OPTICAL FIBER RIBBON CORE AND OPTICAL FIBER CABLE

摘要

An optical fiber ribbon core and an optical fiber cable contributive to larger communication capacity in wavelength multiplex communication by suppressing deterioration in polarization mode dispersion. In the optical fiber ribbon core comprising a plurality of bundled optical fiber cores (12), and a ribbon coating layer (13) formed around the plurality of optical fiber cores to integrate them, glass transition temperature of a sheath is in the range of 80-130°C, and assuming that the cross-sectional area of the sheath, contained in a total cross-sectional area obtained when the outer half of the outermost-sheel optical fiber core is cut out together with the sheath of the optical fiber ribbon core by using as one end a line normal to a horizontal plane of an optical fiber ribbon cores and passing the center of a glass optical fiber located at one outermost shell out of the plurality of optical fiber cores, is a, this cross-sectional area a is 0.01 mm² or less.