PIGMENTED FIBER OPTIC CABLE CORE

摘要

The present invention provides a pigmented fiber optic cable core wherein transmission loss tends not to increase even when immersed in water. The pigmented fiber optic cable core (16) according to one embodiment of the present invention comprises a glass fiber optic cable (11), a primary coated layer (12) that coats the glass fiber optic cable (11), a secondary coated layer (13) that coats the primary coated layer (12), and a pigmented layer (15) that coats the secondary coated layer (13). The thermal expansion coefficient ratio of a layered product (21) having the secondary coated layer (13) and the pigmented layer (15) that coats the secondary coated layer (13) is no less than 0.98 and no more than 1.03 with respect to the thermal expansion coefficient of the secondary coated layer (13), and the glass transition temperature ratio of the layered product (21) is no less than 0.96 and no more than 1.03 with respect to the glass transition temperature of the dynamic viscoelasticity of the secondary coated layer (13) in a temperature range of 100°C~150°C.