Production method of optical fiber preform and production method of optical fiber

    公开(公告)号:US09902643B2

    公开(公告)日:2018-02-27

    申请号:US15192590

    申请日:2016-06-24

    发明人: Seiichi Shinada

    IPC分类号: C03B37/014

    摘要: A production method of an optical fiber preform includes: forming a porous preform by depositing silica particles at an outer periphery of a core rod; and vitrifying the porous preform by conducting thermal treatment steps. At a first thermal treatment step that is an initial thermal treatment step of the thermal treatment steps, the porous preform is heated so that internal temperatures at two end portions in a longitudinal direction of the porous preform increase before an internal temperature of a center portion in the longitudinal direction increases.

    METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS
    6.
    发明申请
    METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS 审中-公开
    用选择性扩散层形成光纤预制件的方法

    公开(公告)号:US20140174133A1

    公开(公告)日:2014-06-26

    申请号:US14107259

    申请日:2013-12-16

    IPC分类号: C03B37/014 G02B6/036

    摘要: Methods for forming optical fiber preforms are disclosed. According to one embodiment, a method for forming an optical fiber preform includes forming a preform core portion from silica-based glass soot. The silica-based glass soot may include at least one dopant species for altering an index of refraction of the preform core portion. A selective diffusion layer of silica-based glass soot may be formed around the preform core portion to form a soot preform. The selective diffusion layer may have an as-formed density greater than the density of the preform core portion. A diffusing species may be diffused through the selective diffusion layer into the preform core portion. The soot preform may be sintered such that the selective diffusion layer has a barrier density which is greater than the as-formed density and the selective diffusion layer prevents diffusion of the at least one dopant species through the selective diffusion layer.

    摘要翻译: 公开了形成光纤预制棒的方法。 根据一个实施例,用于形成光纤预制棒的方法包括从二氧化硅基玻璃烟炱形成预制芯部分。 二氧化硅基玻璃烟炱可以包括至少一种用于改变预制核心部分的折射率的掺杂物种类。 二氧化硅基玻璃烟炱的选择性扩散层可以在预制核心部分周围形成,以形成烟炱预制件。 选择性扩散层可以具有大于预制核心部分的密度的形成密度。 扩散物质可以通过选择性扩散层扩散到预制核心部分中。 烟炱预制件可以烧结,使得选择性扩散层具有大于形成密度的势垒密度,并且选择性扩散层防止至少一种掺杂剂物质通过选择性扩散层的扩散。

    Optical fiber containing alkali metal oxide
    7.
    发明授权
    Optical fiber containing alkali metal oxide 有权
    含有碱金属氧化物的光纤

    公开(公告)号:US07536076B2

    公开(公告)日:2009-05-19

    申请号:US11801472

    申请日:2007-05-10

    IPC分类号: G02B6/00

    摘要: Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, LiO2, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 50 and 500 ppm by weight, said core further comprising chlorine and fluorine, wherein the average concentration of fluorine in said core is greater than the average concentration of alkali metal oxide in said core and the average concentration of chlorine in said core is greater than the average concentration of alkali metal oxide in said core; and a silica-based cladding surrounding and directly adjacent the core. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained.

    摘要翻译: 公开了一种光纤,其具有二氧化硅基核,其包含选自K2O,Na2O,LiO2,Rb2O,Cs2O及其混合物的碱金属氧化物,其中所述芯中的平均浓度为约50至500重量ppm, 所述芯还包含氯和氟,其中所述芯中的氟的平均浓度大于所述芯中的碱金属氧化物的平均浓度,并且所述芯中的平均氯浓度大于碱金属氧化物的平均浓度 说核心; 以及围绕并直接邻近芯的二氧化硅基包层。 通过适当地选择芯和包层中的碱金属氧化物掺杂剂的浓度,可以获得低损耗光纤。

    Optical fiber containing alkali metal oxide
    8.
    发明申请
    Optical fiber containing alkali metal oxide 审中-公开
    含有碱金属氧化物的光纤

    公开(公告)号:US20080050086A1

    公开(公告)日:2008-02-28

    申请号:US11891274

    申请日:2007-08-09

    IPC分类号: G02B6/00

    摘要: Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, LiO2, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 50 and 1000 ppm by weight, and a silica-based cladding surrounding and directly adjacent the core, said fiber comprising a cable cutoff less than 1400 nm chromatic dispersion at 1550 nm between about 13 and 19 ps/nm/km and a zero dispersion wavelength less than about 1324 nm. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained.

    摘要翻译: 公开了一种具有二氧化硅基核的光纤,其包含碱金属氧化物二氧化硅基核,所述芯包含选自K 2 O,Na 2 O, 2 O,LiO 2,Rb 2 O,Cs 2 O及其混合物,其中所述芯中的平均浓度在约 50和1000重量ppm,以及围绕并直接邻近芯的二氧化硅基包层,所述光纤包括在1550nm处在约13和19ps / nm / km之间的小于1400nm色散的电缆,并且零色散波长 小于约1324nm。 通过适当地选择芯和包层中的碱金属氧化物掺杂剂的浓度,可以获得低损耗光纤。

    High pressure fluorine method for producing preform for optical fiber
    10.
    发明授权
    High pressure fluorine method for producing preform for optical fiber 失效
    用于生产光纤预制棒的高压氟法

    公开(公告)号:US5053068A

    公开(公告)日:1991-10-01

    申请号:US526522

    申请日:1990-05-21

    IPC分类号: G02B6/00 C03B37/014

    摘要: A method for producing a glass preform for use in the fabrication of an optical fiber, including the steps of forming a glass soot preform from a glass-forming raw material and heating the soot preform to vitrify it, the soot preform being heated in an atmosphere comprising SiF.sub.4 under pressure higher than 1 atm. for a period of time sufficient to add fluorine, between the formation of the soot preform and the vitrification of it, fluorine being added at a high rate and in a large amount.

    摘要翻译: 一种用于制造用于制造光纤的玻璃预制棒的方法,包括以下步骤:从玻璃形成原料形成玻璃烟炱预制件并加热烟炱预制件使其玻璃化,烟炱预制件在气氛中加热 包括在高于1atm的压力下的SiF 4。 在足以添加氟的时间段之间,在形成烟炱预制品和玻璃化之间,氟以高速率和大量添加。