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    Optical fiber and method for producing the same
    182.
    发明授权
    Optical fiber and method for producing the same 失效
    光纤及其制造方法

    公开(公告)号：US4206968A

    公开(公告)日：1980-06-10

    申请号：US874420

    申请日：1978-02-02

    Applicant: Tsuneo Suganuma ,  Gyozo Toda ,  Koji Ishida ,  Shin Satoh ,  Toshio Katsuyama ,  Mamoru Sugie

    Inventor： Tsuneo Suganuma ,  Gyozo Toda ,  Koji Ishida ,  Shin Satoh ,  Toshio Katsuyama ,  Mamoru Sugie

    IPC: C03B37/018 ,  C03C13/04 ,  G02B6/00 ,  G02B6/02 ,  G02B5/14

    CPC classification number: C03C13/045 ,  C03B37/018 ,  C03B37/01861 ,  G02B6/02 ,  C03B2201/08 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/22

    Abstract: A method for producing an optical fiber comprises (i) the step of depositing a barrier layer on the inner wall surface of a glass tube by the CVD (chemical vapor deposition) process, said barrier layer being capable of preventing the diffusion of impurities and being made of high-silica glass which has a refractive index that is substantially equal to that of the glass tube and which contains at least one substance for lowering the refractive index of silica and at least one substance for raising the refractive index of silica, (ii) the step of depositing a glass film of desired refractive index on the barrier layer by the CVD process, (iii) the step of heating and collapsing the resultant glass tube into a composite rod or the so-called optical fiber preform, and (iv) the step of heating and drawing said optical fiber preform into the optical fiber, whereby the optical fiber which has the impurity diffusion-preventing layer between the core and the outside glass layer can be easily produced.

    Abstract translation: 制造光纤的方法包括：（i）通过CVD（化学气相沉积）工艺在玻璃管的内壁表面上沉积阻挡层的步骤，所述阻挡层能够防止杂质的扩散，并且 由高二氧化硅玻璃制成，其折射率基本上等于玻璃管的折射率，并且含有至少一种用于降低二氧化硅和至少一种用于提高二氧化硅的折射率的物质的物质（ii） ）通过CVD工艺在阻挡层上沉积所需折射率的玻璃膜的步骤，（iii）将所得玻璃管加热和塌缩成复合棒或所谓的光纤预制件的步骤，（iv ）将所述光纤预制件加热和拉制成光纤的步骤，由此在核心和外部玻璃层之间具有杂质扩散防止层的光纤可以容易地 引起

    Method for producing high quality fused silica
    183.
    发明授权
    Method for producing high quality fused silica 失效
    生产高质量二氧化硅的方法

    公开(公告)号：US3806570A

    公开(公告)日：1974-04-23

    申请号：US23974272

    申请日：1972-03-30

    Applicant: CORNING GLASS WORKS

    Inventor： VOORHEES F ,  FLAMENBAUM J ,  SCHULTZ P

    IPC: C03B37/018 ,  C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C04B35/14 ,  C23C16/40 ,  G02B6/00 ,  F27B9/04

    CPC classification number: C23C16/402 ,  C03B19/1415 ,  C03B19/1492 ,  C03B37/01413 ,  C03B37/0142 ,  C03B37/01446 ,  C03B37/01493 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2201/54 ,  C03B2207/62 ,  C03B2207/90 ,  C04B35/14 ,  C23C16/401

    Abstract: There is disclosed a method and apparatus for providing optically pure water-free fused silica blanks, tubing and crucibles for use in forming optical waveguides, lenses, prisms, filters, and high temperature lamp envelopes, in which soot is deposited on a high purity graphite bait or refractory low expansion glass, glass-ceramic or suitable crystalline ceramic bait by a flame hydrolysis method in which the burner is located close to the bait. This results in an exceptionally dense soot preform. The preform is later sintered in an inert dry atmosphere by slowly inserting the soot covered bait into a furnace in such a manner that entrapped gas is forced from the fused silica during the slow insertion into the furnace maintained at a temperature above 1,400*C. The formation of bubbles within the fused silica is prevented because of the inert atmosphere and because the gases in the preform escape through the unsintered portions of the preform, thereby providing a crucible or blank of fused silica of exceptionally high optical quality.

    Abstract translation: 公开了一种用于提供用于形成光波导，透镜，棱镜，过滤器和高温灯泡的光学纯净无水熔融石英毛坯，管和坩埚的方法和装置，其中烟灰沉积在高纯度石墨上 诱饵或耐火低膨胀玻璃，玻璃陶瓷或适宜的结晶陶瓷诱饵，其中燃烧器位于靠近诱饵的火焰水解方法。 这导致了非常密集的烟灰预制件。 将预制件随后在惰性干燥气氛中通过将烟炱覆盖的饵料慢慢地插入炉中以使得在缓慢插入保持在1400℃以上的炉中的熔融二氧化硅的方式被迫使气体被压制的惰性干燥气氛中烧结。 由于惰性气氛，因为预制件中的气体逸出预成型体的未烧结部分，因此可以防止熔融二氧化硅内的气泡的形成，从而提供极高的光学质量的熔融二氧化硅的坩埚或坯料。

    METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS
    189.
    发明申请
    METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS 审中-公开
    用选择性扩散层形成光纤预制件的方法

    公开(公告)号：US20140174133A1

    公开(公告)日：2014-06-26

    申请号：US14107259

    申请日：2013-12-16

    Applicant: Amanda Lee Billings ,  Liam Ruan de Paor ,  Robert Brett Desorcie ,  Robert Arnold Knowlton ,  Pushkar Tandon

    Inventor： Amanda Lee Billings ,  Liam Ruan de Paor ,  Robert Brett Desorcie ,  Robert Arnold Knowlton ,  Pushkar Tandon

    IPC: C03B37/014 ,  G02B6/036

    CPC classification number: C03B37/01446 ,  C03B37/014 ,  C03B37/01413 ,  C03B37/01453 ,  C03B2201/08 ,  C03B2201/20 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2203/22 ,  C03B2207/36 ,  G02B6/036

    Abstract: Methods for forming optical fiber preforms are disclosed. According to one embodiment, a method for forming an optical fiber preform includes forming a preform core portion from silica-based glass soot. The silica-based glass soot may include at least one dopant species for altering an index of refraction of the preform core portion. A selective diffusion layer of silica-based glass soot may be formed around the preform core portion to form a soot preform. The selective diffusion layer may have an as-formed density greater than the density of the preform core portion. A diffusing species may be diffused through the selective diffusion layer into the preform core portion. The soot preform may be sintered such that the selective diffusion layer has a barrier density which is greater than the as-formed density and the selective diffusion layer prevents diffusion of the at least one dopant species through the selective diffusion layer.

    Abstract translation: 公开了形成光纤预制棒的方法。 根据一个实施例，用于形成光纤预制棒的方法包括从二氧化硅基玻璃烟炱形成预制芯部分。 二氧化硅基玻璃烟炱可以包括至少一种用于改变预制核心部分的折射率的掺杂物种类。 二氧化硅基玻璃烟炱的选择性扩散层可以在预制核心部分周围形成，以形成烟炱预制件。 选择性扩散层可以具有大于预制核心部分的密度的形成密度。 扩散物质可以通过选择性扩散层扩散到预制核心部分中。 烟炱预制件可以烧结，使得选择性扩散层具有大于形成密度的势垒密度，并且选择性扩散层防止至少一种掺杂剂物质通过选择性扩散层的扩散。

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