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    Optical fiber preform and manufacturing method therefor
    181.
    发明申请
    Optical fiber preform and manufacturing method therefor 有权
    光纤预制棒及其制造方法

    公开(公告)号：US20040221618A1

    公开(公告)日：2004-11-11

    申请号：US10838375

    申请日：2004-05-05

    Applicant: FUJIKURA LTD.

    Inventor： Takakazu Gotoh ,  Naritoshi Yamada

    IPC: C03B037/07

    CPC classification number: C03B37/014 ,  C03B37/01237 ,  C03B2201/04 ,  Y02P40/57

    Abstract: A method for manufacturing an optical fiber preform includes a process A of applying flame polishing to a center glass rod, a process B of determining a ratio ra/rb, which is a ratio of a radius ra of the center glass rod expressed in millimeters with respect to a radius rb of a target optical fiber preform expressed in millimeters, based on a refractive index profile of a target optical fiber preform, and a process C of determining an amount of fine glass particles to be deposited on the center glass rod so that a ratio ra/rb/c falls within a range from 0.002 to 0.01, where nullcnull is a maximum value of hydroxyl group concentration expressed in ppm in the vicinity of a boundary between the center glass rod and an outer layer, which is formed by depositing fine glass particles on the center rod and by being vitrified.

    Abstract translation: 制造光纤预制棒的方法包括对中心玻璃棒施加火焰抛光的方法A，确定比率ra / rb的方法B，其为以毫米表示的中心玻璃棒的半径ra与以毫米为单位的比率 相对于目标光纤预制件的半径rb，以目标光纤预制棒的折射率分布为单位，以毫米为单位表示，以及确定要沉积在中心玻璃棒上的细微玻璃颗粒的量的方法C，使得 比率ra / rb / c落在0.002至0.01的范围内，其中“c”是在形成的中心玻璃棒和外层之间的边界附近以ppm表示的羟基浓度的最大值 通过在中心棒上沉积玻璃微粒并被玻璃化。

    Method and apparatus for making soot
    182.
    发明申请
    Method and apparatus for making soot 审中-公开
    制作烟灰的方法和装置

    公开(公告)号：US20040206127A1

    公开(公告)日：2004-10-21

    申请号：US10840877

    申请日：2004-05-06

    Inventor： Calvin T. Coffey ,  Mark E. L'Antigua ,  Clinton D. Osterhout ,  Amy L. Rovelstad ,  Kashyap H. Shah

    IPC: C03B037/075 ,  C03B037/018

    CPC classification number: C03B19/106 ,  C03B19/1415 ,  C03B19/1423 ,  C03B37/01413 ,  C03B37/0142 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2207/85

    Abstract: The present invention relates to a method of making a soot particle and apparatus for making such soot particle. Preferably the method of making the soot particle is substantially free of the step of combusting a fuel and substantially free of the step of forming a plasma. Preferably, the apparatus is devoid of a heating element associated with both combustion and formation of a plasma. A preferred technique for at least one heating step for forming the doped soot particle is induction heating.

    Abstract translation: 本发明涉及制备烟灰颗粒的方法和制造这种烟灰颗粒的装置。 优选地，制造烟灰颗粒的方法基本上没有燃烧燃料的步骤，并且基本上没有形成等离子体的步骤。 优选地，该装置没有与燃烧和等离子体的形成相关联的加热元件。 用于形成掺杂烟灰颗粒的至少一个加热步骤的优选技术是感应加热。

    Silica-based optical fibers and multi-pass sintering
    183.
    发明申请
    Silica-based optical fibers and multi-pass sintering 审中-公开
    二氧化硅光纤和多遍烧结

    公开(公告)号：US20040071421A1

    公开(公告)日：2004-04-15

    申请号：US10680611

    申请日：2003-10-07

    Inventor： Richard M. Lum ,  David A. Mixon ,  Eric M. Monberg ,  Dennis J. Trevor

    IPC: G02B006/02 ,  G02B006/16

    CPC classification number: C03B19/12 ,  C03B2201/04

    Abstract: A process produces a glass overcladding tube from a silica gel body. The process includes passing the gel body through a hot zone under conditions that cause partial sintering of the gel body and repassing the gel body through the hot zone under conditions that further sinter the gel body into a glass overcladding tube.

    Abstract translation: 一种工艺从硅胶体制造玻璃外包管。 该方法包括使凝胶体通过热区，在引起凝胶体部分烧结的条件下，并且在将凝胶体进一步烧结成玻璃外包管的条件下，通过热区重新分解凝胶体。

    Optical component containing a maximum of 200 wt.-ppm of chlorine
    184.
    发明授权
    Optical component containing a maximum of 200 wt.-ppm of chlorine 有权
    含有最多200重量ppm氯的光学元件

    公开(公告)号：US06289161B1

    公开(公告)日：2001-09-11

    申请号：US09198883

    申请日：1998-11-23

    Applicant: Gerhard Schötz ,  Jan Vydra

    Inventor： Gerhard Schötz ,  Jan Vydra

    IPC: G02B600

    CPC classification number: C03C13/045 ,  C03B37/01446 ,  C03B2201/03 ,  C03B2201/04 ,  C03B2201/07 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/23 ,  C03C2201/11 ,  C03C2201/23 ,  G02B6/02 ,  G02B6/02395 ,  G02B6/443

    Abstract: In a known optical component a cylindrical glass core of synthetic quartz glass contains hydroxyl groups, a maximum 200 wt.-ppm of chlorine, and no dopant in the form of a metal oxide. The glass core is axially enveloped by a glass mantle of doped quartz glass which has a lower refractive index than the glass core. Setting out from this, in order to offer an optical component of quartz glass for broad-band transmission, especially for broad-band spectroscopy, which is characterized by low attenuation over a broad range of wavelengths, it is proposed by the invention that the core glass contain less than 5 wt.-ppm of hydroxyl groups.

