Optical fiber
AssigneeFurukawa Electric Co., Ltd.
InventorsYasuo NAKAJIMA, Kouji Mochizuki, Hiroki Tanaka
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Abstract
An optical fiber which reduces transmission loss increase even in a high humidity environment or under water is provided. To solve the above issue, an optical fiber according to the present invention comprises a glass optical fiber coated with at least two coating layers, soft and hard layers. The optical fiber is further coated by a colored resin to make a colored optical fiber. The hard layer and the color layer of the colored optical fiber have a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
Claims9
An optical fiber comprising:
- a glass optical fiber coated with at least two layers, soft and hard layers, wherein the hard layer has a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
A colored optical fiber comprising:
- an optical fiber having a glass optical fiber coated with at least two layers, soft and hard layers, wherein the hard layer has a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy;
- and
- a coating layer made from a colored resin and coated onto the optical fiber, wherein the coating layer made from the colored resin has a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
An optical fiber ribbon comprising:
- two or more of colored optical fibers are laid in parallel to one another in a linear array and held together by a ribbon resin,
- wherein the colored optical fiber has a glass optical fiber coated with at least two layers, soft and hard layers, wherein the hard layer has a coloring agent and a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
An optical fiber ribbon comprising:
- two or more of colored optical fibers are laid in parallel to one another in a linear array and held together by a ribbon resin,
- wherein the colored optical fiber having a glass optical fiber coated with at least two layers, soft and hard layers, and the hard layer has a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy, and a coating layer made from a colored resin, wherein the coating layer made from the colored resin has a free volume radius of at least 0.290 nm according to positron annihilation lifetime spectroscopy.
Dependencies are inferred from the claim text.