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    Apparatus and method for drawing glass fibers
    51.
    发明授权
    Apparatus and method for drawing glass fibers 失效
    玻璃纤维拉制装置及方法

    公开(公告)号：US06295844B1

    公开(公告)日：2001-10-02

    申请号：US07415923

    申请日：1989-09-11

    Applicant: Danh C. Tran ,  Pablo C. Pureza

    Inventor： Danh C. Tran ,  Pablo C. Pureza

    IPC: C03B37025

    CPC classification number: C03B37/029 ,  C03B2201/82 ,  C03B2205/64 ,  C03B2205/80 ,  C03B2205/90

    Abstract: An apparatus and method for drawing low loss fluoride glass fibers from a preform. A stream of reactive gas is passed around the preform and fiber so as to prevent moisture and oxygen contamination of the fiber while the fiber is being drawn. The apparatus includes an insulating vessel which surrounds a heating chamber in which the fiber is drawn, and a very narrow heating zone within the chamber for preventing crystallization of the drawn fiber.

    Abstract translation: 一种用于从预制件中拉制低损耗氟化玻璃纤维的设备和方法。 反应气体流围绕预成型件和纤维通过，以防止在纤维被拉伸时纤维的水分和氧气污染。 该设备包括一个绝缘容器，该绝缘容器围绕着一个加热室，其中纤维被拉出，并且在室内的非常窄的加热区域用于防止拉伸的纤维的结晶。

    Method of centrifuging a halide glass and forming an optical fiber preform
    52.
    发明授权
    Method of centrifuging a halide glass and forming an optical fiber preform 失效
    离心卤化物玻璃并形成光纤预制棒的方法

    公开(公告)号：US5779756A

    公开(公告)日：1998-07-14

    申请号：US878626

    申请日：1997-06-19

    Applicant: Frederic Chiquet ,  Marylise Le Crom ,  Jean-Jacques Girard

    Inventor： Frederic Chiquet ,  Marylise Le Crom ,  Jean-Jacques Girard

    IPC: G02B6/00 ,  C03B19/04 ,  C03B37/012 ,  C03B37/014 ,  C03B37/027

    CPC classification number: C03B37/01271 ,  C03B37/01268 ,  C03B2201/82

    Abstract: A method of fabricating a fluoride glass optical fiber preform which has a fluoride glass core surrounded by a fluoride glass optical cladding includes the following steps: introducing the cladding glass in the molten state into a bottom part of a mold having a cylindrical inside cross-section, introducing the core glass in the molten state into a top part of the mold above the cladding glass, and inwardly solidifying the core glass and the cladding glass from the interface between the glasses and the mold. The kinetics of solidification of the core glass are such that complete solidification of the cladding glass occurs before complete solidification of the core glass. The method further includes the following operations: centrifuging the content of the mold simultaneously with the solidification, wherein because of the reduction in the volume of the glasses during the solidification, a central portion empty of glass and of substantially cylindrical cross-section is formed around an axis of the mold by the completely solidified cladding glass, which thereby forms the cladding of the preform, wherein the core glass is not completely solidified at the end of the centrifuging, after the centrifuging operation, causing the unsolidified core glass to flow into the central portion,so forming the core of the preform, and removing the solidified preform from the mold.

    Abstract translation: 一种氟化玻璃光纤预制棒的制造方法，其特征在于，具有由氟化物玻璃光学包层所包围的氟化物玻璃核心的方法，包括以下步骤：将熔融状态的包层玻璃引入具有圆筒形内侧截面的模具的底部 将熔融状态的芯玻璃引入包层玻璃上方的模具的上部，并且从玻璃和模具之间的界面向内固化芯玻璃和包层玻璃。 核心玻璃的凝固动力学使得包层玻璃的完全凝固发生在芯玻璃的完全凝固之前。 该方法还包括以下操作：在凝固的同时离心模具的内容物，其中由于在凝固期间玻璃体积的减小，在玻璃周围形成大致圆柱形横截面的中心部分 通过完全固化的包覆玻璃的模具的轴线，由此形成预成型件的包层，其中在离心分离操作之后，芯玻璃在离心结束时不完全固化，导致未固化的芯玻璃流入 中心部分，从而形成预成型件的芯部，并从模具中去除固化的预制件。

    Double-clad upconversion fiber laser
    55.
    发明授权
    Double-clad upconversion fiber laser 失效
    双层上转换光纤激光器

    公开(公告)号：US5530709A

    公开(公告)日：1996-06-25

    申请号：US301544

    申请日：1994-09-06

    Applicant: Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    Inventor： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    IPC: G02B6/036 ,  G02B6/42 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/10 ,  H01S5/40 ,  H01S3/30

    CPC classification number: G02B6/03638 ,  G02B6/03605 ,  G02B6/03633 ,  H01S3/06708 ,  H01S3/094003 ,  C03B2201/82 ,  C03B2203/12 ,  C03B2203/32 ,  G02B6/4204 ,  H01S3/06729 ,  H01S3/0675 ,  H01S3/094069 ,  H01S3/094092 ,  H01S3/0941 ,  H01S5/1064 ,  H01S5/4025

    Abstract: An upconversion fiber laser with a double-clad fiber is pumped with a laser-diode-based laser pump source, the inner cladding of the fiber forming a low transmission loss waveguide for the pump light. The central core of the fiber is doped with an active lasing ionic species capable of undergoing upconversion excitation, such as certain rare earth ionic species. The use of a double-clad fiber permits the use of high power, high brightness laser diodes, including those with broad emitting apertures, as well as high power diode laser pumped fiber lasers, as the pump source, thereby achieving higher pump intensities within the upconversion laser fiber and improved upconversion efficiency. Pump brightness can be further increased with multiple pump schemes which use multiple pump wavelengths in different absorption bands, multiple pump wavelengths within the same absorption band, pump light from pairs of cross-polarized sources, and pumping from both ends of the fiber.

