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    Process for making rare earth doped optical fiber
    302.
    发明申请
    Process for making rare earth doped optical fiber 有权
    制造稀土掺杂光纤的工艺

    公开(公告)号：US20020124601A1

    公开(公告)日：2002-09-12

    申请号：US09800291

    申请日：2001-03-06

    Inventor： Tarun Bandyopadhyay ,  Ranjan Sen ,  Shyamal Kumar Bhadra ,  Kamal Dasgupta ,  Mukul Chandra Paul

    IPC: C03B037/075

    CPC classification number: C03B37/01838 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/36 ,  Y02P40/57

    Abstract: The present invention provides an improved process for making rare earth doped preforms and fibers by a combination of MCVD technique and solution doping method, said method comprising developing matched or depressed clad structure inside a silica glass substrate tube followed by deposition of unsintered particulate layer containing GeO2 and P2O5 for formation of the core and solution doping by soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing co-dopants like AlCl3/Al(NO3)3 in definite proportion, controlling the porosity of the soot, dipping period, strength of the solution and the proportion of the codopants to achieve the desired RE ion concentration in the core and minimize the core clad boundary defects and followed by drying, oxidation, dehydration and sintering of the RE containing porous deposit and collapsing at a high temperature to produce the preform and overdladding with silica tubes of suitable dimensions and fiber drawing to produce fibers.

    Abstract translation: 本发明提供了一种通过MCVD技术和溶液掺杂方法的组合制备稀土掺杂预成型件和纤维的改进方法，所述方法包括在石英玻璃基板管内形成匹配或凹陷的包层结构，随后沉积含有GeO 2的未烧结颗粒层 和P2O5，用于通过将多孔烟灰层以一定比例浸入含有Al-Al 3+（NO 3）3的共掺杂剂的RE盐的醇/水溶液中形成核心和溶液掺杂，控制烟灰的孔隙率，浸渍 时间，溶液的强度和共混物的比例以实现芯中期望的RE离子浓度，并使芯包覆边界缺陷最小化，随后使含RE的多孔沉积物进行干燥，氧化，脱水和烧结并在高处塌陷 温度以产生预成型件并用适当尺寸的硅胶管和纤维拉伸过度生产 纤维。

    Dispersion flattened fiber with high negative dispersion and method for the manufacture thereof
    304.
    发明申请
    Dispersion flattened fiber with high negative dispersion and method for the manufacture thereof 有权
    具有高负离散性的分散平坦纤维及其制造方法

    公开(公告)号：US20020061177A1

    公开(公告)日：2002-05-23

    申请号：US09776762

    申请日：2001-02-06

    Inventor： Jeong U. Jeon ,  Young Tark Lee

    IPC: G02B006/22

    CPC classification number: G02B6/03688 ,  C03B37/01807 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02233 ,  G02B6/02242 ,  G02B6/02252 ,  G02B6/02261

    Abstract: The invention relates to a dispersion flattened fiber (DFF) with high negative dispersion and a manufacturing method thereof. The dispersion flattened fiber comprises a central core; ring-type cores and low refractive regions alternately formed outside the central core; a cladding surrounding outside the ring-type cores and low refractive regions; and a coating outside the cladding. Since the dispersion flattened fiber has the dispersion of null20 to null60, it has a wide range of application and can be used for various purposes in the field of optical telecommunication.

    Abstract translation: 本发明涉及具有高负离散度的分散平坦纤维（DFF）及其制造方法。 分散扁平纤维包括中心芯; 环形芯和低折射区交替地形成在中心芯之外; 围绕环型芯和低折射区域的包层; 以及在包层外部的涂层。 由于色散扁平光纤具有-20至-60的色散，因此具有广泛的应用范围，可用于光通信领域的各种用途。

    Method for making glasses containing rare earth fluorides
    305.
    发明申请
    Method for making glasses containing rare earth fluorides 失效
    制造含稀土氟化物的玻璃的方法

    公开(公告)号：US20020017115A1

    公开(公告)日：2002-02-14

    申请号：US09915781

    申请日：2001-07-26

    Inventor： Huailiang Wei

    IPC: C03C025/66

    CPC classification number: C03C3/06 ,  C03B37/01433 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/50 ,  C03B2201/54 ,  C03C23/0095 ,  C03C2201/12 ,  C03C2201/31 ,  C03C2201/34 ,  C03C2203/50

    Abstract: A method that provides a new way to embed rare earth fluorides into silicate (or germania-doped silica) glasses by means of solution chemistry. Embedding rare earth fluorides into a silicate (or germania-doped silica) glass comprises the following steps. First, form a porous silicate core preform. Second, submerge the preform into an aqueous solution of rare earth ions. Third, remove the preform from the solution and wash the outside surfaces of the preform. Fourth, submerge the preform into an aqueous solution of a fluorinating agent to precipitate rare earth trifluorides from the solution and deposit in the pores or on the wall of the preform. This is followed by drying.

