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

Applicant: SHOWA DENKO K.K. ,  OKA, Masakazu

Inventor： OKA, Masakazu

IPC: C01B33/107

CPC classification number: C03B37/01446 ,  B01D53/02 ,  C01B33/107 ,  C01B33/10705 ,  C01B33/10784 ,  C03B37/01453 ,  C03B2201/12 ,  C03C25/607

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2005021455A2

公开(公告)日：2005-03-10

申请号：PCT/US2004/028102

申请日：2004-08-27

Applicant: CORNING INCORPORATED ,  COFFEY, Calvin, T. ,  ANDERSON, James, G. ,  BOOKBINDER, Dana, C. ,  CHACON, Lisa, C. ,  ELLISON, Adam, J. ,  GAUSMAN, Gregory, G. ,  KHRAPKO, Rostislav, R. ,  LOGUNOV, Stephan, L. ,  MURTAGH, Michael, T. ,  OSTERHOUT, Clinton, D. ,  SABYASACHI, Sen ,  WHEDON, William, A.

Inventor： COFFEY, Calvin, T. ,  ANDERSON, James, G. ,  BOOKBINDER, Dana, C. ,  CHACON, Lisa, C. ,  ELLISON, Adam, J. ,  GAUSMAN, Gregory, G. ,  KHRAPKO, Rostislav, R. ,  LOGUNOV, Stephan, L. ,  MURTAGH, Michael, T. ,  OSTERHOUT, Clinton, D. ,  SABYASACHI, Sen ,  WHEDON, William, A.

IPC: C03C13/00

CPC classification number: G02B6/0228 ,  C03B37/01211 ,  C03B37/0124 ,  C03B37/014 ,  C03B37/01413 ,  C03B37/01446 ,  C03B37/0146 ,  C03B37/01466 ,  C03B37/01473 ,  C03B37/01807 ,  C03B37/01815 ,  C03B37/01838 ,  C03B37/01853 ,  C03B37/027 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/22 ,  C03B2201/31 ,  C03B2201/50 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2203/29 ,  C03B2207/90 ,  C03C3/06 ,  C03C13/045 ,  C03C13/046 ,  C03C13/048 ,  C03C2201/12 ,  C03C2201/31 ,  C03C2201/50 ,  G02B6/02242 ,  G02B6/02271 ,  G02B6/028 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/03694 ,  Y10T428/294

Abstract: Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (dl) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.

Abstract translation: 公开了一种光纤，其具有具有大于约0.002重量％的峰值的碱金属氧化物掺杂剂的芯。 ％且小于约0.1wt。 ％。 碱金属氧化物浓度随着光纤的半径而变化。 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。 还公开了几种制造光纤的方法，包括形成碱金属氧化物掺杂棒的步骤，并且添加额外的玻璃以形成拉伸性能。 优选地，拉伸预成型件具有最终外部尺寸（d2），其中杆的外部尺寸（d1）小于或等于最终外部尺寸（d2）的0.06倍。 在一个优选实施例中，将掺入碱金属氧化物的棒插入到预成型件的中心线孔中以形成组件。

公开(公告)号：WO2004060822A1

公开(公告)日：2004-07-22

申请号：PCT/US2003/038863

申请日：2003-12-08

Applicant: CORNING INCORPORATED

Inventor： BOEK, Heather, D. ,  PONADER, Carl, W.

IPC: C03B19/14

CPC classification number: C03B37/01446 ,  C03B2201/12 ,  C03B2201/31

Abstract: A method of forming an optical fiber by heat treating a consolidated glass article, doped with at least one refractive index-modifying dopant, at a temperature between about 1100?C and 1400?C and for a time between about 1 hour and 12 hours in a helium-containing atmosphere. The consolidated glass article is an optical fiber precursor. The optical fiber drawn from the heat treated consolidated glass article exhibits an attenuation lower than an optical fiber drawn from a substantially identical optical fiber precursor that has not been heat treated in accordance with the present invention.

