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    Method of manufacture of low water peak single mode optical fiber
    111.
    发明申请
    Method of manufacture of low water peak single mode optical fiber 审中-公开
    低水峰单模光纤的制造方法

    公开(公告)号：US20050000253A1

    公开(公告)日：2005-01-06

    申请号：US10874456

    申请日：2004-06-23

    Applicant: Kang Xie ,  Shuqiang Zhang ,  Qingrong Han ,  Tiejun Wang ,  Chenghou Tu ,  Raji Matai

    Inventor： Kang Xie ,  Shuqiang Zhang ,  Qingrong Han ,  Tiejun Wang ,  Chenghou Tu ,  Raji Matai

    IPC: C03B37/018

    CPC classification number: C03B37/01892 ,  C03B37/01807 ,  C03B37/0183 ,  C03B37/01853 ,  C03B37/01861 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/22 ,  C03B2201/31 ,  C03B2207/30 ,  C03B2207/32

    Abstract: The present invention directs to a method of manufacturing low water peak single mode optical fiber, which comprises performing deposition in a substrate tube using PCVD technology, whereby a deposited layer of a certain construction design is formed on the inner wall of the substrate tube, melt contracting the substrate tube into a solid core rod according to melt contraction technology, producing an optical fiber preform by combining the core rod and a jacket tube of low hydroxyl content by means of RIT technology or by depositing an outer cladding on the outer surface of the core rod using OVD technology, sending the optical fiber preform into a fiber drawing furnace to draw it into an optical fiber, wherein: in the PCVD technology, the content of impurities in a gas mixture of raw materials, which is characterized by the infrared spectrum transmissivity thereof, is required to a transmissivity of 90% or greater, the water content in O2 is 100 ppb or less, the water content in C2F6 is 1000 ppb or less, the hydroxyl content of the substrate tube is 1000 ppb or less, the dynamic leak rate of a deposition machine is 1.0×10−5 mbar·l/s or less; during melt contraction of the substrate tube, the dynamic leak rate of a melt contraction machine is 1.0×10−5 mbar·l/s or less; the hydroxyl content of the jacket tube of low hydroxyl content is required to be 10 ppm or less; the relative humidity of environment during the process of manufacture is 25% or less; the ratio of the cladding diameter to the core layer diameter (b/a value) in the waveguide structure of the optical fiber is from 2.0 to 7.0.

    Abstract translation: 本发明涉及制造低水峰单模光纤的方法，其包括使用PCVD技术在衬底管中进行沉积，由此在衬底管的内壁上形成一定的结构设计的沉积层，熔化 根据熔体收缩技术将衬底管收缩成实心芯棒，通过RIT技术将芯棒和低羟基含量的护套管组合在一起，或通过在外部表面上沉积外包层来生产光纤预制棒 使用OVD技术将光纤预制棒发送到光纤拉丝炉中，将其拉入光纤中，其中：在PCVD技术中，原料气体混合物中的杂质含量，其特征在于红外光谱 透过率为90％以上，O 2的含水量为100ppb以下，C2F6的含水量 为1000ppb以下，基材管的羟基含量为1000ppb以下，沉积机的动态泄漏率为1.0×10 -5 mbar·l / s以下。 在基材管熔融收缩期间，熔体收缩机的动态泄漏率为1.0×10 -5 mbar·l / s以下; 低羟基含量的护套的羟基含量为10ppm以下; 制造过程中环境的相对湿度为25％以下; 光纤的波导结构中的包层直径与芯层直径的比（b / a值）为2.0〜7.0。

    Method for producing an optical fibre and blank for an optical fibre
    115.
    发明申请
    Method for producing an optical fibre and blank for an optical fibre 审中-公开
    光纤用光纤和坯料的制造方法

    公开(公告)号：US20030140659A1

    公开(公告)日：2003-07-31

    申请号：US10296089

    申请日：2002-11-22

    Inventor： Heinz Fabian

    IPC: C03B037/028

    CPC classification number: C03B37/01211 ,  C03B37/014 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2201/12

    Abstract: In a known procedure for the manufacture of an optical fiber by drawing from a preform with a core-clad structure or from a coaxial arrangement of several components forming a core-clad structure, a core cylinder is produced with a soot deposition method, with the core cylinder having a core glass layer of a higher refractive index, nullnKnull, and outer diameter, nulldKnull, said core glass layer being encased by a first cladding glass layer having a lower refractive index, nullnM1null, and outer diameter, nulldM1null, followed by applying a second cladding glass layer onto the core cylinder. The modification of this procedure according to the invention is characterized by its lower optical fiber production costs. This is achieved by providing the second cladding glass layer (4) in the form of a cladding tube manufactured in a separate step of the procedure, said cladding tube having a mean OH concentration of max. 1 wt.-ppm, and applying the second cladding glass layer (4) by collapsing the cladding tube onto the core cylinder (2; 3), and by using a core cylinder with a nulldM1null/nulldKnull ratio between 1 and 2.2 and a mean OH concentration of max. 1 wt-ppm in its superficial area up to a depth of 10 nullm (FIG. 1).

