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    • 1. 发明申请
    • FIRE RESISTANT CABLE
    • 耐火电缆
    • WO2003094176A1
    • 2003-11-13
    • PCT/EP2002/004728
    • 2002-04-29
    • PIRELLI S.P.A.PINACCI, Paola, LucianaPERUZZOTTI, FrancoTIRELLI, Diego
    • PINACCI, Paola, LucianaPERUZZOTTI, FrancoTIRELLI, Diego
    • H01B7/00
    • C08K3/40H01B7/295
    • Cable comprising at least one conductor and at least a fire resistant coating layer including a composition comprising: (a) at least an organic polymer having a combustion temperature range comprised between a minimum value T1 and a maximum value T2; (b) at least a glass frit; (c) at least an inert compound; wherein: - said inert compound (c) has a softening point or a melting temperature of not less than 1000°C; - said glass frit (b) reaches a viscosity of between 10 7 poise and 10 8 poise in a selected temperature range including the combustion temperature range of said organic polymer (a), said selected temperature range being such that said glass frit (b) flows over said inert compound (c) and the burned organic polymer (a) so as to form a solid char fire resistant coating layer.
    • 电缆包括至少一个导体和至少一个防火涂层,其包括组合物,所述组合物包含:(a)至少一种有机聚合物,其燃烧温度范围包括在最小值T1和最大值T2之间; (b)至少一块玻璃料; (c)至少一种惰性化合物; 其中: - 所述惰性化合物(c)的软化点或熔点不低于1000℃; - 所述玻璃料(b)在包括所述有机聚合物(a)的燃烧温度范围的选定温度范围内达到10 -7泊和10 8泊的粘度,所述选定的温度范围使得所述玻璃 玻璃料(b)流过所述惰性化合物(c)和燃烧的有机聚合物(a),以形成固体耐火涂层。
    • 3. 发明申请
    • METHOD FOR GUIDING AN ELECTROMAGNETIC RADIATION, IN PARTICULAR IN AN INTEGRATED OPTICAL DEVICE
    • 用于引导电磁辐射的方法,特别是集成光学器件
    • WO2003075055A1
    • 2003-09-12
    • PCT/EP2002/002466
    • 2002-03-06
    • PIRELLI S.P.A.ROMAGNOLI, MarcoTORMEN, MaurizioBONATI, Camilla
    • ROMAGNOLI, MarcoTORMEN, MaurizioBONATI, Camilla
    • G02B6/12
    • B82Y20/00G02B6/1225G02B6/125
    • A method for guiding electromagnetic radiation, comprises providing a photonic crystal (1) made of a bulk material with a predetermined refractive index and having a periodic array of holes (2) with predetermined radius, and feeding to that region an electromagnetic radiation having a wavelength in the fundamental photonic band and so related to the refractive index of the bulk material, to the radius of the holes and to the period of the array that, starting from a isotropic distribution of the wave vectors within a first angular range that is twice the angular extension of the first Irreducible Brillouin zone of said photonic crystal, the corresponding group velocity vectors are rearranged as concerns direction and module so that at least 50 % of them become directed within a second angular range that is about one-third of the first angular range and the width at half-maximum of the distribution of the modules of the vectors is lower than about two-third of the second angular range.
    • 一种用于引导电磁辐射的方法,包括提供由具有预定折射率的本体材料制成的具有预定半径的周期性阵列的孔(2)的光子晶体(1),并向该区域馈送具有波长的电磁辐射 在基本光子带中,因此与体材料的折射率相关,到孔的半径和阵列的周期,其从波矢的各向同性分布开始,在第一角度范围内是两倍的 所述光子晶体的第一不可约束布里渊区域的角度延伸,相应的组速度矢量被重新排列成关于方向和模块,使得它们中的至少50%变为在第一角度范围内的约三分之一的第二角度范围内 范围,并且矢量的模块的分布的半值的宽度低于第二角度范围的约三分之二。
    • 5. 发明申请
    • ON-LINE TENSION MEASUREMENT IN AN OPTICAL FIBRE
    • 光纤中的在线张力测量
    • WO2003056288A1
    • 2003-07-10
    • PCT/EP2001/015331
    • 2001-12-27
    • PIRELLI S.P.A.MARTINELLI, Paolo
    • G01L5/10
    • G01M11/37C03B37/0253C03B2205/40G01L1/242G01L5/105
    • The invention relates to a process of contactless monitoring the tension in an optical fibre and to a tension meter which enables contactless measurement of the tension in a bare and in a coated optical fibre. By measuring the retardation induced by the birefringence of an optical fibre by means of a polarised light beam incident onto the fibre at an angle between about 10 ° and 25 ° to the detection optical axis it is possible to accurately measure tensions over a wide range, i.e., from less than about 10 g to about 450 g included. The method enables monitoring the tension during the ramp-up of the drawing process and is particularly advantageous for the control of the drawing tension in manufacturing of NZD, multimode or special fibres. Furthermore, the method allows to achieve an accurate monitoring of the tension both on a bare and on a coated fibre.
