Fiberhome Telecommunication Technologies Co., Ltd

Wuhan Research Institute of Posts and Telecommunications

Fiberhome Telecommunications Technologies Co., Ltd.

Wuhan Research Institute of Post and Telecommunications

Dongxiang Wang

Wen Qing Chen

Qi Mo

Zhiqiang Yu

Bingfeng Cai

Huang Yu

Wei Chen

Peng Hu

Wen Chen

Shiyu Li

Wenyong Luo

Cheng Du

Fuming Hu

Daoyu Lei

Cheng Liu

Wenjun Huang

Liming Chen

Lijie Huang

Huiping Shi

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

A large mode field active optical fiber and manufacture method thereof is provided. The large mode field active optical fiber is formed by drawing a fiber core (), a quartz glass internal cladding (), a quartz glass outer cladding (), and a coating (). The quartz glass internal cladding (), the quartz glass outer cladding (), and the coating () are sequentially coated on the outer surface of the fiber core (). The fiber core () is formed by depositing, melting, and shrinking the tetrachlorosilane doped with rare earth ions in a quartz glass tube. The refractive index of the fiber core () is a graded refractive index, and the section parameter a thereof is 1&#x2266;&#x3b1;&#x2266;3. The appearance of the quartz glass inner cladding () is regular multi-prism shaped. The large mode field active optical fiber provides an approximate single mode output, increases the capacity of bearing the laser power for the active optical fiber, increases the quality of the light beam of the output laser, avoids the problem that there is a hollow ring in the output laser, increases the reliability of the high power fiber laser, increases the utilization efficiency of the raw materials, and reduces the manufacture cost.

Large mode field active optical fiber and manufacture method thereof

Growing community of inventors

Wuhan, China

Dongxiang Wang