METHOD FOR MANUFACTURING A GLASS CORE PREFORM FOR OPTICAL FIBRES.
    1.
    发明申请
    METHOD FOR MANUFACTURING A GLASS CORE PREFORM FOR OPTICAL FIBRES. 审中-公开
    用于制造用于光纤的玻璃核心预制件的方法。

    公开(公告)号:WO2017059928A1

    公开(公告)日:2017-04-13

    申请号:PCT/EP2015/073445

    申请日:2015-10-09

    申请人: PRYSMIAN S.P.A.

    IPC分类号: C03B37/014

    摘要: A method of manufacturing a glass core preform for optical fibres comprising: providing a porous soot core preform having a central longitudinal hole extending axially therethrough and an a/b ratio of from 0.20 to 0.40; simultaneously dehydrating and doping with fluorine the soot core preform at a temperature of from 1000°C to 1350°C by exposing it to an atmosphere containing a chlorine-containing gas and a fluorine-containing gas, the content of the fluorine- containing gas in the atmosphere being of from 0.01% to 0.50% by volume, and simultaneously consolidating the soot core preform and closing the central longitudinal hole by exposing the soot core preform to an atmosphere substantially devoid of fluorine and of chlorine at a consolidation temperature of from 1500°C to 1650°C, while reducing the pressure down the central hole, thereby forming a glass core preform.

    摘要翻译: 一种制造用于光纤的玻璃纤维预制棒的方法,包括:提供具有轴向穿过其中延伸的中心纵向孔的多孔烟灰芯预制件和a / b比为0.20至0.40; 同时通过暴露于含有含氯气体和含氟气体的气氛中,在1000℃至1350℃的温度下将烟灰芯预制件的氟脱水和掺杂,含氟气体的含量 气氛为0.01〜0.50体积%,同时固化烟灰芯预制件,并通过将烟灰芯预制件暴露于基本上不含氟和氯的气氛中并在1500°的固结温度下封闭中心纵向孔 同时降低中心孔的压力,由此形成玻璃纤芯预制件。

    OPTICAL FIBER CONTAINING ALKALI METAL OXIDE
    3.
    发明申请
    OPTICAL FIBER CONTAINING ALKALI METAL OXIDE 审中-公开
    包含碱金属氧化物的光纤

    公开(公告)号:WO2008024255A3

    公开(公告)日:2008-10-02

    申请号:PCT/US2007018081

    申请日:2007-08-15

    IPC分类号: G02B6/02

    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 K 2 O, Na 2 O, LiO 2 , Rb 2 O, Cs 2 O 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 1400nm chromatic dispersion at 1550nm between about 13 and 19 ps/nm/km and a zero dispersion wavelength less than about 1324nm. 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,其具有包含碱金属氧化物二氧化硅基核的二氧化硅基核,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。

    ALKALI AND FLUORINE DOPED OPTICAL FIBER
    4.
    发明申请
    ALKALI AND FLUORINE DOPED OPTICAL FIBER 审中-公开
    阿尔卡里和氟光纤光纤

    公开(公告)号:WO2006112918A1

    公开(公告)日:2006-10-26

    申请号:PCT/US2006/004299

    申请日:2006-02-06

    IPC分类号: G02B6/00

    摘要: Disclosed is an optical fiber having a core of SiO 2 doped with fluorine and an alkali metal oxide dopant. The alkali metal oxide is selected from the group consisting of K, Na, Li, Cs and Rb and is provided in amount of at least 20 ppm wt. %. The fiber has an inner cladding surrounding the core, which also includes fluorine. A relative refractive index of the inner cladding (Δ 2 %), measured relative to pure silica, is preferably between -0.39 % and -0.7 %. The fiber preferably exhibits attenuation at 1550 nm of less than or equal to 0.178 dB/km.

