Patent ID: 6546177
Filing Date: 2003-04-08
Classification: C03B,G02B

Abstract:
A dispersion shifted optical fiber, wherein having, in a used wavelength band that is selected from between 1490 and 1625 nm, chromatic dispersion values of 7 to 15 ps/km/nm, an Aeff of 60 to 110 &mgr;m2, a dispersion slope of 0.08 ps/km/nm2 or less, a bending loss of 100 dB/m or less, and a cutoff wavelength that provides essentially single mode transmission;wherein the dispersion shifted optical fiber has a refractive index profile comprising: a central core portion; a step core portion provided at an outer periphery of the central core portion and having a refractive index lower than that of the central core portion; and cladding provided at an outer periphery of the step core portion and having a refractive index lower than that of the step core portion.