公开(公告)号：US06446468B1

公开(公告)日：2002-09-10

申请号：US09630066

申请日：2000-08-01

Applicant: James William Fleming, Jr. ,  Sandeep Kakar ,  Richard M. Lum ,  Eric M. Monberg

Inventor： James William Fleming, Jr. ,  Sandeep Kakar ,  Richard M. Lum ,  Eric M. Monberg

IPC: C03B37027

CPC classification number: C03B37/02754 ,  C03B37/01211 ,  C03B37/01225 ,  C03B37/0126 ,  C03B37/01446

Abstract: An improved technique for assembling and drawing fiber from preforms is provided. In one embodiment, the technique involves providing a core rod assembly comprising a core rod and a bushing attached at an end of the assembly. The core rod assembly is inserted into an unsintered overcladding tube, and secured to the tube such that the core rod assembly is suspended within. The overcladding tube and the core rod assembly are heated to sinter the overcladding tube and thereby form a preform assembly. During the heating step, the bushing comes into contact with the interior of the overcladding tube, and, because the bushing has a larger diameter than the core rod, an annular gap is maintained between the core rod assembly and the interior of the overcladding tube. It is then possible to attach a draw handle to the preform assembly, place the preform assembly into a draw tower, and draw fiber from the preform assembly by an overclad during draw technique.

Abstract translation: 提供了一种用于从预成型件组装和拉制纤维的改进技术。 在一个实施例中，该技术涉及提供一种芯棒组件，其包括芯棒和连接在组件端部的衬套。 芯棒组件插入未烧结的外包管中，并固定到管上，使得芯棒组件悬挂在其中。 将外包管和芯棒组件加热以烧结外包管，从而形成预制组件。 在加热步骤期间，衬套与外包管的内部接触，并且由于衬套具有比芯棒更大的直径，所以在芯棒组件和外包管的内部之间保持环形间隙。 然后可以将拉手拉到预成型件组件上，将预成型件组件放入拉制塔中，并且在拉伸技术期间通过外包装从预成型件组件中拉出纤维。

公开(公告)号：US4033667A

公开(公告)日：1977-07-05

申请号：US612626

申请日：1975-09-12

Applicant: James William Fleming, Jr.

Inventor： James William Fleming, Jr.

IPC: C03B37/018 ,  C03C13/04 ,  G02B6/028 ,  G02B5/14

CPC classification number: G02B6/0288 ,  C03B37/01807 ,  C03C13/045 ,  C03C13/046 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2203/26 ,  G02B6/02285 ,  G02B6/03627

Abstract: A multimode optical fiber waveguide with graded refractive index for lessening modal dispersion depends upon simultaneous grading of both P.sub.2 O.sub.5 and B.sub.2 O.sub.3 within an otherwise generally unmodified silica glass. P.sub.2 O.sub.5 is at a maximum in the axial core region, while B.sub.2 O.sub.3 is generally the only modifier in the peripheral core region. The defined profile, which depends critically upon P.sub.2 O.sub.5 content in the axial composition and somewhat less critically upon the B.sub.2 O.sub.3 peripheral composition content, is near optimum from the standpoint of mode dispersion and remains so for the entire useful range of carrier wavelength (generally defined as from 0.5 to 1.1 .mu.m). Numerical aperture for fibers of the invention are typically at a level of 0.3.

Abstract translation: 具有渐变折射率以减小模态色散的多模光纤波导取决于在通常未改性的二氧化硅玻璃内同时分选P2O5和B2O3。 P2O5在轴芯区域处于最大值，而B 2 O 3通常是外围核心区域中唯一的修饰剂。 限定的轮廓，其主要取决于轴向组成中的P2O5含量和稍微不太关键的B2O3周边组成含量，从模式分散的观点来看是接近最佳的，并且对于载体波长的整个有用范围（通常定义为 0.5〜1.1μm）。 本发明的纤维的数值孔径通常为0.3。

公开(公告)号：US6041623A

公开(公告)日：2000-03-28

申请号：US141440

申请日：1998-08-27

Applicant: James William Fleming, Jr.

Inventor： James William Fleming, Jr.

