NZDSF optical fiber with low dispersion zero and low slope
AssigneeCorning Incorporated
InventorScott R. Bickham
Life of this patent
Estimating the term…
Abstract
An optical waveguide fiber having an effective area of greater than about 60 μm2 at a wavelength of about 1550 nm, 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. In preferred embodiments, the optical fiber has a mode field diameter greater than 9 μm at 1550 nm and includes a first core region with a positive relative refractive index, a first annular core region with a positive relative refractive index, and a second annular core region having a negative refractive index, wherein the the second annular core region begins at a radius greater than the mode field diameter and ends at a radius less than about 2.5 times the mode field diameter. Cabled cutoff wavelengths are less than about 1300 nm.
Claims18
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.
Dependencies are inferred from the claim text.