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：US09647413B2

公开(公告)日：2017-05-09

申请号：US14909441

申请日：2014-08-21

Applicant: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD.

Inventor： Cheng Du ,  Wei Chen ,  Shiyu Li ,  Yili Ke ,  Qi Mo ,  Tao Zhang ,  Wenyong Luo ,  Kun Du ,  Rong Dan

IPC: H01S3/094 ,  C03B37/012 ,  C03B37/027 ,  H01S3/067 ,  C03B37/025

CPC classification number: H01S3/094019 ,  C03B37/01205 ,  C03B37/01228 ,  C03B37/0253 ,  C03B37/027 ,  C03B2201/34 ,  C03B2203/02 ,  C03B2203/10 ,  C03B2203/32 ,  C03B2203/40 ,  C03B2205/40 ,  H01S3/06729 ,  H01S3/06737 ,  H01S3/094053

Abstract: Provided are a high-efficiency parallel-beam laser optical fiber drawing method and optical fiber, the method including the steps of: S1: providing base planes on the side surfaces of both a gain optical fiber preform and a pump optical fiber preform, inwardly processing the base plane of the gain optical fiber preform to make a plurality of ribs protrude, and inwardly providing a plurality of grooves on the base plane of the pump optical fiber preform; S2: embedding the ribs into the grooves, tapering and fixing one end of the combination of the ribs and the grooves to form a parallel-beam laser optical fiber preform; S3: drawing the parallel-beam laser optical fiber preform into parallel-beam laser optical fibers. The process has high repeatability, and the obtained parallel-beam laser achieves peelability of pump optical fibers in a set area, thus facilitating multi-point pump light injection of parallel-beam laser optical fibers.

公开(公告)号：US10689287B2

公开(公告)日：2020-06-23

申请号：US15769342

申请日：2016-10-21

Applicant: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD

Inventor： Cheng Du ,  Wenyong Luo ,  Lei Yan ,  Tao Zhang ,  Chao Chen ,  Yili Ke ,  Ming Kong ,  Jie Zhang ,  Zhijian Liu ,  Lifeng Liu

IPC: C03B37/012 ,  C03B37/018

Abstract: A method for preparing a doped optical fibre preform includes formulating, a rare earth material or a functional metal material and a co-doping agent into a doping solution, mixing a high-purity quartz powder with the doping solution, drying same at a temperature of 100° C.-150° C. for 12-48 hours, crushing and screening the same to obtain a doped quartz powder; depositing the doped quartz powder onto the surface of a target rod to form a doped core layer; replacing the doped quartz powder with the high-purity quartz powder, and depositing the high-purity quartz powder onto the surface of the doped core layer to form a quartz outer cladding; and removing the target rod, and gradually collapsing the entirety formed from the doped core layer and the quartz outer cladding at a high temperature to obtain the doped optical fibre preform.