Optical fiber structure and method of manufacturing same

• US 20070081774A1
• Filed: 03/09/2006
• Published: 04/12/2007
• Est. Priority Date: 03/23/2005
• Status: Active Grant

• Current Assignee: Tomoegawa Paper Company Limited
• Original Assignee: Tomoegawa Paper Company Limited
• Inventors: Sukegawa, Ken, Sasaki, Kyoichi, Suzuki, Masayoshi
• Granted Patent: US 7,509,009 B2
• Time in Patent Office: Days
• US Class Current: 385/109
• CPC Class Codes: G02B 6/4404 Multi-podded
• CPC Class Codes: G02B 6/443 Protective covering
• CPC Class Codes: G02B 6/448 Ribbon cables

Abstract

The present invention provides an optical fiber structure that allows for reliable and easy branching of optical fibers, as well as a method of manufacturing such optical fiber structure. The optical fiber structure proposed by the present invention is characterized by a structure wherein multiple optical fiber units, each comprising multiple optical fibers that are aligned two-dimensionally in such a way that one side is covered by a first covering body, are aligned so that the covered surfaces face the same direction, and the covered or uncovered surfaces of the multiple optical fiber units are integrally covered by a second covering body. The second covering body should preferably be made of silicone rubber having a tearing strength of 29 kgf/cm or below.

Claims

1. An optical fiber structure characterized by comprising a structure wherein multiple optical fiber units, each comprising multiple optical fiber core wires that are aligned two-dimensionally and have one side covered by a first covering body, are aligned wherein the covered surfaces face the same direction, and the covered or uncovered surfaces of the multiple optical fiber units are integrally covered by a second covering body.

2. The optical fiber structure according to claim 1, characterized in that the second covering body that covers the multiple optical fiber units has a tearing strength of 29 kgf/cm or below.

3. The optical fiber structure according to claim 1, characterized in that the first covering body and the second covering body are made of the same type or different types of silicone rubber.

4. The optical fiber structure according to claim 1, characterized in that the alignment order of the optical fiber units is changed.

5. The optical fiber structure according to claim 1, characterized in that the alignment order of the optical fiber core wires is changed in the optical fiber units.

6. The optical fiber structure according to claim 1, characterized in that at least one of the multiple optical fiber units is branched.

7. The optical fiber structure according to claim 6, characterized in that the branching section of the branched optical fiber unit is affixed by means of an affixing member.

8. The optical fiber structure according to claim 1, characterized in that a group of single optical fiber core wires comprising single core wires branching from optical fiber core wires are formed at the end of the optical fiber structure.

9. The optical fiber structure according to claim 8, characterized in that each of the branched single optical fiber core wires is guided through a cylindrical tube and said cylindrical tube is affixed at the end of the optical fiber structure.

19. The optical fiber structure according to claim 4, characterized in that the alignment order of the optical fiber core wires is changed in the optical fiber units.

10. A method of manufacturing optical fiber structure characterized by comprising:

a step in which multiple optical fiber units, each comprising multiple optical fiber core wires that are aligned and have one side covered by a first covering body, are aligned and placed on a plane so that the covered surfaces face the same direction; and

a step in which the covered or uncovered surfaces of the multiple optical fiber units are covered by a second covering body to integrate the multiple optical fiber units.

11. The method of manufacturing optical fiber structure according to claim 10, characterized in that the second covering body that covers the multiple optical fiber units has a tearing strength of 29 kgf/cm or below.

12. The method of manufacturing optical fiber structure according to claim 10, characterized in that the first covering body and the second covering body are made of the same type or different types of silicone rubber.

13. The method of manufacturing optical fiber structure according to claim 10, characterized in that, in the step in which the multiple optical fiber units are aligned and placed so that the covered surfaces face the same direction, the alignment order of the multiple optical fiber units is rearranged and placed in such a way that the multiple optical fiber units are at least partially crossed.

14. The method of manufacturing optical fiber structure according to claim 10, characterized in that the multiple optical fiber core wires in one or more of the optical fiber units are partially crossed and aligned in a different alignment order.

15. The method of manufacturing optical fiber structure according to claim 10, characterized in that the covered or uncovered surfaces of the multiple optical fiber units are covered by the second covering body, and then said multiple optical fiber units are partially torn and branched.

16. The method of manufacturing optical fiber structure according to claim 15, characterized in that, after the multiple optical fiber units are partially torn and branched, the branching section of the branched optical fiber units are affixed by means of an affixing member.

17. The method of manufacturing optical fiber structure according to claim 10, characterized in that a group of single optical fiber core wires comprising single core wires branching from optical fiber core wires are formed at the end of the optical fiber unit.

18. The method of manufacturing optical fiber structure according to claim 17, characterized in that each of the branched single optical fiber core wires is guided through a cylindrical rube.

20. The method of manufacturing optical fiber structure according to claim 13, characterized in that the multiple optical fiber core wires in one or more of the optical fiber units are partially crossed and aligned in a different alignment order.