Optical fiber

Patent metadata

Field	Value
Publication number	US-10162108-B2
Application number	US-201715717016-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Oct 3, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

An optical fiber includes an optical transmission medium having a core and a cladding, a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium, and a secondary resin layer coating the primary resin layer, wherein a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C., and the primary resin layer comprises a cured product of an ultraviolet light curable resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and a β-diketone compound, and tin.

First claim

What is claimed is:

1. An optical fiber comprising:
an optical transmission medium having a core and a cladding;
a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium; and
a secondary resin layer coating the primary resin layer,
wherein a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C., and
the primary resin layer comprises a cured product of an ultraviolet light curable resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and a β-diketone compound, and tin,
wherein the β-diketone compound is a compound selected from acetylacetone, acetoacetic acid, 2-acetoacetoxypropyl (meth)acrylate, 2-acetoacetoxybutyl (meth)acrylate, and 2,3-di(acetoacetoxy)propyl (meth)acrylate.

2. The optical fiber according to claim 1 , wherein 10 to 1000 ppm of the tin is contained in the primary resin layer.

3. The optical fiber according to claim 1 , wherein the Young's modulus of the primary resin layer is 0.25 MPa or less at 23° C.

4. The optical fiber according to claim 1 , wherein the β-diketone compound is contained in an amount of 0.01 to 10 parts by mass relative to a total amount of 100 parts by mass of the resin composition.

5. The optical fiber according to claim 1 , wherein the β-diketone compound is a compound having a polymerizable group.

Assignees

• Sumitomo Electric Industries

Inventors

• Homma Yuya
• Sohma Kazuyuki
• Shimada Kensaku

Classifications

• G02B6/03694

  Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties · CPC title

• G02B6/02395 Primary

  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

• C03C25/28 Primary

  obtained by reactions involving only carbon-to-carbon unsaturated bonds · CPC title

• C03C25/1065

  Multiple coatings · CPC title

• C03C25/105

  Organic claddings · CPC title