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    Determination of angular position of weak axial asymmetries of optical fibers and alignment of and splicing fibers
    1.
    发明公开
    Determination of angular position of weak axial asymmetries of optical fibers and alignment of and splicing fibers 失效
    确定光学纤维的弱轴不对称和对准和纤维的剪接的角位置

    公开(公告)号：EP0819958A1

    公开(公告)日：1998-01-21

    申请号：EP97850115.3

    申请日：1997-07-15

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Zheng, Wenxin

    IPC分类号： G02B6/255

    CPC分类号： G01M11/37 ,  G02B6/2551

    摘要： In the determination of the angular rotational position of axial asymmetries of bodies like optical PM-fibers such a body or fiber is illuminated during rotations (201) thereof to different angular positions around its longitudinal axis. For different angular positions the difference is then determined between light, which has passed through the fiber end and in its position corresponds to the central part of the fiber, and light, which has passed through the fiber end and in its position corresponds to the region of the fiber located immediately outside the central part. These differences, considered as a function of the rotation angle, constitute a curve that is analyzed (205) for finding the regions thereof having the steepest descent or increase, such as a valley region. Only these regions are then used (207, 209) for determining the position of the optical asymmetries. Thus the fiber can be rotated (207) during only this interval determining the curve more accurately by using more densely spaced measurement points within the interval. Such a determination is particularly suited for PM-fibers having very small optical asymmetries such as fibers having an elliptical core.

    摘要翻译： 在像光学PM-纤维体的轴向不对称的角度旋转位置的确定检查的身体或纤维被旋转（201）到其围绕其纵向轴线的不同角位置期间照亮。 对于不同的角位置的差然后确定性光，其具有通过纤维端部，并在其位置对应于所述纤维的中心部分，和光，其具有通过纤维端部，并在其位置通过传递之间开采对应于区域 的紧位于中央部的外侧的纤维。 这些差异，考虑作为旋转角度的函数，构成了曲线也被用于发现的区域及其具有最陡下降或上升，检查作为谷区域进行分析（205）。 然后仅将这些区域中使用（207，209），用于确定采矿光学不对称的位置。 因此，纤维可以在此间隔仅确定性采矿曲线更精确地由间隔内使用更密集间隔的测量点设定过程中旋转（207）。 这样的确定是特别适用于具有非常小的光纤不对称PM-纤维：诸如具有到椭圆芯。

    Automatic fusion-temperature control for optical fiber splicers
    5.
    发明公开
    Automatic fusion-temperature control for optical fiber splicers 失效
    Automatische Steuerung der SchmelztemperaturfürSpleissgerätevon optischen Fasern

    公开(公告)号：EP0740172A1

    公开(公告)日：1996-10-30

    申请号：EP96850083.5

    申请日：1996-04-26

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Zheng, Wenxin

    IPC分类号： G02B6/255 ,  G01K11/06

    CPC分类号： G01K11/06 ,  G02B6/2551

    摘要： For measuring and controlling the temperature of a splice portion between two optical fiber (1, 1') ends, during the splicing process when the material of the ends is heated to be fusioned, the time-dependency of the surface tension effect for viscous liquids is utilized. Then the fiber (1, 1') ends are placed for splicing with a relatively large lateral offset in the retainers (39) of fiber splicer and are spliced by the heat of an electric arc generated between the welding electrodes (43). The heating of the fiber ends is continued, whereby the offset of the fiber ends will gradually decrease due to the surface tension. The offset is then measured at different times during the continued heating and from these determined values and the times when they were measured the temperature of the heated fiber end portions is determined. This temperature value may then be compared to a predetermined set value for control of the heating of the splice region. Hereby also offset attenuators can be made having relatively accurate, predetermined attenuation values.

    摘要翻译： 为了测量和控制两个光纤（1,1'）端之间的接合部分的温度，在接头处理期间当端部的材料被加热以被熔化时，粘性液体的表面张力效应的时间依赖性 被利用。 然后将纤维（1,1'）端部放置成用于在纤维捻接器的保持器（39）中具有相对大的侧向偏移的拼接，并且通过在焊接电极（43）之间产生的电弧的热而被接合。 纤维端部的加热继续进行，纤维端部的偏移由于表面张力而逐渐降低。 然后在连续加热期间的不同时间测量偏移量，并测定这些测定值和测量加热纤维端部部分的温度时的时间。 然后将该温度值与预定设定值进行比较，以控制接合区域的加热。 因此，也可以使衰减器具有相对准确的预定衰减值。

    Optical fiber attenuator
    6.
    发明公开
    Optical fiber attenuator 失效
    FiberoptischesDämpfungsglied

    公开(公告)号：EP0740171A1

    公开(公告)日：1996-10-30

    申请号：EP96850082.7

    申请日：1996-04-26

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Zheng, Wenxin ,  Hultén, Ola

    IPC分类号： G02B6/255 ,  G02B6/26

    CPC分类号： G02B6/2551 ,  G02B6/266

    摘要： Optical fiber attenuators are produced by splicing two fiber ends by melt-fusioning. The fiber ends are initially placed with a large lateral offset and the heating of the spliced portion is continued during a long time period to completely align the fiber ends, in particular the cores (3) and claddings (2) thereof, and to make material of the fibers cores (3) diffuse (23) into the neighbouring regions of the fiber claddings. By properly choosing the extended time for prolonged heating attenuators can be produced with a good repeatability. The prolonged heating period is significantly shortened by the use of a large initial offset.

    摘要翻译： 光纤衰减器是通过熔融融合将两个纤维端接合而产生的。 纤维端部最初放置有较大的侧向偏移，并且接合部分的加热在长时间内持续，以完全对准纤维端部，特别是芯部（3）和包层（2），并使材料 的纤维芯（3）扩散（23）到纤维包层的相邻区域。 通过适当选择长时间加热的延长时间可以产生具有良好重复性的衰减器。 通过使用大的初始偏移量，延长的加热周期被显着缩短。