Patent ID: 6606438
Filing Date: 2003-08-12
Classification: C03B,G02B

Abstract:
An optical fiber comprising:a core region surrounded by a cladding region, the core region comprising: a centerline region having an outer radius and a maximum index of refraction delta percent; a moat region surrounding the centerline region and having an outer radius and a minimum index of refraction delta percent; and an annular ring region surrounding the moat region and having an outer radius and a maximum index of refraction delta percent; wherein the cladding abuts the annular ring region; and wherein the relative refractive indexes and radii of the regions are selected to yield a local dispersion which is greater than 1 ps/nm-km at 1550 nm, and a dispersion slope less than 0.03 ps/nm2-km over the wavelength range 1480 to 1625 nm.