Dispersion-equalizing optical fiber and optical transmission line including the same

摘要

The present invention relates to an optical transmission line enabling WDM communications in a wide signal light wavelength band centered at a wavelength of 1.55mum, in which nonlinear optical phenomena are less likely to occur; and an optical fiber constituting a part of the optical transmission line. The optical fiber has a dispersion D (unit:ps/nm/km) and a dispersion slope S (unit:ps/nm2/km) satisfying the conditions of -69<=D<=-35 and 0.0050xD<=5<=0.0025xD; and, as characteristics with respect to light having a wavelength of 1.55 mum an effective area of 15 mum2 or more and a bending loss of 50 dB/m or less when wound at a diameter of 20 mm.