IPC: C03B8/02 ,  C03B29/02 ,  C03B37/012 ,  C03B37/014 ,  C03B37/016 ,  C03C15/02 ,  C03C23/00 ,  C03B29/00

CPC classification number: C03C23/006 ,  C03B29/02 ,  C03B37/01237 ,  C03B37/0148 ,  C03B37/016 ,  C03C15/02

Abstract: The smoothness of refractory dielectric bodies, particularly silica sol-gel bodies, is substantially improved by a relatively straightforward treatment. In particular, the surface of the body is treated with a plasma fireball, such as induced by a plasma torch. The treatment is able to reduce the roughness, as measured by RA, in overcladding tubes formed by a sol-gel process by at least a factor of 2, typically at least a factor of 5. It is also possible to improve the smoothness of silica tubes that are drawn from a billet. Typically, the process reduces the roughness of silica bodies to an RA of about 1 microinch or less.

Abstract translation: 耐火介质体，特别是硅溶胶凝胶体的平滑度通过相对简单的处理得到显着提高。 特别地，用诸如由等离子体焰炬诱导的等离子体火球来处理身体的表面。 该处理能够通过RA测量在由溶胶 - 凝胶法形成的外包管至少2倍，通常至少为5倍的范围内减小粗糙度。还可以提高二氧化硅的平滑度 从钢坯中抽出的管。 通常，该方法将二氧化硅体的粗糙度降低至约1微英寸或更小的RA。

公开(公告)号：US5698124A

公开(公告)日：1997-12-16

申请号：US551240

申请日：1995-10-31

Applicant: Frank Vincent DiMarcello ,  James William Fleming, Jr. ,  Arthur Clifford Hart, Jr. ,  Richard Garner Huff ,  Karen S. Kranz

Inventor： Frank Vincent DiMarcello ,  James William Fleming, Jr. ,  Arthur Clifford Hart, Jr. ,  Richard Garner Huff ,  Karen S. Kranz

IPC: C03B37/027 ,  C03B37/029 ,  F27B1/09 ,  F27B9/36 ,  F27D11/06 ,  G02B6/00 ,  H05B6/02 ,  H05B6/14 ,  H05B6/22 ,  H05B6/10 ,  F27D1/00

CPC classification number: H05B6/22 ,  C03B37/029 ,  C03B2205/64 ,  C03B2205/70

Abstract: A fiber drawing apparatus is provided with an improved fiber draw furnace wherein an inner zirconia tube is surrounded by a radially-spaced annular insulating region of magnesia within a silica beaker. While the magnesia has a melting point approximately the same as zirconia, the electrical conductivity of magnesia is substantially lower, enabling it to withstand higher RF power. Moreover magnesia is more soluble than zirconia in silica, reducing the likelihood of particulate contamination of the fiber.

Abstract translation: 纤维拉伸装置设置有改进的纤维拉制炉，其中内部氧化锆管被二氧化硅烧杯内的氧化镁的径向隔开的环形绝缘区域包围。 虽然氧化镁具有与氧化锆大致相同的熔点，但是氧化镁的电导率显着较低，使得其能够承受更高的RF功率。 此外，氧化镁在二氧化硅中比氧化锆更易溶，降低了纤维颗粒污染的可能性。

公开(公告)号：US3989350A

公开(公告)日：1976-11-02

申请号：US612646

申请日：1975-09-12

Applicant: Leonard George Cohen ,  James William Fleming, Jr. ,  William George French

Inventor： Leonard George Cohen ,  James William Fleming, Jr. ,  William George French

IPC: C03B37/018 ,  C03C13/04 ,  G02B6/028 ,  G02B5/14

CPC classification number: G02B6/0288 ,  C03B37/01807 ,  C03C13/045 ,  C03C13/046 ,  C03B2201/10 ,  C03B2203/26 ,  G02B6/02285 ,  G02B6/03627

Abstract: A multimode optical fiber waveguide with graded refractive index for lessening modal dispersion with the gradient produced at least in part by radially decreasing boron oxide content outwardly from the core center within a high silica glass core minimizes modal dispersion by use of a non-parabolic grading function. The optimum gradient for a simple binary borosilicate system for a wavelength of from approximately 0.5 to 1.1 micrometers corresponds with .alpha. = 1.77 .+-. 10 percent in the equation n = n.sub.1 [1-2.DELTA.(r/a).sup..alpha.].sup.1/2, in which n.sub.1 is the axial core index r is the distance from the fiber axis, a is the core radius, .DELTA. is the relative index difference between core center and cladding and .alpha. is a power law exponent which characterizes the profile.