    摘要翻译: 公开了一种具有掺杂有氟和碱金属氧化物掺杂剂的SiO 2核的光纤。 碱金属氧化物选自K,Na,Li,Cs和Rb,其量为至少20ppm重量。 %。 纤维具有围绕芯的内包层,其还包括氟。 相对于纯二氧化硅测量的内包层的相对折射率(η<2%<2%)优选在-0.39%和-0.7%之间。 纤维优选在1550nm处表现出小于或等于0.178dB / km的衰减。

    BROMINE-DOPED SILICA GLASS OPTICAL FIBER AND METHOD OF PRODUCING IT
    5.
    发明申请
    BROMINE-DOPED SILICA GLASS OPTICAL FIBER AND METHOD OF PRODUCING IT 审中-公开
    溴掺杂的二氧化硅玻璃光纤及其生产方法

    公开(公告)号:WO2017112447A1

    公开(公告)日:2017-06-29

    申请号:PCT/US2016/066251

    申请日:2016-12-13

    摘要: Bromine doping of silica glass is demonstrated. Bromine doping can be achieved with SiBr4 as a precursor. Bromine doping can occur during heating, consolidation or sintering of a porous silica glass body. Doping concentrations of bromine increase with increasing pressure of the doping precursor and can be modeled with a power law equation in which doping concentration is proportional to the square root of the pressure of the doping precursor. Bromine is an updopant in silica and the relative refractive index of silica increases approximately linearly with doping concentration. Bromine can be used as a dopant for optical fibers and can be incorporated in the core and/or cladding regions. Core doping concentrations of bromine are sufficient to permit use of undoped silica as an inner cladding material in fibers having a trench in the refractive index profile. Co-doping of silica glass with bromine and chlorine is also demonstrated.

    摘要翻译: 证明了二氧化硅玻璃的溴掺杂。 溴掺杂可以用SiBr4作为前体来实现。 溴掺杂可以在多孔石英玻璃体的加热,固结或烧结过程中发生。 溴的掺杂浓度随着掺杂前体的压力增加而增加,并且可以用幂定律方程来模拟,其中掺杂浓度与掺杂前体的压力的平方根成比例。 溴是二氧化硅中的上升剂,二氧化硅的相对折射率随着掺杂浓度近似线性增加。 溴可以用作光纤的掺杂剂,并且可以掺入芯和/或包层区。 溴的核心掺杂浓度足以允许在具有折射率分布中的沟槽的纤维中使用未掺杂的二氧化硅作为内包层材料。 还证实了二氧化硅玻璃与溴和氯的共掺杂。

    METHOD FOR PRODUCING TETRAFLUOROSILANE
    7.
    发明申请
    METHOD FOR PRODUCING TETRAFLUOROSILANE 审中-公开
    生产四氯氟硅烷的方法

    公开(公告)号:WO2005030642A1

    公开(公告)日:2005-04-07

    申请号:PCT/JP2004/014419

    申请日:2004-09-24

    发明人: OKA, Masakazu

    IPC分类号: C01B33/107

    摘要: The invention relates to a method for producing tetrafluorosilane by decomposing hexafluorosilicic acid with sulfuric acid, which comprises: step 1 of decomposing hexafluorosilicic acid in concentrated sulfuric acid in the first reactor to give SiF 4 and HF and taking out the SiF 4 ; step 2 of transferring part of the concentrated sulfuric acid solution of step 1 containing HF into the second reactor to react the HF with silicon dioxide fed thereinto, thereby producing SiF 4 containing (SiF 3 ) 2 0; and step 3 of bringing the reaction product of step 2 containing (SiF 3 ) 2 O and SiF 4 to the first reactor to react (SiF 3 ) 2 O contained in the reaction product with HF to convert it into SiF 4 and then taking out the SiF4 along with SiF 4 formed in step 1. According to the invention, high-purity SiF 4 can be obtained with (SiF 3 ) 2 Obeing reduced, free from HF generated as a problematic side product in conventional method.

    摘要翻译: 本发明涉及通过用硫酸分解六氟硅酸生产四氟硅烷的方法,其包括:在第一反应器中分解六氟硅酸在浓硫酸中的步骤1,得到SiF 4和HF并取出SiF 4; 将部分含有HF的步骤1的浓硫酸溶液转移到第二反应器中以使HF与供给的二氧化硅反应,从而产生含有(SiF 3)20的SiF 4的步骤2; 和将含有(SiF 3)2 O和SiF 4的步骤2的反应产物引入第一反应器以使反应产物中含有的(SiF 3)2 O与HF反应以将其转化为SiF 4,然后与形成的SiF 4一起取出SiF 4的步骤3 根据本发明,通过(SiF 3)2可以获得高纯度的SiF 4,其在常规方法中不产生作为有问题的副产物的HF。