公开(公告)号：US20160209585A1

公开(公告)日：2016-07-21

申请号：US15083957

申请日：2016-03-29

Applicant: FUJIKURA LTD.

Inventor： Tatsuya KISHI ,  Sho ENDO ,  Takayuki KITAMURA

IPC: G02B6/028 ,  G02B6/036 ,  C03B37/018 ,  G02B6/02

CPC classification number: G02B6/0281 ,  C03B37/014 ,  C03B37/018 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2203/22 ,  C03B2203/23 ,  C03B2203/26 ,  G02B6/02009 ,  G02B6/02028 ,  G02B6/028 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/0365

Abstract: An optical fiber includes a core, and a clad surrounding an outer circumference of the core, in which a first relative refractive index difference Δ1a is greater than 0, a second relative refractive index difference Δ1b is greater than 0, the first relative refractive index difference Δ1a is greater than the second relative refractive index difference Δ1b, the first relative refractive index difference Δ1a and the second relative refractive index difference Δ1b satisfy a relationship denoted by the following expression: 0.20≦(Δ1a−Δ1b)/Δ1a≦0.88, and a refractive index profile A of the core in an entire region of a section of 0≦r≦r1 as a function Δ(r) of a distance r from a center of the core in the radial direction is denoted by the following expression: Δ(r)=Δ1a−(Δ1a−Δ1b)r/r1.

Abstract translation: 光纤包括芯和围绕芯的外周的包层，其中第一相对折射率差Dgr1a大于0，第二相对折射率差Dgr; 1b大于0，第一 相对折射率差Dgr1a1大于第二相对折射率差Dgr; 1b，第一相对折射率差Dgr1a1和第二相对折射率差Dgr1b满足由以下表达式表示的关系：0.20＆nlE （＆Dgr; 1a-＆Dgr; 1b）/＆Dgr; 1a＆nlE; 0.88，并且在0＆lt; nlE的截面的整个区域中的芯的折射率分布A;作为函数的函数＆Dgr（r） （r）=＆Dgr; 1a - （＆Dgr; 1a-＆Dgr; 1b）r / r1表示从径向方向的芯的中心的r。

公开(公告)号：US20130251322A1

公开(公告)日：2013-09-26

申请号：US13849319

申请日：2013-03-22

Applicant: FUJIKURA LTD.

Inventor： Takayuki KITAMURA ,  Akihito IMASE

IPC: G02B6/02

CPC classification number: G02B6/02 ,  C03B37/01446 ,  C03B37/0146 ,  C03B2201/50 ,  C03B2201/54

Abstract: A method of manufacturing a glass preform is provided. The method including, vaporizing an alkali metal compound or an alkali earth metal compound and being brought the alkali metal compound or the alkali earth metal compound into contact with a hydroxyl group on a surface of porous silica glass and dehydrating the porous silica glass, and sintering the dehydrated porous silica glass and forming a transparent glass body.

Abstract translation: 提供一种制造玻璃预制件的方法。 该方法包括使碱金属化合物或碱土金属化合物蒸发，并使碱金属化合物或碱土金属化合物与多孔二氧化硅玻璃表面的羟基接触并使多孔石英玻璃脱水，并烧结 脱水多孔石英玻璃，形成透明玻璃体。

公开(公告)号：US20150052952A1

公开(公告)日：2015-02-26

申请号：US14521617

申请日：2014-10-23

Applicant: FUJIKURA LTD.

Inventor： Takayuki KITAMURA

IPC: C03B37/014

CPC classification number: C03B37/01413 ,  C03B37/01807 ,  C03B37/01815 ,  C03B2201/06 ,  C03B2201/50 ,  C03B2201/54 ,  C03B2207/80 ,  C03B2207/90

Abstract: An apparatus for manufacturing a glass perform, includes: a dummy tube section, a reservoir portion, and a cooling portion; and a glass tube section in which particles of an alkali metal compound or an alkaline earth metal compound which have flowed into the glass tube section from the dummy tube section are heated by a second heat source which performs traverse, and oxides of the particles being deposited on an inner wall and dispersed in the glass tube section. In the cooling portion of the dummy tube section, vapor of the alkali metal compound or the alkaline earth metal compound generated by heating of a first heat source is cooled and condensed by a dry gas flowing into the dummy tube section, and thereby the particles are generated.

Abstract translation: 一种玻璃制造装置，包括：虚拟管部，储存部和冷却部; 以及玻璃管部分，其中由虚拟管部分流入玻璃管部分的碱金属化合物或碱土金属化合物的颗粒被进行横越的第二热源加热，并且沉积的颗粒的氧化物 在内壁上分散在玻璃管部分。 在虚拟管部的冷却部中，通过第一热源的加热而产生的碱金属化合物或碱土金属化合物的蒸气被流入虚拟管部的干燥气体冷却并冷凝， 生成。

公开(公告)号：US20140241686A1

公开(公告)日：2014-08-28

申请号：US13781041

申请日：2013-02-28

Applicant: FUJIKURA, LTD.

Inventor： Takayuki KITAMURA ,  Akihito IMASE ,  Munehisa FUJIMAKI

IPC: G02B6/036

CPC classification number: G02B6/02019 ,  G02B6/0365

Abstract: An optical fiber is provided. The optical fiber has a refractive index profile that includes a central core, an inner cladding layer, a trench layer, and an outer cladding layer. A trench layer is provided with a reduced refractive index. The optical fiber has a large effective area without having an increase of a cutoff wavelength, and exhibits low macrobending loss.

Abstract translation: 提供光纤。 光纤具有包括中心芯，内包层，沟槽层和外包层的折射率分布。 沟槽层具有降低的折射率。 光纤具有大的有效面积而不增加截止波长，并且表现出较小的弯曲损耗。