Patent ID: 7289710
Filing Date: 2007-10-30
Classification: G02B

Abstract:
1. A single-mode optical fiber suitable for a WDM (Wavelength Division Multiplexing) system, comprising: (a) a first core region positioned in the center of cross section and having a radius r (b) a second core region surrounding the first core region and having a radius r (c) a third core region surrounding the second core region and having a radius r (d) a clad region surrounding the third core region and having a radius r (e) wherein the radii of the regions have a relation of r (here, Δ (f) wherein the optical fiber uses a wavelength region from 1460 to 1625 nm, and has a dispersion value of 0.1 to 3.0 ps/nm-km at 1460 nm, 3.0 to 5.5 ps/nm-km at 1550 nm, and 4.5 to 8.0 ps/nm-km at 1625 nm, and (g) wherein a bending loss is 0.5 dB or less at 1625 nm under the condition of a bending radius of 30 mm, 100 turns.