NZDSF optical fiber with low dispersion zero and low slope

An optical waveguide fiber comprising:

• a central region extending radially outward from the centerline and having a positive relative refractive index percent, Δ1%(r) with a maximum relative refractive index percent, Δ1,MAX;
• a first annular region surrounding the central region and having a positive relative refractive index percent, Δ2%(r), with a maximum relative refractive index percent, Δ2,MAX;
• a second annular region surrounding the first annular region and having a negative relative refractive index percent, Δ3%(r) with a minimum relative refractive index percent, Δ3,MIN, the second annular region extending from an inner radius, R3A, to an outer radius, R3;
• and
• an outer annular cladding region surrounding the second annular region and having a relative refractive index percent, Δc%(r);
• wherein the mode field diameter at 1550 nm is greater than 9 μm;
• wherein the inner radius of the second annular region, R3A, is greater than the mode field diameter at 1550 nm;
• wherein the outer radius of the second annular region, R3, is less than or equal to 2.5 times the mode field diameter at 1550 nm;
• and
• wherein the optical fiber has an effective area of greater than about 60 μm2 at a wavelength of about 1550 nm, a dispersion at a wavelength of about 1550 nm between about 4 ps/nm-km and 10 ps/nm-km, a dispersion slope of less than 0.07 ps/nm2/km at a wavelength of about 1550 nm, and a zero-dispersion wavelength of less than about 1500 nm.