公开(公告)号：US09739936B2

公开(公告)日：2017-08-22

申请号：US15317102

申请日：2015-11-03

Applicant: WUHAN RESEARCH INSTITUTE OF POSTS AND TELECOMMINICATIONS ,  FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD.

Inventor： Qi Mo ,  Huang Yu ,  Wen Chen ,  Cheng Du ,  Zhiqiang Yu ,  Dongxiang Wang ,  Bingfeng Cai

IPC: G02B6/036 ,  G02B6/028

CPC classification number: G02B6/03666 ,  G02B6/0288

Abstract: 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 (1), a fluorine-doped quartz inner cladding (2), a fluorine-doped quartz second core layer (3), a fluorine-doped quartz depressed cladding (4) and a fluorine-doped quartz outer cladding (5); germanium element is not doped within the core layer (1), the refractive index of the core layer (1) 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 (1) and the fluorine-doped quartz inner cladding (2) is 0.3% to 0.9%; the relative refractive index difference of the fluorine-doped quartz inner cladding (2) with respect to synthetic quartz is −0.3% to −0.5%; the difference in relative refractive index between the fluorine-doped quartz second core layer (3) and the fluorine-doped quartz inner cladding (2) is 0.05% to 0.2%; the difference in relative refractive index between the fluorine-doped quartz depressed cladding (4) and the fluorine-doped quartz inner cladding (2) is −0.1% to −0.5%; the relative refractive index difference of the fluorine-doped quartz outer cladding (5) with respect to synthetic quartz is −0.3% to −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.

公开(公告)号：US10295737B2

公开(公告)日：2019-05-21

申请号：US15766837

申请日：2016-10-21

Applicant: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD

Inventor： Qi Mo ,  Lijie Huang ,  Huang Yu ,  Cheng Liu ,  Wen Chen ,  Zhiqiang Yu ,  Dongxiang Wang ,  Bingfeng Cai ,  Liming Chen ,  Huiping Shi

IPC: G02B6/036 ,  G02B6/02 ,  G02B1/04

Abstract: 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%.