Holder for annealing fiber optic coils
    1.
    发明授权
    Holder for annealing fiber optic coils 失效
    光纤线圈退火支架

    公开(公告)号:US5570449A

    公开(公告)日:1996-10-29

    申请号:US407188

    申请日:1995-03-21

    摘要: A holder for annealing a fiber optic coil uses a silica ring on a silica substrate, or silica tubular coil, either of which may be directly incorporated into a coil subassembly for a Faraday-effect current sensor. The ring may be formed in a silica plate by sandblasting or grinding, or formed separately and adhered to the plate. In the tubular holder embodiment, silica tubes and sleeves are used to protect fusion splices between the ends of the fiber coil and polarizing fibers. Use of silica for most of the subassembly components matches the coefficients of thermal expansion of the subassembly to that of the fiber coil, and also allows the coil to be annealed at extremely high temperatures. Annealing yields fiber coils of lowered birefringence, particularly when used with spun fibers. Ferrules are used to adjust the angular orientation of the fibers with respect to their planes of polarization.

    摘要翻译: 用于退火光纤线圈的保持器使用二氧化硅衬底上的二氧化硅环或二氧化硅管状线圈,其中任一个可以直接并入用于法拉第效应电流传感器的线圈子组件中。 环可以通过喷砂或研磨在二氧化硅板中形成,或者单独形成并粘附到板上。 在管状保持器实施例中,使用石英管和套管来保护纤维线圈的端部和偏振纤维之间的熔接。 大多数子组件部件使用二氧化硅将子组件的热膨胀系数与纤维线圈的热膨胀系数相匹配,并且还允许线圈在极高温度下退火。 退火产生具有降低的双折射的纤维线圈,特别是当与纺丝纤维一起使用时。 套圈用于调整纤维相对于它们的极化平面的角取向。

    Single-mode, single-polarization optical fiber
    9.
    发明授权
    Single-mode, single-polarization optical fiber 失效
    单模,单极化光纤

    公开(公告)号:US5056888A

    公开(公告)日:1991-10-15

    申请号:US381038

    申请日:1989-07-17

    摘要: A single-mode, single-polarization optical fiber ("PZ fiber") can have a large single-polarization wavelength bandwidth when .eta. (as herein defined) for one symmetry axis is positive when calculated from the refractive index profile determined with one of two orthogonal orientations of polarized light and is negative when calculated from the refractive index profile determined with the other orientation, and for each other symmetry axis of the novel optical fiber .eta. is positive for both orientations of plane polarized light. Preferably the absolute values for .eta. when positive and .eta. when negative are about equal for said one symmetry axis. A preferred PZ fiber can be formed by depositing siliceous layers onto the interior surface of a hollow substrate tube of quartz to provide a preform. After forming two parallel flat faces in its outer surface, the preform is pulled to form a PZ fiber having an ellipitcal stress-applying region.

    Optical fiber connector
    10.
    发明授权
    Optical fiber connector 失效
    光纤连接器

    公开(公告)号:US4588256A

    公开(公告)日:1986-05-13

    申请号:US724804

    申请日:1985-04-19

    IPC分类号: G02B6/38

    摘要: A connector for an optical fiber cable is disclosed wherein strain relief features are provided for minimizing strain applied either to the external jacket of the cable or to the fiber such as during connecting operations is prevented from being coupled to the optical fiber. The connector thus includes strain relief members for securely anchoring the outer jacket of the cable and for anchoring strain relief fibers contained within the cable. Also, a resilient member is provided for allowing limited rearward movement of a member within which the optical fiber is anchored such as may occur during connection.

    摘要翻译: 公开了一种用于光纤电缆的连接器,其中提供了应力消除特征,用于最小化施加到电缆的外部护套或光纤的应变,例如在连接操作期间防止耦合到光纤。 连接器因此包括应变消除构件,用于牢固地锚固电缆的外护套并且用于锚定包含在电缆内的应变消除纤维。 此外,提供弹性构件,用于允许在连接期间可能发生光纤固定的构件的有限向后运动。