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公开(公告)号：US5748364A
公开(公告)日：1998-05-05
申请号：US788457
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.
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2.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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3.发明授权Device and method for manufacturing a preform for optical fibres by chemical vapour deposition 有权通过化学气相沉积制造光纤预制棒的装置和方法公开(公告)号：US08387416B2
公开(公告)日：2013-03-05
申请号：US12267910
申请日：2008-11-10
IPC分类号： C03B37/018
CPC分类号： C03B37/0144 , C03B37/01202 , C03B37/01406 , C03B37/0142 , C03B37/01486 , C03B2207/62 , C03B2207/66 , Y02P40/57
摘要： A method and device for manufacturing a preform for optical fibers through chemical deposition on a substrate for deposition arranged vertically is described, comprising a chemical deposition chamber including at least one gripping member rotatably mounted about an axis Z-Z and adapted to hold at least one end of at least one elongated element constituting a substrate for chemical deposition for the formation of a preform for optical fibers. The chamber includes, moreover, at least one burner which is mobile along a direction Z substantially parallel to said axis Z-Z and adapted to deposit, on said at least one elongated element, a chemical substance for the formation of a preform and at least one suction element for collecting exhaust chemical substances, said at least one suction element being arranged on the opposite side to said at least one burner with respect to said axis Z-Z and being mobile along said direction Z. Said at least one suction element is advantageously positioned at a different height (preferably lower) with respect to that of said at least one burner to optimise the fluid dynamic conditions inside the chemical deposition chamber.
摘要翻译： 描述了一种用于通过化学沉积制造用于光纤的预成型件的方法和装置，所述方法和装置用于垂直布置的用于沉积的基板上，包括化学沉积室，其包括至少一个夹持构件，所述夹持构件围绕轴线ZZ可旋转地安装，并且适于保持 至少一个细长元件构成用于形成用于光纤的预成型体的用于化学沉积的基底。 此外，所述腔室还包括至少一个燃烧器，所述燃烧器沿着基本上平行于所述轴线ZZ的方向Z移动并且适于在所述至少一个细长元件上沉积用于形成预成型件的化学物质，并且至少一个吸力 所述至少一个抽吸元件相对于所述轴线ZZ布置在所述至少一个燃烧器的相对侧上，并且沿着所述方向Z可移动。所述至少一个吸入元件有利地位于 相对于所述至少一个燃烧器的高度（优选地较低），以优化化学沉积室内的流体动力学条件。
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4.发明申请METHOD AND BURNER FOR MANUFACTURING A GLASS OPTICAL FIBRE PREFORM BY VAPOUR DEPOSITION 审中-公开用于通过蒸气沉积制造玻璃光纤预制件的方法和燃烧器公开(公告)号：US20090325111A1
公开(公告)日：2009-12-31
申请号：US12503578
申请日：2009-07-15
IPC分类号： F23D14/32
CPC分类号： F23L7/00 , C03B19/1423 , C03B37/0142 , C03B2207/06 , C03B2207/20 , C03B2207/42 , C03B2207/87 , F23D14/24 , F23D14/32 , F23L2900/07002
摘要： A method is disclosed for feeding a flow of gas to a burner for manufacturing an optical fibre preform, said burner comprising: a plurality of coaxial tubes, each two adjacent coaxial tubes defining an annular channel between themselves; an annular gas distribution chamber at one extremity of said annular channels and in fluid communication therewith, said annular distribution chamber being delimited in the radial direction by an inner and an outer surface; said method comprising introducing the flow of gas into the distribution chamber so that the direction of its radially outermost portion is tangential to the radially outer surface of the distribution chamber. The method allows obtaining a better gas velocity distribution in said annular channels. A burner for performing said method is also disclosed.
摘要翻译： 公开了一种用于将气流供应到用于制造光纤预制件的燃烧器的方法，所述燃烧器包括：多个同轴管，每个两个相邻的同轴管在它们之间限定环形通道; 环形气体分配室，位于所述环形通道的一个末端并与其流体连通，所述环形分配室通过内表面和外表面沿径向界定; 所述方法包括将气流引入分配室，使得其径向最外部分的方向与分配室的径向外表面相切。 该方法允许在所述环形通道中获得更好的气体速度分布。 还公开了一种用于执行所述方法的燃烧器。
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5.发明授权Burner for manufacturing a glass optical fibre preform by vapour deposition 失效用于通过气相沉积制造玻璃光纤预制件的燃烧器公开(公告)号：US07587914B2
公开(公告)日：2009-09-15
申请号：US10478835
申请日：2002-05-27
IPC分类号： C03B37/018
CPC分类号： F23L7/00 , C03B19/1423 , C03B37/0142 , C03B2207/06 , C03B2207/20 , C03B2207/42 , C03B2207/87 , F23D14/24 , F23D14/32 , F23L2900/07002
摘要： A method for feeding a flow of gas to a burner for manufacturing an optical fiber preform. The burner has a plurality of coaxial tubes, each two adjacent coaxial tubes defining an annular channel between themselves; an annular gas distribution chamber at one extremity of the annular channels and in fluid communication therewith, the annular distribution chamber being delimited in the radial direction by an inner and an outer surface. The flow of gas is introduced into the distribution chamber so that the direction of its radially outermost portion is tangential to the radially outer surface of the distribution chamber. The method allows obtaining a better gas velocity distribution in the annular channels.
