first part and second part separated by a distance of 900 microns, wherein the first single ring marking and the second single ring marking are between a first coating layer and a second coating layer of the optical fiber and are marked along a longitudinal length of the optical fiber.

4. The optical fiber as claimed in claim 3 , wherein at least one of: the first coating layer is a color coating layer, the first coating layer is a transparent coating layer, the second coating layer is a color coating layer, the second coating layer is a transparent coating layer, wherein the first coating layer and the second the coating layer are different.

5. The optical fiber as claimed in claim 4 wherein at least one of:
the first single ring marking and the second single ring marking are separated by a distance of 47.7 millimeters from inner ends, and
the first single ring marking and the second ring marking are separated by a distance of 52.2 millimeters from outer ends.

6. The optical fiber as claimed in claim 4 , wherein the first coating layer, the marking over the first coating layer and the second coating layer over the marking are applied over the optical fiber simultaneously.

7. The optical fiber as claimed in claim 4 , wherein at least one of:
the marking in between the first coating layer and the second layer facilitates in the reduction of the attenuation during temperature change,
the marking on the first coating layer allows the distribution of pressure on the first coating layer during the marking process which reduces the direct stress on the optical fiber.

8. The optical fiber as claimed in claim 3 , wherein at least one of: the first coating layer has a thickness in a range of 1.5 micron to 3 micron, the second coating layer has a thickness in a range of 1.5 micron to 3 micron.

9. The optical fiber as claimed in claim 3 wherein at least one of:
the first single ring marking has a width in a range of 2.3 millimeters to 2.5 millimeters;
the first part of the second single ring marking and the second part of the second single ring marking has a width in a range of 700 microns to 732 microns;
wherein the second single ring marking has a width in a range of 2.3 millimeters to 2.5 millimeters.

10. An optical fiber comprising:
a first double ring marking comprising a first ring marking and a second ring marking, a second double ring marking comprising a third ring marking and a fourth ring marking, each of the first ring marking, the second ring marking, the third ring marking and the fourth ring marking having a first part and a second part;
wherein the first double ring marking and the second double ring marking are between a first coating layer and a second coating layer of the optical fiber and are marked along a longitudinal length of the optical fiber; and

wherein at least one of:
the first ring marking and the second ring marking are separated by a distance of at least one of 3.395 millimeters and 3.146 millimeters from inner ends,
the first ring marking and the second ring marking are separated by a distance of 8.25 millimeters from outer ends;
the third ring marking and the fourth ring marking are separated by a distance of at least one of 3.395 millimeters and 3.146 millimeters from inner ends,
the third ring marking and the fourth ring marking are separated by a distance of 8.25 millimeters from outer ends;
the first ring marking and the fourth ring marking are separated by a distance of at least one of 58.25 millimeters and 58.32 millimeters from outer ends;
the second ring marking and the third ring marking are separated by a distance of at least one of 41.89 millimeters and 42.18 millimeters from inner ends.

Assignees

• Sterlite Tech Ltd

Inventors

• Sahoo Kishore Chandra
• Mishra Atul
• Rajsekar Vishnu
• Some Sashanka
• Kumar Sravan
• Gawande Parag
• Deshpande Mahesh
• Murthy Venkatesh

Classifications

• G02B6/4482 Primary

  Code or colour marking · CPC title