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US 6,618,533 B2Granted
Positive dispersion low dispersion slope fiber
AssigneeCorning Incorporated
InventorsDaiping Ma, David Kinney Smith
Life of this patent
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Abstract
Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described.
Claims14
A single optical waveguide fiber comprising:
- a segmented core having at least three segments, each of the segments having a radius ri, a refractive index profile and a relative refractive index percent, Δi%, where i is equal to the number of segments,
- and a clad layer surrounding and in contact with the core, the clad layer having a refractive index nc;
- wherein the core comprises at least a first segment comprising Δ1, a second segment surrounding the first segment and comprising Δ2, and a third segment surrounding the second segment and comprising Δ3, wherein Δ1>Δ2>Δ3, and the ri and Δi%, and the refractive index profiles are selected to provide:
- zero dispersion wavelength less than 1500 nm;
- total dispersion slope<0.08 ps/nm2-km over the wavelength range 1530 nm to 1570 nm;
- effective area>60 μm2.
3 more elements
Dependencies are inferred from the claim text.