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公开(公告)号：US06715323B1
公开(公告)日：2004-04-06
申请号：US09573702
申请日：2000-05-19
申请人： Giacomo Stefano Roba , Roberto Pata
发明人： Giacomo Stefano Roba , Roberto Pata
IPC分类号： C03B37023
CPC分类号： C03B37/02718 , C03B2205/55
摘要： The present invention relates to a method and apparatus for cooling an optical fiber during the drawing process of said fiber. In particular the present method for cooling an optical fiber comprises flowing a cooling gas onto the optical fiber wherein the flow direction of the cooling gas is substantially transversal with respect the longitudinal axis of the fiber. It has been found that by employing a flow of cooling gas being substantially transversal to the longitudinal axis of the drawn fiber, the cooling efficiency of the fiber may be substantially improved. The apparatus according to the invention comprises a hollow elongated body, said hollow elongated body having at least one wall defining an internal elongated space through which the drawn fiber passes wherein the at least one wall of said hollow elongated body is provided with at least one longitudinal opening through which a cooling gas is introduced into the hollow body and at least one longitudinal opening through which said cooling gas is removed from said hollow body.
摘要翻译： 本发明涉及一种用于在所述光纤的拉丝过程中冷却光纤的方法和装置。特别地，本发明的用于冷却光纤的方法包括将冷却气体流到光纤上，其中冷却气体的流动方向为 相对于纤维的纵轴基本上是横向的。已经发现，通过采用基本上横贯拉伸纤维的纵向轴线的冷却气体流，可以显着改善纤维的冷却效率。根据 本发明包括中空细长体，所述中空细长体具有限定内部细长空间的至少一个壁，所述拉伸纤维通过该细长空间，其中所述中空细长体的至少一个壁设置有至少一个纵向开口，通过该纵向开口 冷却气体被引入中空体和至少一个纵向开口 从所述中空体中除去冷却气体。
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公开(公告)号：US06633713B2
公开(公告)日：2003-10-14
申请号：US09880766
申请日：2001-06-15
IPC分类号： G02B602
CPC分类号： G02B6/03644 , G02B6/02014 , G02B6/02257 , G02B6/02271 , G02B6/03611 , G02B6/03622 , G02B6/29377 , H04B10/25253
摘要： An apparatus and method for transmitting an optical signal. The invention is directed to a transmission line having first (16) and second (18) spans of single mode fiber. The fiber of the first span has a negative dispersion with an absolute value of between about 2.5 ps/nm/km and 10 ps/nm/km at the operating wavelength. The second span (18) is connected to the first span (16) and has a positive dispersion at the operating wavelength. The positive dispersion of the second span compensates for the negative dispersion of the first span such that the cumulative dispersion across the first and second spans is approximately zero. The increased dispersion of the first span coincides with characteristics to lower non-linear effects, permits a longer length of the second span, and helps lower attenuation in the transmission line.
摘要翻译： 一种用于发送光信号的装置和方法。 本发明涉及具有单模光纤的第一（
16 ）和第二（ 18 ）的传输线。 第一跨距的光纤在工作波长处具有绝对值在约2.5ps / nm / km和10ps / nm / km之间的负色散。 第二个跨度（ 18 ）连接到第一个跨度（ 16 ），并在工作波长处具有正色散 。 第二跨度的正色散补偿第一跨度的负色散，使得跨越第一和第二跨度的累积色散近似为零。 第一跨度的增加的色散与特性相一致，以降低非线性效应，允许第二跨度的更长的长度，并且有助于降低传输线中的衰减。 -
公开(公告)号：US06550282B2
公开(公告)日：2003-04-22
申请号：US09741882
申请日：2000-12-22
申请人： Giacomo Stefano Roba , Roberto Pata
发明人： Giacomo Stefano Roba , Roberto Pata
IPC分类号： C03B37022
CPC分类号： C03C25/12 , C03B37/032 , C03B2203/36 , C03B2205/06 , C03B2205/42 , C03C25/005
摘要： A method for manufacturing an optical fiber (100) having low PMD, comprises the steps of: a) heating at least one end portion (3a) of a preform (3); b) drawing an optical fiber (100) from a free end of said heated end portion (3a) along a fiber drawing axis (I—I); c) coating said optical fiber (100) with a suitable coating material; d) applying to said coated optical fiber (100) a torque about said fiber drawing axis (I—I), e) winding said coated optical fiber (100) onto a collecting spool (9). According to the invention, step d) is carried out by means of a pulley (16) supported upstream of said collecting spool (9) and rotated about the fiber drawing axis (I—I), said optical fiber (100) being wound up onto said pulley (16) for an angle of at least about 360°. Advantageously, such method also allows to notably increase the amount of optical fiber produced per unit of time with respect to the prior art.