    Abstract translation: 在已知的光学组件中，合成石英玻璃的圆柱形玻璃芯包含羟基，最大为200重量ppm的氯，并且不含金属氧化物形式的掺杂剂。 玻璃芯由掺杂石英玻璃的玻璃罩轴向包围，折射率比玻璃芯低。 从此出发，为了提供用于宽带传输的石英玻璃的光学部件，特别是对于在宽波长范围内具有低衰减特征的宽带光谱，本发明提出了核心 玻璃含有小于5重量ppm的羟基。

    Method of making a large MCVD single mode fiber preform by varying internal pressure to control preform straightness
    185.
    发明授权
    Method of making a large MCVD single mode fiber preform by varying internal pressure to control preform straightness 失效
    通过改变内部压力来制造大型MCVD单模纤维预成型件以控制预成型件直线度的方法

    公开(公告)号：US6105396A

    公开(公告)日：2000-08-22

    申请号：US115783

    申请日：1998-07-14

    Applicant: Paul Francis Glodis ,  Charles Francis Gridley ,  Donald Paul Jablonowski ,  David Kalish ,  Kenneth Lee Walker

    Inventor： Paul Francis Glodis ,  Charles Francis Gridley ,  Donald Paul Jablonowski ,  David Kalish ,  Kenneth Lee Walker

    IPC: C03C3/04 ,  C03B37/012 ,  C03B37/018 ,  C03B37/027

    CPC classification number: C03B37/01211 ,  C03B37/01869 ,  C03B37/01884 ,  C03B37/01892 ,  C03B2201/02 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2203/24

    Abstract: A large optical preform 303 is made by a modified chemical vapor deposition (MCVD) process by depositing successive layers of core and cladding materials onto the inside surface of a rotating glass tube 33 having a hydroxyl ion (OH.sup.-) level that is less than 0.5 parts per million (ppm) by weight. The tube is then collapsed inwardly to form a core rod 301 in which the deposited core material 31 has a diameter that is greater than about 5 millimeters and the deposited cladding material 32 has an outside diameter that is less than about 15 millimeters. A machine-vision system 140, 150, 160 monitors and controls the diameter of the glass tube by regulating the pressure within the tube. Moreover, the machine-vision system monitors and controls the straightness of the tube by varying its rotational speed according to angular position. After the core rod 301 is formed, it is plasma etched to remove contaminants, and then overclad with two glass jackets 34, 35 having a hydroxyl ion (OH.sup.-) level that is less than 1.0 ppm by weight to create a large preform 303 from which about 400 kilometers of singlemode optical fiber can be drawn per meter of length.

    Abstract translation: 通过改进的化学气相沉积（MCVD）工艺，通过将核心和包层材料的连续层沉积到具有小于0.5的羟基离子（OH-）水平的旋转玻璃管33的内表面上来制造大型光学预成型件303 百万分之几（ppm）（重量）。 管然后向内折叠以形成芯棒301，其中沉积的芯材料31具有大于约5毫米的直径，并且沉积的包层材料32具有小于约15毫米的外径。 机器视觉系统140,150,160通过调节管内的压力来监视和控制玻璃管的直径。 此外，机器视觉系统通过根据角度位置改变其转速来监测和控制管的平直度。 在形成芯棒301之后，将其等离子体蚀刻以除去污染物，然后用两个小于1.0重量ppm的羟基离子（OH-）水平的两个玻璃外套34,35包覆，以从 每米长度可以绘制约400公里的单模光纤。

    Optical fiber preform
    186.
    发明授权
    Optical fiber preform 失效
    光纤预制棒

    公开(公告)号：US5942296A

    公开(公告)日：1999-08-24

    申请号：US796192

    申请日：1997-02-07

    Applicant: Seung-Hun Oh ,  Gyun-Hae Doh ,  Sun-Woong Kang

    Inventor： Seung-Hun Oh ,  Gyun-Hae Doh ,  Sun-Woong Kang

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/018 ,  C03C13/04 ,  G02B6/036 ,  A47G19/22 ,  B32B7/02 ,  B32B9/00 ,  G02B6/02

    CPC classification number: C03B37/018 ,  C03B37/01211 ,  C03B2201/04 ,  C03B2203/22 ,  C03B2203/24 ,  Y02P40/57 ,  Y10T428/131 ,  Y10T428/1314 ,  Y10T428/1317 ,  Y10T428/24942

    Abstract: Disclosed is an optical fiber possible to prevent it from increasing an optical loss occurring during fabrication of a single mode fiber preform and extraction thereof and enhance an optical transmission efficiency, a method of producing the same comprising the steps of forming a first quartz tube having a first thermal conductivity, said first quartz tube being used as a clad; depositing a core layer and a clad layer inside said first quartz tube to form a preliminary perform by heating of said fist quartz tube; forming a second quartz tube having a second thermal conductivity lower than said first thermal conductivity; and depositing said second quartz tube to said preliminary preform by heating to produce said optical fiber preform.

    Abstract translation: 公开了一种光纤，其可以防止其增加在单模光纤预制件的制造期间发生的光学损耗并提取其并提高光传输效率，其制造方法包括以下步骤：形成第一石英管，其具有 第一导热率，所述第一石英管用作包层; 在所述第一石英管内沉积芯层和覆层以通过加热所述第一石英管形成预备性能; 形成具有低于所述第一热导率的第二热导率的第二石英管; 以及通过加热将所述第二石英管沉积到所述初级预制件以产生所述光纤预制件。

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