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US 12,686,635 B2Granted
Colored optical fiber, optical fiber ribbon, optical fiber ribbon cable and method for manufacturing the same
AssigneeFurukawa Electric Co., Ltd.
InventorsKuniaki Ishizuki, Minoru Kasahara, Mitsuhiro Iwaya
Life of this patent
Estimating the term…
Abstract
A colored optical fiber includes a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber and a secondary layer formed of a second ultraviolet curing resin covering the primary layer. An outer diameter of the secondary layer is smaller than or equal to 210 μm. A Young's modulus of the primary layer is smaller than or equal to 88% with respect to a saturated Young's modulus of the primary layer.
Claims15
A colored optical fiber comprising:
- a bare optical fiber;
- a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber;
- and
- a secondary layer formed of a second ultraviolet curing resin covering the primary layer, wherein an outer diameter of the secondary layer is smaller than or equal to 210 μm,
- wherein a Young's modulus of the primary layer is smaller than or equal to 88% with respect to a saturated Young's modulus of the primary layer, and
- wherein a Young's modulus of the primary layer after the colored optical fiber is additionally irradiated with ultraviolet light of 1000 mW/cm2 and 500 mJ/cm2 using a D bulb is larger than or equal to 25.4% and smaller than or equal to 87.9% with respect to a saturated Young's modulus of the primary layer.
3 more elements
A method for manufacturing a colored optical fiber comprising:
- a step of drawing a bare optical fiber from an optical fiber preform;
- a step of forming a primary layer by applying a first ultraviolet curing resin around the bare optical fiber;
- and
- a step of forming a secondary layer by applying a second ultraviolet curing resin around the primary layer and irradiating the second ultraviolet curing resin with ultraviolet light,
- after manufacturing the colored optical fiber,
- wherein an outer diameter of the secondary layer is smaller than or equal to 210 μm, and
- wherein a Young's modulus of the primary layer is smaller than or equal to 88% with respect to a saturated Young's modulus of the primary layer.
4 more elements
Dependencies are inferred from the claim text.