Optical fiber having large effective area and dispersion-compensated optical transmission system

摘要

An optical fiber is fabricated provided with a refractive index profile having a central core (1); a middle part (2) provided around the outer periphery of the central core and having a lower refractive index than that of the central core; and a cladding (4) provided around the periphery of the middle part and having a higher refractive index than the middle part and a lower refractive index than the central core. This optical fiber has an effective core area of 120 mu m<2> or more in an employed wavelength band selected from the range of 1.53 SIMILAR 1.63 mu m, and has a cut-off wavelength that is capable of substantially single mode propagation in the aforementioned employed wavelength band. As a result, it is possible to construct an optical transmission system having excellent transmission characteristics in which nonlinearity are decreased. <IMAGE>