OPTICAL FIBER
First Claim
1. A colored optical fiber comprising:
- an optical fiber having at least a double-layered coating layer of a soft layer and a hard layer and a glass optical fiber coated with the coating layer; and
a colored layer which coats the optical fiber and which is formed by being applied to the optical fiber, whereina coating layer of the colored optical fiber is formed by the coating layer and the colored layer, anda ratio of thermal expansion coefficient of the coating layer of the colored optical fiber after the colored layer is applied relative to the thermal expansion coefficient of the coating layer of the optical fiber before the colored layer is applied is 0.87 or more.
1 Assignment
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Accused Products
Abstract
The present invention provides an optical fiber in which the transmission loss increase is suppressed even under a high-humidity condition or under a water-immersed condition. A colored optical fiber (22) according to an embodiment of the present invention is a colored optical fiber (22) formed by applying a colored layer to an optical fiber (14) including a glass optical fiber coated with at least a double-layered coating layer of a soft layer and a hard layer, and the ratio of thermal expansion coefficient between the coating layer after the colored layer of the colored optical fiber (22) is applied and the coating layer of the optical fiber (14) before the colored layer is applied is 0.87 or more. Furthermore, an optical fiber ribbon (32) according to another embodiment of the present invention is an optical fiber (32) formed by arranging a plurality of the colored optical fiber (22) in the form of a plane and coating them all together with a ribbon resin and the ratio of thermal expansion coefficient between the coating layer after the colored layer of the colored optical fiber (22) is applied and the coating layer of the optical fiber before the colored layer is applied is 0.90 or more.
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Citations
2 Claims
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1. A colored optical fiber comprising:
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an optical fiber having at least a double-layered coating layer of a soft layer and a hard layer and a glass optical fiber coated with the coating layer; and a colored layer which coats the optical fiber and which is formed by being applied to the optical fiber, wherein a coating layer of the colored optical fiber is formed by the coating layer and the colored layer, and a ratio of thermal expansion coefficient of the coating layer of the colored optical fiber after the colored layer is applied relative to the thermal expansion coefficient of the coating layer of the optical fiber before the colored layer is applied is 0.87 or more. - View Dependent Claims (2)
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Specification