Optical fiber

Patent metadata

Field	Value
Publication number	US-9632241-B2
Application number	US-201414758322-A
Country	US
Kind code	B2
Filing date	Nov 7, 2014
Priority date	Nov 7, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

An optical fiber capable of achieving both of the ZSA property and the rapid curability is provided. The optical fiber includes a glass optical fiber 13 , a primary coating layer 16 that coats an outer periphery of the glass optical fiber 13 , and a secondary optical fiber 17 that coats an outer periphery of the primary coating layer 16 . Young's modulus of the primary coating layer 16 is 1.2 MPa or less and Young's modulus of the secondary coating layer 17 is 800 MPa or more. Sulfur content of the surface of the glass optical fiber 13 is 0.2% by atom or more. Sulfur is not present in the vicinity of the outer periphery of the primary coating layer 16.

First claim

The invention claimed is:

1. An optical fiber comprising:
a glass optical fiber;
a primary coating layer that coats an outer periphery of the glass optical fiber; and
a secondary coating layer that coats an outer periphery of the primary coating layer, wherein
Young's modulus of the primary coating layer is 0.1 MPa-0.8 MPa and Young's modulus of the secondary coating layer is 800 MPa-1800 MPa,
sulfur content of the surface of the glass optical fiber which has been exposed after removing the primary coating layer is 0.2%-0.5% by atom,
sulfur is not present in the vicinity of the outer periphery of the primary coating layer,
a resin composition comprising the primary coating layer contains nonylphenyl acrylate, N-vinyl-caprolactam and a silane coupling agent having a mercapto group, and
wherein content of the silane coupling agent in the resin composition is 0.5%-3.0% by mass.

2. The optical fiber according to claim 1 , wherein unreacted ingredient(s) extracted after immersion in methyl ethyl ketone (MEK) at 60° C. for 17 hours is less than 15%.

Assignees

• Sumitomo Electric Industries

Inventors

• Iwaguchi Noriaki
• Iida Masuo
• Tachibana Kumiko
• Fujii Takashi

Classifications

• C03C25/40

  Organo-silicon compounds · CPC title

• C03C13/045

  Silica-containing oxide glass compositions · 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

• C03C25/1065

  Multiple coatings · CPC title