New medium-dispersion fiber with large effective area and low dispersion slope

We designed and fabricated MDF with a dualring index profile. The fiber realized a large effective area of approximately 100 /spl mu/m/sup 2/, small dispersion slope of 0.065 ps/nm/sup 2//km, low attenuation of 0.212 dB/km. The splice loss between the fiber and a SM fiber was 0.12 dB. Consequently, the MDF is suitable for high bit rate and long haul systems over S-, C-, L- bands.