摘要翻译： 一种制造具有低PMD的光纤（100）的方法，包括以下步骤：a）加热预成型件（3）的至少一个端部（3a）; b）从自由端拉出光纤（100） 的所述加热端部（3a）沿着拉丝轴线（II）; c）用合适的涂层材料涂覆所述光纤（100）; d）向所述涂覆的光纤（100）施加围绕所述光纤拉伸轴线 （II），e）将所述涂覆的光纤（100）卷绕到收集卷轴（9）上。 根据本发明，步骤d）通过支撑在所述收集线轴（9）上游并绕光纤拉丝轴线（II）旋转的滑轮（16）进行，所述光纤（100）被卷绕到所述 滑轮（16）至少约360°的角度。 有利地，这种方法还允许相对于现有技术显着增加每单位时间产生的光纤的量。
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24.发明授权公开(公告)号：US06371394B1
公开(公告)日：2002-04-16
申请号：US09470887
申请日：1999-12-22
申请人： Giacomo Stefano Roba
发明人： Giacomo Stefano Roba
IPC分类号： B65H5504
CPC分类号： C03B37/12 , B65H54/026 , B65H55/005 , B65H55/04 , B65H2701/31 , C03B37/032 , C03B2203/18 , C03B2203/36 , G02B6/4458 , Y10S242/92
摘要： Method for winding a fiber element onto a support. The fiber element having at least two longitudinal portions (Pi) with different characteristics. The method including the steps of supplying the fiber element to the support and associating with each longitudinal portion a respective value of the winding pitch (pi) which is different from the values associated with the portions adjacent thereto. The winding pitch associated with each portion being modulated in accordance with a periodic function.
摘要翻译： 将纤维元件卷绕到支撑体上的方法。 纤维元件具有至少两个具有不同特性的纵向部分（Pi）。 该方法包括以下步骤：将纤维元件供应到支撑件上，并且与每个纵向部分相关联的绕组间距（pi）的相应值与与其相邻的部分相关联的值不同。 与每个部分相关联的绕组音调根据周期函数进行调制。
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公开(公告)号：US06336347B1
公开(公告)日：2002-01-08
申请号：US09472145
申请日：1999-12-27
IPC分类号： C03B37018
CPC分类号： C03C3/06 , C03B19/1415 , C03B19/1423 , C03B37/01413 , C03B37/0142 , C03B2207/02 , C03B2207/22 , C03B2207/32 , C03B2207/36 , C03B2207/81 , C03B2207/86 , C03B2207/87
摘要： A process for producing a high-purity optical silica preform, comprising (a) vaporization of an organosilicon compound; (b) thermal decomposition of the said organosilicon compound in the vapor state, to give amorphous fused silica particles; (c) deposition of the said amorphous fused silica particles on a support, in which the said organosilicon compound has the formula (I) in which R1, R2, R3 and R4 have the meanings given in the text.
摘要翻译： 一种制备高纯度光学二氧化硅预制件的方法，包括（a）有机硅化合物的汽化; （b）在蒸气状态下热分解所述有机硅化合物，得到无定形熔融二氧化硅颗粒; （c）将所述无定形熔融二氧化硅颗粒沉积在载体上，其中所述有机硅化合物具有式（I），其中R 1，R 2，R 3和R 4具有本文给出的含义。
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26.发明申请Radiation curable coating composition for optical fiber with reduced attenuation loss 审中-公开具有降低衰减损耗的光纤可辐射固化涂料组合物公开(公告)号：US20090080851A1
公开(公告)日：2009-03-26
申请号：US12292134
申请日：2008-11-12
申请人： Sandra Joanna Nagelvoort , Johannes Adrianus Van Eekelen , Adrianus Gijsbertus Maria Abel , Gouke Dirk-Jan Geus , Duurt Pieter Willem Alkema , Giacomo Stefano Roba , Marco Arimondi , Lidia Terruzzi , Sabrina Fogliani
发明人： Sandra Joanna Nagelvoort , Johannes Adrianus Van Eekelen , Adrianus Gijsbertus Maria Abel , Gouke Dirk-Jan Geus , Duurt Pieter Willem Alkema , Giacomo Stefano Roba , Marco Arimondi , Lidia Terruzzi , Sabrina Fogliani
CPC分类号： G02B1/10 , C03C25/1065 , C08F290/06 , C09D4/06
摘要： The present invention relates to a radiation curable coating composition comprising a radiation curable oligomer comprising a backbone derived from polypropylene glycol and a dimer acid based polyester polyol, wherein said coating composition, when cured, is having: a) a hardening temperature (Th) of from −10° C. to about −20° C. and a modulus measured at said Th of lower than 5.0 MPa; or b) a hardening temperature (Th) of from −20° C. to about −30° C. and a modulus measured at said Th of lower than 20.0 MPa; or c) a hardening temperature (Th) of lower than about −30° C. and a modulus measured at said Th of lower than 70.0 MPa.