Abstract translation: 通过在约1100℃至1400℃的温度下热处理掺杂有至少一种折射率修饰掺杂剂的固结玻璃制品并在约1小时至12小时之间的时间内形成光纤的方法， 含氦气氛。 固结的玻璃制品是光纤前体。 从经热处理的固结玻璃制品拉制的光纤的衰减比从本发明未经热处理的基本上相同的光纤前体引出的光纤低。

公开(公告)号：WO2004043870A1

公开(公告)日：2004-05-27

申请号：PCT/KR2003/002209

申请日：2003-10-21

Applicant: LG CABLE LTD. ,  JANG, Ki-Wan ,  LEE, Chan-Joo ,  PARK, Ji-Sang ,  SON, Soon-Il ,  KWON, Young-Il

Inventor： JANG, Ki-Wan ,  LEE, Chan-Joo ,  PARK, Ji-Sang ,  SON, Soon-Il ,  KWON, Young-Il

IPC: C03B37/018

CPC classification number: C03B37/01228 ,  C03B37/01446 ,  C03B37/01853 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/28 ,  C03B2201/31 ,  C03C25/6208 ,  C03C25/64

Abstract: A method for manufacturing an optical fiber preform including a dehydration process by photochemical reaction is provided. The method performs forming a clad and a core according to a predetermined refractive index profile by repeated deposition and sintering of soot particles by means of oxidation of soot generation gas, and a dehydration step for removing moisture and hydroxyl groups from a soot deposition region by means of photochemical reaction is executed between the deposition and sintering. The dehydration step activates dehydration gas into ionic or atomic state by irradiating light, in a wavelength range capable of inducing activation of the dehydration gas, from light source to the dehydration gas including chlorine and supplied to the soot deposition region, and then adsorbs the activated dehydration gas onto surface of the soot in order to induce dehydration reaction with moisture or hydroxyl groups.

Abstract translation: 提供了一种通过光化学反应制造包括脱水过程的光纤预制件的方法。 该方法通过烟灰发生气体的氧化反复沉积和烧结烟灰颗粒，根据预定的折射率分布形成包层和芯，以及通过手段从烟灰沉积区域除去水分和羟基的脱水步骤 在沉积和烧结之间进行光化学反应。 脱水步骤通过在能够引起脱水气体的激活的波长范围内从光源向包括氯的脱水气体照射光并将其供应到烟灰沉积区域，将脱水气体激活成离子或原子状态，然后吸附活化的 将烟气脱气到烟灰表面，以引起与水分或羟基的脱水反应。

公开(公告)号：WO03078338A8

公开(公告)日：2004-03-25

申请号：PCT/DK0300182

申请日：2003-03-18

Applicant: CRYSTAL FIBRE AS ,  JAKOBSEN CHRISTIAN ,  VIENNE GUILLAUME ,  HANSEN THEIS PETER

Inventor： JAKOBSEN CHRISTIAN ,  VIENNE GUILLAUME ,  HANSEN THEIS PETER

IPC: C03B37/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/016 ,  C03B37/018 ,  G02B6/16

CPC classification number: C03B37/016 ,  C03B37/01231 ,  C03B37/014 ,  C03B37/01446 ,  C03B37/01486 ,  C03B37/01493 ,  C03B37/018 ,  C03B37/01884 ,  C03B37/01892 ,  C03B2203/10 ,  C03B2203/14 ,  C03B2203/16 ,  C03B2203/42 ,  G02B6/02295

公开(公告)号：WO2003101900A1

公开(公告)日：2003-12-11

申请号：PCT/US2003/016040

申请日：2003-05-21

Applicant: CORNING INCORPORATED

Inventor： WALCZAK, Wanda J

IPC: C03B37/027

CPC classification number: C03B37/01446 ,  C03B37/0146 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/31 ,  Y02P40/57

Abstract: A method of producing a doped optical fiber preform from a silica-based preform is disclosed which includes, in a first gas exposure step, exposing the silica soot portion to a first gaseous environment containing a chlorine-containing compound for a time and at one or more temperatures below the consolidation temperature of the silica soot portion, in a second gas exposure step, exposing the silica soot portion to a second gaseous environment containing a second gaseous compound for a time and at one or more temperatures below the consolidation temperature of the silica soot portion, and in a third gas exposure step, exposing the silica soot portion to a third gaseous environment containing a chlorine-containing compound for a time and at one or more temperatures below the consolidation temperature of the silica soot portion and higher than at least one of the temperatures in the first gas exposure step.

