Patent ID: 6985662

Claim:
A dispersion compensating optical fiber, comprising: a relative refractive index profile having a central core segment with a positive relative refractive index (Δ 1 ) and a core outer radius (r 1 ), a moat segment surrounding the central core segment having negative relative refractive index (Δ 2 ) and a moat outer radius (r 2 ) wherein the relative refractive index (Δ 2 ) is between −0.4 and −0.6%, and a ring segment surrounding the moat segment having a positive relative refractive index (Δ 3 ), a ring center radius (r 3 ) to a center of the ring segment wherein the relative refractive index profile results in total dispersion of less than −114 ps/nm/km and greater than −143 ps/nm/km at 1550 nm, and kappa, defined as the total dispersion at 1550 nm divided by total dispersion slope at 1550 nm, of between 96 and 150 nm.