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    Multi-cylinder apparatus for making optical fibers, process and product
    91.
    发明授权
    Multi-cylinder apparatus for making optical fibers, process and product 失效
    用于制造光纤，工艺和产品的多缸装置

    公开(公告)号：US5900036A

    公开(公告)日：1999-05-04

    申请号：US708017

    申请日：1996-08-30

    Applicant: Reza Mossadegh ,  Jasbinder Sanghera ,  Ishwar Aggarwal

    Inventor： Reza Mossadegh ,  Jasbinder Sanghera ,  Ishwar Aggarwal

    IPC: C03B37/023 ,  C03B37/027 ,  C03B37/029 ,  C03B37/022

    CPC classification number: C03B37/02754 ,  C03B37/023 ,  C03B37/029 ,  C03B2201/82 ,  C03B2201/86 ,  C03B2203/24 ,  C03B2205/10 ,  C03B2205/14 ,  C03B2205/16

    Abstract: A vertically disposed apparatus used to make core-clad optical fibers inces an inner elongated cylinder removably closed at the top and provided at the bottom with an inner exit port of a smaller diameter than the inner cylinder and an outer cylinder, disposed around the inner cylinder, removably closed at the top and provided at the bottom with an outer exit port of a smaller diameter than the outer cylinder. The inner exit port is of a smaller diameter than the outer exit port and is disposed directly above the outer exit port. The apparatus also includes a heater for heating the inner and outer cylinders and acces to the inner and the outer cylinders for individually pressurizing inner and outer cylinders. The process by which the core-clad optical fibers are made includes the steps of placing a solid glass core rod into the inner cylinder of the apparatus described above, placing a solid glass cladding tube into the outer cylinder, melting the core rod and the cladding tube, quickly cooling the molten core rod and cladding tube to the drawing temperature, individually pressurizing the molten core rod and cladding tube, and drawing the core-clad optical fiber through the exit ports.

    Abstract translation: 用于制造包芯光纤的垂直设置的装置包括：内部细长圆筒，其在顶部可拆卸地封闭并且设置在底部，具有比内筒更小直径的内出口和设置在内筒周围的外筒 在顶部可拆卸地封闭，并且在底部设置有比外筒小直径的外出口。 内出口的直径比外出口小，直接位于外出口的正上方。 该装置还包括用于加热内筒和外筒的加热器，并且与内筒和外筒相接触，用于单独地加压内筒和外筒。 制造芯包覆光纤的过程包括以下步骤：将实心玻璃芯棒放置在上述设备的内筒中，将固体玻璃包层管放置在外筒中，熔化芯棒和包层 将熔芯和包层管快速冷却至拉伸温度，分别对熔芯和包层管进行加压，并通过出口拉出芯包覆光纤。

    Method for making optical fiber preforms
    96.
    发明授权
    Method for making optical fiber preforms 失效
    制造光纤预制棒的方法

    公开(公告)号：US5160521A

    公开(公告)日：1992-11-03

    申请号：US718705

    申请日：1991-06-21

    Applicant: Danh C. Tran

    Inventor： Danh C. Tran

    IPC: C03B37/012 ,  C03C13/04

    CPC classification number: C03C13/043 ,  C03B37/01268 ,  C03B37/01271 ,  C03C13/042 ,  C03B2201/82 ,  C03B2201/86 ,  Y10S65/15 ,  Y10S65/16

    Abstract: A method for fabricating defect-free optical fiber preforms without light scattering defects such as core-clad interface bubbles, core-clad crystalline inclusions and core glass crystals involves first forming a cladding glass shell preferably by rotational casting, then separately melting core glass inside a cylindrical crucible and quenching using metallic quenching blocks to prevent crystal formation in the core glass, next heating the core containing crucible to the core glass softening point and also heating the cladding tube containing mold to the glass transition temperature of the cladding glass, then placing the cladding tube containing mold inside the core glass crucible and pushing it downwardly with high pressure so that the softened core glass is forced into the cladding glass tube, and finally the preform is annealed to remove thermal stress. Subsequently, the preform is drawn into optical fibers using conventional technology.

    Abstract translation: 首先，通过旋转铸造来首先形成包层玻璃壳，然后将芯玻璃内部分别熔融，然后将核心玻璃分别熔融 使用金属淬火块进行淬火，以防止芯玻璃中的晶体形成，接着将含芯坩埚的芯体加热到芯玻璃软化点，并将含有模具的包层管加热到包层玻璃的玻璃化转变温度，然后将 在芯玻璃坩埚内装有包覆模具，并以高压将其向下推压，使得软化的芯玻璃被迫进入包层玻璃管，最后对预制件进行退火以去除热应力。 随后，使用常规技术将预成型件拉入光纤。

    Method of making fluoride glass using barium .beta.-diketones
    97.
    发明授权
    Method of making fluoride glass using barium .beta.-diketones 失效
    使用钡β-二酮制造氟化玻璃的方法

