Patent ID: 8768131

Claim:
A graded index multimode optical fiber comprising: a core region extending radially outwardly from a centerline to a radius R 1 and having a positive relative refractive index percent profile Δ 1 (r), wherein the core region has a maximum relative refractive index percent, Δ 1MAX ; a first annular cladding region surrounding and directly adjacent to the core region and extending to a radius R 2 , having a width W 2 of R 2 −R 1 , and having a relative refractive index percent profile Δ 2 (r), with a minimum relative refractive index percent, Δ 2MIN ; a second annular cladding region surrounding the first annular cladding region and having a relative refractive index percent profile, Δ 3 (r), with a maximum relative refractive index percent, Δ 3MAX ; wherein Δ 3MAX is ≧0.05%, 5 μm≦W 2 ≦10 μm; and R 1 ≧20 μm.