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    Doped optical fiber having core and clad structure for increasing the amplification band of an optical amplifier using the optical fiber
    62.
    发明授权
    Doped optical fiber having core and clad structure for increasing the amplification band of an optical amplifier using the optical fiber 失效
    具有用于增加使用光纤的光放大器的放大频带的芯和包层结构的掺杂光纤

    公开(公告)号：US5778129A

    公开(公告)日：1998-07-07

    申请号：US727776

    申请日：1996-10-08

    Applicant: Norifumi Shukunami ,  Shinya Inagaki

    Inventor： Norifumi Shukunami ,  Shinya Inagaki

    IPC: G02B6/00 ,  C03B37/018 ,  G02B6/036 ,  G02B6/255 ,  H01S3/067 ,  G02B6/22

    CPC classification number: G02B6/03688 ,  C03B37/01807 ,  C03B37/01838 ,  G02B6/03611 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/2551 ,  H01S3/06708 ,  C03B2201/02 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/22 ,  G02B6/03694 ,  H01S3/06729

    Abstract: An optical fiber having a core for propagating light, where the core includes first, second and third regions. The first, second and third regions are concentrically arranged with the second region around the first region and the third region around the second region. The third region includes a dopant for increasing the refractive index of the third region. The first region includes a first dopant for providing an amplification band and a second dopant for expanding the amplification band. The second region has an impurity concentration which is lower than the concentration of the dopant in the third region and is lower than the concentrations of the first and second dopants in the first region. Upon production of the fiber, the second region acts as a barrier to prevent diffusion of dopants. As a result, the amplification band can be effectively expanded. Various other arrangements of core and clad regions and dopants are provided. An optical amplifier using the various types of fibers is disclosed, as is a fiber having a structure which reduces loss when spliced to another fiber, and a method for splicing the fibers together.

    Abstract translation: 一种具有用于传播光的芯的光纤，其中所述芯包括第一，第二和第三区域。 第一，第二和第三区域同心地布置有围绕第一区域的第二区域和围绕第二区域的第三区域。 第三区域包括用于增加第三区域的折射率的掺杂剂。 第一区域包括用于提供放大频带的第一掺杂剂和用于扩展放大频带的第二掺杂剂。 第二区域的杂质浓度低于第三区域中的掺杂剂的浓度，并且低于第一区域中的第一和第二掺杂剂的浓度。 在制造纤维时，第二区域用作防止掺杂剂扩散的屏障。 结果，能够有效地扩大放大频带。 提供了核心和包覆区域和掺杂剂的各种其它布置。 公开了使用各种类型的光纤的光放大器，以及具有在与另一光纤接合时减少损耗的结构的光纤，以及将光纤拼接在一起的方法。

    Technique to prepare high-reflectance optical fiber bragg gratings with single exposure in-line or fiber draw tower
    65.
    发明授权
    Technique to prepare high-reflectance optical fiber bragg gratings with single exposure in-line or fiber draw tower 失效
    制备具有单次曝光在线或纤维拉制塔的高反射率光纤布拉格光栅的技术

    公开(公告)号：US5400422A

    公开(公告)日：1995-03-21

    申请号：US6544

    申请日：1993-01-21

    Applicant: Charles G. Askins ,  Edward J. Friebele

    Inventor： Charles G. Askins ,  Edward J. Friebele

    IPC: C03B37/027 ,  C03C25/62 ,  G02B6/34

    CPC classification number: G02B6/02133 ,  C03B37/027 ,  C03C25/6226 ,  C03C25/6233 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/18 ,  C03B2205/20 ,  G02B2006/02157

    Abstract: A process for making an optical reflection grating in a glass fiber includes exposing an unjacketed optic fiber to a single writing pulse from a pair of interfering light beams that form an interference pattern in the fiber. A novel optical fiber has at least one optical grating with a preselected Bragg spacing in at least one region of the fiber, with a periodic modulation in its index of refraction, with high thermal stability and narrow linewidth. A process for making an array of optical reflection gratings in a glass fiber includes exposing a fiber to a plurality of writing pulse from a pair of interfering light beams that form an interference pattern in the fiber, where these pulses are applied sequentially as the fiber is drawn from a draw furnace. A novel optical fiber has a plurality of unspliced gratings with high thermal stability and narrow linewidth.

