Abstract: An optical fiber includes an optical transmission medium comprising a core and a cladding; a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium; and a secondary resin layer coating the primary resin layer, and 1.1 ppm or less of a phosphorus compound and 2.5% by mass or less of a phenol compound based on the total amount of the primary resin layer are contained in the primary resin layer.

Abstract: An optical fiber comprising: a glass fiber including a core and a cladding; and a coating layer coating an outer periphery of the glass fiber; wherein the coating layer includes a primary coating layer and a secondary coating layer, and a hardness at a depth of 200 nm from a surface of the secondary coating layer, HIT-200 nm, is 0.02 to 0.20 GPa as measured with a nano indenter.

Abstract: An optical fiber includes an optical transmission medium having a core and a cladding, a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium, and a secondary resin layer coating the primary resin layer, wherein a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C., and the primary resin layer comprises a cured product of an ultraviolet light curable resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and a ?-diketone compound, and tin.

Abstract: An optical fiber includes an optical transmission medium having a core and a cladding; a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium; and a secondary resin layer coating the primary resin layer, wherein the primary resin layer comprises a cured product of an ultraviolet light curable resin composition comprising a urethane (meth)acrylate oligomer, a monomer and a photopolymerization initiator, and a compound containing phosphorus and tin as constituent atoms; and a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C.

Abstract: An optical fiber includes an optical transmission medium having a core and a cladding; a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium; and a secondary resin layer coating the primary resin layer, wherein the primary resin layer comprises a cured product of an ultraviolet light curable resin composition comprising a urethane (meth)acrylate oligomer, a monomer and a photopolymerization initiator, and a compound containing phosphorus and tin as constituent atoms; and a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C.

Abstract: A manufacturing method of an optical fiber includes forming an optical fiber by forming a plurality of resin-coating layers around a glass fiber including a core part and a cladding part, and forming a marking on an outermost layer, which is a colored layer having pigment, of the plurality of resin-coating layers by melting or scorching a surface of the outermost layer with a laser.

Abstract: An optical fiber includes an optical transmission medium having a core and a cladding, a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium, and a secondary resin layer coating the primary resin layer, wherein a Young's modulus of the primary resin layer is 0.5 MPa or less at 23° C., and the primary resin layer comprises a cured product of an ultraviolet light curable resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and a ?-diketone compound, and tin.

Abstract: An optical fiber comprises a glass fiber which comprises a core and a cladding, a primary resin coating layer which covers the periphery of the glass fiber, and a secondary resin coating layer which covers the periphery of the primary resin coating layer. The glass fiber is a multimode fiber having a core diameter of 40-60 ?m and a cladding diameter of 90-110 ?m, and the primary resin coating layer is a layer formed by curing a curable resin composition which comprises oligomers, monomers, and a reaction initiator, the curable resin composition containing a one-end-capped oligomer in an amount of 30% by mass or larger based on all the oligomers.

Abstract: An optical fiber comprises a glass fiber including a core and a cladding surrounding the core, a non-strippable resin layer that adheres to and covers a surface of the glass fiber, and a buffer layer that covers the non-strippable resin layer, when pullout force measurement in which a length of 10 mm of each of the glass fiber and the non-strippable resin layer is pulled out at a tensile speed of 5 mm/min from the buffer layer is performed, a pullout force at 23° C. is 1.0 kg or less and a pullout force at 95° C. is 0.50 kg or less.

Abstract: An optical fiber comprises a glass fiber which comprises a core and a cladding, a primary resin coating layer which covers the periphery of the glass fiber, and a secondary resin coating layer which covers the periphery of the primary resin coating layer. The glass fiber is a multimode fiber having a core diameter of 40-60 ?m and a cladding diameter of 90-110 ?m, and the primary resin coating layer is a layer formed by curing a curable resin composition which comprises oligomers, monomers, and a reaction initiator, the curable resin composition containing a one-end-capped oligomer in an amount of 30% by mass or larger based on all the oligomers.

Abstract: An optical fiber comprises a glass fiber including a core and a cladding surrounding the core, a non-strippable resin layer that adheres to and covers a surface of the glass fiber, and a buffer layer that covers the non-strippable resin layer, when pullout force measurement in which a length of 10 mm of each of the glass fiber and the non-strippable resin layer is pulled out at a tensile speed of 5 mm/min from the buffer layer is performed, a pullout force at 23° C. is 1.0 kg or less and a pullout force at 95° C. is 0.50 kg or less.