Abstract translation: 具有渐变折射率的多模光纤波导，用于减少模态色散，至少部分地通过在高二氧化硅玻璃核心内从核心中心径向减少氧化硼含量产生的梯度，通过使用非抛物线分级函数来最小化模态色散 。 对于波长为约0.5至1.1微米的简单二元硼硅酸盐系统的最佳梯度对应于等式中的α= 1.77 +/- 10％n = n1 [1-2 DELTA（r / a）1） / 2，其中n1是轴芯指数r是距纤维轴的距离，a是芯半径，DELTA是芯中心和包层之间的相对折射率差，α是表征轮廓的幂律指数。

公开(公告)号：US07421174B2

公开(公告)日：2008-09-02

申请号：US11511174

申请日：2006-08-28

Applicant: James William Fleming, Jr. ,  George Edward Oulundsen, III

Inventor： James William Fleming, Jr. ,  George Edward Oulundsen, III

IPC: G02B6/028

CPC classification number: G02B6/03627 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2203/26 ,  C03C13/046 ,  G02B6/0288

Abstract: A silicate optical fiber comprises a graded index silicate core co-doped with aluminum oxide, phosphorus oxide, germanium oxide and fluorine in unique compositions that we have discovered allow multimode, multi-wavelength operation without significant intermodal dispersion. Illustratively, the core comprises a multiplicity of compositions whose refractive indices are graded from a maximum at or near the center of the core to a minimum at the interface with the cladding. Each core composition resides within a sub-volume of a 5 dimensional phase space in which an optimum core profile shape is essentially constant over the wavelength range of operation of the fiber. For operation in the wavelength range of about 0.78 μm to 1.55 μm, each composition preferably comprises no more than approximately 6 mole % Al2O3, 9 mole % P2O5, 6 mole % GeO2, 6 mole % F, and 90-100 mole % SiO2.

Abstract translation: 硅酸盐光纤包括与氧化铝，氧化磷，氧化锗和氟共掺杂的分级指数硅酸盐芯，其独特的组成，我们发现允许多模多波长操作，而没有显着的联合分散。 说明性地，芯包括多个组合物，其折射率从芯的中心处或附近的最大值到与包层的界面处最小。 每个核心组合物位于5维相位空间的子体积中，其中最佳核心轮廓形状在光纤的操作的波长范围上基本上是恒定的。 为了在约0.78μm至1.55μm的波长范围内操作，每个组合物优选包含不超过约6摩尔％的Al 2 O 3 N 3，9摩尔％P

公开(公告)号：US06305195B1

公开(公告)日：2001-10-23

申请号：US09321076

申请日：1999-05-27

Applicant: James William Fleming, Jr. ,  George John Zydzik

Inventor： James William Fleming, Jr. ,  George John Zydzik

IPC: C03B37018

CPC classification number: C03B23/207 ,  C03B37/01205 ,  C03B37/02736 ,  C03B2205/30

Abstract: An improved process for fabricating a refractory dielectric article, in particular silica optical fiber, is provided. The fabrication process involves joining of two elongated bodies—typically silica preforms—end-to-end by use of an isothermal plasma torch technique. A long preform made in this manner allows drawing of optical fiber with less down-time and waste than current processes. The plasma torch technique also produces low perturbations within the resultant preform, thereby increasing the amount of usable fiber.

Abstract translation: 提供了制造难熔电介质制品，特别是二氧化硅光纤的改进方法。 制造过程涉及通过使用等温等离子体焰炬技术来连接两个细长体 - 通常是二氧化硅预制件 - 端对端。 以这种方式制成的长预制件允许拉伸光纤比当前工艺更少的停机时间和浪费。 等离子体焰炬技术还在所得预制件内产生低扰动，从而增加可用纤维的量。

公开(公告)号：US5861047A

公开(公告)日：1999-01-19

申请号：US939142

申请日：1997-09-29

Applicant: James William Fleming, Jr. ,  Robert M. Pafchek

Inventor： James William Fleming, Jr. ,  Robert M. Pafchek

IPC: C03B29/02 ,  C03B37/012 ,  C03B37/014 ,  C03C23/00 ,  C03C25/62 ,  C03B37/018

CPC classification number: C03C25/6293 ,  C03B29/02 ,  C03B37/01237 ,  C03B37/0148 ,  C03B37/01493 ,  C03C23/006 ,  C03B2201/03 ,  C03B2201/04

