Patent ID: 7555183
Filing Date: 2009-06-30
Classification: G02B

Abstract:
1. An optical fiber ribbon characterized by comprising a plurality of optical fibers tied in a bundle each including a glass optical fiber and a coating layer provided on the periphery of the glass optical fiber and a coating formed around the plurality of optical fibers to integrate the plurality of optical fibers, wherein the glass-transition temperature of the coating ranges from 80° C. to 130° C. and “a” is 0.01 mm 2 or less, where “a” is a sectional area of the coating in a cross section in which outer half of the optical fiber at an edge of the ribbon and the coating of the optical fiber ribbon are taken along a line passing the center of the glass optical fiber positioned at one of edges of the ribbon out of the plurality of the optical fibers and being perpendicular to the horizontal plane of the optical fiber ribbon, wherein the equilibrium modulus of the coating ranges from 40 MPa to 70 MPa.