    Abstract translation: 在通过从具有芯包层结构的预成型件或由形成芯包层结构的多个部件的同轴布置拉制制造光纤的已知方法中，使用烟灰沉积方法制造芯筒， 具有较高折射率的核心玻璃层“nK”和外径“dK”的芯部圆筒，所述芯部玻璃层被具有较低折射率的第一包层玻璃层“nM1”和外径 ，“dM1”，然后在核心圆筒上施加第二包层玻璃层。 根据本发明的该过程的修改的特征在于其较低的光纤生产成本。 这是通过在步骤的单独步骤中提供以包层管形式形成的第二包覆玻璃层（4）来实现的，所述包层管的平均OH浓度为最大。 1重量ppm，并且通过将包层管折叠到芯筒（2; 3）上并通过使用具有“dM1”/“dK”比的芯筒在1和1之间施加第二包层玻璃层 2.2和平均OH浓度最大。 在其表层面积为1重量ppm至10微米深度（图1）。

    Single mode optical fiber and manufacturing method therefor
    116.
    发明申请
    Single mode optical fiber and manufacturing method therefor 审中-公开
    单模光纤及其制造方法

    公开(公告)号：US20030110811A1

    公开(公告)日：2003-06-19

    申请号：US10304844

    申请日：2002-11-26

    Applicant: SINGLE MODE OPTICAL FIBER AND MANUFACTURING METHOD THEREFOR

    Inventor： Tomohiro Nunome ,  Hiroshi Kutami ,  Manabu Saitou ,  Kenji Okada ,  Munehisa Fujimaki ,  Koichi Harada

    IPC: C03B037/025

    CPC classification number: C03B37/01413 ,  C03B37/02718 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2205/56 ,  G02B6/03622 ,  Y02P40/57

    Abstract: An optical fiber is formed by performing vapor phase deposition of SiO2 on the outside of a glass rod comprising a core section and a first cladding section and drawing a glass preform which formed by a second cladding section. Also, a single mode optical fiber is manufactured so that the ratio of the diameter D of the first cladding section and the diameter d of the core section is in a range of 4.0 to 4.8, and OH concentration is 0.1 ppm or less. Also, an optical fiber is manufactured so that a value of D/d>4.8, and the OH concentration is 0.1 ppm or less. It is thereby possible to maintain an initial loss in the 1380 nm wavelength range even if hydrogen diffusion occurs.

    Abstract translation: 通过在包括芯部和第一包层部分的玻璃棒的外部进行SiO 2的气相沉积并且拉制由第二包层部形成的玻璃预制件来形成光纤。 此外，制造单模光纤，使得第一包层部分的直径D和芯部分的直径d的比率在4.0至4.8的范围内，并且OH浓度为0.1ppm或更小。 此外，制造光纤，使得D / d> 4.8，OH浓度为0.1ppm以下。 因此即使发生氢扩散，也可以保持1380nm波长范围的初始损耗。

    Quartz glass crucible and process for the production thereof
    117.
    发明申请
    Quartz glass crucible and process for the production thereof 有权
    石英玻璃坩埚及其制造方法

    公开(公告)号：US20030041623A1

    公开(公告)日：2003-03-06

    申请号：US09913632

    申请日：2001-08-16

    Inventor： Waltraud Werdecker ,  Johann Leist

    IPC: C03B019/09 ,  C03B020/00

    CPC classification number: C03C3/06 ,  C03B19/09 ,  C03B19/095 ,  C03B2201/04 ,  C03C2201/02 ,  C03C2201/23 ,  C03C2201/80 ,  C30B15/10 ,  C30B35/002 ,  Y10S65/04 ,  Y10T428/131

    Abstract: In order to provide a quartz glass crucible distinguished by high purity, high opacity and/or low transmissibility in the IR spectrum, it is proposed on the basis of a known quartz glass crucible of opaque quartz glass with a crucible body symmetrical in relation to a rotational axis, an outer zone (3) of opaque quartz glass transitioning radially toward the inside into an inner zone (2) of transparent quartz glass and with a density of at least 2.15 g/cm3, that according to the invention, the crucible body (1) be made of a synthetic SiO2 granulate with a specific BET surface ranging from 0.5 m2/g to 40 m2/g, a tamped volume of at least 0.8 g/cm3 and produced from at least partially porous agglomerates of SiO2 primary particles. A process for producing a quartz glass crucible of this kind is distinguished according to the invention in that for the production of the crucible a SiO2 granulate is used which was formed from at least partially porous agglomerates of synthetically manufactured SiO2 primary particles and that it has a specific BET surface ranging from 0.5 m2/g to 40 m2/g and a tamped volume of at least 0.8 g/cm3, the heating effected in such a way that a vitrification front advances from the inside outward while an inner zone (4) of transparent quartz glass is being formed.

