Coated optical fiber

Patent metadata

Field	Value
Publication number	US-9557477-B2
Application number	US-201313923843-A
Country	US
Kind code	B2
Filing date	Jun 21, 2013
Priority date	Jun 22, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A coated glass fiber 1 comprising a glass fiber 10 and one or more coating layers each composed of an ultraviolet curable resin on the outer circumference of the glass fiber 10 , wherein the ultraviolet curable resin constituting at least one of the coating layers is formed of an ultraviolet curable coating material containing a silane coupling agent and a photoacid generator. The coated optical fiber 1 coated optical fiber having a high dynamic fatigue coefficient since adhesion between the surface of the glass fiber and the resin coating layer is satisfactory.

First claim

What is claimed is:

1. A coated optical fiber comprising a glass fiber and one or more coating layers each composed of a cured ultraviolet curable resin on the outer circumference of the glass fiber,
wherein the ultraviolet curable resin from which at least one of the coating layers is formed comprises an ultraviolet curable coating material containing a silane coupling agent and a photoacid generator
wherein pH of each of the one or more coating layers is 5 or lower.

2. The coated optical fiber according to claim 1 , wherein the content of the photoacid generator in the ultraviolet curable coating material is from 0.25 to 3% by weight.

3. The coated optical fiber according to claim 1 , wherein pullout force for pulling out the glass fiber each of the one or more coating layers is 0.5 kg or more and 1.5 kg or less.

4. The coated optical fiber according to claim 1 , wherein an increase in transmission loss when it is placed at −40° C. for 2 hours is 0.03 dB/km or less.

5. The coated optical fiber according to claim 1 , wherein the content of the photoacid generator in the ultraviolet curable coating material is from 0.25 to 2.5% by weight.

6. The coated optical fiber according to claim 1 , wherein the content of the photoacid generator in the ultraviolet curable coating material is from 0.25 to 2.5% by weight and an increase in transmission loss when the fiber is placed at −40° C. for 2 hours is 0.03 dB/km or less.

7. The coated optical fiber according to claim 1 , wherein the coating layer includes an inner layer coming into contact with the glass fiber and an outer layer on the outer circumference thereof and the inner layer is formed of the ultraviolet curable coating material.

Assignees

• Sumitomo Electric Industries

Inventors

• Tachibana Kumiko
• Fujii Takashi
• Takada Takashi
• Iwaguchi Noriaki

Classifications

• 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

• C03C25/1055

  Chemistry & Metallurgy · mapped topic

• C03C25/326

  Polyureas; Polyurethanes · CPC title

• C03C25/106

  Single coatings · CPC title

• C03C25/1065

  Multiple coatings · CPC title