Optical fiber cable

Patent metadata

Field	Value
Publication number	US-10101549-B2
Application number	US-201515510454-A
Country	US
Kind code	B2
Filing date	Jan 13, 2015
Priority date	Sep 17, 2014
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

Optical fiber ribbons each comprise a plurality of optical fiber strands bonded in parallel. In the optical fiber ribbons, adjacent optical fiber strands are bonded by bonding sections that are intermittently bonded at prescribed intervals. The positions of the bonding section for all optical fiber ribbons are mutually offset in the longitudinal direction. In other words, the longitudinal-direction positions of the bonding section for the optical fiber ribbons never exactly match.

First claim

What is claimed is:

1. An optical fiber cable comprising:
a plurality of optical fiber ribbons which are to be accommodated in the optical fiber cable; and
a coat layer that protects a plurality of the optical fiber ribbons, wherein:
each of the optical fiber ribbons is formed such that a plurality of optical fiber strands are arranged in parallel and integrated;
adjacent optical fiber strands are bonded intermittently with each other along the longitudinal direction of the optical fiber strands; and
positions, in the longitudinal direction, of corresponding bonding sections in adjacent optical fiber ribbons, are shifted with respect to each other.

2. The optical fiber cable according to claim 1 , wherein
an end position of any one of bonding sections of a standard optical fiber ribbon, which is arbitrarily selected from a plurality of the optical fiber ribbons, is called as a standard bonding-section position and, for each of the other optical fiber ribbons, the end position of a bonding section that is closest to the standard bonding-section position in the longitudinal direction of the optical fiber cable is called as a bonding-section position respectively; and
each shifting amount between two bonding-section positions, including the standard bonding-section position and all the respective bonding-section positions, is greater than or equal to half the length of the bonding section in the longitudinal direction of the optical fiber cable.

3. The optical fiber cable according to claim 1 , wherein
the positions of the bonding sections of at least one pair of the optical fiber ribbons do not overlap with each other in the longitudinal direction of the optical fiber.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Hoshino Yutaka
• Okada Noboru

Classifications

• G02B6/4403 Primary

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

• G02B6/443

  Protective covering · CPC title

• G02B6/441

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