Eliminating crystals in non-oxide optical fiber preforms and optical fibers
    22.
    发明授权
    Eliminating crystals in non-oxide optical fiber preforms and optical fibers 有权
    消除非氧化物光纤预制棒和光纤中的晶体

    公开(公告)号:US07848606B1

    公开(公告)日:2010-12-07

    申请号:US12047805

    申请日:2008-03-13

    Abstract: A method is provided for eliminating crystals in non-oxide optical fiber preforms as well as optical fibers drawn therefrom. The optical-fiber-drawing axis of the preform is aligned with the force of gravity. A magnetic field is applied to the preform as it is heated to at least a melting temperature thereof. The magnetic field is applied in a direction that is parallel to the preform's optical-fiber-drawing axis. The preform is then cooled to a temperature that is less than a glass transition temperature of the preform while the preform is maintained in the magnetic field. When the processed preform is to have an optical fiber drawn therefrom, the preform's optical-fiber-drawing axis is again aligned with the force of gravity and a magnetic field is again applied along the axis as the optical fiber is drawn from the preform.

    Abstract translation: 提供了一种消除非氧化物光纤预制件中的晶体以及从其中拉出的光纤的方法。 预成型件的光纤拉伸轴与重力对齐。 当预热体被加热到至少其熔融温度时,施加磁场。 磁场沿与预成型件的光纤拉伸轴平行的方向施加。 然后将预成型件冷却至小于预成型件的玻璃化转变温度的温度,同时将预制件保持在磁场中。 当经处理的预成型件具有从其中拉出的光纤时,预成型件的光纤拉伸轴线再次与重力对准,并且随着从预成型件拉出光纤,沿轴线再次施加磁场。

    METHOD FOR MANUFACTURING OPTICAL FIBER
    27.
    发明公开
    METHOD FOR MANUFACTURING OPTICAL FIBER 审中-公开
    VERFAHREN ZUR HERSTELLUNG VON LICHTLEITFASER

    公开(公告)号:EP2019086A1

    公开(公告)日:2009-01-28

    申请号:EP07743129.4

    申请日:2007-05-10

    Abstract: To provide a process for producing an air cladding type optical fiber by a method other than extrusion molding.
    A process for producing an optical fiber comprising a hollow glass fiber with an optical transmission glass held to extend in its axial direction at its center, which process comprises a step of heating and drawing a glass rod having three or more holes with an equal diameter provided around its center axis to extend in its axial direction where the distance between each hole and the axis is mutually equal and the distance between adjacent holes is mutually equal, and a portion surrounded by such holes will constitute said optical transmission glass, while applying pressure to expand the holes with one end of the rod closed, to form a preform wherein glass between the holes is in a plate form, and subjecting the preform to wire drawing to form an optical fiber in which said optical transmission glass is held by plate glass.

    Abstract translation: 提供通过除挤出成型以外的方法制造空气包层型光纤的方法。 一种制造光纤的方法,包括:中空玻璃纤维,其具有保持在其中心轴向延伸的光学透射玻璃,该方法包括加热和拉制具有三个或更多个具有相同直径的孔的玻璃棒的步骤 围绕其中心轴线在其轴向方向上延伸,其中每个孔和轴之间的距离相互相等,并且相邻孔之间的距离相互相等,并且由这些孔包围的部分将构成所述光学透射玻璃,同时施加压力 在孔的一端封闭的情况下扩大孔,形成预成型件,其中孔之间的玻璃呈板状,并对预成型件进行拉丝,形成光学玻璃,其中所述光学透镜玻璃由平板玻璃保持。

    HOLEY OPTICAL FIBRES OF NON-SILICA BASED GLASS
    28.
    发明公开
    HOLEY OPTICAL FIBRES OF NON-SILICA BASED GLASS 审中-公开
    富士OPTISCHE FASERN AUS NICHT AUF SILICIUMDIOXID BASIERENDEM GLAS

    公开(公告)号:EP1313676A1

    公开(公告)日:2003-05-28

    申请号:EP01956671.0

    申请日:2001-08-13

    Abstract: To overcome problems of fabricating conventional core-clad optical fibre from non-silica based (compound) glass, it is proposed to fabricate non-silica based (compound) glass optical fibre as holey fibre i.e. one contining Longitudinal holes in the cladding. This removes the conventional problems associated with mismatch of the physical properties of the core and clad compound glasses, since a holey fibre can be made of a single glass composition. With a holey fibre, it is not necessary to have different glasses for the core and cladding, since the necessary refractive index modulation between core and cladding is provided by the microstructure of the clad, i.e. its holes, rather than by a difference in materials properties between the clad and core glasses. Specifically, the conventional thermal mismatch problems between core and clad are circumvented. A variety of fibre types can be fabricated from non-silica based (compounds) glasses, for example: single-mode fibre; photonic band gap fibre; highly non-linear fibre; fibre with photosensitivity written gratings and other refractive index profile structures; and rare-earth doped fibres (e.g. Er, Nd, Pr) to provide gain media for fibre amplifiers and lasers.

    Abstract translation: 为了克服从非二氧化硅(复合)玻璃制造常规的包芯光纤的问题,提出了制造非二氧化硅基(复合)玻璃光纤作为多孔纤维,即在包层中连续的纵向孔。 这消除了与芯和包覆复合玻璃的物理性能失配相关的常规问题,因为多孔纤维可以由单一玻璃组合物制成。 使用多孔纤维,由于芯和包层之间必需的折射率调制是通过包层的微结构(即其孔)而不是材料性质的差异来提供的,因此不需要具有用于芯和包层的不同的玻璃 在包层和核心眼镜之间。 具体来说,芯和包层之间常规的热失配问题被规避。 各种纤维类型可以由非二氧化硅(化合物)玻璃制成,例如:单模纤维; 光子带隙光纤; 高度非线性的纤维; 具有感光性的光纤写入光栅和其他折射率分布结构; 和稀土掺杂光纤(例如Er,Nd,Pr),为光纤放大器和激光器提供增益介质。

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