Optical fiber cable and optical fiber cable connection system

Patent metadata

Field	Value
Publication number	US-2025044539-A1
Application number	US-202118716605-A
Country	US
Kind code	A1
Filing date	Dec 10, 2021
Priority date	Dec 10, 2021
Publication date	Feb 6, 2025
Grant date	—

Abstract

An optical fiber cable according to an aspect of the present disclosure includes a plurality of optical fibers each of which includes a core portion, a clad portion covering a periphery of the core portion, and a coating portion covering a periphery of the clad portion, and a cable sheath which accommodates the plurality of optical fibers, in which a multi-fiber connector capable of connecting the plurality of optical fibers with 24 or more fibers is arranged at one end of the plurality of optical fibers, and a density of the plurality of optical fibers in the optical fiber cable is 6.5 fibers/mm 2 or more and 9.0 fibers/mm 2 or less.

First claim

What is claimed is:

1 . An optical fiber cable comprising:
a plurality of optical fibers each of which includes a core portion, a clad portion covering a periphery of the core portion, and a coating portion covering a periphery of the clad portion; and a cable sheath which accommodates the plurality of optical fibers, wherein a multi-fiber connector capable of connecting the plurality of optical fibers with 24 or more fibers is arranged at one end of the plurality of optical fibers, and wherein a density of the plurality of optical fibers in the optical fiber cable is 6.5 fibers/mm 2 or more and 9.0 fibers/mm 2 or less.

2 . The optical fiber cable according to claim 1 ,
wherein the plurality of optical fibers of 1728 fibers or more are accommodated inside the cable sheath.

3 . The optical fiber cable according to claim 1 ,
wherein an outer diameter of the plurality of optical fibers is less than 200 μm.

4 . The optical fiber cable according to claim 1 ,
wherein a fluctuation range of an outer diameter of the clad portion is +0.5 μm or less.

5 . The optical fiber cable according to claim 1 ,
wherein silicone is added to the cable sheath.

6 . The optical fiber cable according to claim 1 ,
wherein inside the cable sheath, the plurality of optical fibers are bundled into a plurality of subunits, and wherein outer circumferences of the plurality of subunits are coated with a subunit coating portion containing a flame retardant material.

7 . The optical fiber cable according to claim 6 ,
wherein a coating thickness of the subunit coating portion is between 0.05 mm and 0.5 mm.

8 . The optical fiber cable according to claim 6 ,
wherein the coating portion of the plurality of optical fibers forming the subunit contains a flame retardant material.

9 . The optical fiber cable according to claim 1 ,
wherein the number of the plurality of optical fibers that can be connected by the multi-fiber connector are 96 fibers or more.

10 . The optical fiber cable according to claim 1 ,
wherein a protection tube accommodating the multi-fiber connector is provided at the end of the optical fiber cable, and wherein an outer diameter of the protection tube is less than the outer diameter of the optical fiber cable excluding the protection tube +2 mm.

11 . An optical fiber cable connection system which connects an optical fiber cable according to claim 1 with an indoor optical fiber cable having a multi-fiber connector with 24 or more fibers at one end,
wherein a connection portion between the optical fiber cable and the indoor optical fiber cable is covered by a junction box.

Assignees

• Sumitomo Electric Industries

Inventors

• Sato Fumiaki
• Shimoda Yuuki
• Shimazu Takayuki
• YOKOCHI Takayuki

Classifications

• G02B6/4436 Primary

  Heat resistant · CPC title

• G02B6/44 Primary

  Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables (cables incorporating electric conductors and optical fibres {where features relating to the optical fibres are not of interest} H01B11/22) · CPC title

• G02B6/40

  having fibre bundle mating means · CPC title