Yangtze Optical Fibre and Cable Joint Stock Limited Company

Haolin Guo

Ruichun Wang

Lei Zhang

Jinyan Zhang

Raadjkoemar Matai

Yiwen Wu

In one aspect of the invention, the bend insensitive single-mode optical fiber includes a core layer and cladding layers having an inner cladding layer, a trench cladding layer and an outer cladding layer sequentially formed surrounding the core layer from inside to outside. For the core layer, the diameter is 7-7.9 &#x3bc;m, and the relative refractive index difference &#x394;is between 4.6&#xd7;10and 6.0&#xd7;10. For the inner cladding layer, the diameter is 15-17 &#x3bc;m, and a relative refractive index difference &#x394;is between &#x2212;3&#xd7;10and 3&#xd7;10. For the trench cladding layer, the diameter is 24-33 &#x3bc;m, and the relative refractive index difference &#x394;is between &#x2212;2.9&#xd7;10and &#x2212;7.3&#xd7;10, changes in a gradient manner and increases gradually from outside to inside, where a relative refractive index difference &#x394;at an outermost interface is smaller than a relative refractive index difference &#x394;at an innermost interface.

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Hubei, China

Haolin Guo