Patent ID: 6888993

Claim:
A dispersion compensating optical fiber, comprising: a refractive index profile having a central core segment with a positive relative refractive index Î” 1 , a moat segment surrounding the central core segment having negative relative refractive index Î” 2 , and a ring segment surrounding the moat segment having a positive relative refractive index Î” 3 , wherein Î” 1 >Î” 3 >Î” 2 , the refractive index profile resulting in a dispersion slope of less than âˆ’0.29 ps/nm 2 /km and greater than âˆ’0.43 ps/nm 2 /km at 1575 nm; a dispersion more negative than âˆ’96 ps/nm/km and less negative than âˆ’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.