Abstract: An optical fiber comprises a glass portion comprising a core and a cladding surrounding the core, and, a resin portion comprising a non-removable resin layer tightly covering the glass portion and comprising an ultraviolet curing resin and a buffer layer covering the non-removable resin layer and comprising an ultraviolet curing resin. A diameter of the core falls within a range from 20 ?m or larger to 80 ?m or smaller, and an outer diameter of the non-removable resin layer falls within a range from 120 ?m or larger to 127 ?m or smaller. In this optical fiber, when flexural rigidity of the glass portion is EI(g) and flexural rigidity of the resin portion is EI(r), EI(g)?EI(r) is satisfied.

Abstract: An optical fiber cable comprises a plurality of optical fibers, tensile strength fibers that accommodate the plurality of optical fibers, and a sheath formed with a thermoplastic resin and covering the tensile strength resin. In this optical fiber cable, when a Young's modulus of the sheath at 0° C. is E [MPa], a cross-sectional area of the optical fiber cable is S [mm2] and an inner diameter of the sheath of the optical fiber cable is Di [mm], ES (0° C.) [N] which is the product of the Young's modulus E at 0° C. and the cross-sectional area S, and the inner diameter Di [mm] satisfy: ES ? ( 0 ? ° ? ? C .

Abstract: The present invention relates to an optical fiber and an optical cable which can be used for a long term even under environments in which an oil content migrates into them, and the optical fiber has a glass fiber extending along a predetermined axis, and a coating. The coating is composed of a plurality of layers each of which is comprised of an ultraviolet curable resin or a thermosetting resin, and swelling rates of the respective coating layers are set so that they increase from an outer peripheral surface of the glass fiber to an outer peripheral surface of the cable jacket.

Abstract: An optical fiber 1 comprising a core layer 2 composed of a silica based glass, a clad layer 3 formed on the outer circumference of the core layer 2 by curing a curable resin composition, and an ink layer 4 formed around the clad layer 3, wherein adhesive force between the core layer 2 and the clad layer 3 being from 1.5 g/mm to 4.0 g/mm.

Abstract: An optical fiber comprises a glass portion comprising a core and a cladding surrounding the core, and, a resin portion comprising a non-removable resin layer tightly covering the glass portion and comprising an ultraviolet curing resin and a buffer layer covering the non-removable resin layer and comprising an ultraviolet curing resin. A diameter of the core falls within a range from 20 ?m or larger to 80 ?m or smaller, and an outer diameter of the non-removable resin layer falls within a range from 120 ?m or larger to 127 ?m or smaller. In this optical fiber, when flexural rigidity of the glass portion is EI(g) and flexural rigidity of the resin portion is EI(r), EI(g)?EI(r) is satisfied.

Abstract: An optical fiber cable comprises a plurality of optical fibers, tensile strength fibers that accommodate the plurality of optical fibers, and a sheath formed with a thermoplastic resin and covering the tensile strength resin. In this optical fiber cable, when a Young's modulus of the sheath at 0° C. is E [MPa], a cross-sectional area of the optical fiber cable is S [mm2] and an inner diameter of the sheath of the optical fiber cable is Di [mm], ES (0° C.) [N] which is the product of the Young's modulus E at 0° C. and the cross-sectional area S, and the inner diameter Di [mm] satisfy: ES ? ( 0 ? ° ? ? C .

Abstract: An optical cable comprises a coated optical fiber having an optical fiber which includes a core made of glass and a cladding surrounding the core and a jacket made of a thermoplastic resin. The jacket is directly covering the coated optical fiber while in close contact therewith. In the optical cable, the optical fiber has the highest modulus of elasticity in materials constituting the optical cable, a glass diameter of the optical fiber is at least 30 ?m but not more than 200 ?m while being 5% or less of a cable diameter of the optical cable, and a distortion occurring in the optical fiber when bending the optical cable by 180° is 6% or less.

Abstract: An optical cable includes an optical fiber ribbon core wire provided with an optical fiber having a core and a cladding that surrounds the core, a sheath that surrounds the optical fiber ribbon core wire, and a braid arranged inside the sheath. The braid is formed to include wires woven with each other. In the optical cable, the wire that forms the braid is pushed into the sheath so that the sheath is integrated with the braid.

Abstract: An optical cable comprises an optical fiber ribbon, a tension member and a sheath. The optical fiber ribbon is constructed by integrating a plurality of optical fibers arranged in parallel. The sheath is provided so as to surround the optical fiber ribbon. The sheath is used for protecting the optical cable. One optical fiber ribbon is arranged twistably within an inner space surrounded by the sheath.