    公开(公告)号：US5145508A

    公开(公告)日：1992-09-08

    申请号：US684070

    申请日：1991-03-11

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

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

    IPC: C03B19/14 ,  C03B37/018 ,  C03C1/00 ,  C03C3/32 ,  C03C13/04

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

    Abstract: A method for preparing a homogenous fluoride glass containing high purity BaF.sub.2 through the CVD process using a gaseous mixture containing a barium .beta.-diketonate complex service as a first starting material and represented by the following general formula (1) of: ##STR1## where (i) R and R' are each --C(CH.sub.3).sub.3 ; or (ii) R is CH.sub.2 CH.sub.2 CH.sub.3 and R' is --C(CH.sub.3).sub.3 ; or (iii) R and R' are each CF.sub.3 ;a gaseous or vaporizable compound of the metallic 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 perform for a fluoride optical fiber which is low in transmission 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 following by collapsing.

    Abstract translation: 一种通过CVD法制备含有高纯度BaF2的均匀氟化物玻璃的方法，该方法使用含有β-二酮化合物复合物的气体混合物作为第一起始原料并由以下通式（1）表示： ）其中（i）R和R'各自为-C（CH 3）3; 或（ii）R是CH 2 CH 2 CH 3，R'是-C（CH 3）3; 或（iii）R和R'各自为CF 3; 构成所述氟化物玻璃的金属元素的气态或可汽化化合物，作为第二原料的气态或可汽化化合物; 和作为氟化剂的含氟气体。 另外提供了一种通过CVD法将氟化物玻璃沉积在圆柱形管的内壁或棒状玻璃基板的壁上，通过沉积氟化物玻璃来制备传输损耗低的氟化物光纤的方法 。

    Casting core/clad glass preforms method and apparatus
    98.
    发明授权
    Casting core/clad glass preforms method and apparatus 失效
    铸造芯/玻璃玻璃预制件方法和装置

    公开(公告)号：US5106400A

    公开(公告)日：1992-04-21

    申请号：US580161

    申请日：1990-09-10

    Applicant: Paul A. Tick

    Inventor： Paul A. Tick

    IPC: C03B37/016 ,  C03B37/012 ,  G02B6/00

    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.

    Fluoride glass fibers with reduced defects
    100.
    发明授权
    Fluoride glass fibers with reduced defects 失效
    具有减少缺陷的氟化物玻璃纤维

    公开(公告)号：US5055120A

    公开(公告)日：1991-10-08

    申请号：US498453

    申请日：1990-03-20

    Applicant: Danh C. Tran ,  Reza Mossadegh ,  Nicholas Garito ,  Mohamad Farid

    Inventor： Danh C. Tran ,  Reza Mossadegh ,  Nicholas Garito ,  Mohamad Farid

    IPC: C03B37/012 ,  C03B37/027 ,  C03B37/029

    CPC classification number: C03B37/01268 ,  C03B37/01271 ,  C03B37/027 ,  C03B37/029 ,  C03B2201/82 ,  C03B2205/16 ,  Y10S65/16 ,  Y10S65/90

    Abstract: Improved fluoride glass optical fibers are produced by a process introducing several improvements in the production of fluoride glass preforms and the drawing of fibers therefrom. Reduced bubble formation and crystallization are obtained by vertically spinning a fluoride glass melt within a glass cladding tube at a high rotational speed, or alternatively, pouring a flouride glass core melt into a cladding tube while slowly raising the mold from an inclined position to a vertical position, or alternatively, introducing a core tube inside a cladding tube. The production of fibers is enhanced if at least one production phase, i.e., preform formation or fiber drawing, is conducted in an atmosphere containing reactive gases that scavenge molecules that could otherwise react with, hydrolyze and oxidize the fluoride glass. The disclosure also describes several devices uniquely useful in the process of the present invention. In another aspect of the present invention, fluoride glass fibers may be clad with a fluoropolymer which is coated with a polymerizable resin.

    Abstract translation: 改进的氟化物玻璃光纤通过在氟化物玻璃预成型件的生产中的几个改进和从其中拉出纤维的方法来生产。 通过在玻璃包覆管内以高转速垂直旋转氟化物玻璃熔体，或者将玻璃芯熔融物倾倒到包层管中，同时将模具从倾斜位置缓慢升高至垂直方向 位置，或者在芯管内部引入芯管。 如果在含有反应气体的气氛中进行至少一个生产阶段，即预型体形成或纤维拉伸，则可以增加纤维的生产，所述反应性气体清除可能会与氟化物玻璃反应，水解和氧化的分子。 本公开还描述了在本发明的方法中独特有用的几种装置。 在本发明的另一方面，氟化物玻璃纤维可以用涂覆有可聚合树脂的含氟聚合物包覆。

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