High bandwidth radiation-resistant multimode optical fiber

A high bandwidth radiation-resistant multimode optical fiber, comprising a core layer and a cladding layer,

• wherein the core layer is a fluorine-doped quartz glass layer with a graded refractive index distribution and a distribution power exponent α in a range from 1.7 to 2.2, and the core layer has a minimum relative refractive index difference Δ1% min in a range from −0.8% to −1.2% and a radius R1 in a range from 15 μm to 35 μm;
• and
• wherein the cladding layer outside of the core layer comprises an inner cladding layer and/or a depressed inner cladding layer, an intermediate cladding layer, a depressed cladding layer, and an outer cladding layer in sequence from inside to outside, wherein:
• the inner cladding layer has a radius R2 in a range from 15 μm to 38 μm and a relative refractive index difference Δ2% in a range from −0.8% to −1.2%;
• the depressed inner cladding layer has a radius R3 in a range from 15 μm to 55 μm and a relative refractive index difference Δ3 in a range from −1.0% to −1.4%;
• the intermediate cladding layer has a radius R4 in a range from 15.5 μm to 58 μm and a relative refractive index difference Δ4 in a range from −0.7% to −0.2%;
• the depressed cladding layer has a radius R5 in a range from 16 μm to 60 μm and a relative refractive index difference Δ5 in a range from −0.8% to −1.2%;
• and the outer cladding layer is a pure silica glass layer.