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404 条记录 (耗时 0.015 秒)

    Optical fibre cables
    51.
    发明公开
    Optical fibre cables 失效
    选择Kabel。

    公开(公告)号：EP0250173A2

    公开(公告)日：1987-12-23

    申请号：EP87305216.1

    申请日：1987-06-12

    申请人： STC Submarine Systems Limited

    发明人： Worthington, Peter ,  Russell, John Nigel

    IPC分类号： G02B6/44

    CPC分类号： G02B6/4434 ,  G02B6/4427 ,  G02B6/449

    摘要： A method of making very long length e.g. 50km of optical fibre submarine cable in which acrylate-coated fibres (5) are guided by a fixed lay plate (l0) and embedded by a fixed trumpet shaped die (7) in a relatively soft thermoplastic polymer coating (3) (e.g. Hytrel-RTM) with a zero lay angle. The coating (3) is heat softened and carried on a kingwire (2). The partially-embedded fibres are encased in a second coating (l2) of the polymer by conventional extrusion. The element is coated with a water blocking material as the element is encased in a tubular strength member comprising a conductive tube of copper or aluminium surrounded by two layers of high tensile strength wires. A dielectric sheath of e.g. natural polyethelene is extruded over the wires. The structure of the cable limits the bending of the fibres to e.g. 0.6m, so that very low losses can be achieved.

    摘要翻译： 一种制造非常长的长度的方法 50公里的光纤海缆，其中丙烯酸酯涂覆的纤维（5）由固定的铺板（10）引导并由固定的喇叭形模具（7）包围在相对软的热塑性聚合物涂层（3）中（例如Hytrel- RTM），零位角。 涂层（3）被热软化并承载在金线（2）上。 通过常规挤出将部分嵌入的纤维包封在聚合物的第二涂层（12）中。 该元件涂覆有阻水材料，因为该元件被包裹在包含由两层高拉伸强度线包围的铜或铝的导电管的管状强度构件中。 电介质护套。 天然聚乙烯被挤出在电线上。 电缆的结构限制了纤维的弯曲。 0.6m，可以实现非常低的损耗。

    Optical transmission package
    52.
    发明公开
    Optical transmission package 失效
    OptischerÜbertragungsbausatz。

    公开(公告)号：EP0243057A1

    公开(公告)日：1987-10-28

    申请号：EP87303190.0

    申请日：1987-04-13

    申请人： STC PLC

    发明人： Turner, Andrew Stephen

    IPC分类号： G02B6/42

    CPC分类号： G02B6/4248 ,  G02B6/4202 ,  G02B6/4224 ,  G02B6/4238

    摘要： In an injection laser package having a housing (30) an optical fibre pigtail (36) extends onto a sub-mount (2A) of a mount (1), the sub-mount (2A) being formed of a plurality of thick film layers which incorporate a resistance heating element (5) and etched conductors (4A, 4B) insulated (6) from a narrow solder pad (7). With the end portion (36A) of the fibre in alignment with the injection laser chip (33) a current is applied to the conductors (4A, 4B) to heat the sub-mount and melt the solder pad (7) to thereby hold the fibre exactly in alignment with the chip (33).
    The portion (36B) of the fibre extending between the sub-mount and the inner end of the entrance support tube (35) remains unsupported and thereby flexible so that external stresses on the package housing and, particularly, the tube (35) do not transfer any strain to the end portion (36A) of the fibre so that alignment with the injection laser chip (33) is maintained

    摘要翻译： 在具有壳体（30）的注射激光器封装中，光纤引线（36）延伸到安装件（1）的子安装座（2A）上，子安装件（2A）由多个厚膜层 其包括电阻加热元件（5）和与窄焊盘（7）绝缘（6）的蚀刻导体（4A，4B）。 通过使光纤的端部（36A）与注入激光器芯片（33）对齐，向导体（4A，4B）施加电流以加热该子安装座并熔化焊盘（7），从而保持 光纤与芯片（33）精确对准。 在子安装座和入口支撑管（35）的内端之间延伸的纤维的部分（36B）保持不受支撑，从而柔性，使得包装壳体，特别是管（35）上的外部应力不会 将任何应变传递到光纤的端部（36A），从而保持与注射激光器芯片（33）的对准

    Digital navstar receiver
    58.
    发明公开
    Digital navstar receiver 失效
    数字NAVSTAR接收器。

    公开(公告)号：EP0155776A1

    公开(公告)日：1985-09-25

    申请号：EP85301261.5

    申请日：1985-02-25

    申请人： STC PLC

    发明人： Wong, Andrew Chi-Chung ,  Fearnhead, Graham Roy ,  Gale, Simon John

    IPC分类号： G01S5/14 ,  G01S11/00

    CPC分类号： G01S19/29

    摘要： A NAVSTAR receiver in which the received signals are processed to produce digitised quadrature signals (l,Q) at zero i.f. Baseband phasor rotation to effect Doppler tracking in the receiver loop is accomplished by deriving digital signals representing sin wT and cos wT for the required rotation angle wT, multiplying the quadrature signals separately and summing the outputs according to the algorithm I' = I cos ωT + Q sin ωT and Q 1 = Q cos ωT - | sin ωT, where |& Q are the digitised quadrature signals.