公开(公告)号：US20130336343A1

公开(公告)日：2013-12-19

申请号：US13973051

申请日：2013-08-22

Applicant: Furukawa Electric Co., Ltd.

Inventor： Ryo MIYABE ,  Keiichi Aiso

IPC: H01S3/067 ,  G02B6/036

CPC classification number: H01S3/06716 ,  C03B37/01211 ,  C03B37/01433 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/36 ,  C03B2201/50 ,  C03B2201/54 ,  C03B2203/223 ,  C03B2203/23 ,  G02B6/03633 ,  H01S3/06733 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/1618 ,  H01S3/1693 ,  H01S3/176

Abstract: An optical fiber has: a core made of silica glass in which a rare earth element and aluminum have been added; an inner cladding layer that is formed around the core, is made of silica glass in which at least any one of an alkali metal and an alkali earth metal has been added, and has a refractive index lower than a refractive index of the core; and an outer cladding layer that is formed around the inner cladding layer and has a refractive index lower than the refractive index of the inner cladding layer.

Abstract translation: 光纤具有：添加了稀土元素和铝的石英玻璃制成的芯; 在芯部周围形成的内包层由石英玻璃制成，其中添加了碱金属和碱土金属中的至少一种，并且折射率低于芯的折射率; 以及外包层，其形成在所述内包层周围并且具有低于所述内包层的折射率的折射率。

公开(公告)号：US20160347645A1

公开(公告)日：2016-12-01

申请号：US15231896

申请日：2016-08-09

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Tomohiro GONDA ,  Ryo MIYABE ,  Katsunori IMAMURA ,  Tsunetoshi SAITO ,  Ryuichi SUGIZAKI

IPC: C03B37/012 ,  C03B37/025

CPC classification number: C03B37/01222 ,  C03B37/025 ,  C03B2203/23 ,  G02B6/02042

Abstract: A production method of an optical fiber preform includes: preparing a plurality of bar-shaped first preforms and a plurality of second preforms including through holes having substantially same shape with a shape of outer periphery of a cross section of the first preform, the cross section being orthogonal to a major axis of the first preform; and an assembly step of: matching the through holes of the second preforms to make communication holes; and inserting, through each of the communication holes, at least two of the first preforms arranged side by side in a direction of the major axis such that the second preforms and the first preforms are fitting each other. In at least one position in the direction of the major axis of the communication holes, a position where the second preforms contact with each other differs from a position where the first preforms contact with each other.

Abstract translation: 光纤预制棒的制造方法包括：准备多个棒状的第一预成型体和多个第二预成型体，所述多个第二预成型体包括具有与第一预成型体的截面形状相同形状的通孔，截面积 正交于第一预型件的长轴; 以及组装步骤：使所述第二预成型体的通孔匹配以形成连通孔; 以及通过每个所述连通孔插入沿所述长轴方向并排布置的至少两个所述第一预制件，使得所述第二预制件和所述第一预制件彼此配合。 在连通孔的长轴方向的至少一个位置上，第二预成型件彼此接触的位置与第一预成型件彼此接触的位置不同。

公开(公告)号：US20150329404A1

公开(公告)日：2015-11-19

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 ,  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.

Abstract translation: 一种制造玻璃预制件的方法，包括：形成由沉积在起始材料上的内部沉积烟灰和沉积在内部沉积烟灰外部的外部沉积烟灰构成的多孔玻璃烟灰; 并且在形成之后，在掺杂氟的同时烧结多孔玻璃烟炱，以形成包括内玻璃部分和外玻璃层的玻璃体。 在烧结时掺杂有内部沉积炭黑的氟量等于或大于0g / cm 3，并且小于掺杂了外部沉积烟炱的氟的量。

公开(公告)号：US20160075590A1

公开(公告)日：2016-03-17

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 ,  C03B37/027 ,  C03B37/018

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.

Abstract translation: 光纤预制棒的制造方法包括首先制备具有多个玻璃预制件的第一预制件和设置在多个玻璃预制件之间的第一包层部分，并且首先布置第二包层部分以围绕第一预制件。 在第一次排列时，将材料气体和燃烧气体从燃烧器喷出以产生玻璃颗粒。 第一预成型件和燃烧器在第一预制件的纵向上相对于彼此移动。 玻璃颗粒沉积在第一预型件上。

公开(公告)号：US20190391323A1

公开(公告)日：2019-12-26

申请号：US16561656

申请日：2019-09-05

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Ryo MIYABE ,  Keiichi AISO

IPC: G02B6/028 ,  G02B6/02 ,  G02B6/036 ,  C03B37/018 ,  C03B37/03 ,  C03C13/04

Abstract: Provided are an optical fiber and a manufacturing method of the optical fiber that can reduce transmission loss even when drawing is performed at a high tension and a high rate. 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.