Abstract translation: 公开了一种从基于二氧化硅的预制棒生产掺杂的光纤预制件的方法，其包括在第一气体暴露步骤中将二氧化硅烟灰部分暴露于含有含氯化合物的第一气体环境一段时间， 在第二气体暴露步骤中，在二氧化硅烟灰部分的固化温度以下的更高的温度，将二氧化硅烟灰部分暴露于含有第二气态化合物的第二气态环境一段时间，并且在低于二氧化硅的固结温度的一个或多个温度 烟灰部分，并且在第三气体暴露步骤中，将二氧化硅烟灰部分暴露于含有含氯化合物的第三气态环境一段时间，并且在低于二氧化硅烟灰部分的固化温度的一个或多个温度下，并且高于至少 第一气体暴露步骤中的温度之一。

公开(公告)号：WO03054589A2

公开(公告)日：2003-07-03

申请号：PCT/US0239814

申请日：2002-12-11

Applicant: CORNING INC

Inventor： ALLAN DOUGLAS C ,  BROWN JOHN T ,  CHACON LISA C ,  ELLISON ADAM J G ,  FAJARDO JAMES C ,  GRAY STUART ,  HOUSE KEITH L ,  KOCH KARL W III ,  POWERS DALE R ,  WEST JAMES A

IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02B6/02 ,  G02B6/036 ,  G02F1/35 ,  G02B

CPC classification number: C03C13/045 ,  C03B37/01413 ,  C03B37/01446 ,  C03B37/01807 ,  C03B37/01823 ,  C03B37/01853 ,  C03B2201/20 ,  C03B2201/22 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2207/30 ,  C03B2207/36 ,  C03C4/0042 ,  C03C13/046 ,  G02B6/02 ,  G02B6/02228 ,  G02B6/02271 ,  G02B6/03644 ,  G02B6/03677 ,  G02B6/03694

Abstract: An isotopically-altered, silica based optical fiber is provided having lower losses, broader bandwidth, and broader Raman gain spectrum characteristics than conventional silica-based fiber. A heavier, less naturally abundant isotope of silicon or oxygen is substituted for a lighter, more naturally abundant isotope to shift the infrared absorption to a slightly longer wavelength. In one embodiment, oxygen-18 is substituted for the much more naturally abundant oxygen-16 at least in the core region of the fiber. The resulting isotopically-altered fiber has a minimum loss of 0.044 dB/km less than conventional fiber, and a bandwidth that is 17 percent broader for a loss range between 0.044-0.034 dB/km. The fiber may be easily manufactured with conventional fiber manufacturing equipment by way of a plasma chemical vapor deposition technique. When a 50 percent substitution of oxygen-18 for oxygen-16 is made in the core region of the fiber, the Raman gain spectrum is substantially broadened.

Abstract translation: 提供了一种同位素改性的二氧化硅基光纤，其比传统的二氧化硅基光纤具有更低的损耗，更宽的带宽和更广泛的拉曼增益光谱特性。 更重，较不自然丰富的硅或氧的同位素代替较轻的，更自然的丰富的同位素，以将红外吸收转移到稍长的波长。 在一个实施方案中，氧-18至少在纤维的核心区域中替代天然丰富的氧-16。 所得到的同位素改变的光纤比常规光纤的损耗最小为0.044 dB / km，对于0.044-0.034 dB / km之间的损耗范围，宽带宽为17％。 纤维可以通过等离子体化学气相沉积技术容易地用传统的纤维制造设备制造。 当在纤维的纤芯区域中进行氧-16取代氧-16的50％时，拉曼增益谱显着扩大。

公开(公告)号：WO02051761A2

公开(公告)日：2002-07-04

申请号：PCT/US2001/049051

申请日：2001-12-17

IPC: C03B37/014 ,  C03C13/04 ,  C03C25/60 ,  G02B6/02 ,  C03B37/00

CPC classification number: C03C25/607 ,  C03B37/01446 ,  C03B37/0146 ,  C03B37/01486 ,  C03B2201/075 ,  C03B2201/22 ,  C03B2201/31 ,  C03C3/06 ,  C03C13/045 ,  C03C13/047 ,  C03C2201/21 ,  C03C2201/22 ,  C03C2203/54 ,  G02B6/02