    Abstract translation: 一种通过溶液化学提供将稀土氟化物嵌入硅酸盐（或氧化锗掺杂二氧化硅）玻璃的新方法的方法。 将稀土氟化物嵌入硅酸盐（或掺锗二氧化硅）玻璃中包括以下步骤。 首先，形成多孔硅酸盐芯预制件。 第二，将预成型件浸入稀土离子的水溶液中。 第三，从溶液中取出预型件并洗涤预成型件的外表面。 第四，将预制件浸入氟化剂的水溶液中以从溶液中沉淀出稀土三氟化物，并沉积在预制件的孔或壁上。 然后干燥。

    Method and burner for forming silica-containing soot
    308.
    发明授权
    Method and burner for forming silica-containing soot 失效
    用于形成含二氧化硅的烟灰的方法和燃烧器

    公开(公告)号：US06260385B1

    公开(公告)日：2001-07-17

    申请号：US09292260

    申请日：1999-04-15

    Applicant: Daniel R. Sempolinski ,  Michael H. Wasilewski ,  C. Charles Yu

    Inventor： Daniel R. Sempolinski ,  Michael H. Wasilewski ,  C. Charles Yu

    IPC: C03B1914

    CPC classification number: C03B37/0142 ,  C03B19/106 ,  C03B19/1423 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2207/32 ,  C03B2207/34 ,  C03B2207/40 ,  C03B2207/46 ,  Y02P40/57 ,  Y10S65/08

    Abstract: A method and a burner for manufacturing silica-containing soot is disclosed. The method includes providing a liquid silicon-containing feedstock and a gas mixture and ejecting the liquid-gas mixture from an orifice into a combustion site to convert the silica-containing feedstock into silica containing soot. The burner includes a plurality of channels for delivering a gas to provide a flame, an effervescent atomizer for atomizing a liquid, silicon-containing feedstock and a rail for guiding the atomized liquid, silicon-containing feedstock into the burner flame. The method and burner can be used to produce silica-containing articles such as high purity fused silica optical members and waveguides.

    Abstract translation: 公开了一种用于制造含二氧化硅的烟灰的方法和燃烧器。 该方法包括提供液体含硅原料和气体混合物，并将液体 - 气体混合物从孔口喷射到燃烧位置以将含二氧化硅的原料转化成含二氧化硅的烟灰。 燃烧器包括用于输送气体以提供火焰的多个通道，用于雾化液体的含泡沫雾化器，含硅原料和用于引导雾化液体的轨道，含硅原料进入燃烧器火焰。 该方法和燃烧器可用于生产含二氧化硅的制品，例如高纯度熔融石英光学构件和波导。

    Method of fabricating optical fiber doped with rare earth element using volatile complex
    309.
    发明授权
    Method of fabricating optical fiber doped with rare earth element using volatile complex 失效
    使用挥发性络合物制造掺杂有稀土元素的光纤的方法

    公开(公告)号：US5961682A

    公开(公告)日：1999-10-05

    申请号：US745653

    申请日：1996-11-12

    Applicant: Yong-woo Lee ,  Alexey Nikolaevich Guryanov ,  Vladimir Fedororich Khopin ,  Dmitry D. Gusovsky

    Inventor： Yong-woo Lee ,  Alexey Nikolaevich Guryanov ,  Vladimir Fedororich Khopin ,  Dmitry D. Gusovsky

    IPC: G02B6/00 ,  C03B37/018 ,  C03B37/027

    CPC classification number: C03B37/01807 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2207/81 ,  C03B2207/90

