Dispersion compensating optical fiber for SMF and transmission link including same
AssigneeCorning Incorporated
InventorLu Zhang
Life of this patent
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Abstract
A DCF for compensating for the accumulated dispersion of a length of SMF in the C+L band window that includes a core surrounded by a cladding layer of refractive index Δc. The core includes at least three radially adjacent segments; a central core segment having a positive Δ1, a moat segment having a negative refractive index Δ2, and a ring segment having a positive refractive index Δ3, wherein Δ1>Δ3>Δc>Δ2. The DCF exhibits a negative dispersion slope of between −0.29 and −0.43 ps/nm2/km at 1575 nm, and a total dispersion less than −96 and greater than −108 ps/nm/km at 1575 nm. A transmission link including the combination of a SMF and the present invention DCF is also disclosed.
Claims15
A dispersion compensating optical fiber, comprising:
- a refractive index profile having
- a central core segment with a positive relative refractive index Δ1,
- a moat segment surrounding the central core segment having negative relative refractive index Δ2, and
- a ring segment surrounding the moat segment having a positive relative refractive index Δ3, wherein Δ1>Δ3>Δ2,
- the refractive index profile resulting in
- a dispersion slope of less than −0.29 ps/nm2/km and greater than −0.43 ps/nm2/km at 1575 nm;
- a dispersion more negative than −96 ps/nm/km and less negative than −108 ps/nm/km at 1575 nm,
- a kappa value, defined as the dispersion at 1575 nm divided by the dispersion slope at 1575 nm, of between 272 and 332 nm, and
- effective area (Aeff) is greater than 18.5 square microns at 1575 nm.
A dispersion compensating optical fiber, comprising:
- a refractive index profile having
- a central core segment with a positive relative refractive index Δ1 greater than 1.7% and less than 2.0%,
- a moat segment surrounding the central core segment having negative relative refractive index Δ2 less than −0.2% and greater than −0.6%,
- a ring segment surrounding the moat segment having a positive relative refractive index Δ3 greater than 0.2% and less than 0.5%, and
- a cladding layer having a relative refractive index Δc surrounding the ring segment, wherein Δ1>Δ3>Δc>Δ2,
- the refractive index profile resulting in
- a dispersion slope less than −0.32 ps/nm2/km and greater than −0.39 ps/nm2/km at 1575 nm;
- a dispersion less than −102 ps/nm/km and greater than −108 ps/nm/km at 1575 nm, and
- a kappa value, defined as the dispersion at 1575 nm divided by the dispersion slope at 1575 nm, of between 272 and 332 nm.
A dispersion compensating optical fiber, comprising:
- a refractive index profile having
- a central core segment with a positive relative refractive index Δ1 greater than 1.7% and less than 2.0% wherein an outer radius r1 of the central core segment is between 1.7 and 2.0 microns,
- a moat segment surrounding the central core segment having negative relative refractive index Δ2 less than −0.2% and greater than −0.6% wherein an outer radius r2 of the moat segment is between 3.5 and 4.5 microns,
- a ring segment surrounding the moat segment having a positive relative refractive index Δ3 greater than 0.2% and less than 0.5% wherein a center radius r3 of the ring segment is between 5 and 8 microns, and
- a cladding layer having a relative refractive index Δc surrounding the ring segment, wherein Δ1>Δ3>Δc>Δ2,
- the refractive index profile resulting in
- a dispersion slope less than −0.32 ps/nm2/km and greater than −0.39 ps/nm2/km at 1575 nm;
- a dispersion less than −102 ps/nm/km and greater than −108 ps/nm/km at 1575 nm, and
- a kappa value, defined as the dispersion at 1575 nm divided by the dispersion slope at 1575 nm, of between 272 and 332 nm.
Dependencies are inferred from the claim text.