公开(公告)号：US09739935B2

公开(公告)日：2017-08-22

申请号：US15083957

申请日：2016-03-29

Applicant: FUJIKURA LTD.

Inventor： Tatsuya Kishi ,  Sho Endo ,  Takayuki Kitamura

IPC: G02B6/028 ,  C03B37/014 ,  G02B6/036 ,  G02B6/02 ,  C03B37/018

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 Δ 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.

公开(公告)号：US09395485B2

公开(公告)日：2016-07-19

申请号：US13849319

申请日：2013-03-22

Applicant: FUJIKURA LTD.

Inventor： Takayuki Kitamura ,  Akihito Imase

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

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。