Patent ID: 6959136

Claim:
An optical fiber suitable for use in a dispersion managed transmission line, which has a ratio of a dispersion to a dispersion slope being positive at a wavelength of 1550 nm, a positive dispersion of 14 to 24 ps/nm/km in a wavelength band of 1530 to 1570 nm, a positive dispersion slope of not more than 0.08 ps/nm 2 /km in a wavelength band of 1530 to 1570 nm, a transmission loss of not more than 0.25 dB/km at a wavelength of 1550 nm, an effective core area of not less than 95 μm 2 at a wavelength of 1550 nm, a bending loss of 20 dB/m or less at a bending diameter of 20 mm and at a wavelength of 1550 nm, and a polarization mode dispersion of 0.15 ps/km 1/2 or less at a wavelength of 1550 nm, and which operates in a single mode in a wavelength band of 1530 to 1570 nm.