OPTICAL TRANSMISSION LINE AND OPTICAL TRANSMISSION SYSTEM INCLUDING IT

摘要

An optical transmission line having a structure for reducing both nonlinearity and dispersion slope effectively and an optical transmission system including it. The optical transmission line comprises, as a transit transmission line provided between stations, a single mode optical fiber having a zero dispersion wavelength in 1.3 mu m wavelength band, and an optical fiber for compensating for wavelength dispersion of the single mode optical fiber. The optical transmission line has an average dispersion slope Save in the range from -0.0113 to 0.0256 ps/nm<2>/km at an wavelength of 1550 nm and an equivalent effective cross-sectional area EAeff of 50 mu m<2> or above at an wavelength of 1550 nm, wherein the Save and the EAeff satisfy a specified relation so that the bending loss falls within an allowable range of 2-10 dB/m.