OPTICAL FIBER CORD AND METHOD OF IDENTIFYING COATED OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To provide an optical fiber cord in which coated optical fiber is identified with visible light, when the optical fiber is used in which an optical transmission part or a core is enclosed by a plurality of cavities.

SOLUTION: The optical fiber cord uses the optical fiber in which the optical transmission part or the core 21 is enclosed by a plurality of cavities 23; a light of which the wavelength is in the range of 380 to 1,200 nm is transmitted through the gap between the cavities 23; the optical fiber is covered by a UV coat 24; Kevlar (R) fibers 25 and a cord outer coat 26; and when the light passes through the UV coat 24, the Kevlar fibers 25 and the cord outer coat 26 in the direction of cross section, the total transmittance is 0.1% or larger and 70% or smaller for the wavelength range of 380 to 1,200 nm.

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