Yangtze Optical Fibre and Cable Joint Stock Limited Company

Huazhong University of Science and Technology

Yangtze Optical Fibre Cable Joint Stock Limited Company

Crrc Yangtze Co., Ltd.

Lei Zhang

Ruichun Wang

Jun Wu

Shengya Long

Jihong Zhu

Rui Zhang

Jie Luo

Hongyan Zhou

Yiwen Wu

Raadjkoemar Matai

Yusheng Shi

Baolei Wang

Fengwei Liu

Chuqiang Tang

Tao Liu

Yueming Hu

Lijie Su

Mingfeng Mao

Jinyan Zhang

Zhiyong Wang

Haiping Hu

Bo Song

Qiaoli Tian

Junqin Zhu

Xin Tan

Xiaobo Lan

Peng Li

Zhi Zhang

Lei Shen

Lan Deng

Chao Wu

Ming Ye

Haibin Hu

Haolin Guo

Yunqing Zuo

Liang Al

The present disclosure provides a hollow-core microstructure optical fiber preform, an optical fiber, and a method for manufacturing thereof. An objective of the present disclosure is to introduce a support sheet into a nested structure unit of the hollow-core microstructure optical fiber preform, which not only increases the number of reflection surfaces without increasing the number of nested layers of glass tubes, but also achieves a more accurate positioning by the support sheet and improves manufacturing accuracy as compared to a tangential structure of nested glass tubes, such that the following technical problems, difficulty in controlling a curvature of reflection surfaces, low manufacturing accuracy, large difference between actual loss and theoretical loss, or poor batch consistency, in related anti-resonance optical fibers, caused by increasing the number of layers of nested microstructure units in order to increase the number of reflection surfaces, are solved.

Hollow-core microstructure optical fiber preform, optical fiber and method for manufacturing thereof

A method for forming a multi-material mechanical functional member in additive manufacturing. The method includes the following steps: S: dividing an object to be formed into a plurality of portions, analyzing and measuring mechanical properties of each portion, and constructing a unit cell library; S: forming a lattice structure by using a unit cell structure in the unit cell library to obtain the lattice structure corresponding to each portion; S: selecting a raw material of the lattice structure, measuring and comparing mechanical properties of each lattice structure with the mechanical properties of each portion of the object to be formed, where when the mechanical properties of each portion are satisfied, the lattice structure is the required lattice structure, otherwise, step Sis repeated; and S: forming a three-dimensional model by a method of additive manufacturing to accordingly obtain the required object to be formed.

Method for forming multi-material mechanical functional member in additive manufacturing and product

A low-dispersion single-mode optical fiber includes a core and a cladding covering the core. The core has a relative refractive index difference of 0.30-0.65% and a radius of 2.5-4.5 &#x3bc;m. The cladding layer including 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 &#x2212;0.70% to &#x2212;0.30% and a radius of 4.5-7.5 &#x3bc;m. The second cladding layer covers the first cladding layer, and has a relative refractive index difference of &#x2212;0.20% to 0.25% and a radius of 7.0-12.0 &#x3bc;m. The third cladding layer covers the second cladding layer, and has a relative refractive index difference of &#x2212;0.60% to 0.00% and a radius of 10.0-20.0 &#x3bc;m. The outer cladding covers the third cladding layer, and is a layer made of pure silicon dioxide glass.

Low-dispersion single-mode optical fiber

A single-mode fiber with ultralow attenuation includes a core layer and cladding layers. The cladding layers includes an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary cladding layer. The core layer has a radius of 3.9-4.8 &#x3bc;m and a relative refractive index difference of &#x2212;0.08% to 0.10%. The inner cladding layer has a radius of 9-14 &#x3bc;m and a relative refractive index difference of &#x2212;0.40% to &#x2212;0.15%. The trench cladding layer has a radius of 13-25 &#x3bc;m and a refractive index difference of &#x2212;0.7% to &#x2212;0.3%. The auxiliary outer cladding layer has a radius of 30-50 &#x3bc;m and a relative refractive index difference of &#x2212;0.4% to &#x2212;0.15%. The outer cladding layer is a pure silicon dioxide glass layer.

