Optical fiber cable

Patent metadata

Field	Value
Publication number	US-10345516-B2
Application number	US-201515301995-A
Country	US
Kind code	B2
Filing date	Apr 28, 2015
Priority date	May 9, 2014
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

[Solution] An optical fiber cable includes: a plurality of optical fiber units each including a plurality of optical fibers and a bundling member wound around an outer periphery of a bundle of the plurality of optical fibers, the bundling member having a surface to which a water-absorbent granular substance is detachably attached.

First claim

The invention claimed is:

1. An optical fiber cable comprising:
a plurality of optical fiber units each including
a plurality of optical fibers and
a bundling member wound around an outer periphery of a bundle of the plurality of optical fibers,

wherein the bundling member having a surface on a side not contacting the outer periphery of the bundle of the optical fibers and on another side contacting the outer periphery of the bundle of the optical fibers, the surface on both the side and the another side is detachably attached with a water-absorbent granular substance, and
wherein the bundling member including a core portion and a cladding portion provided to coat the core portion, the cladding portion being configured with a member having a melting point lower than a melting point of the core portion.

2. An optical fiber cable according to claim 1 , wherein
at least one of the optical fiber units includes an optical fiber ribbon, the optical fiber ribbon being configured with optical fibers arranged in a parallel manner, the optical fibers included in the plurality of optical fibers, the optical fiber ribbon having connecting portions intermittently arranged in a longitudinal direction and a width direction in the optical fiber ribbon, the connecting portions connecting each two optical fibers immediately adjacent to each other in the optical fibers.

3. An optical fiber cable according to claim 1 , wherein
a plurality of bundling members is wound around the outer periphery of the bundle of the optical fibers, the bundling member including the plurality of bundling members.

4. An optical fiber cable according to claim 1 , wherein
at least one of the optical fiber units includes at least 500 of the optical fibers.

5. An optical fiber cable according to claim 1 , wherein
a rate of a volume of the bundling member after absorbing moisture to a volume of the bundling member before absorbing moisture is equal to or more than 3.

6. An optical fiber cable comprising:
a plurality of optical fiber units each including
a plurality of optical fibers, and
at least one of a plurality of bundling members wound around an outer periphery of a bundle of the plurality of optical fibers,

wherein the at least one of the bundling members having a surface detachably attached with a water-absorbent granular substance,
wherein the plurality of optical fiber units including two or more optical fiber units adjacent to each other that are disposed to contact each other with the at least one of the bundling members therebetween,
wherein the at least one of the bundling members including a core portion and a cladding portion provided to coat the core portion, the cladding portion being configured with a member having a melting point lower than a melting point of the core portion, the cladding portion having a surface attached with the water-absorbent granular substance,
the plurality of the bundling members being would around the outer periphery of the bundle of optical fibers, the bundling members including two bundling members being joined to each other by heat-sealing.

Assignees

• Fujikura Ltd
• Nippon Telegraph & Telephone

Inventors

• Sajima Yoshie
• Tomikawa Kouji
• Osato Ken
• Yamanaka Masayoshi
• Okada Naoki
• Hamaguchi Shinya
• Nakagawa Naoki
• Yamada Yusuke
• Nakane Hisaaki

Classifications

• G02B6/4432

  with fibre reinforcements · CPC title

• G02B6/441 Primary

  built up from sub-bundles (G02B6/4429, G02B6/4439, G02B6/4479 take precedence) · CPC title

• G02B6/04 Primary

  formed by bundles of fibres (G02B6/24 takes precedence) · CPC title

• G02B6/4482

  Code or colour marking · CPC title

• G02B6/4494

  Physics · mapped topic