摘要翻译： 一种用于将气体流供给到用于制造光纤预制件的燃烧器的方法。 燃烧器具有多个同轴管，每个两个相邻的同轴管在它们之间限定环形通道; 环形气体分配室，位于环形通道的一个末端并与其流体连通，环形分配室通过内表面和外表面在径向上限定。 气体流被引入分配室，使得其径向最外部分的方向与分配室的径向外表面相切。 该方法允许在环形通道中获得更好的气体速度分布。
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6.发明授权公开(公告)号：US07409126B2
公开(公告)日：2008-08-05
申请号：US10528836
申请日：2003-09-22
IPC分类号： G02B6/44
CPC分类号： B65H49/02 , C03B37/02745 , C03B37/032 , C03B37/12 , C03B2203/19 , C03B2203/20 , C03B2203/36 , C03B2205/06 , G02B6/02285
摘要： An apparatus for producing a low-PMD optical fiber having a furnace for melting a lower portion of an optical preform; a traction device for pulling an optical fiber from the lower portion of an optical preform; a spinning device for imparting a substantially constant and unidirectional spin to the optical fiber as it is pulled, which causes the fiber to undergo an elastic torsion; a winding device for winding the optical fiber onto a reel; and a twisting device for imparting to the spun optical fiber a unidirectional twist in a direction opposite the elastic torsion, so as to control the residual twist in the optical fiber. A process for producing the fiber, an optical fiber and a cable are also provided.
摘要翻译： 一种用于生产具有用于熔化光学预型件的下部的炉的低PMD光纤的设备; 用于从光学预型件的下部拉动光纤的牵引装置; 旋转装置，用于在被拉动时使光纤基本上恒定且单向旋转，这导致纤维经受弹性扭转; 用于将光纤缠绕到卷轴上的卷绕装置; 以及用于使纺丝光纤沿与弹性扭转相反的方向赋予单向捻度的扭转装置，以便控制光纤中的残余扭曲。 还提供了用于生产纤维，光纤和电缆的方法。
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公开(公告)号：US07317858B2
公开(公告)日：2008-01-08
申请号：US10512241
申请日：2002-04-24
申请人： Giacomo Stefano Roba , Lidia Terruzzi , Sabrina Fogliani , Marco Armondi , Sandra Joanna Nagelvoort , Johannes Adrianus Van Eekelen , Adrianus Gijsbertus Maria Abel , Gouke Dirk Jan Geus , Duurt Pieter Willem Alkema
发明人： Giacomo Stefano Roba , Lidia Terruzzi , Sabrina Fogliani , Marco Armondi , Sandra Joanna Nagelvoort , Johannes Adrianus Van Eekelen , Adrianus Gijsbertus Maria Abel , Gouke Dirk Jan Geus , Duurt Pieter Willem Alkema
IPC分类号： G02B6/02
CPC分类号： G02B6/02033 , C03C25/106 , G02B1/048 , G02B6/02395 , C08L75/04
摘要： An optical fiber having an internal glass portion, a first coating layer surrounding the glass portion and a second coating layer surrounding the first coating layer. The first coating layer is formed from a cured polymeric material obtained by curing a radiation curable composition having a radiation curable oligomer having a backbone derived from polypropylene glycol and a dimer acid based polyester polyol. The cured polymeric material has: (a) a hardening temperature (Th) from −10° C. to about −20° C. and a modulus measured at the Th lower than 5.0 MPa; or (b) a hardening temperature (Th) from −20° C. to about −30° C. and a modulus measured at the Th lower than 20.0 MPa; or (c) a hardening temperature (Th) lower than about −30° C. and a modulus measured at the Th lower than 70.0 MPa.
