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US 7,406,237 B2Granted
Multiband optical fiber
AssigneeCorning Incorporated
InventorsScott Robertson Bickham, Snigdharaj Kumar Mishra
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Abstract
An optical waveguide fiber having a core surrounded by a cladding. The core may have only a central segment, or a central segment and an annular segment surrounding the central segment. The central segment has a positive relative refractive index profile. The annular segment has a negative relative refractive index profile. The relative refractive index of the optical fiber provides an LP02 cable cutoff less than 850 nm and an LP21 cable cutoff less than 850 nm.
Claims17
An optical waveguide fiber comprising:
- a core comprising a central core segment extending radially outwardly from a centerline to a radius R1 and having a positive relative refractive index percent profile, Δ1(r) in %, wherein the central core segment comprises a maximum relative refractive index percent, ΔMAX;
- and
- an outer annular cladding surrounding the core and comprising a relative refractive index percent, Δc (r) in %;
- wherein ΔMAX>0;
- wherein the relative refractive index of the optical fiber provides an LP02 cable cutoff less than 850 nm and an LP21 cable cutoff less than 850 nm;
- wherein the relative refractive index of the optical fiber provides a bandwidth greater than 10 GHz-km at all wavelengths in a wavelength range having a rangewidth of at least 10 nm;
- and
- wherein the wavelength range lies between 830 and 870 nm.
5 more elements
An optical waveguide fiber comprising:
- a core comprising a central core segment extending radially outwardly from a centerline to a radius R1 and having a positive relative refractive index percent profile, Δ1(r) in %, wherein the central core segment comprises a maximum relative refractive index percent, ΔMAX;
- and
- an outer annular cladding surrounding the core and comprising a relative refractive index percent, Δc (r) in %;
- wherein ΔMAX>0;
- wherein the relative refractive index of the optical fiber provides an LP02 cable cutoff less than 850 nm and an LP21 cable cutoff less than 850 nm;
- and wherein the central core segment comprises an alpha region having an alpha between 2.0 and 2.9.
3 more elements
Dependencies are inferred from the claim text.