Patent ID: 8842957

Claim:
A multimode optical fiber comprising: a graded index glass core comprising refractive index delta Δ1, a maximum refractive index delta Δ1 MAX , said core comprising a core radius between 10 and 35 microns; and a depressed index cladding region surrounding said core and comprising refractive index delta Δ3 and a minimum refractive index delta Δ3 MIN , and an outer cladding comprising refractive index Δ4, said outer cladding region surrounding said depressed index cladding region, said depressed index cladding region having a refractive index delta less than about −0.1% and a width of at least 1 micron, wherein Δ1>Δ4>Δ3 MIN , and wherein said fiber exhibits an overfilled bandwidth at 900 nm to 1200 nm range greater than 2.5 GHz-km.