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    HOLEY OPTICAL FIBRES OF NON-SILICA BASED GLASS
    21.
    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

    Applicant: UNIVERSITY OF SOUTHAMPTON

    Inventor： BRODERICK, Neil, Gregory, Raphael ,  HEWAK, Daniel, William,University of Southampton ,  MONRO, Tanya, Mary,University of Southampton ,  RICHARDSON, David, John,University of Southampton ,  WEST, Yvonne, Deana,University of Southampton

    IPC: C03C13/04 ,  C03B37/012 ,  G02B6/20

    CPC classification number: G02B6/02347 ,  C03B37/01205 ,  C03B37/0122 ,  C03B2201/60 ,  C03B2201/62 ,  C03B2201/70 ,  C03B2201/78 ,  C03B2201/80 ,  C03B2201/82 ,  C03B2201/83 ,  C03B2201/84 ,  C03B2201/86 ,  C03B2201/88 ,  C03B2203/14 ,  C03B2203/42 ,  C03C13/04 ,  C03C13/041 ,  C03C13/046 ,  C03C13/048 ,  C03C25/106 ,  C03C25/1062 ,  G02B6/02361

    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。

    PROCESS FOR PRODUCING OPTICAL FIBER
    25.
    发明申请
    PROCESS FOR PRODUCING OPTICAL FIBER 审中-公开
    生产光纤的工艺

    公开(公告)号：US20090095024A1

    公开(公告)日：2009-04-16

    申请号：US12272101

    申请日：2008-11-17

    Applicant: Tatsuo NAGASHIMA ,  Tomoharu Hasegawa ,  Seiki Ohara ,  Naoki Sugimoto

    Inventor： Tatsuo NAGASHIMA ,  Tomoharu Hasegawa ,  Seiki Ohara ,  Naoki Sugimoto

    IPC: C03B37/075

    CPC classification number: G02B6/02371 ,  C03B37/0124 ,  C03B37/01254 ,  C03B2201/60 ,  C03B2201/62 ,  C03B2201/78 ,  C03B2203/16 ,  C03B2203/42 ,  C03C13/048 ,  G02B6/02333 ,  G02B6/02366

    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，该光纤包括中空玻璃纤维，该中空玻璃纤维具有保持其轴向在其中心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 围绕其中心轴线延伸，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。

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