摘要翻译： 具有内玻璃部分的光纤，围绕玻璃部分的第一涂层和围绕第一涂层的第二涂层。 第一涂层由固化的聚合物材料形成，该聚合材料通过固化具有衍生自聚丙二醇的主链和二聚酸基聚酯多元醇的可辐射固化低聚物的可辐射固化组合物而获得。 固化的聚合物材料具有：（a）从-10℃至约-20℃的硬化温度（Th），在低于5.0MPa的Th下测量的模量; 或（b）-20℃至约-30℃的硬化温度（Th），在低于20.0MPa的Th下测得的模量; 或（c）低于约-30℃的硬化温度（Th）和在低于70.0MPa的Th下测量的模量。
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8.发明授权Optical fiber tensioning device and method of controlling the tension applied to an optical fiber 有权光纤张紧装置和控制施加在光纤上的张力的方法公开(公告)号：US06595454B2
公开(公告)日：2003-07-22
申请号：US09748854
申请日：2000-12-28
IPC分类号： B65H5938
CPC分类号： B65H59/385 , B65H2701/32 , C03B37/032 , C03B37/12 , G02B6/4457
摘要： An optical fibre tensioning device, receiving at its input an optical fibre from a traction device and capable of supplying the optical fibre from its output to a device for storing the fibre. The tensioning device comprises at least one fixed pulley on which the optical fibre is wound for a first length, and at least one movable pulley on which the optical fibre is wound for a second length. A device for measuring the tension applied to the fibre and a motorized device for moving the movable pulley interact with each other to control a distance (Dp) between axes of the pulleys in such a way as to automatically keep the tension applied to the fibre essentially constant.
摘要翻译： 一种光纤张紧装置，在其输入端处接收来自牵引装置的光纤并且能够将光纤从其输出提供给用于存储光纤的装置。 张紧装置包括至少一个固定皮带轮，光纤在其上缠绕第一长度;以及至少一个可动皮带轮，光纤在其上缠绕第二长度。 用于测量施加到纤维的张力的装置和用于移动可动皮带轮的电动装置相互作用以控制滑轮轴线之间的距离（Dp），以便自动保持施加在纤维上的张力基本上 不变。
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公开(公告)号：US06321016B1
公开(公告)日：2001-11-20
申请号：US09335509
申请日：1999-06-18
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.
摘要翻译： 光传输光纤具有折射率分布，在纤芯的内芯处的折射率增加的区域，从内芯径向向外设置的折射率超过内芯的折射率的环形区域，以及在 在内芯和环形区域之间的横截面区域中的至少一个低掺杂剂含量区域。 低损耗包层围绕核心区域。 具有这种分段磁芯轮廓的光传输光纤提供高有效面积，低非线性系数，非零色散和相对平坦的色散斜率。
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10.发明授权Method and induction furnace for drawing large diameter preforms to optical fibres 有权用于将大直径预成型件拉伸到光纤的方法和感应炉公开(公告)号：US07814767B2
公开(公告)日：2010-10-19
申请号：US09986622
申请日：2001-11-09
IPC分类号： C03B37/023 , C03B37/07
CPC分类号： H05B6/20 , C03B37/0124 , C03B37/029 , C03B2205/64 , C03B2205/70 , C03B2205/80 , C03B2205/81 , C03B2205/82 , C03B2205/92 , C03B2205/96 , C03B2205/98 , Y02P40/57
摘要： An induction furnace capable of drawing large diameter preforms of up to 130 mm is described. The induction furnace has top and bottom chimneys surrounding the entire preform during operation of the furnace with an inert conditioning gas which is introduced into the top chimney and flows downward through the furnace body and bottom chimney without significant turbulence. A distributor ring inside the top chimney redirects flow from a circumferential direction to a downward direction. The top chimney also includes a resilient seal to releasably hold the top of the preform. The bottom chimney has a smoothly decreasing cross-sectional area preventing turbulence at the furnace exit. The furnace insulation is preferably a rigid self-supporting graphite cylinder. A method of drawing large diameter preforms either to an optical fiber or to a preform of smaller diameter using such a furnace is also described.
摘要翻译： 描述了能够拉伸高达130mm的大直径预制件的感应炉。 感应炉在炉子运行期间具有围绕整个预制件的顶部和底部烟囱，其中惰性调节气体被引入到顶部烟囱中并且向下流过炉体和底部烟囱而没有显着的湍流。 顶部烟囱内的分配器环将流动从圆周方向重新定向到向下的方向。 顶部烟囱还包括弹性密封件以可释放地保持预制件的顶部。 底部烟囱具有平滑减小的横截面积，防止炉出口处的湍流。 炉绝缘体优选为刚性自支撑石墨圆筒。 还描述了使用这种炉将大直径预成型件拉到光纤或更小直径的预成型件的方法。
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