Yangtze Optical Fibre and Cable Joint Stock Limited Company

Yangze Optical Fibre and Cable Company Ltd.

Su Chen

Jie Luo

Beibei Cao

Chen Yang

Weijun Tong

Xianyuan Ni

An optical fiber with a large effective area includes a core layer and a cladding layer. The core layer comprises an inner core layer having a radius of 1-4 &#x3bc;m and a relative refractive index difference &#x394;of &#x2212;0.2%&#x2267;&#x394;&#x3c;0% relative to the outer core layer, and an outer core layer having a radius of 4-7 &#x3bc;m and a relative refractive index difference &#x394;of &#x2212;0.15%-0.05%. &#x394;remains unchanged or increases as the radius of the inner core layer increases. The cladding layer comprises an inner cladding layer cladding the core layer and having a radius of 7-20 &#x3bc;m and a relative refractive index difference &#x394;of &#x2212;0.5%&#x2dc;&#x2212;0.1%, a depressed cladding layer has a radius of 12-40 &#x3bc;m, and a relative refractive index difference &#x394;of &#x2212;1.0%&#x2dc;&#x2212;0.3%, and an outer cladding layer having a relative refractive index difference &#x394;of &#x2212;0.2%&#x2dc;&#x2212;0.4%.

Optical fiber with large effective area

A low attenuation single mode optical fiber includes a core layer and claddings. The core layer has the relative refractive index difference (RRID) &#x394;1 ranging from &#x2212;0.1% to +0.1% and the radius Rranging from 4.0 &#x3bc;m to 6.0 &#x3bc;m. The claddings have three claddings layers surrounding the core layer. The RRID of the first cladding layer &#x394;2 ranges from &#x2212;0.2% to &#x2212;0.6%, and the radius Rthereof ranges from 10 &#x3bc;m to 22 &#x3bc;m. The RRID of the second cladding layer &#x394;3 is less than &#x394;2. The RRID and radius of the first cladding layer and the RRID and radius of the second cladding layer satisfy the relationship of: V=(&#x394;2&#x2212;&#x394;3)&#xd7;(R&#x2212;R), and the value of V ranges from 0.15% &#x3bc;m to 0.8% &#x3bc;m. The third cladding layer is all the layers that closely surround the second cladding layer, and the RRID of each layer is greater than &#x394;3.

Single mode optical fiber

Growing community of inventors

Hubei, China

Su Chen