Resin liquid for optical fiber coating layer
AssigneeFujikura Ltd.
InventorsKeiko Mitsuhashi, Tsuyoshi Shimomichi, Keiji Ohashi
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Abstract
A resin liquid is provided which is used to produce an optical fiber coating layer which does not degrade over time in long-period transmission characteristics of the optical fiber. An optical fiber in which long-period transmission characteristics do not degrade is also provided. In order to achieve these objects, the present invention provides a resin liquid for an optical fiber coating layer containing at least one resin, wherein the resin liquid contains fewer than 500 pieces of extraneous material per 1 ml of the resin liquid, which have a minimum length of 0.5 μm or more and a hardness greater than a hardness of the resin liquid after curing.
Claims12
A resin liquid for an optical fiber coating layer for improving long-period transmission properties of an optical fiber which comprises a naked optical fiber and a coating layer, wherein the coating layer comprises a first coating layer which is directly coated onto the naked optical fiber and a second coating layer which is coated onto the first coating layer,
- the resin liquid containing at least one resin, wherein the resin liquid contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, the extraneous material has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the resin liquid after curing, and the resin liquid is used for forming at least the first coating layer, and wherein the first coating layer has a Young's modulus in a range from 0.3 to 10 MPa and contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, and the extraneous material has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the first coating layer.
A resin liquid for an optical fiber coating layer, for improving long-period transmission properties of an optical fiber which comprises a naked optical fiber and a coating layer, wherein the coating layer comprises a first coating layer which is directly coated onto the naked optical fiber and a second coating layer which is coated onto the first coating layer,
- the resin liquid containing at least one resin, wherein the resin liquid contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, the extraneous material has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the resin liquid after curing, and the resin liquid is used for forming at least the first coating layer, and wherein the second coating layer has a Young's modulus in a range from 100 to 2,000 MPa and contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, the extraneous material having a minimum length of 0.5 μm or more and a hardness greater than a hardness of the second coating layer.
An optical fiber, comprising a naked optical fiber and a coating layer on the naked optical fiber,
- wherein the coating layer comprises a first coating layer which is directly coated onto the naked optical fiber and a second coating layer which is coated onto the first coating layer, wherein the first coating layer is obtainable by coating a resin liquid for an optical fiber coating layer for improving long-period transmission properties of an optical fiber onto the naked optical fiber and curing the resin liquid and has a Young's modulus in a range from 0.3 to 10 MPa, and wherein the resin liquid contains at least one resin and less than 500 pieces of extraneous material per 1 ml of the resin liquid, and the extraneous material has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the first coating layer.
An optical fiber comprising a naked optical fiber and a coating layer on the naked optical fiber,
- wherein the coating layer comprises a first coating layer which is directly coated onto the naked optical fiber and a second coating layer which is coated onto the first coating layer, wherein the second coating layer is obtainable by coating a resin liquid for an optical fiber coating layer for improving long-period transmission properties of an optical fiber onto the first coating layer and curing the resin liquid and has a Young's modulus in a range from 100 to 2,000 MPa, and wherein the resin liquid contains at least one resin and less than 500 pieces of extraneous material per 1 ml of the resin liquid, and the extraneous material has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the second coating layer.
A resin liquid for an optical fiber coating layer for improving long-period transmission properties of an optical fiber which comprises a naked optical fiber and a coating layer which comprises a first coating layer which is directly coated onto the naked optical fiber and a second coating layer which is coated onto the first coating layer,
- the resin liquid containing at least one resin, wherein the resin liquid contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, the extraneous material having a minimum length of 0.5 μm or more and a hardness greater than a hardness of the resin liquid after curing, the resin liquid is used for forming both the first coating layer and the second coating layer, the first coating layer has a Young's modulus in a range from 0.3 to 10 MPa and contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, the extraneous material in the first coating layer has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the first coating layer, the second coating layer has a Young's modulus in a range from 100 to 2,000 MPa and contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, and the extraneous material in the second coating layer has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the second coating layer.
An optical fiber comprising a naked optical fiber and a coating layer on the naked optical fiber,
- wherein the coating layer comprises a first coating layer which is directly coated onto the naked optical fiber and a second coating layer which is coated onto the first coating layer, the first coating layer is obtainable by coating a resin liquid for an optical fiber coating layer for improving long-period transmission properties of an optical fiber onto the naked optical fiber and curing the resin liquid and has a Young's modulus in a range from 0.3 to 10 MPa, the resin liquid for the first coating layer contains at least one resin and contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, the extraneous material in the resin liquid for the first coating layer has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the first coating layer, the second coating layer is obtainable by coating a resin liquid for an optical fiber coating layer for improving long-period transmission properties of an optical fiber onto the first coating layer and curing the resin liquid and has a Young's modulus in a range from 100 to 2,000 MPa, the resin liquid for the second coating layer contains at least one resin and contains less than 500 pieces of extraneous material per 1 ml of the resin liquid, and the extraneous material in the resin liquid for the second coating layer has a minimum length of 0.5 μm or more and a hardness greater than a hardness of the second coating layer.
Dependencies are inferred from the claim text.