Patent ID: 8670643

Claim:
An optical fiber comprising a glass core and a glass cladding surrounding and in direct contact with the glass core, wherein: the glass core comprises: a radius R c wherein from about 16 μm<R c <50 μm; a graded refractive index profile with an alpha value greater than or equal to about 1.0 and less than about 10 at a wavelength of 1550 nm; a maximum relative refractive index Δ cMAX % from about 0.2% to about 0.75% relative to the glass cladding; an effective area greater than or equal to about 150 μm 2 , the glass core supporting the propagation and transmission of an optical signal with X modes at a wavelength of 1550 nm, wherein X is an integer greater than 1 and less than or equal to 110; and the glass cladding comprises a maximum relative refractive index Δ c1MAX % such that Δ cMAX %>Δ c1MAX %, wherein the optical fiber has an RMS pulse broadening of less than or equal to about 0.15 ns/km at a wavelength of 1550 nm.