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    Gradient index optical waveguide and method of making
    261.
    发明授权
    Gradient index optical waveguide and method of making 失效
    梯度折射率光波导及其制作方法

    公开(公告)号：US4358181A

    公开(公告)日：1982-11-09

    申请号：US171958

    申请日：1980-07-24

    Applicant: Suresh T. Gulati ,  George W. Scherer

    Inventor： Suresh T. Gulati ,  George W. Scherer

    IPC: C03B37/014 ,  G02B6/028 ,  C03B37/07 ,  C03B37/075

    CPC classification number: G02B6/0281 ,  C03B37/01413 ,  C03B2201/10 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/225 ,  C03B2203/26 ,  C03B2207/86

    Abstract: In the method of making a preform for a high numerical aperture gradient index optical waveguide, the concentration of two dopant constituents is changed during fabrication. Concentration of the first dopant, GeO.sub.2, is changed radially as the preform is built up in order to produce the desired radial refractive index gradient. The concentration of the second dopant, B.sub.2 O.sub.3, is changed radially to compensate for the radial change in thermal expansion coefficient caused by the varying GeO.sub.2 concentration. B.sub.2 O.sub.3 is added to the cladding layer to make the thermal expansion coefficient of the cladding equal to or greater than the composite thermal expansion coefficient of the core. The magnitude of residual tension at the inner surface caused by thermal expansion gradients is reduced and premature cracking of the preform is eliminated.

    Abstract translation: 在制造用于高数值孔径梯度折射率光波导的预成型件的方法中，两种掺杂剂组分的浓度在制造期间改变。 第一掺杂剂GeO 2的浓度随着预成型体的积累而径向变化，以产生所需的径向折射率梯度。 第二掺杂剂B 2 O 3的浓度径向地改变以补偿由变化的GeO 2浓度引起的热膨胀系数的径向变化。 将B 2 O 3添加到包覆层中以使包层的热膨胀系数等于或大于芯的复合热膨胀系数。 由热膨胀梯度引起的内表面的残余张力的大小减少，并且预制件的过早开裂被消除。

    Graded start rods for the production of optical waveguides
    263.
    发明授权
    Graded start rods for the production of optical waveguides 失效
    分级起始杆用于生产光波导

    公开(公告)号：US4298366A

    公开(公告)日：1981-11-03

    申请号：US57519

    申请日：1979-07-13

    Applicant: Franklin W. Dabby ,  Ronald B. Chesler

    Inventor： Franklin W. Dabby ,  Ronald B. Chesler

    IPC: C03B37/012 ,  C03B37/014 ,  G02B5/172

    CPC classification number: C03B37/01493 ,  C03B37/01205 ,  C03B37/01466 ,  C03B2201/10 ,  C03B2203/24

    Abstract: A process for preparing a glass rod having a graded refractive index for use as the start rod in the production of optical waveguides is disclosed. The process comprises depositing and sintering borosilicate particles on a glass rod to form a rod having a larger diameter than the original fused silica rod and drawing this rod to obtain a start rod having the same diameter as the original glass rod but exhibiting a partially radially graded refractive index. Optical waveguides prepared from such graded start rods have a more uniformly graded radial index of refraction profile.

    Abstract translation: 公开了一种制备具有渐变折射率的玻璃棒的方法，用于制造光波导的起始杆。 该方法包括将硼硅酸盐颗粒沉积并烧结在玻璃棒上以形成具有比原始熔融石英棒更大直径的棒，并拉伸该棒以获得具有与原始玻璃棒相同直径的起始棒，但呈现部分径向分级 折射率。 由这种分级启动棒制备的光波导具有更均匀分级的径向折射率分布。

    Apparatus and process for automatic control of the production of optical fiber
    264.
    发明授权
    Apparatus and process for automatic control of the production of optical fiber 失效
    自动控制光纤生产的设备和工艺

    公开(公告)号：US4294601A

    公开(公告)日：1981-10-13

    申请号：US57501

    申请日：1979-07-13

    Applicant: Franklin W. Dabby ,  Ronald B. Chesler

    Inventor： Franklin W. Dabby ,  Ronald B. Chesler

    IPC: C03B37/014 ,  C03B37/025 ,  C03B37/07 ,  C03B37/075

    CPC classification number: C03B37/01413 ,  C03B37/0148 ,  C03B2201/10 ,  C03B2207/54 ,  C03B2207/70

    Abstract: Apparatus and process for automatic control of the production of optical fiber are disclosed. The process comprises continuously depositing and sintering borosilicate glass particles on a fused silica rod or a graded index rod in such a manner that the glass exhibits a uniform, radially increasing concentration of boron. The appropriate boron oxide/silica concentration ratio in the glass particles is controlled by the time of deposit and the weight and diameter of the rod, which are continuously monitored. The concentration of boron oxide and silica in the particulate is likewise continuously monitored to insure that the correct portion of boron oxide/silica is deposited.The apparatus for conducting the process, includes means for continuously monitoring the weight and diameter of the rod and the boron oxide content of the glass particles and means for automatically regulating the equipment used to produce the optical fiber in response to readings from the monitoring means.

    Abstract translation: 公开了用于自动控制光纤生产的设备和方法。 该方法包括在熔融石英棒或梯度折射率棒上连续沉积和烧结硼硅酸盐玻璃颗粒，使得玻璃呈现均匀的径向增加的硼浓度。 玻璃颗粒中适当的氧化硼/二氧化硅浓度比由沉积时间和连续监测的棒的重量和直径来控制。 同样连续监测颗粒中的氧化硼和二氧化硅的浓度，以确保沉积氧化硼/二氧化硅的正确部分。 用于进行该方法的装置包括用于连续监测棒的重量和直径以及玻璃颗粒的氧化硼含量的装置，以及响应于来自监测装置的读数自动调节用于生产光纤的设备的装置。

    Method of making optical waveguides
    267.
    发明授权
    Method of making optical waveguides 失效
    制造光波导的方法

    公开(公告)号：US4125388A

    公开(公告)日：1978-11-14

    申请号：US877514

    申请日：1978-02-13

    Applicant: Dale R. Powers

    Inventor： Dale R. Powers

    IPC: C03B32/00 ,  C03B37/014 ,  C03B37/02

    CPC classification number: C03B37/01446 ,  C03B32/00 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/30 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03B2201/40 ,  C03B2201/42 ,  Y10S65/90

    Abstract: A method of making low loss glass optical waveguides, wherein at least one coating of glass soot is deposited by the flame hydrolysis process on a starting member. The starting member is removed from the coating material or glass soot preform leaving an aperture therein, and a tube is secured to one end of the preform. While the preform is heated to its consolidation termperature, an atmosphere including a drying agent flows from the tube into the aperture and through the porous preform, thereby removing water from the preform while the soot is consolidated to form a dense glass article. The tube can be removed, and the resultant dense glass article can be drawn into an optical waveguide fiber.

    Abstract translation: 一种制造低损耗玻璃光波导的方法，其中玻璃烟灰的至少一个涂层通过火焰水解过程沉积在起始构件上。 起始构件从涂层材料或玻璃烟炱预制件中移除，在其中留下孔，并且管固定到预成型件的一端。 当将预成型件加热至其固化温度时，包括干燥剂的气氛从管流入孔并通过多孔预型件，从而从烟炱中除去水，同时烟炱被固结形成致密的玻璃制品。 可以除去管，并将所得的致密玻璃制品拉入光波导纤维中。

    Multimode optical fiber
    270.
    发明授权
    Multimode optical fiber 失效
    多模光纤

    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。

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