Optical fiber cable and cable with connector

Patent metadata

Field	Value
Publication number	US-2024019652-A1
Application number	US-202218252608-A
Country	US
Kind code	A1
Filing date	Jan 11, 2022
Priority date	Jan 12, 2021
Publication date	Jan 18, 2024
Grant date	—

Abstract

An optical fiber cable includes a central tensile strength member, a plurality of optical fibers disposed around the central tensile strength member, a set of tensile strength members arranged outside the plurality of optical fibers, and a sheath disposed outside the plurality of optical fibers, in which at least four sets of the tensile strength member are spaced apart from one another and embedded in the sheath.

First claim

What is claimed is:

1 . An optical fiber cable comprising:
a central tensile strength member; a plurality of optical fibers arranged around the central tensile strength member; a set of tensile strength members arranged outside the plurality of optical fibers; and a sheath disposed outside the plurality of optical fibers, wherein at least four sets of tensile strength members are spaced apart from one another and embedded in the sheath.

2 . The optical fiber cable according to claim 1 , wherein at least one of the central tensile strength member and the set of the tensile strength members includes aramid fiber reinforced plastic.

3 . The optical fiber cable according to claim 1 , wherein the central tensile strength member includes aramid fiber reinforced plastic and has a diameter of 3 mm or less.

4 . The optical fiber cable according to claim 1 , wherein the sheath includes 1.5% by mass or more of release agent.

5 . The optical fiber cable according to claim 1 , wherein the sheath includes a flame retardant inorganic material with an oxygen index of 50 or higher.

6 . The optical fiber cable according to claim 1 , wherein
the sheath includes an outer layer and an inner layer,
the inner layer includes a flame retardant inorganic material, and
the outer layer includes a release agent.

7 . The optical fiber cable according to claim 1 , wherein the plurality of optical fibers are in a form of optical fiber ribbons with adhesive parts and non-adhesive parts arranged in parallel in a direction orthogonal to the longitudinal direction, wherein, in some or all of the plurality of optical fibers, adhesive parts in a state in which adjacent optical fibers are connected to each other and non-adhesive parts in a state in which adjacent optical fibers are not connected to each other are provided intermittently in the longitudinal direction.

8 . The optical fiber cable according to claim 1 , wherein each of the plurality of optical fibers is a multi-core fiber.

9 . A cable with a connector comprising:
the optical fiber cable according to claim 1 ; and a multi-core connector attached to the plurality of optical fibers at one end of the optical fiber cable.

Assignees

• Sumitomo Electric Industries

Inventors

• Watanabe Akihisa
• Shimoda Yuuki
• Sato Fumiaki

Classifications

• G02B6/4434 Primary

  Central member to take up tensile loads · CPC title

• G02B6/02042

  Multicore optical fibres · CPC title

• G02B6/4403

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

• G02B6/3885

  Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type (optical ribbon cable G02B6/4403, G02B6/448) · CPC title

• G02B6/4432

  with fibre reinforcements · CPC title