摘要翻译： 本发明涉及一种可辐射固化涂料组合物，其包含可聚合低聚物，其包含衍生自聚丙二醇的主链和二聚酸基聚酯多元醇，其中所述涂料组合物在固化时具有：a）硬化温度（Th） 从-10℃至约-20℃，并且在所述Th下测量的模量低于5.0MPa; 或b）-20℃至约-30℃的硬化温度（Th），并且在所述Th处测量的模量低于20.0MPa; 或c）低于约-30℃的硬化温度（Th）和在所述Th下测得的模量低于70.0MPa的模量。
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公开(公告)号：US06577800B2
公开(公告)日：2003-06-10
申请号：US09881109
申请日：2001-06-15
IPC分类号： G02B616
CPC分类号： G02B6/02014 , G02B6/02223 , G02B6/02238 , G02B6/02271 , G02B6/0285 , G02B6/03605 , G02B6/03611 , G02B6/03622 , G02B6/03644 , G02B6/29377
摘要： An optical transmission fiber for use in a metropolitan or access network is disclosed. The transmission line includes a fiber being single mode at a first operating wavelength of around 1310 nm and a second operating wavelength of around 1550 nm. The dispersion of the fiber is negative at one of the first and second wavelengths and positive at the other wavelength, with an absolute value of between about 5 and 15 ps/nm/km. The fiber also has a zero dispersion wavelength that is located between the first and second operating wavelengths, and an effective area at a wavelength around 1550 nm greater than about 60 &mgr;m2. The cabled fiber has a cutoff wavelength less than about 1300 nm. The fiber allows wavelength division multiplexing (WDM) operation in both the bands (1310 nm and 1550 nm) by reducing nonlinear effects such as four-wave mixing (FWM).
摘要翻译： 公开了一种用于大都市或接入网络的光传输光纤。 传输线包括在大约1310nm的第一工作波长和约1550nm的第二工作波长下是单模的光纤。 光纤的色散在第一和第二波长中的一个处是负的，在另一个波长处是正的，绝对值在约5psps / nm / km之间。 该光纤还具有位于第一和第二工作波长之间的零色散波长，以及在大约1550nm的波长的有效面积大于约60mum2。 电缆光纤具有小于约1300nm的截止波长。 通过减少诸如四波混频（FWM）的非线性效应，该光纤允许在两个频带（1310nm和1550nm）中的波分复用（WDM）操作。
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公开(公告)号：US06507689B2
公开(公告)日：2003-01-14
申请号：US09984170
申请日：2001-10-29
IPC分类号： G02B602
CPC分类号： G02B6/03644 , G02B6/02009 , G02B6/02219 , G02B6/03694
摘要： 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.
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29.发明授权
公开(公告)号：US5808787A
公开(公告)日：1998-09-15
申请号：US792711
申请日：1997-01-29
申请人： Fausto Meli , Giacomo Stefano Roba
发明人： Fausto Meli , Giacomo Stefano Roba
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/06787 , H01S3/1608 , H01S3/1691 , H01S3/1696 , H04B2210/003
摘要： The present invention relates to an optical amplifier and a telecommunication system including a plurality of the optical amplifiers connected in cascade, particularly adapted for a wavelength division multiplexing transmission, in which a combination of dopants in the active fiber core of the optical amplifiers enables a high signal/noise ratio to be achieved for all channels in a predetermined wavelength band, even in the presence of several simultaneously fed signals.
摘要翻译： 本发明涉及一种光放大器和电信系统，其包括级联连接的多个光放大器，特别适用于波分复用传输，其中光放大器的有源光纤芯中的掺杂剂的组合使得高 即使在存在多个同时馈送的信号的情况下，也可以在预定波长频带内对所有信道实现信号/噪声比。
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公开(公告)号：US07779651B2
公开(公告)日：2010-08-24
申请号：US10499022
申请日：2001-12-21
IPC分类号： C03B37/075
CPC分类号： C03B37/016 , C03B19/12 , C03B2203/14 , C03B2203/42
摘要： In a process for manufacturing a micro-structured optical fibre, an intermediate preform is made by forming a sol; pouring the sol in a cylindrical mould including a set of structural generating elements defining internal structural elements of the intermediate preform; transforming the sol into a gel so as to obtain a cylindrical gel body defining the intermediate preform; and removing the cylindrical intermediate preform from the mould.
摘要翻译： 在制造微结构光纤的方法中，通过形成溶胶来制造中间预制件; 将溶胶倒入包括限定中间预制件的内部结构元件的一组结构产生元件的圆柱形模具中; 将溶胶转化成凝胶，以获得限定中间预型体的圆柱形凝胶体; 并从模具中取出圆柱形中间预成型件。
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