    Abstract translation: 为了提供在IR光谱中具有高纯度，高不透明性和/或低透射率的石英玻璃坩埚，提出了在已知的不透明石英玻璃的石英玻璃坩埚的基础上，坩埚体相对于 旋转轴线，不透明石英玻璃的外部区域（3），径向朝向内部转变成透明石英玻璃的内部区域（2），密度为至少2.15g / cm 3，根据本发明，坩埚体 （1）由具有0.5m 2 / g至40m 2 / g的比BET表面的合成SiO 2颗粒制成，捣实体积至少为0.8g / cm 3并由SiO 2一次颗粒的至少部分多孔的附聚物制成。 根据本发明，制造这种石英玻璃坩埚的方法的不同之处在于，对于坩埚的制造，使用由至少部分多孔的合成SiO 2原生颗粒的聚集体形成的SiO 2颗粒，并且其具有 比表面积为0.5m2 / g〜40m2 / g，捣实体积为0.8g / cm 3以上，使玻璃化前沿从内侧向前方前进，同时将内部区域（4） 正在形成透明的石英玻璃。

    Discharge lamp and method of producing the same
    119.
    发明申请
    Discharge lamp and method of producing the same 失效

    公开(公告)号：US20020135305A1

    公开(公告)日：2002-09-26

    申请号：US10077954

    申请日：2002-02-20

    Inventor： Makoto Horiuchi ,  Makoto Kai ,  Mamoru Takeda

    IPC: H01J017/18

    CPC classification number: H01J61/302 ,  C03B23/0493 ,  C03B23/07 ,  C03B2201/04 ,  H01J9/247

    Abstract: The present invention provides a long-life discharge lamp by removing the causes of lowering the service life of the discharge lamp owing to quartz glass constituting the discharge lamp and a gas sealed therein, and also provides a discharge lamp production method wherein the mixing of impurities affecting the service life of the discharge lamp is prevented. In the discharge lamp the content of hydrogen, oxygen and their compounds existing in the light-emitting portion is such that the maximum intensity of the light-emitting spectral intensities of the above impurities is {fraction (1/1000)} or less of the intensity of the main light-emitting spectrum of the noble gas when glow discharge occurs by supplying a current of 3 mA, and also the content of OH groups included in the quartz glass of the sealing portions is 5 ppm or less by weight.

    Method of producing an optical fiber preform from a plurality of tubes having different thermal conductivities
    120.
    发明授权
    Method of producing an optical fiber preform from a plurality of tubes having different thermal conductivities 失效
    从具有不同热导率的多个管制造光纤预制棒的方法

    公开(公告)号：US5702497A

    公开(公告)日：1997-12-30

    申请号：US541555

    申请日：1995-10-10

    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 ,  C03B37/027

    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 capable of preventing an increase in an optical loss from occurring during fabrication and extraction of a single mode fiber preform and enhancement of an optical transmission efficiency, a method of producing the same comprising the steps of forming a first quartz robe having a first thermal conductivity, said first quartz tube being used as a clad; depositing a core layer and a clad layer inside the first quartz robe to form a preliminary perform by heating of the fist quartz robe; forming a second quartz tube having a second thermal conductivity lower than the first thermal conductivity; and depositing the second quartz tube to said preliminary preform by heating to produce the optical fiber preform. On embodiment, uses N overclad layers having thermal conductivites K.sub.x such that K.sub.0 >K.sub.1 >K.sub.2 . . . >K.sub.N and coefficients of viscosity .mu..sub.0

    Abstract translation: 公开了一种光纤，其能够防止在单模光纤预制件的制造和提取期间发生光损耗的增加，并提高光传输效率，其制造方法包括以下步骤：形成第一石英袍，其具有 第一导热系数，所述第一石英管用作包层; 在第一石英袍内部沉积核心层和覆层以通过加热第一石英袍形成预备性能; 形成具有低于第一导热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步预制件以产生所述光纤预制件。 在实施例中，使用具有导热系数Kx的N个外包层使得K0> K1> K2。 。 。 > KN，粘度系数μ0 <1。 。 。 小于N.

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