Colored optical fiber, optical fiber ribbon and optical fiber cable, using colored optical fiber

摘要

A colored optical fiber including a glass optical fiber; a primary coating layer that covers the glass optical fiber; a secondary coating layer that covers the primary coating layer; and a colored layer that coats the secondary coating layer. The relaxation modulus after 24 hours at 60° C. of of the layers coated is 140 MPa or less.

主权项

1. An optical fiber cable, comprising:
an optical fiber ribbon including a plurality of colored optical fibers that are arranged parallel to each other and are collected using a ribbon resin, the colored optical fibers each including:
a glass optical fiber, anda coating layer, the coating layer including:
a primary coating layer that covers the glass optical fiber,a secondary coating layer that covers the primary coating layer, anda colored layer that coats the secondary coating layer, and whereinthe coating layers that are composed of the primary coating layer, the secondary coating layer, and the colored layer included a relaxation modulus after 24 hours at 60° C. of 140 MPa or less, wherein an increase of transmission loss of the optical fiber ribbon after being immersed in hot water at 60° C. for 90 days is less than 0.1 dB/km, and each of the colored optical fibers accommodated in the optical fiber cable includes a polarization-mode dispersion of 0.1 ps/√{square root over ( )} km or less.