Yangtze Optical Fibre and Cable Joint Stock Limited Company

Jiangang Yu

Chen Yang

Song Wang

A fused-biconical-taper bend-insensitive single mode optical fiber includes a core and a cladding. The core is a fluorine-germanium co-doped silicon-dioxide quartz glass layer, a diameter Dthereof is 7-10 &#x3bc;m, and a relative refractive index difference &#x394;thereof is 0.20% to 0.40%. A range of &#x394;Ge is 0.30% to 0.60%, and a range of &#x394;F is &#x2212;0.05% to &#x2212;0.15%. The cladding includes three layers. A first layer is a fluorine-germanium co-doped silicon-dioxide quartz glass layer, a relative refractive index difference &#x394;thereof is &#x2212;0.02% to &#x2212;0.10%, and a diameter Dthereof is 15-30 &#x3bc;m. A second layer is a fluorine-doped silicon-dioxide quartz glass layer, a relative refractive index difference &#x394;thereof is &#x2212;0.01% to &#x2212;0.05%, and a diameter Dthereof is 30-50 &#x3bc;m. A third layer is a pure silicon-dioxide quartz glass layer, and a diameter Dthereof is 124-126 &#x3bc;m.

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Hubei, China

Jiangang Yu