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 c. The core includes at least three radially adjacent segments;
a central core segment having a positive 1, a moat segment having
a negative refractive index 2, and a ring segment having a positive
refractive index 3, wherein 13c2.
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.
