公开(公告)号：US20020088642A1

公开(公告)日：2002-07-11

申请号：US09925528

申请日：2001-08-10

Applicant: Pirelli Cavi E Sistemi S.p.A.

Inventor： Luigi Caimi

IPC: H01B007/00

CPC classification number: H01B3/441 ,  H01B3/002 ,  H01B7/282 ,  H01B7/295 ,  Y10T29/49117

Abstract: The disclsoure describes an electric conductor having a coating layer with the property of strippability so that it can be stripped from the electric conductor, and a method for controlling the strippability of the coating layer from the electric conductor, with the electrical insulation properties of the cable coating being kept constant after exposure to moisture. The method involves adding to a polymeric composition forming the coating layer a predetermined amount of a polyolefinic compound, which contains at least one unsaturation and at least one carboxyl group in the polymer chain.

Abstract translation: 该实施例描述了具有具有剥离性的涂层的电导体，使得其可以从导电体剥离，以及用于从电导体控制涂层的剥离性的方法，其中电缆的电绝缘性能 涂层在暴露于水分后保持恒定。 该方法包括向形成涂层的聚合物组合物中加入预定量的在聚合物链中含有至少一个不饱和键和至少一个羧基的聚烯烃化合物。

公开(公告)号：US20020105727A1

公开(公告)日：2002-08-08

申请号：US10109639

申请日：2002-04-01

Applicant: Pirelli Cavi E Sistemi S.p.A.

Inventor： Richard Ian Laming ,  Martin Cole

IPC: G02B005/18

CPC classification number: G02B6/02152 ,  G02B6/02138 ,  Y10S359/90

Abstract: A light transmitting device comprising or incorporating a broadband Bragg grating that is formed in the direction of light propagation with grating regions of alternatingly high and low refractive index. The grating regions are formed with periodicity P and are structured as to amplitude, periodicity and/or phase in a manner which varies periodically with a modulation period L>P. Also, either one or the other or both of the grating period P and the modulation period L is or are chirped over substantially the full extent of the grating. The grating exhibits a spectral response in which broad rcflection peaks appear at each side of a reflection peak centred on the Bragg wavelength and fall under an envelope determined by the Fourier transform of the periodic modulation function.

Abstract translation: 一种光发射装置，包括或并入宽带布拉格光栅，其在光传播方向上以交替高和低折射率的光栅区域形成。 光栅区域以周期性P形成，并且以调制周期L> P周期性地变化的方式构成振幅，周期和/或相位。 此外，光栅周期P和调制周期L中的一个或另一个或两者在光栅的基本上全部范围内被啁啾。 光栅表现出光谱响应，其中在以布拉格波长为中心的反射峰的每一侧出现宽的反射峰，并且落在由周期调制函数的傅里叶变换确定的包络下。

公开(公告)号：US20010046343A1

公开(公告)日：2001-11-29

申请号：US09878414

申请日：2001-06-12

Applicant: Pirelli Cavi E SISTEMI S.p.A.

Inventor： Carlo Carmannini

IPC: B29D011/00 ,  G02B006/12

CPC classification number: G02B6/1342 ,  G02B2006/12176 ,  G02F1/125

Abstract: The invention relates to a method of manufacturing an indiffused optical waveguide (6) in a substrate (1). A metal layer (7) and photoresist (8) are deposited on a substrate (1) in this order. Portions of the photoresist (8) are removed such that a photoresist structure (8) corresponding to the desired waveguide structure is left. The exposed portions of the metal layer (7) are removed by a chemical/physical etching technique whereafter the remaining photoresist (8) is removed and the remaining metal layer (7) is diffused into the substrate (1) by a heat treatment. The usage of a chemical/physical etching method for removing portions of the metal layer (7) results in smaller variations in the width of the waveguide after indiffusion. Such waveguides are particularly advantageous when being used in connection with acousto-optical devices. The optical waveguides according to the invention are also useable with other integrated optics devices.

