Fiberhome Telecommunication Technologies Co., Ltd

Wuhan Research Institute of Posts and Telecommunications

Fiberhome Fujikura Optic Technology Co., Ltd

Wuhan Research Institute of Post and Telecommunications

Bingfeng Cai

Wen Qing Chen

Qi Mo

Dongxiang Wang

Huang Yu

Zhiqiang Yu

Wen Chen

Cheng Du

Cheng Luo

Liming Chen

Huiping Shi

Lijie Huang

Cheng Liu

Jing Yue

Chuyu Peng

The present invention relates to the field of single-mode optical fibers and discloses a bending-insensitive, radiation-resistant single-mode optical fiber, sequentially including from inside to outside: a core, inner claddings, and an outer cladding, all made from a quartz material. The inner claddings comprise, from inside to outside, a first fluorine-doped inner cladding and a second fluorine-doped inner cladding. The core and the first fluorine-doped inner cladding are not doped with germanium. The respective concentrations of other metal impurities and phosphorus are less than 0.1 ppm. By mass percent, the core has a fluorine dopant content of 0-0.45% and a chlorine content of 0.01-0.10%; the first fluorine-doped inner cladding has a fluorine concentration of 1.00-1.55%; and the second fluorine-doped inner cladding has a fluorine concentration of 3.03-5.00%.

Bending-insensitive, radiation-resistant single-mode optical fiber

A low-loss few-mode fiber relates to the technical field of optical communications and related sensing devices, and includes, from inside to outside, a core layer (), a fluorine-doped quartz inner cladding (), a fluorine-doped quartz second core layer (), a fluorine-doped quartz depressed cladding () and a fluorine-doped quartz outer cladding (); germanium element is not doped within the core layer (), the refractive index of the core layer () is in gradient distribution, and the distribution is a power-exponent distribution; the maximum value of difference in relative refractive index between the core layer () and the fluorine-doped quartz inner cladding () is 0.3% to 0.9%; the relative refractive index difference of the fluorine-doped quartz inner cladding () with respect to synthetic quartz is &#x2212;0.3% to &#x2212;0.5%; the difference in relative refractive index between the fluorine-doped quartz second core layer () and the fluorine-doped quartz inner cladding () is 0.05% to 0.2%; the difference in relative refractive index between the fluorine-doped quartz depressed cladding () and the fluorine-doped quartz inner cladding () is &#x2212;0.1% to &#x2212;0.5%; the relative refractive index difference of the fluorine-doped quartz outer cladding () with respect to synthetic quartz is &#x2212;0.3% to &#x2212;0.5%. The transmission loss of optical signals of the linear polarization modes that are supported by the few-mode fiber and the relay cost are reduced.

Low-loss few-mode fiber

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Wuhan, China

Bingfeng Cai