Highly nonlinear dispersion shifted fiber and its application to broadband wavelength converter

Dispersion shifted fiber with a high nonlinearity coefficient (20.4 W/sup -1/ km/sup -1/) and low attenuation (0.51 dB/km) was successfully fabricated. 500 m of the fabricated fiber efficiently generated four-wave mixing, and nearly constant wavelength conversion efficiency over 20 nm was demonstrated.