Abstract: A refractory dielectric body is heated with a plasma torch at conditions which do not result in substantial removal of a surface portion of the body, yet which are sufficient to reduce both surface and bulk impurities. Typically, the body is solid, e.g., a rod as opposed to a tube, and is treated with the plasma in the absence of simultaneous deposition of material onto the body. Advantageously, an isothermal plasma torch is utilized, and the torch advantageously produces an oxygen or oxygen-containing plasma. The invention is useful for reducing chlorine impurities by at least about 30% to a depth of at least about 10 .mu.m, with accompanying reduction of hydroxyl impurities. The invention thus provides a useful method for reducing the concentration of impurities that contribute to imperfections during the process of drawing fiber from an optical fiber preform, without requiring substantial removal of the surface of the preform.

Abstract translation: 耐火电介质体在等离子体焰炬的条件下被加热，其条件不会导致本体的表面部分的实质去除，而这足以减少表面和体积杂质。 通常，身体是固体的，例如与管相反的杆，并且在没有材料同时沉积到身体上的情况下用等离子体处理。 有利地，使用等温等离子体焰炬，并且炬有利地产生含氧或含氧的等离子体。 本发明可用于将氯杂质减少至少约30％至至少约10μm的深度，伴随着羟基杂质的减少。 因此，本发明提供了一种有用的方法，用于在从纤维预制棒中拉伸纤维的过程中减少有助于缺陷的杂质的浓度，而不需要基本上去除预型体的表面。

公开(公告)号：US06553790B1

公开(公告)日：2003-04-29

申请号：US09567536

申请日：2000-05-09

Applicant: James William Fleming, Jr. ,  George John Zydzik

Inventor： James William Fleming, Jr. ,  George John Zydzik

IPC: C03B3707

CPC classification number: C03B37/01254 ,  C03B37/01211 ,  C03B37/0124 ,  C03B2203/18

Abstract: A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respectively, increases or decreases in the core diameter at the softened regions. By providing selective core diameter increases and/or decreases across the entire length of the core rod, a desired core diameter profile is attained. It is possible to attain a substantially uniform core diameter, or a varying core diameter profile that provides particular properties, such as systematically varying dispersion. In addition, due to the ability to increase core diameter and core rod diameter in a controlled manner, it is possible to make larger core rods, and in turn larger fiber preforms, than presently possible.

Abstract translation: 二氧化硅基芯棒沿其纵向轴线被热源横穿，以提供加热的软化区域。 在横移过程中，沿着杆的纵向轴线提供压缩或拉伸运动，这些运动分别在软化区域处引起芯直径的增加或减小。 通过在芯棒的整个长度上提供选择的芯直径增加和/或减小，获得期望的芯直径分布。 可以获得基本均匀的芯直径或提供特定性能的变化的芯直径轮廓，例如系统变化的分散体。 另外，由于能够以受控的方式增加芯直径和芯棒直径，所以可以制造比目前可能的更大的芯棒，以及大的纤维预制件。

公开(公告)号：US5692087A

公开(公告)日：1997-11-25

申请号：US403044

申请日：1995-03-13

Applicant: Fred Paul Partus ,  Gordon Albert Thomas ,  Robert Michael Atkins ,  James William Fleming, Jr.

Inventor： Fred Paul Partus ,  Gordon Albert Thomas ,  Robert Michael Atkins ,  James William Fleming, Jr.

IPC: G02B6/00 ,  C03B37/018 ,  G02B6/16

CPC classification number: C03B37/01861 ,  C03B37/01815 ,  C03B37/01823 ,  C03B37/01869

Abstract: An optical fiber formed from a glass preform substantially free of OH impurities is disclosed. The optical fiber is made to be free of OH impurities by a method having the steps of introducing a moving stream of vapor mixture including at least one compound glass-forming precursor together with an oxidizing medium into a tube, while generating a hydrogen-fee isothermal plasma on an outer surface of the tube to react the mixture and produce a glassy deposit on an inner surface of the tube. The glass preform is drawn to produce the optical fiber.

Abstract translation: 公开了一种由基本上不含OH杂质的玻璃预制件形成的光纤。 通过以下步骤使光纤不含OH杂质，该方法具有以下步骤：将包含至少一种复合玻璃形成前体的蒸气混合物与氧化介质一起引入管中，同时产生氢费等温 等离子体在管的外表面上以使混合物反应并在管的内表面上产生玻璃沉积物。 拉制玻璃预成型件以制造光纤。