Optical fiber ribbon and optical fiber cable

Patent metadata

Field	Value
Publication number	US-9541722-B2
Application number	US-201414889058-A
Country	US
Kind code	B2
Filing date	Apr 28, 2014
Priority date	May 7, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel spaced from each other; and a tape forming member having a coating portion covering an outer circumference of the optical fiber cores, and a coupling portion, integrally formed with the coating portion, intermittently coupling adjacent optical fiber cores, wherein the coating portion has an opening portion to expose a part of surfaces of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

First claim

The invention claimed is:

1. An optical fiber ribbon comprising:
a plurality of optical fiber cores arranged in parallel spaced from each other; and
a tape forming member having coating portions covering each outer circumference of the optical fiber cores, spaced each other, and a coupling portion, integrally formed with the coating portion, intermittently coupling the coating portions each covering adjacent optical fiber cores,
wherein each thickness of the coupling portions is less than each thickness of the optical fiber cores including the coating portions, and
each of the coating portions has an opening portion to expose a part of a surface of only a respective one of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

2. The optical fiber ribbon of claim 1 , wherein each thickness of the coupling portions is less than each diameter of the optical fiber cores.

3. The optical fiber ribbon of claim 1 , wherein each thickness of the coupling portions is 1 μm to 120 μm.

4. The optical fiber ribbon of claim 1 , wherein each of the coupling portions are formed between the optical fiber cores.

5. The optical fiber ribbon of claim 1 , wherein the opening portions per each single core of the optical fiber cores are formed at least one for each 5 cm in the longitudinal direction.

6. The optical fiber ribbon of claim 1 , wherein the tape forming member is formed by an ultraviolet curing resin.

7. The optical fiber ribbon of claim 1 , wherein each cross-section exposing angle of the opening portions are 15° or more, and 270° or less.

8. An optical fiber cable implementing an optical fiber ribbon, the optical fiber ribbon comprising:
a plurality of optical fiber cores arranged in parallel spaced from each other; and
a tape forming member having coating portions covering each outer circumference of the optical fiber cores, spaced each other, and a coupling portion, integrally formed with the coating portion, intermittently coupling the coating portions each covering adjacent optical fiber cores,
wherein each thickness of the coupling portions is less than each thickness of the optical fiber cores including the coating portions, and
each of the coating portions has an opening portion to expose a part of a surface of only a respective one of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

9. The optical fiber cable of claim 8 , wherein each thickness of the coupling portions is less than each diameter of the optical fiber cores.

10. The optical fiber cable of claim 8 , wherein each thickness of the coupling portions is 1 μm to 120 μm.

11. The optical fiber cable of claim 8 , wherein each of the coupling portions are formed between the optical fiber cores.

12. The optical fiber cable of claim 8 , wherein the opening portions per each single core of the optical fiber cores are formed at least one for each 5 cm in the longitudinal direction.

13. The optical fiber cable of claim 8 , wherein the tape forming member is formed by an ultraviolet curing resin.

14. The optical fiber cable of claim 8 , wherein each cross-section exposing angle of the opening portions are 15° or more, and 270° or less.

Assignees

• Fujikura Ltd
• Nippon Telegraph & Telephone

Inventors

• Sajima Yoshie
• Matsuzawa Takashi
• Isaji Mizuki
• Osato Ken
• Okada Naoki
• Nakane Hisaaki
• Yamada Yusuke
• Kakuta Daisuke
• Hamaguchi Shinya
• Shibata Yukihiko

Classifications

• G02B6/4498

  Physics · mapped topic

• G02B6/4404 Primary

  Multi-podded · CPC title

• G02B6/4495

  Physics · mapped topic

• G02B6/567

  for ribbon cables · CPC title

• G02B6/4431 Primary

  with provision in the protective covering, e.g. weak line, for gaining access to one or more fibres, e.g. for branching or tapping (break-out terminations G02B6/4471) · CPC title