Abstract translation: 本发明涉及一种制造衬底（1）中的扩散光波导（6）的方法。 依次将金属层（7）和光致抗蚀剂（8）沉积在基板（1）上。 去除光致抗蚀剂（8）的部分，使得留下对应于期望的波导结构的光致抗蚀剂结构（8）。 通过化学/物理蚀刻技术去除金属层（7）的暴露部分，然后除去剩余的光致抗蚀剂（8），并通过热处理将剩余的金属层（7）扩散到基板（1）中。 使用用于去除金属层（7）的部分的化学/物理蚀刻方法导致在扩散之后波导宽度的变化较小。 当与声光器件结合使用时，这种波导是特别有利的。 根据本发明的光波导也可以与其它集成光学器件一起使用。

公开(公告)号：US20040190911A1

公开(公告)日：2004-09-30

申请号：US10822029

申请日：2004-04-08

Applicant: Pirelli Cavi E Sistemi S.P.A. ,  Cisco Photonics Italy S.r.L.

Inventor： Pierluigi Franco ,  Giorgio Grasso ,  Matjaz Vidmar

IPC: H04B010/04

CPC classification number: H04B10/505 ,  H04B10/25077 ,  H04B10/5051 ,  H04B10/508

Abstract: Soliton or soliton-like optical pulses with characteristics adapted to propagation in an optical line for RZ type transmission are generated by modulating a continuous optical signal (1) by means of a modulator (2) which is substantially devoid of chirping, in which the modulator drive signal comprises at least one frequency (4) and one harmonic (5) thereof superimposed on each other (7). A high-speed optical transmission system is rendered independent of the type of transmitter or of signals sent to it if it comprises an adaptation unit (32) receiving the original optical pulses (30) and capable of generating corresponding pulsed signals (63) of RZ type.

Abstract translation: 通过利用基本上没有啁啾的调制器（2）调制连续的光信号（1）来产生具有适于在用于RZ型传输的光线路中传播的特性的孤子或孤子样光脉冲，其中调制器 驱动信号包括彼此重叠的至少一个频率（4）和一个谐波（5）（7）。 如果高速光传输系统包括接收原始光脉冲（30）并能够产生RZ的对应脉冲信号（63）的适配单元（32），则高速光传输系统被独立于发射机的类型或发送给它的信号， 类型。

公开(公告)号：US20030164246A1

公开(公告)日：2003-09-04

申请号：US10365495

申请日：2003-02-13

Applicant: Pirelli Cavi E Sistemi S.p.A.

Inventor： Marco Nassi ,  Pierluigi Ladie'

IPC: H01B012/00

CPC classification number: H01B12/02 ,  H01B12/06 ,  H01B12/16 ,  Y02E40/641 ,  Y02E40/642 ,  Y02E40/647 ,  Y10S505/704 ,  Y10S505/884 ,  Y10S505/887 ,  Y10T29/49014

Abstract: Superconducting cable (1) comprising: a) a layer (20) of tapes comprising superconducting material, b) a tubular element (6) for supporting said layer (20) of tapes comprising superconducting material, c) a cooling circuit, adapted to cool the superconducting material to a working temperature not higher than its critical temperature, characterized in that said tubular element (6) is composite and comprises a predetermined amount of a first material having a first thermal expansion coefficient and a second material having a thermal expansion coefficient higher than that of said first material, said thermal expansion coefficients and said amounts of said first and second material being predetermined in such a way that said tubular element has an overall thermal shrinkage between the room temperature and said working temperature of the cable such as to cause a deformation of said tapes comprising superconducting material lower than the critical deformation of the same tapes.

公开(公告)号：US20020104678A1

公开(公告)日：2002-08-08

申请号：US09971766

申请日：2001-10-09

Applicant: PIRELLI CAVI E SISTEMI S.p.A.