    Abstract: A method of fabricating an optical fiber doped with a rare earth component using a volatile complex, which flattens the light frequency response under a stimulated emission of radiation principle using a modified chemical vapor deposition method. Silicon tetrachloride (SiCl.sub.4) and oxygen are injected into a quartz reaction tube under a heating process, so that a cladding layer is repeatedly deposited. Then, a volatile organic metal chelate, silicon tetrachloride and oxygen are injected into the quartz reaction tube, and then heated and water-cooled to form a porous layer. At the same time, a rare earth element is deposited on the porous layer, to thereby form a core layer. Thereafter, via a high heating process, a preform is completed. Then, an optical fiber is obtained from the preform via a drawing-out process. Here, hydroxide ions (OH.sup.-) which occur as the organic ligand is volatilized and cause an optical loss of the optical fiber is removed as the porous layer is formed by the water-cooling, and an added rare earth content is easily controlled, so that the rare earth with high concentration is evenly distributed. Also, since the core laver adopts SiO.sub.2 and Al.sub.2 O.sub.3 as a host material instead of GeO.sub.2, the difference in a refractive index between the cladding and core layers becomes greater then 0.025, to thereby provide the optical fiber with excellent optical characteristics.

    Abstract translation: 使用挥发性络合物制造掺杂有稀土元素的光纤的方法，其使用改进的化学气相沉积法在辐射原理的受激发射下使光频率响应平坦化。 在加热过程中将四氯化硅（SiCl 4）和氧气注入石英反应管中，从而重复沉积包覆层。 然后，将挥发性有机金属螯合物，四氯化硅和氧气注入石英反应管中，然后加热并水冷以形成多孔层。 同时，在多孔层上沉积稀土元素，从而形成芯层。 此后，通过高加热工艺，完成预制件。 然后，通过拉出工艺从预制棒获得光纤。 这里，作为有机配位体发生的氢氧根离子（OH-）挥发而引起光纤的光学损失，由于通过水冷而形成多孔层，所以容易控制添加的稀土含量 高浓度稀土均匀分布。 此外，由于核心紫菜采用SiO 2和Al 2 O 3作为主体材料代替GeO 2，所以包层和芯层之间的折射率差异大于0.025，从而为光纤提供优异的光学特性。

    Optical fiber waveguide
    310.
    发明授权
    Optical fiber waveguide 失效
    光纤波导

    公开(公告)号：US5956448A

    公开(公告)日：1999-09-21

    申请号：US750050

    申请日：1997-01-23

    Applicant: Francisco Martim Smolka ,  Robinson Luiz da Silva Braga

    Inventor： Francisco Martim Smolka ,  Robinson Luiz da Silva Braga

    IPC: G02B6/028 ,  C03B37/014 ,  G02B6/036 ,  G02B6/22

    CPC classification number: G02B6/02276 ,  C03B37/01413 ,  G02B6/0285 ,  G02B6/03694 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/36

    Abstract: Optical waveguide of the type comprising a core (10) presenting a refractive index (n.sub.1), maximal at least at its center; an optical cladding (20) involving core (10) and presenting a refractive index (n.sub.2) constant along its diametral extension and lower than the maximum refractive index (n.sub.1) of core (10) and further including a region defined by at least a stress-relieving intermediate portion (30) disposed between core (10) and the optical cladding (20), said intermediate portion presenting: a refractive index (n.sub.3), maximal along its diametral extension, at the maximum equal to the refractive index (n.sub.1) of core (10) and at least equal to refractive index (n.sub.2) of optical cladding (20), so as to provide an increase in the cutoff wavelength; a thermal expansion coefficient and a viscosity adequate to reduce the internal stress levels at least in core (10) of the optical waveguide to values which permit the obtention of acceptable attenuation and chromatic dispersion for a wavelength region.

    Abstract translation: PCT No.PCT / BR96 / 00012 Sec。 371日期1997年1月23日 102（e）日期1997年1月23日PCT提交1996年3月13日PCT公布。 出版物WO96 / 30788 PCT 日期：1996年10月3日该类型的光波导包括呈现折射率（n1）的芯（10），至少在其中心处最大; 包括芯（10）并且沿其直径延伸并且低于芯（10）的最大折射率（n1）的折射率（n2）恒定的光学包层（20），并且还包括由至少应力 设置在芯部（10）和光学包层（20）之间的中间部分（30），所述中间部分具有折射率（n3），其最大直径沿着其直径延伸，最大等于折射率（n1） （10）并且至少等于光学包层（20）的折射率（n2），以便提供截止波长的增加; 热膨胀系数和粘度足以将至少在光波导的纤芯（10）中的内部应力水平降低到允许获得波长区域的可接受的衰减和色散的值。

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