    Abstract translation: 具有双包层光纤的上转换光纤激光器用基于激光二极管的激光泵浦泵浦，纤维的内包层形成用于泵浦光的低传输损耗波导。 纤维的中心芯掺杂有能够经历上转换激发的活性激光离子物质，例如某些稀土离子物质。 使用双包层光纤允许使用大功率，高亮度激光二极管，包括具有广泛发射孔的激光二极管，以及作为泵浦源的大功率二极管激光泵浦光纤激光器，从而实现更高的泵浦强度 上转换激光光纤，提高转换效率。 泵浦亮度可以通过多种泵方案进一步提高，这些泵方案在不同吸收带内使用多个泵浦波长，在同一吸收带内的多个泵浦波长，来自成对的交叉极化源的泵浦光以及来自光纤两端的泵浦。

    Method of forming fluoride glass fiber preform
    57.
    发明授权
    Method of forming fluoride glass fiber preform 失效
    形成氟化玻璃纤维预制棒的方法

    公开(公告)号：US5308371A

    公开(公告)日：1994-05-03

    申请号：US047522

    申请日：1993-04-19

    Applicant: Hiromi Kawamoto ,  Yoshinori Kubota ,  Natsuya Nishimura ,  Akira Sakanoue

    Inventor： Hiromi Kawamoto ,  Yoshinori Kubota ,  Natsuya Nishimura ,  Akira Sakanoue

    IPC: C03B17/00 ,  C03B37/012 ,  C03B37/014 ,  C03C3/32 ,  G02B6/00 ,  C03B37/023

    CPC classification number: C03B37/01274 ,  C03B37/01268 ,  C03B2201/82

    Abstract: A method of forming a fiber glass preform includes the steps of: (a) pouring a cladding glass into a mold; (b) pouring a core glass on a flat horizontal upper surface of the cladding glass so as to form a united glass body having the core glass and the cladding glass under a condition that viscosity of the cladding glass and viscosity of the core glass are adjusted to certain predetermined values respectively so that the core glass is separated from and placed on the cladding glass; (c) cooling the united glass body to solidify the same so that the cladding glass is deformed by contraction thereof so as to produce a depression at a top middle portion thereof and that the core glass is deformed so as to form a projected portion thereof to fill the depression therewith; (d) separating the united glass body into an upper portion and a lower portion comprising the projected portion of the core glass; and (e) extruding the lower portion of the united glass body so as to form the fiber glass preform.

    Abstract translation: 形成玻璃纤维预制棒的方法包括以下步骤：（a）将包层玻璃倒入模具中; （b）在包层玻璃的平坦的水平上表面上浇注芯玻璃，以在包层玻璃的粘度和芯玻璃的粘度被调节的条件下形成具有芯玻璃和包层玻璃的联合玻璃体 分别达到某些预定值，使得芯玻璃与包层玻璃分离并放置在包层玻璃上; （c）冷却联合玻璃体以使其固化，使得包层玻璃通过收缩而变形，从而在其顶部中间部分产生凹陷，并且芯玻璃变形以形成其突出部分 填充凹陷; （d）将玻璃体分离成包括芯玻璃的突出部分的上部和下部; 和（e）挤出组合玻璃体的下部以便形成玻璃纤维预制件。

    Preparation of fluoride glass optical preforms and fibers
    59.
    发明授权
    Preparation of fluoride glass optical preforms and fibers 失效
    氟化玻璃光学预成型件和纤维的制备

    公开(公告)号：US5026409A

    公开(公告)日：1991-06-25

    申请号：US292792

    申请日：1989-01-03

    Applicant: M. Robinson ,  Antonio C. Pastor ,  Ricardo C. Pastor

    Inventor： M. Robinson ,  Antonio C. Pastor ,  Ricardo C. Pastor

    IPC: C03B37/012

    CPC classification number: C03B37/01228 ,  C03B37/01211 ,  C03B37/01248 ,  C03B37/01268 ,  C03B37/02754 ,  C03B2201/82 ,  Y10S65/16 ,  Y10S65/90

    Abstract: A preform for preparation of optical fibers is prepared by inserting a rod of a higher index of refraction fluoride glass into the bore of a hollow cylinder of a lower index of refraction fluoride glass fiber. This preform precursor is processed to collapse the hollow cylinder inwardly to form a composite preform having a high-refractive index core and a low-refractive index casing. The preparing of the glasses and processing to a preform are accomplished in a reactive environment that reacts and removes oxygen and hydrogen containing species from the glass, the reactive environment being, for example, Cl.sub.2, CCl.sub.4, SF.sub.6, BF.sub.3, CF.sub.4, or the decomposition products of a liquefied solid fluorocarbon. The preform is then drawn to an optical fiber.

    Abstract translation: 通过将较高折射率的氟化玻璃的棒插入到较低折射率的氟化物玻璃纤维的中空圆筒的孔中来制备用于制备光纤的预制棒。 处理该预成型体前体以向内折叠中空圆筒，以形成具有高折射率芯和低折射率套管的复合预制件。 玻璃的制备和预处理的处理在反应环境中完成，其反应并从玻璃中除去含氧和氢的物质，反应环境为例如Cl 2，CCl 4，SF 6，BF 3，CF 4或分解 液化固体碳氟化合物的产品。 然后将预制件拉制成光纤。

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