OPTICAL FIBER CORE AND OPTICAL FIBER TAPE CORE

• US 20170184785A1
• Filed: 12/02/2015
• Published: 06/29/2017
• Est. Priority Date: 12/03/2014
• Status: Active Grant

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: TACHIBANA, Kumiko, IWAGUCHI, Noriaki, FUJII, Takashi
• Granted Patent: US 9,964,700 B2
• Time in Patent Office: Days
• CPC Class Codes: C03C 25/1065 Multiple coatings
• CPC Class Codes: C03C 25/475 containing colouring agents
• CPC Class Codes: G02B 6/02395 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 Class Codes: G02B 6/4403 with ribbon structure G02B6/4429, G02B6/4439, G02B6/4479 take precedence

Abstract

An optical fiber comprises a glass fiber, and a coating resin layer with which the glass fiber is covered, the coating resin layer has a plurality of layers, the plurality of layers includes a first layer being in contact with the glass fiber, and a longest diameter at −40° C. of a void formed in the first layer is 100% or more and 300% or less of a longest diameter at 23° C. thereof, or a longest diameter at −40° C. of a void formed in the first layer is 100% or more and 600% or less of a longest diameter at 23° C. thereof, and a Young'"'"'s modulus of the first layer is 0.3 MPa or less.

Claims

1. :

An optical fiber comprising a glass fiber and a coating resin layer with which the glass fiber is covered;

the coating resin layer having a plurality of layers, and

the plurality of layers including a first layer being in contact with the glass fiber, wherein a longest diameter at −

40°

C. of a void formed in the first layer is 100% or more and 300% or less of a longest diameter at 23°

C. thereof.

2. :

The optical fiber according to claim 1, wherein a Young'"'"'s modulus of the first layer is 0.8 MPa or less at room temperature.

4. :

The optical fiber according to claim 1, wherein an increment of a transmission loss at −

40°

C. relative to a transmission loss at 23°

C. is 0.05 dB/km or less.

5. :

The optical fiber according to claim 1, wherein the coating resin layer has a colored layer of a thickness with 10 μ

m or more.

6. :

The optical fiber according to claim 5, wherein the colored layer contains a titanium element.

7. :

The optical fiber according to claim 1, wherein the coating resin layer includes two layers, the first layer and a second layer in contact with the first layer, and the second layer is colored.

8. :

An optical fiber ribbon in which a plurality of the optical fibers according to claim 5 are in parallel and covered with a ribbon material.

3. :

An optical fiber comprising a glass fiber and a coating resin layer with which the glass fiber is covered;

the coating resin layer having a plurality of layers, and

the plurality of layers including a first layer being in contact with the glass fiber, wherein a longest diameter at −

40°

C. of a void formed in the first layer is 100% or more and 600% or less of a longest diameter at 23°

C. thereof, and a Young'"'"'s modulus of the first layer is 0.3 MPa or less.

9. :

The optical fiber according to claim 3, wherein an increment of a transmission loss at −

40°

C. relative to a transmission loss at 23°

C. is 0.05 dB/km or less.

10. :

The optical fiber according to claim 3, wherein the coating resin layer has a colored layer of a thickness with 10 μ

m or more.

11. :

The optical fiber according to claim 10, wherein the colored layer contains a titanium element.

12. :

The optical fiber according to claim 3, wherein the coating resin layer includes two layers, the first layer and a second layer in contact with the first layer, and the second layer is colored.

13. :

An optical fiber ribbon in which a plurality of the optical fibers according to claim 10 are in parallel and covered with a ribbon material.