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    COMMUNICATIONS CABLE, METHOD AND PLANT FOR MANUFACTURING THE SAME
    1.
    发明公开
    COMMUNICATIONS CABLE, METHOD AND PLANT FOR MANUFACTURING THE SAME 有权
    新闻有线和系统这样的电缆生产

    公开(公告)号：EP1364376A2

    公开(公告)日：2003-11-26

    申请号：EP02708331.0

    申请日：2002-02-26

    Applicant: PIRELLI S.p.A.

    Inventor： BRANDI, Giovanni ,  DE RAI, Luca, Giorgio, Maria

    IPC: H01B11/04 ,  H01B13/02 ,  H01B13/14

    CPC classification number: H01B11/04 ,  H01B13/0292

    Abstract: A method, an extrusion apparatus (11, 111) and a plant (6) for continuously manufacturing a communication cable (1, 101, 201, 301) are described, wherein a plurality of twisted pairs (49) of insulated conductors (50) are housed in respective cavities (53) longitudinally formed within an elongated integral body (2). The cavities (53) have a substantially circular cross-section and a maximum diameter (Dmax) adapted to prevent any relative movement of the twisted pairs (49) of insulated conductors (50) with respect to one another, while each of said pairs (49) of insulated conductors (50) is substantially free to move within said cavities (53) along the longitudinal direction (X-X) of the cable (1, 201, 301). Advantageously, the communications cable (1, 101, 201, 301) of the invention has both the desired electrical characteristics, such as a reduced cross-talk and good electrical stability, and mechanical characteristics which enable the cable (1, 101, 201, 301) to be easily manufactured, handled and installed.

    SUBMARINE OPTICAL CABLE WITH WATER-BLOCKING FILLING COMPOSITION
    2.
    发明公开
    SUBMARINE OPTICAL CABLE WITH WATER-BLOCKING FILLING COMPOSITION 审中-公开
    海底光缆与水封填充组合物

    公开(公告)号：EP1346246A1

    公开(公告)日：2003-09-24

    申请号：EP01990597.5

    申请日：2001-12-14

    Applicant: PIRELLI S.p.A.

    Inventor： BOSISIO, Claudio ,  PAVAN, Massimiliano ,  MARITANO, Mauro

    IPC: G02B6/44

    CPC classification number: G02B6/4494 ,  G02B6/4427

    Abstract: Optical cable, in particular for submarine connections, comprising a water blocking resin filling composition of reduced hardness disposed into interstices (105). Preferably, said resin composition is a polyurethane resin comprising less than about 35 % by weight of a polyol/polyisocyanate mixture and from about 60 % to about 90 % by weight of a mineral oil. Said polyurethane resin preferably further comprises less than about 12 % by weight of a coupling agent. The cable comprises an optical core (100) surrounded by plurality of metallic wires (106), an outer polymeric sheath (108), the optical core (100) of the 'tight' type, wherein a plurality of optical fibers (103) is embedded into a polymeric matrix (102) disposed around a strength member (101).

    Abstract translation: 光缆，尤其是用于海底连接的光缆，其包括置于间隙（105）中的硬度降低的阻水树脂填充组合物。 优选地，所述树脂组合物是包含小于约35重量％的多元醇/多异氰酸酯混合物和约60重量％至约90重量％的矿物油的聚氨酯树脂。 所述聚氨酯树脂优选还包含小于约12重量％的偶联剂。 该电缆包括由多个金属线（106）围绕的光学芯（100），外部聚合物护套（108），“紧密”型光学芯（100），其中多根光纤（103） 嵌入围绕加强件（101）设置的聚合物基质（102）中。

    OPTICAL FIBRE FILTER
    5.
    发明公开
    OPTICAL FIBRE FILTER 有权
    光纤FILTER

    公开(公告)号：EP1330668A1

    公开(公告)日：2003-07-30

    申请号：EP01992905.8

    申请日：2001-10-23

    Applicant: PIRELLI S.p.A.

    Inventor： VAVASSORI, Paolo ,  IOMMI, Alessandro

    IPC: G02B6/22 ,  G02B6/14

    CPC classification number: G02B6/02047 ,  G02B6/02052 ,  G02B6/2552 ,  G02B6/29352 ,  G02B6/2938

    Abstract: An optical fibre filter (1, 1') comprises a dual-mode optical fibre (2) which includes a core (3) and a cladding (4) and through which an optical signal can pass; a pair of coupling regions (8, 9) formed in the optical fibre (2) at a predefined mutual distance (L) so as to produce a power transfer between a first and a second propagation modes (LP01, LP11) of the optical signal; and a phase shift region (10) defined by a section of the fibre (2) lying between the coupling regions (10) defined by a section of the fibre (2) lying between the coupling regions (8, 9), for producing a phase shift between the first and second propagation modes (LP01, LP11); in which, in the coupling regions (8, 9), the optical fibre (2) has, in cross section, an asymmetrical refractive index profile.

    ACOUSTO-OPTIC DEVICES HAVING AN ACOUSTIC ATTENUATOR STRUCTURE
    8.
    发明公开
    ACOUSTO-OPTIC DEVICES HAVING AN ACOUSTIC ATTENUATOR STRUCTURE 失效
    具有声学衰减器结构的声光器件

    公开(公告)号：EP1000381A1

    公开(公告)日：2000-05-17

    申请号：EP98939611.4

    申请日：1998-07-03

    Applicant: Società Pneumatici Pirelli S.p.A.

    Inventor： SCHMID, Steffen

    IPC: G02F1/125

    CPC classification number: G02F1/125

    Abstract: Disclosed is an acousto-optic device having a number of acoustic attenuating structures and a method to limit the parasitic effects of a surface acoustic wave. The structures include any combination of the following: surrounding the acousto-optic conversion region with acoustic absorber, placing acoustic absorber near to the transducer(s), placing a strip of acoustic absorber between optical waveguides formed in the device, shaping one or more ends of acoustic waveguides formed in the device to absorb energy from the transducer(s), and/or extending the acoustic waveguides to further limit irradiation of unguided acoustic waves.

    Abstract translation: 公开了具有多个声衰减结构的声光器件以及限制表面声波的寄生效应的方法。 所述结构包括以下各项的任意组合：用声学吸收器围绕声光转换区域，将吸声器放置在换能器附近，将吸声板条放置在设备中形成的光波导之间，将一个或多个端部 在装置中形成的声波导管，以从换能器吸收能量，和/或延伸声波导管以进一步限制非导向声波的辐射。

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