Optical fibre
    291.
    发明申请
    Optical fibre 失效
    光纤

    公开(公告)号:US20040091222A1

    公开(公告)日:2004-05-13

    申请号:US10466442

    申请日:2003-11-04

    Abstract: An optical fibre being optically transmissive at a predetermined wavelength of light null and comprising a plurality of coaxial layers. Each layer having an optical path length that varies radially, the coaxial layers being arranged to give the fibre a refractive index profile which, in use, causes sufficient Fresnel diffraction of the light such that it is guided in the fibre. The refractive index of a cladding region (60) is intermittently suppressed by controlling heating of the preform tube, thus forming a chirped saw-tooth profile (70). The optical fibre may include a lens. In this case, each of the layers has an optical path length that increases gradually outwardly by substantially nnullnull/2 (n: integer).

    Abstract translation: 光纤在光λ的预定波长处是光学透射的并且包括多个同轴层。 每个层具有径向变化的光程长度,同轴层布置成使光纤具有折射率分布,其在使用中引起光的足够的菲涅尔衍射,使得其在光纤中被引导。 通过控制预成型管的加热来间歇地抑制包层区域(60)的折射率,从而形成啁啾的锯齿形轮廓(70)。 光纤可以包括透镜。 在这种情况下,每个层具有通过基本上nxλ/ 2(n:整数)逐渐向外增加的光程长度。

    Double-clad optical fiber for lasers and amplifiers
    292.
    发明申请
    Double-clad optical fiber for lasers and amplifiers 审中-公开
    用于激光和放大器的双包层光纤

    公开(公告)号:US20040069019A1

    公开(公告)日:2004-04-15

    申请号:US10680396

    申请日:2003-10-07

    Abstract: A double-clad optical fiber includes a core, a multimode inner cladding disposed about the core, and a second cladding layer disposed about the inner cladding. The core includes an active material for absorbing pump radiation received by the inner cladding. The multimode inner cladding includes truncated regions including a first material, where the first material has an index of refraction that is different than the material of the inner cladding that surrounds said truncated regions, for promoting the scattering of pump radiation propagating in the multimode inner cladding for increasing the absorption of the pump radiation by the active material of the core. The truncated regions can include voids that are empty or that comprise a gas. Particles can be distributed in a soot and/or voids formed in the soot, where the soot can be deposited via Outside Vapor Deposition for forming the truncated regions in an optical fiber drawn from a preform.

    Abstract translation: 双包层光纤包括芯,围绕芯设置的多模内包层和围绕内包层设置的第二包层。 该芯包括用于吸收由内包层接收的泵浦辐射的活性材料。 多模内包层包括包括第一材料的截面区域,其中第一材料的折射率不同于围绕所述截顶区域的内包层的材料,用于促进在多模内包层中传播的泵浦辐射的散射 用于增加核辐射的活性物质对泵辐射的吸收。 截断的区域可以包括空的或包含气体的空隙。 颗粒可以分布在烟灰中形成的烟灰和/或空隙中,其中烟炱可以通过外部气相沉积沉积,以形成从预成型体拉制的光纤中的截面区域。

    Dispersion compensating fiber with reduced splice loss and methods for making same
    299.
    发明申请
    Dispersion compensating fiber with reduced splice loss and methods for making same 有权
    具有降低接合损耗的色散补偿光纤及其制作方法

    公开(公告)号:US20020159735A1

    公开(公告)日:2002-10-31

    申请号:US09778413

    申请日:2001-02-07

    Abstract: A dispersion compensating fiber is described having a core and cladding. The cladding has a first cladding region surrounding the core, a second cladding region surrounding the first cladding layer, and a third cladding region surrounding the second cladding layer. The core, and the first, second, and third cladding regions are doped to create a refraction index profile characteristic of dispersion compensating fiber. A portion of the cladding is doped with phosphorus, thereby resulting in splice loss reduction.

    Abstract translation: 描述了具有芯和包层的色散补偿光纤。 包层具有围绕芯的第一包层区域,围绕第一包层的第二包层区域和围绕第二包层的第三包层区域。 将芯和第一,第二和第三包层区域掺杂以产生色散补偿光纤的折射率分布特性。 包层的一部分掺杂有磷,从而导致熔接损耗降低。

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