公开(公告)号：EP0500122A1

公开(公告)日：1992-08-26

申请号：EP92102938.5

申请日：1992-02-21

Applicant: SIP SOCIETA ITALIANA PER l'ESERCIZIO DELLE TELECOMUNICAZIONI P.A. ,  SIRTI S.p.A. ,  PIRELLI CAVI S.p.A.

Inventor： Cocito, Giuseppe ,  Modone, Eros

IPC: C03B37/023 ,  C03B5/02 ,  B01J6/00 ,  C03C3/32

CPC classification number: B01D7/00 ,  B01J6/007 ,  B01J2219/0009 ,  B01J2219/00132 ,  C03B5/02 ,  C03B19/106 ,  C03B37/0128 ,  C03B37/01807 ,  C03B2201/82

Abstract: Highly mixed compositions of powdered chemical compounds in predetermined quantities are prepared by causing reactant sublimation or evaporation in suitable crucibles and by conveying the vapours obtained into a cooled vessel, wherein they pass to solid state under powder form. Sublimation or evaporation are facilitated by high temperature and low pressure obtained in the apparatus. Heating of the individual crucibles is obtained by use of a high-frequency furnace and is controlled by ferromagnetic or electromagnetic devices.

Abstract translation: 以预定的量的粉末状化合物的高度混合的组合物是通过使在合适的坩埚中的反应物的升华或蒸发，并通过输送获得到冷却的容器中，worin它们传递到固态下粉末形式。升华或蒸发的蒸气制备通过高温变得容易 和低压的装置获得。 各个坩埚的加热是通过使用一个高频炉的获得，并且由铁磁或电磁装置控制。

公开(公告)号：EP0474919A1

公开(公告)日：1992-03-18

申请号：EP90125399.7

申请日：1990-12-24

Applicant: CORNING INCORPORATED

Inventor： Tick, Paul Arthur

IPC: C03B37/012 ,  C03B19/02

CPC classification number: C03B37/01268 ,  C03B2201/82 ,  C03B2203/34

Abstract: Disclosed is a method of forming a glass preform from core and cladding glasses having low liquidus viscosities and narrow working ranges. A tube of liquid core glass is vertically situated in a vessel of liquid cladding glass. The tube extends to the bottom of the vessel where there is a stopper for preventing leakage of core glass. While both core and cladding glasses are at a temperature just above the liquidus temperature, the vessel is lowered into a coolant bath, thereby causing core glass to flow into the region vacated by the tube. The rate of withdrawing the tube from the vessel is sufficiently slow to provide laminar flow and yet fast enough to permit the resultant liquid core/clad composite to freeze before mixing occurs.

Abstract translation: 公开了一种由具有低液相粘度和窄工作范围的芯和包层玻璃形成玻璃预制棒的方法。 液芯玻璃管垂直地位于液体包层玻璃的容器中。 管延伸到容器的底部，在那里存在用于防止芯玻璃泄漏的塞子。 当核心和包层玻璃处于刚刚高于液相线温度的温度时，将容器降低到冷却剂浴中，从而使芯玻璃流入管中空出的区域。 从容器中取出管的速度足够慢以提供层流，但足够快以允许所得液芯/包覆复合材料在混合之前冷冻。

公开(公告)号：EP0456743A1

公开(公告)日：1991-11-21

申请号：EP90903187.0

申请日：1990-02-02

Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

Inventor： JACOBONI, Charles, Paul ,  BOULARD, Brigitte, Renée, Jacqueline

IPC: C03B8 ,  C03B37 ,  C03C3 ,  C03C17 ,  C04B41

CPC classification number: C03C3/325 ,  C03B37/01807 ,  C03B2201/82 ,  C03C17/02 ,  Y02P40/57 ,  Y10S65/16

Abstract: Procédé de dépôt en phase vapeur d'un verre fluoré sur un substrat, ledit verre fluoré ayant la composition suivante (en mole %; total 100%): 30-50 PbF2, 30-50 GaF3, 0-30 ZnF2, 1-5 MF2 (M = Mn, Cd), 1-5 InF3, 0-10 AlF3, 0-10 d'adjuvant, caractérisé par le fait que l'on met en contact ledit substrat avec les vapeurs provenant d'un bain fondu de fluorures métalliques comprenant un bain d'accueil ayant la composition suivante (en mole %; total 100%): 9-26 YF3, 19-28 BaF2, 35-40 InF3, 18-25 M'F2 (M' = Mn, Cd, Zn), 0-10 d'adjuvant et comprenant en outre, dans les proportions relatives indiquées ci-dessus, les autres ingrédients du verre fluoré à déposer; et composition vitreuse, déposée sur un substrat, ainsi obtenue, utilisable notamment comme guide d'onde dans l'infrarouge.

