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：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%.

公开(公告)号：US09726817B2

公开(公告)日：2017-08-08

申请号：US15317398

申请日：2015-11-03

Applicant: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD. ,  Wuhan Fiberhome Ruiguang Technology CO., LTD.

Inventor： Wenyong Luo ,  Zhijian Liu ,  Yili Ke ,  Qi Mo ,  Fuming Hu ,  Qiong Lei ,  Zhiwen Kang ,  Rong Dan ,  Lei Zhao

IPC: G02B6/36 ,  G02B6/024 ,  G02B6/036 ,  G02F1/01 ,  G02B6/028 ,  G02B6/02

CPC classification number: G02B6/024 ,  C03B37/01217 ,  C03B2203/31 ,  C03C25/1065 ,  G02B6/02395 ,  G02B6/0286 ,  G02B6/036 ,  G02B6/03688 ,  G02B6/03694 ,  G02F1/0134

Abstract: Disclosed is a small-diameter polarization maintaining optical fiber, which relates to the field of special optical fibers. The small-diameter polarization maintaining optical fiber comprises a quartz optical fiber (5); the periphery thereof is provided with an inner coating (6) and an outer coating (8); the interior of the quartz optical fiber (5) is provided with an optical fiber core layer (1) and a quartz cladding (2); two stress zones (4) are arranged between the optical fiber core layer (1) and the quartz cladding (2); a buffer coating (7) is arranged between the inner coating (6) and the outer coating (8); the periphery of each stress zone (4) is provided with a buffer layer (3) which is concentric with the stress zone (4); when a working wavelength of a small-diameter polarization maintaining optical fiber is 1310 nm, the attenuation thereof reaches less than 0.5 dB/km, and the crosstalk reaches −35 dB/km; and when the working wavelength of the small-diameter polarization maintaining optical fiber is 1550 nm, the attenuation thereof reaches less than 0.4 dB/km, and the crosstalk reaches −30 dB/km. The optical fiber not only has excellent stability characteristics of attenuation and crosstalk, but also has the excellent stability characteristic of long-term operation, and can provide a better optical fiber ring for research on a high-precision optical fiber gyroscope, thereby laying the foundation for the development directions of miniaturization and high precision of the optical fiber gyroscope.