    • 本发明涉及一种非接触式监测光纤中的张力和张力计的方法,该张力计使得能够对裸机和被覆光纤中的张力进行非接触式测量。 通过以与检测光轴成约10°至25°的角度入射到光纤上的偏振光束测量由光纤的双折射引起的延迟,可以在宽范围内精确地测量张力, 即包括小于约10g至约450g。 该方法能够在拉拔过程中监测张力,并且对于控制NZD,多模或特殊纤维制造过程中的拉伸张力特别有利。 此外,该方法允许在裸光纤和涂覆光纤上实现对张力的精确监测。
    • 9. 发明申请
    • PROCESS FOR MANUFACTURING A MICRO-STRUCTURED OPTICAL FIBRE
    • 制造微结构光纤的工艺
    • WO2003086738A1
    • 2003-10-23
    • PCT/EP2002/004203
    • 2002-04-16
    • PIRELLI S.P.A.ARIMONDI, MarcoMACCHETTA, AndreaASNAGHI, DanielaCASTALDO, Anna
    • ARIMONDI, MarcoMACCHETTA, AndreaASNAGHI, DanielaCASTALDO, Anna
    • B29D11/00
    • G02B6/02033B29C55/00B29C61/003B29C71/02B29C2071/022B29D11/00721G02B6/02314G02B6/02328G02B6/02333G02B6/02338G02B6/02347G02B6/02385
    • Forming an intermediate polymer preform of elongated shape for manufacturing a microstructured optical fibre can comprise: making a mould with a tubular par (21) containing a pattern of hole generating elements (23) (wires, rods or tubes) extending along it, the hole generating elements being releasably attached to an upper (25) and to a lower (22) base of the mould; cleaning the mould by circulating a filtered solvent in it; filling the mould with a fluid polymer optical material or polymer precursor; consolidating the polymer material or precursor so that it cannot change its shape under operating stress conditions at ambient temperature: releasing the hole generating elements from the upper and lower base; extracting the consolidated core preform from the mould and, if required, extracting the hole-generating elements from the core preform (40), in order to create the microstructure. The process can further include calibrating the intermediate preform, wherein calibrating comprises: stretching the intermediate preform during a stretching period by heating it (51) at a predetermined stretching temperature avove T g and applying a tensional load (F) to the intermediate preform (50) along its elongation axis, so as to cause its straining along the elongation axis, the stetching temperature, the tensional laod and the stretching period being selected so as to impress a viscoelastic deformation to the intermediate preform; cooling the intermediate preform to a temperature below T g during a cooling period, while maintaining the stretched preform in tension, so as to avoid a substantial release of said viscoelastic deformation; inserting the intermediate preform in a calibration tube (53) having a cylindrical inner shape; and heating (52) the intermediate polymer preform to a calibration temperature above T g during a calibration period sufficient to achieve a substantial release of said viscoelastic deformation.
    • 形成用于制造微结构光纤的细长形状的中间聚合物预成型件可以包括:制造具有管状(21)的模具,其包含沿其延伸的孔产生元件(23)(电线,棒或管)的图案,孔 产生元件可释放地附接到模具的上部(25)和下部(22)底部; 通过在其中循环过滤的溶剂来清洁模具; 用流体聚合物光学材料或聚合物前体填充模具; 固化聚合物材料或前体,使得它不能在环境温度下的操作应力条件下改变其形状:从上下基底释放孔产生元件; 从模具中提取固结的纤芯预成型件,并且如果需要,从芯预制件(40)中提取孔产生元件,以便产生微结构。 该方法还可以包括校准中间预制件,其中校准包括:在拉伸期间通过在预定的拉伸温度去除Tg下加热它(51)并向中间预成型件(50)施加张力载荷(F)来拉伸中间预制件, 沿其伸长轴线使其沿着伸长轴线的拉伸,选择拉伸温度,拉伸拉伸和拉伸周期,以对中间预制件施加粘弹性变形; 在冷却期间将中间预制件冷却至Tg以下,同时保持拉伸的预制件处于张力状态,以避免实质上释放所述粘弹性变形; 将中间预制件插入具有圆柱形内部形状的校准管(53)中; 以及在足以实现所述粘弹性变形的实质释放的校准周期期间将中间聚合物预制件加热(52)至高于Tg的校准温度。
    • 10. 发明申请
    • OPTICAL TRANSMISSION SYSTEM USING AN OPTICAL PHASE CONJUGATION DEVICE
    • 光学传输系统使用光学相位调制装置
    • WO2003081815A1
    • 2003-10-02
    • PCT/EP2002/003251
    • 2002-03-22
    • PIRELLI S.P.A.ALBERTI, FrancescoMINZIONI, PaoloSCHIFFINI, Alessandro
    • ALBERTI, FrancescoMINZIONI, PaoloSCHIFFINI, Alessandro
    • H04B10/18
    • H04B10/2531
    • An optical system (10) comprises an optical fiber path (12) suitable for propagating an optical signal at least in a first direction, and a plurality M of optical amplifiers (13 1 ... 13 6 ), disposed along said optical fiber path (12), so as to divide said optical fiber path in N spans of optical fiber (14 1 ... 14 5 ). The spans of optical fiber have all substantially a length L amp and comprise at least one transmission optical fiber having an effective length L eff. An optical phase conjugation device (15) is associated to one of the amplifiers of said plurality of amplifiers, and is disposed in combination with a dispersion compensator (16). The compensator (16) is disposed upstream from the amplifier associated to the optical phase conjugated device (15), and is adapted for introducing an accumulated dispersion such as to substantially compensate the dispersion accumulated in a portion having a length (L amp - L eff of the span immediately upstream from the amplifier associated to said optical phase conjugation device (15).
    • 光学系统(10)包括适于至少沿第一方向传播光信号的光纤路径(12)和多个M个光放大器(13 1 ... 13 6),沿着 所述光纤路径(12),以便将所述光纤路径划分成N个跨越光纤(14 1〜14 5)。 光纤的跨度具有基本上长度的灯,并且包括具有有效长度Leff的至少一个透射光纤。 光学相位共轭装置(15)与所述多个放大器中的一个放大器相关联,并与色散补偿器(16)组合设置。 补偿器(16)设置在与光学相位共轭器件(15)相关联的放大器的上游,并且适于引入累积的色散,以便基本上补偿累积在具有长度的部分(Lamp-Leff 跨越从与所述光学相位共轭装置(15)相关联的放大器的上游。