公开(公告)号：EP0420239A1

公开(公告)日：1991-04-03

申请号：EP90118567.8

申请日：1990-09-27

Applicant: HOYA CORPORATION

Inventor： Miura, Kiyotoaka ,  Yamashita, Toshiharu

IPC: C03B37/012 ,  C03B17/02

CPC classification number: C03B17/025 ,  C03B37/01274 ,  C03B2201/80 ,  C03B2201/82 ,  C03B2205/04 ,  C03C3/325 ,  C03C13/042 ,  Y10S65/16

Abstract: In a method of manufacturing a preform for a nonoxide glass fiber, cladding and core glass materials are placed in a cylinder of an extrusion apparatus such that ground end faces of the respective cladding and core glass materials are in contact with each other and such that the cladding glass material is located adjacent a molding section of the extrusion apparatus. The cladding and core glass materials are heated within inert-gas atmosphere, to their respective temperatures equal to or below their respective sag points and equal to or above their respective crystallization start temperatures. An extrusion punch of the extrusion apparatus is pushed within the atmosphere, to extrude the cladding and core glass materials through a molding nozzle in the molding section while the cladding and core glass materials are in fusible contact with each other, thereby forming the preform of a core and cladding structure. The preform is gradually cooled within a liner connected to the molding section within the atmosphere. Alternatively, an over-cladding glass material may be placed in the cylinder such that the over-cladding material is located adjacent the molding section, and the cladding glass material is located between the over-cladding and core glass materials.

Abstract translation: 在制造非氧化物玻璃纤维的预成型体的方法中，将包层和芯玻璃材料放置在挤出装置的圆筒中，使得各个包层和芯玻璃材料的接地端面彼此接触， 覆层玻璃材料位于挤出设备的模制部分附近。 将包层和芯玻璃材料在惰性气体气氛中加热至各自的温度等于或低于其相应的下垂点，并等于或高于它们各自的结晶起始温度。 挤出装置的挤压冲头在大气中被推入，通过模制部分中的成型喷嘴挤出包层和芯玻璃材料，同时包层和芯玻璃材料彼此熔接接触，从而形成预成型件 芯和包层结构。 预制件在与大气中的模制部分连接的衬里内逐渐冷却。 或者，可以在圆筒中放置上包层玻璃材料，使得上包层材料位于模制部分附近，并且包层玻璃材料位于外包层和芯玻璃材料之间。

公开(公告)号：EP0310309A3

公开(公告)日：1990-11-28

申请号：EP88308864.3

申请日：1988-09-23

Applicant: AT&T Corp.

Inventor： Bautista, Jerry Rodolfo ,  Broer, Matthijs Meno ,  Bruce, Allan James ,  Fleming, James William ,  Walker, Kenneth Lee

IPC: C03B37/014 ,  C03B19/00 ,  C03B37/012 ,  C03C3/32

CPC classification number: C03C3/325 ,  C03B37/01265 ,  C03B37/01277 ,  C03B2201/82 ,  Y10S65/16

Abstract: A new method for fabricating devices which include multicomponent metal halide glasses, e.g., multicomponent metal halide glass optical fibers, is disclosed. In accordance with the inventive method, a multicomponent metal halide glass body, essentially free of crystallites, is produced by cooling essentially every portion of a melt incorporated into the glass body at a quench rate which is necessarily greater than or equal to about 10 Kelvins per second (K/sec). This necessary quench rate is achieved by successively quenching relatively small portions of the melt, e.g., thin layers or droplets of melt material, having relatively small cross-­sectional dimensions.

公开(公告)号：EP0326401A3

公开(公告)日：1990-07-04

申请号：EP89300797.1

申请日：1989-01-27

Applicant: KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA

Inventor： Mimura, Yoshinori ,  Noda, Yukio ,  Norimatsu, Naoki ,  Tokiwa, Hideharu ,  Shinbori, Osamu

IPC: C03B37/012 ,  C03B19/02

CPC classification number: C03B5/225 ,  C03B5/021 ,  C03B37/01268 ,  C03B2201/82

Abstract: A method and apparatus for manufacturing a preform for a fluoride glass fiber. Cooling means (13) and a liquid reservoir (14) are provided in association with a cylindrical vessel (1) open at both ends, and a crucible open (3) at both ends is disposed in the cylindrical vessel. Glass for clad and for core (2,4) are loaded into the cylindrical vessel and the crucible, respectively, with their lower open ends plugged, and are made molten. The clad glass melt is then cooled and when the outer portion of the clad glass melt has solidified with its inner portion still molten; the plugged lower open ends of the cylindrical vessel and the crucible are opened to let the inner portion of the clad glass melt run out into the liquid reservoir, and to introduce the core glass melt into the void from which the clad glass melt has run out. The glass is then cooled and solidified in its entirety, thereby forming a core-clad layer structure.

