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AssigneeYangtze Optical Fibre and Cable Joint Stock Limited Company
InventorsLei ZHANG, Ruichun WANG, Rui ZHANG, Chao WU, Lan DENG, Hongyan ZHOU, Lei SHEN, Jie LUO
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A low-dispersion single-mode optical fiber includes a core and claddings covering the core. The core has a relative refractive index difference of 0.30-0.65% and a radius of 2.5-4.5 μm. The claddings include first, second, third cladding layers and an outer cladding arranged sequentially from inside to outside. The first cladding layer covers the core, and has a relative refractive index difference of −0.70% to −0.30% and a radius of 4.5-7.5 μm. The second cladding layer covers the first cladding layer, and has a relative refractive index difference of −0.20% to −0.25% and a radius of 7.0-12.0 μm. The third cladding layer covers the second cladding layer, and has a relative refractive index difference of −0.60% to 0.00% and a radius of 10.0-20.0 μm. The outer cladding covers the third cladding layer, and is a layer made of pure silicon dioxide glass.
A low-dispersion single-mode fiber, comprising a core layer and a cladding, wherein the core layer has a relative refractive index difference Δ1 in a range from 0.30% to 0.65% and a radius R1 in a range from 2.5 μm to 4.5 μm, and the cladding is divided into three cladding layers and one outer cladding from inside to outside, wherein a first cladding layer covers the core layer, and has a relative refractive index difference Δ2 in a range from −0.70% to −0.30% and a radius R2 in a range from 4.5 μm to 7.5 μm;
The low-dispersion single-mode fiber according to 2, wherein the fiber has attenuation smaller than or equal to 0.80 dB/km at a waveband ranging from 1260 nm to 1460 nm.
Dependencies are inferred from the claim text.