Patent ID: 9170369
Filing Date: 2015-10-27
Classification: G02B

Abstract:
1. A graded refractive index bending-resistant multimode optical fiber, comprising: a core layer; and claddings surrounding the core layer, wherein the core layer has a radius in a range of 22.5 μm to 27.5 μm; refractive indexes being of a gradient-graded refractive index distribution with a distribution exponent α in a range of 1.99 to 2.06; and a maximum relative refractive index difference Δ1% max in a range of 1.07% to 1.3%; wherein the claddings surrounding the core layer comprises an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the intermediate cladding; wherein the inner cladding has a radius in a range of 25.5 μm to 34.5 μm, and a relative refractive index difference Δ2% in a range of −0.02% to 0.02%; wherein the intermediate cladding is a pure quartz glass layer, and has a radius in a range of 30.5 μm to 49.5 μm, and a relative refractive index difference Δ3% in a range of −0.01% to 0.01%; and wherein the outer cladding has a radius in arrange of 61.5 μm to 63.5 μm, and a relative refractive index difference Δ4% is in a range of −0.20% to 0.30%.