公开(公告)号：EP0331483A2

公开(公告)日：1989-09-06

申请号：EP89302073.5

申请日：1989-03-02

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Fujiura, Kazuo ,  Ohishi, Yasutake ,  Fujiki, Michiya ,  Kanamori, Terutoshi ,  Takahashi, Shiro

IPC: C03C1/00 ,  C03C13/04 ,  C03C3/32 ,  C03B37/018

CPC classification number: C03B37/01807 ,  C03B19/1415 ,  C03B19/1476 ,  C03B37/01815 ,  C03B37/01861 ,  C03B2201/82 ,  C03B2207/30 ,  C03B2207/81 ,  C03B2207/90 ,  C03C1/00 ,  C03C3/325 ,  C03C13/042 ,  Y10S65/16

Abstract: Provided is a process for preparing a homogenous fluoride glass containing high purity BaF₂ through the CVD process characterized in that the used gaseous mixture comprising: a barium β-diketonate complex serving as a first starting material and represented by the following general formula (1) of:
wherein R is an alkyl group having 1 to 7 carbon atoms, R′ is a substituted alkyl group having fluorine atoms substituting hydrogen atoms and represented by C n F 2n+1 where n is an integer of from 1 to 3; and
a gaseous or vaporizable compound of the matallic element constituting said fluoride glass, the gaseous or vaporizable compound serving as a second starting material; and a fluorine-containing gas serving as fluorinating agent. Further provided is a process for preparing a preform for a fluoride optical fiber which is low in trasmission loss, by depositing the fluoride glass over the interior wall of a cylindrical tube or the wall of rod-like glass substrate through the CVD process followed by collapsing.

Abstract translation: 提供了用于制备均匀的氟化物玻璃通过在DASS特点CVD工艺含有高纯度氟化钡的方法使用的模具的气体混合物，其包括：由下述通式用作第一原料钡的β-二酮络合物和（1）表示的 ： worin R是具有1至7个碳原子的烷基，R min是具有substituiertem烷基氟原子取代氢原子，由C n频率f 2n + 1，其中n是从1到3的整数代表的; 和元件构成matallic的气态或可气化的化合物所述的氟化物玻璃，气态或可汽化的化合物作为第二原料; 和含氟气体作为氟化剂。 进一步提供的是一种用于制备预成型件对于氟化物光纤所有这一切是在trasmission损失低，通过在圆筒形管的内壁或随后通过折叠棒状玻璃基板通过CVD工艺壁沉积的氟化物玻璃 ，

公开(公告)号：EP0196665B1

公开(公告)日：1988-07-13

申请号：EP86104490.7

申请日：1986-04-02

Applicant: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.

Inventor： Parisi, Giuseppe ,  Roba, Giacomo

IPC: C03B37/014

CPC classification number: C03B37/01446 ,  C03B37/014 ,  C03B37/027 ,  C03B2201/82 ,  C03B2201/84 ,  C03B2205/30

公开(公告)号：EP0241037A3

公开(公告)日：1988-06-08

申请号：EP87105285

申请日：1987-04-09

Applicant: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.

Inventor： Cocito, Giuseppe

IPC: C03B37/018

CPC classification number: C03B37/01807 ,  C03B37/018 ,  C03B2201/82 ,  C03C13/04 ,  Y10S65/16

Abstract: The process employs solid-state halides heated at high temperature, under pressure conditions necessary to their vaporization, and obtains their condensation to solid state on the internal surface of a glass tube, which, after collapsing, forms the preform.

公开(公告)号：EP0266889A1

公开(公告)日：1988-05-11

申请号：EP87308639.1

申请日：1987-09-29

Applicant: BRITISH TELECOMMUNICATIONS public limited company

Inventor： France, Paul William

IPC: C03C25/02 ,  C03C13/04

CPC classification number: C03C13/042 ,  C03B37/018 ,  C03B37/01807 ,  C03B2201/82 ,  C03B2201/86 ,  C03B2201/88 ,  C03C13/043 ,  C03C25/226

Abstract: Halide fibres are protected by coatings up to 2µm thick of chalcogenide glasses, eg glasses based on compounds of S, Se or Te with Ge or As. The coatings are deposited on the fibre preform by ion deposition sputtering. Preferably the preform is etched by directing a stream of inert ions at it. Most suitably the etching immediately precedes the coating.

Abstract translation: 卤化物纤维受到厚达2微米厚的硫族化物玻璃的涂层保护，例如基于S，Se或Te与Ge或As的化合物的玻璃。 通过离子沉积溅射将涂层沉积在纤维预制件上。 优选地，通过在其上引导惰性离子流来蚀刻预制件。 最适当地，蚀刻紧接在涂层之前。