Back to results
US 7,024,083 B2Granted
Non-zero dispersion shifted optical fiber
AssigneeCorning Incorporated
InventorsScott R. Bickham, Snigdharaj K. Mishra, Steven S. Rosenblum
Life of this patent
Estimating the term…
Abstract
An optical waveguide fiber including a central core region extending radially outward from the centerline and having a non-negative relative refractive index percent profile. The optical fiber exhibits 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 1450 nm.
Claims21
An optical waveguide fiber comprising:
- a central core region extending radially outward from a centerline to a radius R1 and having a positive relative refractive index percent, Δ1 % (r) with a maximum relative refractive index percent, Δ1,MAX, wherein Δ1,MAX>0.6%;
- a first annular region surrounding the central core region and extending to a radius R2 and having a non-negative relative refractive index percent, Δ2 % (r), with a minimum relative refractive index percent, Δ2,MIN;
- a second annular region surrounding the first annular region and extending to a radius R3 and having a positive relative refractive index percent, Δ3 % (r) with a maximum relative refractive index percent, Δ3,MAX;
- and
- an outer annular cladding region surrounding the second annular region and having a relative refractive index percent, Δc % (r);
- wherein Δ1,MAX>Δ3,MAX>Δ2,MIN≧0;
- wherein the relative refractive index of the optical fiber is selected to provide an effective area of greater than about 60 μm2 at a wavelength of about 1550 nm, a dispersion slope of less than 0.06 ps/nm2/km at a wavelength of about 1550 nm, an attenuation at a wavelength of about 1550 nm of less than 0.22 dB/km, and a zero-dispersion wavelength of between 1380 and 1420 nm.
4 more elements
An optical waveguide fiber comprising:
- a central core region extending radially outward from a centerline to a radius R1 and having a positive relative refractive index percent, Δ1 % (r) with a maximum relative refractive index percent, Δ1,MAX, wherein Δ1,MAX>0.6%;
- a first annular region surrounding the central core region and extending to a radius R2 and having a non-negative relative refractive index percent, Δ2 % (r), with a minimum relative refractive index percent, Δ2,MIN;
- a second annular region surrounding the first annular region and extending to a radius R3 and having a positive relative refractive index percent, Δ3 % (r) with a maximum relative refractive index percent, Δ3,MAX;
- and
- an outer annular cladding region surrounding the second annular region and having a relative refractive index percent, Δc % (r);
- wherein Δ1,MAX>Δ3,MAX>Δ2,MIN≧0.
- wherein the relative refractive index of the optical fiber is selected to provide an effective area of greater than about 60 μm2 at a wavelength of about 1550 nm, an attenuation at a wavelength of about 1550 nm of less than 0.22 dB/km, and a zero-dispersion wavelength of less than about 1450 nm;
- and
- wherein the central core region comprises a centermost portion extending from the centerline to a radius of 1 μm, and a second portion surrounding and directly adjacent to the centermost portion, wherein the centermost portion has a maximum relative refractive index ΔAMAX, wherein the second portion has a maximum relative refractive index ΔBMAX, and wherein the absolute magnitude of the difference between ΔAMAX and ΔBMAX is greater than 0.2%.
6 more elements
An optical waveguide fiber comprising:
- a central core region extending radially outward from a centerline to a radius R1 and having a positive relative refractive index percent, Δ1 % (r) with a maximum relative refractive index percent, Δ1,MAX, wherein Δ1,MAX>0.6%;
- a first annular region surrounding the central core region and extending to a radius R2 and having a non-negative relative refractive index percent, Δ2 % (r), with a minimum relative refractive index percent, Δ2,MIN;
- a second annular region surrounding the first annular region and extending to a radius R3 and having a positive relative refractive index percent, Δ3 % (r) with a maximum relative refractive index percent, Δ3,MAX;
- and
- an outer annular cladding region surrounding the second annular region and having a relative refractive index percent, Δc % (r);
- wherein Δ1,MAX>Δ3,MAX>Δ2,MIN≧0;
- wherein the relative refractive index of the optical fiber is selected to provide an effective area of greater than about 60 μm2 at a wavelength of about 1550 nm, a dispersion slope of less than 0.06 ps/nm2/km at a wavelength of about 1550 nm, an attenuation at a wavelength of about 1550 nm of less than 0.22 dB/km, and a zero-dispersion wavelength of less than about 1450 nm;
- and
- wherein the central core region comprises a centermost portion extending from the centerline to a radius of 1 μm, and a second portion surrounding and directly adjacent to the centermost portion, wherein the centermost portion has a maximum relative refractive index ΔAMAX, wherein the second portion has a maximum relative refractive index ΔBMAX, and wherein the absolute magnitude of the difference between ΔAMAX and ΔBMAX is greater than 0.2%.
6 more elements
Dependencies are inferred from the claim text.