公开(公告)号：US11079537B2

公开(公告)日：2021-08-03

申请号：US16561656

申请日：2019-09-05

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Ryo Miyabe ,  Keiichi Aiso

IPC: C03B37/014 ,  C03B37/018 ,  C03B37/027 ,  C03C3/06 ,  C03C13/04 ,  C03C25/104 ,  C03C25/1065 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  C03B37/03

Abstract: An optical fiber has a core to which chlorine is added and a clad to which fluorine is added, chlorine of 9000 to 13000 ppm is added to the core, a relative refractive index difference Δ1 of the core to a pure silica glass is 0.09 to 0.13%, a relative refractive index difference Δ2 of the clad to a pure silica glass is −0.36 to −0.17%, a difference (Δ1-Δ2) between the relative refractive index difference Δ1 of the core and the relative refractive index difference Δ2 of the clad is larger than or equal to 0.30%, a mode field diameter at wavelength 1.31 μm is 8.8 to 9.6 μm, and a stress difference occurring at an interface between the core and the clad is lower than or equal to 60 MPa.

公开(公告)号：US20140240819A1

公开(公告)日：2014-08-28

申请号：US14245672

申请日：2014-04-04

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yukihiro TSUCHIDA ,  Koichi Maeda ,  Yu Mimura ,  Hiroshi Matsuura ,  Kengo Watanabe ,  Tsunetoshi Saito ,  Ryo Miyabe ,  Shigeto Matsumoto ,  Keiichi Aiso ,  Ryuichi Sugizaki

IPC: H01S3/067 ,  G02B6/02

CPC classification number: H01S3/06708 ,  G02B6/02042 ,  H01S3/0064 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/094061 ,  H01S3/09415 ,  H01S3/1608 ,  H01S3/2383 ,  H01S2301/02 ,  H01S2301/04 ,  H04J14/02 ,  H04J14/04

Abstract: A multi-core amplification optical fiber includes a plurality of rare-earth-doped core portions and a cladding portion positioned at an outer periphery of the core portions and having refractive index lower than those of the core portions. When a doping concentration of the rare-earth of each of the core portions is 250 ppm to 2000 ppm, a relative refractive index difference of each of the core portions relative to the cladding portion is 0.5% to 2% at a wavelength of 1550 nm, and a core diameter of each of the core portions is 1 μm to 5 μm, a separation distance between each of the core portions and adjacent one of the core portions is set at equal to or larger than 30 μm and at equal to or smaller than 60 μm so that a light-crosstalk between the adjacent core portions is equal to or lower than −30 dB.

Abstract translation: 多芯放大光纤包括多个稀土掺杂芯部和位于芯部的外周的折射率低于芯部的折射率的包层部。 每个芯部的稀土的掺杂浓度为250ppm〜2000ppm时，芯部相对于包层部的相对折射率差在1550nm的波长为0.5〜2％ ，芯部的芯部直径为1μm〜5μm，芯部与相邻的一个芯部之间的间隔距离设定为30μm以上，等于或小于 使得相邻芯部之间的光串扰等于或低于-30dB。

公开(公告)号：US09783450B2

公开(公告)日：2017-10-10

申请号：US14810876

申请日：2015-07-28

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Ryo Miyabe ,  Keiichi Aiso ,  Naomi Kumano

IPC: C03B37/018 ,  C03B37/014 ,  G02B6/02

CPC classification number: C03B37/01853 ,  C03B37/0142 ,  C03B37/01446 ,  C03B37/01453 ,  C03B2201/12 ,  C03B2201/50 ,  C03B2203/22 ,  C03B2207/34 ,  C03B2207/50 ,  G02B6/02

Abstract: A method of producing a glass preform including: forming a porous glass soot configured by an inner deposition soot deposited on a start material and an outer deposition soot deposited outside the inner deposition soot; and sintering, after the forming, the porous glass soot while doping with fluorine to form a glass body including an inner glass portion and an outer glass layer. An amount of the fluorine, with which the inner deposition soot is doped at the sintering, is equal to or more than 0 g/cm3 and less than an amount of the fluorine with which the outer deposition soot is doped.

公开(公告)号：US09695079B2

公开(公告)日：2017-07-04

申请号：US14920534

申请日：2015-10-22

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Tomohiro Gonda ,  Katsunori Imamura ,  Ryo Miyabe ,  Ryuichi Sugizaki

IPC: C03B37/012 ,  C03B37/018 ,  G02B6/02 ,  C03B37/014 ,  C03B37/027

CPC classification number: C03B37/01222 ,  C03B37/01205 ,  C03B37/01234 ,  C03B37/01486 ,  C03B37/01493 ,  C03B37/018 ,  C03B37/027 ,  C03B2203/23 ,  C03B2203/34 ,  C03B2207/50 ,  G02B6/02042

Abstract: A production method of an optical fiber preform includes first preparing a first preform having a plurality of glass preforms and a first cladding portion disposed between the plurality of glass preforms, and first arranging a second cladding portion to surround the first preform. At the first arranging, a material gas and a combustion gas are ejected from a burner to produce glass particles. The first preform and the burner are moved relative to each other in a longitudinal direction of the first preform. The glass particles are deposited on the first preform.

公开(公告)号：US09225141B2

公开(公告)日：2015-12-29

申请号：US14245672

申请日：2014-04-04

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yukihiro Tsuchida ,  Koichi Maeda ,  Yu Mimura ,  Hiroshi Matsuura ,  Kengo Watanabe ,  Tsunetoshi Saito ,  Ryo Miyabe ,  Shigeto Matsumoto ,  Keiichi Aiso ,  Ryuichi Sugizaki

IPC: H01S3/094 ,  H01S3/067 ,  G02B6/02 ,  H04J14/02 ,  H04J14/04 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/23 ,  H01S3/00

CPC classification number: H01S3/06708 ,  G02B6/02042 ,  H01S3/0064 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/094061 ,  H01S3/09415 ,  H01S3/1608 ,  H01S3/2383 ,  H01S2301/02 ,  H01S2301/04 ,  H04J14/02 ,  H04J14/04

Abstract: A multi-core amplification optical fiber includes a plurality of rare-earth-doped core portions and a cladding portion positioned at an outer periphery of the core portions and having refractive index lower than those of the core portions. When a doping concentration of the rare-earth of each of the core portions is 250 ppm to 2000 ppm, a relative refractive index difference of each of the core portions relative to the cladding portion is 0.5% to 2% at a wavelength of 1550 nm, and a core diameter of each of the core portions is 1 μm to 5 μm, a separation distance between each of the core portions and adjacent one of the core portions is set at equal to or larger than 30 μm and at equal to or smaller than 60 μm so that a light-crosstalk between the adjacent core portions is equal to or lower than −30 dB.

Abstract translation: 多芯放大光纤包括多个稀土掺杂芯部和位于芯部的外周的折射率低于芯部的折射率的包层部。 每个芯部的稀土的掺杂浓度为250ppm〜2000ppm时，芯部相对于包层部的相对折射率差在1550nm的波长为0.5〜2％ ，芯部的芯部直径为1μm〜5μm，芯部与相邻的一个芯部之间的间隔距离设定为30μm以上，等于或小于 使得相邻芯部之间的光串扰等于或低于-30dB。