    Abstract translation: 用于在玻璃纤维中制造光学反射光栅的工艺包括将未封装的光纤暴露于在光纤中形成干涉图案的一对干涉光束的单个写入脉冲。 一种新颖的光纤具有在光纤的至少一个区域中具有预选布拉格间隔的至少一个光栅，其折射率具有周期性调制，具有高热稳定性和窄线宽。 用于在玻璃纤维中制造光学反射光栅阵列的工艺包括将光纤暴露于来自在光纤中形成干涉图案的一对干涉光束的多个写入脉冲，其中这些脉冲是随着光纤被依次施加的 从拉丝机拉出。 新颖的光纤具有多个具有高热稳定性和窄线宽的未切割光栅。

    Quartz glass doped with rare earth element and production thereof
    68.
    发明授权
    Quartz glass doped with rare earth element and production thereof 失效
    掺杂稀土元素的石英玻璃及其制备

    公开(公告)号：US5262365A

    公开(公告)日：1993-11-16

    申请号：US778062

    申请日：1991-12-05

    Applicant: Akira Oyobe ,  Kazunori Nakamura ,  Nobuyuki Kagi ,  Yasumasa Sasaki

    Inventor： Akira Oyobe ,  Kazunori Nakamura ,  Nobuyuki Kagi ,  Yasumasa Sasaki

    IPC: C03B19/14 ,  C03B37/014 ,  C03B37/016 ,  C03B37/018 ,  C03C3/06 ,  C03C3/095 ,  C03C4/12 ,  C03C13/04 ,  C03C23/00

    CPC classification number: C03C13/045 ,  C03B19/1438 ,  C03B19/1453 ,  C03B37/01433 ,  C03B37/01446 ,  C03B37/016 ,  C03B37/01838 ,  C03B37/01853 ,  C03C23/0095 ,  C03C3/06 ,  C03C3/095 ,  C03C4/12 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2201/36 ,  C03C2201/12 ,  C03C2201/31 ,  C03C2201/3435 ,  C03C2201/3476 ,  C03C2201/36 ,  C03C2203/50 ,  Y10S501/90 ,  Y10S65/16

    Abstract: Rare earth element doped silica glass according to the invention is prepared by doping silica-based glass co-doped with a rare earth element and aluminum additionally with fluorine and has excellent physical properties including remarkable light emission characteristics and an excellent capability of being fused with other silica-based glass. Such doped silica glass provides high amplification gains and a wide wavelength bandwidth and therefore can be used as a material for manufacturing miniaturized optical devices. Particularly, since the manufacturing process adapted to produce rare earth element doped silica glass according to the invention does not involve crystallization that normally characterizes the type of doped silica glass under consideration, the obtained doped silica glass is transparent and totally free from air bubbles. As a method for manufacturing rare earth doped silica glass according to the invention combines means for producing articles made of porous glass and a solution impregnation method, it provides easy and effective means for manufacturing rare earth doped silica glass which is co-doped with both a rare earth element and aluminum and highly transparent and therefore can be used as a suitable material for active optical devices.

    Abstract translation: PCT No.PCT / JP91 / 00134 Sec。 371 1991年12月5日第 102（e）日期1991年12月5日PCT 1991年2月5日提交PCT公布。 公开号WO91 / 11401 1991年8月8日。根据本发明的稀土元素掺杂二氧化硅玻璃通过掺杂稀土元素和铝另外掺杂的二氧化硅基玻璃掺杂制备，并且具有优异的物理性能，包括显着的发光特性和 与其他二氧化硅基玻璃融合的优异能力。 这种掺杂的石英玻璃提供高的放大增益和宽的波长带宽，因此可以用作制造小型化光学器件的材料。 特别地，由于根据本发明的适用于生产稀土元素掺杂石英玻璃的制造方法不涉及通常表征所考虑的掺杂石英玻璃的类型的结晶，所获得的掺杂石英玻璃是透明的并且完全没有气泡。 作为根据本发明的稀土掺杂石英玻璃的制造方法，结合了用于制造由多孔玻璃制成的制品和溶液浸渍方法的装置，其提供了用于制造稀土掺杂石英玻璃的简单和有效的手段，其掺杂有 稀土元素和铝，并且高度透明，因此可以用作有源光学器件的合适材料。

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