Single-mode fiber with ultra low attenuation

An optical fiber with ultra-low attenuation and large effective-area includes a core layer and cladding layers. The cladding layers have an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The core layer has a radius of 4.8-6.5 &#x3bc;m, and a relative refractive index difference of &#x2212;0.06% to 0.10%. The inner cladding layer has a radius of 9-15 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.40% to &#x2212;0.15%. The trench cladding layer has a radius of about 12-17 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.8% to &#x2212;0.3%. The auxiliary outer cladding layer has a radius of about 37-50 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.6% to &#x2212;0.25%. The outer cladding layer is a pure silicon-dioxide glass layer.

Single-mode optical fiber with ultra low attenuation and large effective area

An optical fiber with ultra-low attenuation and bend insensitivity includes a core layer and cladding layers. The cladding layers have an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The core layer has a radius of 3.0-3.9 &#x3bc;m, and a relative refractive index difference of &#x2212;0.04% to 0.12%. The inner cladding layer has a radius of 8-14 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.35% to &#x2212;0.10%. The trench cladding layer has a radius of about 14-20 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.6% to &#x2212;0.2%. The auxiliary outer cladding layer has a radius of about 35-50 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.4% to &#x2212;0.15%. The outer cladding layer is a pure silicon-dioxide glass layer.

Single mode optical fiber with ultra-low attenuation and bend insensibility

A bending-insensitive single-mode fiber with ultralow attenuation includes a core layer and cladding layers. The cladding layers includes an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary cladding layer. The core layer has a radius of 3.0 to 3.9 &#x3bc;m and a relative refractive index of &#x2212;0.04% to 0.12%. The inner cladding layer has a radius of 8 to 14 &#x3bc;m and a relative refractive index &#x2212;0.35% to &#x2212;0.10%. The trench cladding layer has a radius of 14 to 20 &#x3bc;m and a relative refractive index of &#x2212;0.6% to &#x2212;0.2%. The auxiliary outer cladding layer has a radius of 35 to 50 &#x3bc;m and a relative refractive index of &#x2212;0.4% to &#x2212;0.15%. The outer cladding layer is a pure silica glass layer.

Bending-insensitive single-mode fiber with ultra low attenuation

A doping optimized single-mode optical fiber with ultra low attenuation includes a core layer and cladding layers. The cladding layers has an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The content of fluorine in the core layer is &#x2264;0.5 wt %, &#x394;Ge&#x2264;0.12%, &#x394;n&#x2264;0.12%. The content of fluorine in the inner cladding layer is 0.5-1.5 wt %, &#x394;n&#x2264;&#x2212;0.14%. The content of fluorine in the trench cladding layer is 1-3 wt %, &#x394;n&#x2264;&#x2212;0.25%. The content of fluorine in the auxiliary outer cladding layer is 0.5-2 wt %, &#x394;n&#x2264;&#x2212;0.14%. The outer cladding layer is a pure silicon dioxide glass layer and/or a metal-doped silicon dioxide glass layer.

Doping optimized single-mode optical fiber with ultra low attenuation

A single-mode fiber with an ultra-low attenuation and a large effective area includes a core layer having a radius of 4.8 to 6.5 and a relative refractive index difference &#x394;nof &#x2212;0.06% to 0.10%, and cladding layers. The cladding layers includes an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary cladding layer. The inner cladding layer has a radius of 9 to 15 &#x3bc;m and a relative refractive index difference of &#x2212;0.40% to &#x2212;0.15%. The trench cladding layer has a radius of 12 to 17 &#x3bc;m and a relative refractive index difference of &#x2212;0.8% to &#x2212;0.3%. The auxiliary outer cladding layer has a radius of 37 to 50 &#x3bc;m and a relative refractive index difference of &#x2212;0.6% to &#x2212;0.25%. The outer cladding layer is a pure-silicon-dioxide glass layer.

Single-mode fiber with ultralow attenuation and large effective area

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.

Bending insensitive single-mode optical fiber

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 6.5&#xd7;10. For the inner cladding layer, the diameter is 16.5-20 &#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 33-40 &#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.

Bending insensitive single mode optical fiber

Growing community of inventors

Hubei, China

Lei Zhang