Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 20-50 ?m; refractive indexes being a graded refractive index distribution with a distribution exponent ? in a range of 1.89-1.97; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-2.72%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 22-57 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 32-60 ?m, and an RRID ?3% in a range of ?0.01%-0.01%.

Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 22.5-27.5 ?m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent ? in a range of 1.99-2.06; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-1.3%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 25.5-34.5 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 30.5-49.5 ?m, and an RRID ?3% in a range of ?0.01%-0.01%. The outer cladding has a radius in a range of 61.5-63.5 ?m, and an RRID ?4% is in a range of ?0.20%-0.30%.

Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 22.5-27.5 ?m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent ? in a range of 1.99-2.06; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-1.3%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 25.5-34.5 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 30.5-49.5 ?m, and an RRID ?3% in a range of ?0.01%-0.01%. The outer cladding has a radius in a range of 61.5-63.5 ?m, and an RRID ?4% is in a range of ?0.20%-0.30%.

Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 20-50 ?m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent a in a range of 1.89-1.97; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-2.72%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 22-57 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 32-60 ?m, and an RRID ?3% in a range of ?0.01%-0.01%.