Multi-core optical fiber, optical cable, and optical connector

Patent metadata

Field	Value
Publication number	US-10139559-B2
Application number	US-201715639355-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Oct 22, 2014
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

An MCF of the present embodiment has eight or more cores. A diameter of a common cladding is not more than 126 μm. Optical characteristics of each core are as follows: a TL at a predetermined wavelength of 1310 nm is not more than 0.4 dB/km; an MFD at the predetermined wavelength is from 8.0 μm to 10.1 μm; a BL in a BR of not less than 5 mm or in the BR of not less than 3 mm and, less than 5 mm is not more than 0.25 dB/turn at the predetermined wavelength; λ0 is from 1300 nm to 1324 nm; λcc is not more than 1260 nm; an XT or XTs at the predetermined wavelength is not more than 0.001/km.

First claim

The invention claimed is:

1. An optical connector comprising: a resin ferrule; and four or more multi-core optical fibers linearly arrayed in the ferrule,
wherein each of the multi-core optical fibers has a common cladding with a diameter of 124 to 126 μm, and two or more cores,
wherein in each of the multi-core optical fibers, an outmost core is arranged so that a distance between a core center of the outmost core out of the two or more cores and a center of a cross section of the common cladding is not more than 45 μm,
wherein projection amounts of end faces of the respective multi-core optical fibers from an end face of the ferrule are not less than 2 μm, and a variation of the projection amounts among the multi-core optical fibers is not more than 0.3 μm, and among the four or more multi-core optical fibers, multi-core optical fibers located at both ends of the array have projection amounts smaller than that of any one of remaining multi-core optical fibers, and
wherein the end faces projecting from the end face of the ferrule are polished.

Assignees

• Sumitomo Electric Industries

Inventors

• Hayashi Tetsuya
• Shimakawa Osamu

Classifications

• G02B6/02395

  Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture (G02B6/02052, G02B6/02057, G02B6/024, G02B6/032, G02B6/105, G02B6/14 take precedence; coating on fibre gratings G02B6/02104; multilayer core or cladding G02B6/036; reinforcing splice joints G02B6/2558; optical cables, i.e. comprising protective structures external to the protective coating such as a jacket or plural coated optical fibres G02B6/44; coating of glass to obtain optical fibres C03C25/104) · CPC title

• G02B6/02004

  characterised by the core effective area or mode field radius · CPC title

• G02B6/02042 Primary

  Multicore optical fibres · CPC title

• G02B6/0365

  arranged - - + · 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