Inventor： Sergio Belli ,  Luigi Caimi ,  Claudio Bosisio ,  Alberto Bareggi ,  Luca Balconi ,  Giovanni Pozzati

IPC: H01B007/00

CPC classification number: H01B3/441 ,  H01B7/28 ,  Y02A30/14

Abstract: A cable, in particular a cable for electric power transmission or distribution, having an inner layer comprising a self-repairing material with a predetermined cohesiveness and a controlled flowability, so as to re-establish, upon creation of a discontinuity in at least one of the cable coating layers, the continuity in the coating. The discontinuity in the coating can be caused by mechanical abuses of various types, for example accidental impact with cutting tools. Infiltration of moisture and generation of leakage currents, leading to a rapid corrosion of the conductor, are in this way avoided.

公开(公告)号：US20040166190A1

公开(公告)日：2004-08-26

申请号：US10787209

申请日：2004-02-27

Applicant: Pirelli Cavi E Sistemi S.P.A.

Inventor： Sergio Belli ,  Angelo Giuseppe Locatelli ,  Giovanni Pozzati ,  Paolo Veggetti

IPC: B29C047/06 ,  B29C047/88

CPC classification number: B29C47/8815 ,  B29C47/0016 ,  B29C47/02 ,  B29C47/686 ,  B29K2105/16 ,  B29K2995/0016 ,  B29L2031/3462

Abstract: The present invention concerns a process for producting cables, in particular cables for the distribution of electrical energy or cables for telecommunications, more particularly, cables having at least one covering layer comprising a composition of high viscosity. More particularly, the present invention concerns cables having at least one covering layer comprising a polymeric composition comprising a mineral filler capable of imparting one or more specific properties to the aforesaid cables. In accordance with the present invention, said production process comprises the stages of: conveying at least one conducting element inside of an extruder; feeding the polymeric material, optionally premixed with other components of said composition, into said extruder, filtering the material transferred and plasticized by the screw of said extruder; depositing said material onto said at least one conducting element, the filtration operation being performed with a filtration efficiency greater than 0.8, preferably greater than 0.9. The present invention concerns, in addition, an apparatus for the purpose of performing the production process mentioned above.

Abstract translation: 本发明涉及用于生产电缆的方法，特别是用于分配用于电信的电能或电缆的电缆，更具体地，涉及具有至少一个包含高粘度组合物的覆盖层的电缆。 更具体地说，本发明涉及具有至少一个覆盖层的电缆，该覆盖层包括聚合物组合物，该聚合物组合物包含能够赋予上述电缆一个或多个特定性能的矿物填料。 根据本发明，所述制造方法包括以下步骤：在挤出机内输送至少一个导电元件; 将可选地与所述组合物的其它组分预混合的聚合物材料进料到所述挤出机中，过滤由所述挤出机的螺杆转移和增塑的材料; 将所述材料沉积到所述至少一个导电元件上，所述过滤操作以大于0.8，优选大于0.9的过滤效率进行。 本发明另外涉及用于进行上述制造方法的装置。

公开(公告)号：US20030128948A1

公开(公告)日：2003-07-10

申请号：US10342882

申请日：2003-01-14

Applicant: PIRELLI CAVI E SISTEMI S.P.A.

Inventor： Bartolomeo Italo Tirloni ,  Francesco Gabriele Sartori ,  Davide Sarchi ,  Giacomo Stefano Roba

IPC: G02B006/22

CPC classification number: G02B6/03644 ,  G02B6/02009 ,  G02B6/02219 ,  G02B6/03694

Abstract: An optical transmission fiber has a refractive index profile with an area of increased index of refraction at the inner core of the fiber, an annular region positioned radially outward from the inner core with an index of refraction exceeding the index of the inner core, and at least a low dopant content region in a cross-sectional region between the inner core and the annular region. A low loss cladding layer surrounds the core region. The optical transmission fiber with this segmented core profile provides a high effective area, low non-linearity coefficient, nonzero dispersion, and relatively flat dispersion slope.