Patent ID: 8290324

Claim:
A single-mode optical fiber, comprising: a central core having a radius (r 1 ) and a positive index difference (Î”n 1 ) with an outer optical cladding; a first inner cladding having a radius (r 2 ), a width (w 2 ), and an index difference (Î” 2 ) with the outer optical cladding; a second inner cladding having a radius (r 3 ), a width (w 3 ), and an index difference (Î”n 3 ) with the outer optical cladding; wherein the optical fiber has a cable cut-off wavelength of 1260 nanometers or less; wherein the optical fiber has a zero chromatic dispersion wavelength of between 1300 nanometers and 1324 nanometers; wherein, at the zero chromatic dispersion wavelength, the optical fiber has a chromatic dispersion slope of 0.092 ps/(nm 2 Â·km) or less; and wherein, at a wavelength of 1550 nanometers, the optical fiber has an effective area of at least about 100 Î¼m 2 .