The optical fiber has a dispersion value at a 1.55 m-wavelength band,
of 6 to 24 ps/nm/km, and satisfies A3D+40, where D represents a dispersion
value (ps/nm/km) at a central wavelength of a 1.55 m-wavelength band, and
A represents an effective core area (m2). The optical transmission
line for transmitting an optical signal, which includes the optical fiber is provided
as well.