Abstract: Optical waveguide fiber having low water peak as well as optical waveguide fiber preforms and methods of making optical waveguide fiber preforms from which low water peak and/or low hydrogen aged attenuation optical waveguide fibers are formed, including optical waveguide fiber and preforms made via OVD. The fibers may be hydrogen resistant, i.e. exhibit low hydrogen aged attenuation. A low water peak, hydrogen resistant optical waveguide fiber is disclosed which exhibits an optical attenuation at a wavelength of about 1383 nm which is less than or equal to an optical attenuation exhibited at a wavelength of about 1310 nm.

Abstract translation: 具有低水峰的光波导纤维以及光波导纤维预制件以及制造出低水峰值和/或低氢老化衰减光波导纤维的光波导纤维预制棒的方法，包括通过OVD制造的光波导纤维和预制棒。 纤维可以是耐氢性的，即表现出低氢老化衰减。 公开了一种低水峰，耐氢光波导纤维，其在约1383nm的波长处表现出光衰减，其小于或等于在约1310nm的波长处显示的光衰减。

公开(公告)号：WO0214231A3

公开(公告)日：2002-05-02

申请号：PCT/US0123353

申请日：2001-07-24

Applicant: YAZAKI CORP ,  KIRKBIR FIKRET ,  OTANI NATSUKI ,  RAYCHUDHURI SATYABRATA

Inventor： KIRKBIR FIKRET ,  OTANI NATSUKI ,  RAYCHUDHURI SATYABRATA

IPC: C03B19/12 ,  C03B19/14 ,  C03B37/014

CPC classification number: C03B19/1453 ,  C03B19/12 ,  C03B37/01446 ,  C03B2201/31 ,  C03B2203/22

Abstract: A process is suited for producing silica glass bodies having refractive index profiles. The process involves providing a porous body having an initially uniform dopant distribution, heating the porous body in a halogen-containing atmosphere to produce a dopant gradient, and densifying the porous body at an elevated temperature to produce the glass body. The process is more cost-effective than those previously known, and allows for high reproducibility of the refractive index gradients of the bodies produced.

Abstract translation: 一种方法适用于生产具有折射率分布的二氧化硅玻璃体。 该方法包括提供具有最初均匀掺杂剂分布的多孔体，在含卤素的气氛中加热多孔体以产生掺杂剂梯度，并在升高的温度下使多孔体致密化以产生玻璃体。 该方法比先前已知的方法更具成本效益，并且允许产生的物体的折射率梯度具有高的再现性。

公开(公告)号：WO02026646A2

公开(公告)日：2002-04-04

申请号：PCT/US2001/042408

申请日：2001-09-27

IPC: G02B6/00 ,  C03B8/04 ,  C03B19/14 ,  C03B37/014 ,  G02B6/02

CPC classification number: C03B19/1453 ,  C03B37/01446

Abstract: The disclosed invention relates to the use of a specific drying agent in a process for drying glass soot preforms. The drying agent includes at least one halide and at least one reducing agent. Preferably, the reducing agent includes a compound that will react with an oxygen by-product of the reaction of the halide and water, or the reaction of the halide and an impurity in the preform. The method includes disposing the soot preform in a furnace, charging the furnace with the drying agent of halide and reducing agent and supplying heat to the furnace. Suitable drying agents for use in the process disclosed include a mixture of Cl2 and CO; a mixture of Cl2, CO and CO2; and POCl3: the latter being an example where the halide and reducing agent are embodied by a single compound.

Abstract translation: 所公开的发明涉及在干燥玻璃烟炱预制件的方法中使用特定的干燥剂。 干燥剂包括至少一种卤化物和至少一种还原剂。 优选地，还原剂包括将与卤化物和水的反应的氧副产物反应的化合物，或者预型体中卤化物和杂质的反应。 该方法包括将烟灰预制件设置在炉中，用炉内的卤化物和还原剂的干燥剂加热炉子，并向炉内供热。 用于所公开方法的合适的干燥剂包括Cl 2和CO的混合物; Cl2，CO和CO2的混合物; 和POCl 3：后者是卤化物和还原剂由单一化合物体现的实例。