公开(公告)号：AU6655501A

公开(公告)日：2001-10-03

申请号：AU6655501

申请日：2001-03-14

Applicant: CORNING INC

Inventor： LEI JIANG ,  QI GANG ,  SRIKANT V ,  STONE JEFFERY S ,  TEN SERGEY Y

IPC: G02B6/036

Abstract: Disclosed is a dispersion compensating optical fiber that includes a refractive index profile selected to provide dispersion at 1550 nm of between -90 and -150 ps/nm/km; dispersion slope at 1550 nm of less than -1.5 ps/nm2/km; and kappa of between 40 and 95. The profile preferably has a core surrounded by a cladding layer of refractive index DELTAc, and at least three radially adjacent regions including a central core region having DELTA1, a moat region having a refractive index DELTA2, and an annular ring region having a refractive index DELTA3, wherein DELTA1>DELTA3>DELTAc>DELTA2.

公开(公告)号：ZA200100713B

公开(公告)日：2001-07-17

申请号：ZA200100713

申请日：2001-01-25

Applicant: CORNING INC

Inventor： CAIN MICHAEL B ,  HAWTOF DANIEL WARREN ,  SRIKANT V

IPC: G02B6/00 ,  C03B19/14 ,  C03B37/014 ,  C03B37/018 ,  C03B

Abstract: The present invention is directed to methods of producing soot used in the manufacture of optical waveguides. Both non-aqueous liquid reactants and aqueous solutions containing one or more salts are delivered through an atomizing burner assembly to form a homogenous soot stream containing the oxides of the selected elements contained within the non-aqueous liquid reactant and the aqueous solution. The resulting multi-component soot is collected by conventional methods to form preforms used in the manufacture of optical waveguide fibers. Alternatively, an aqueous solution may be atomized with a gas at a first burner assembly to form an aerosol and a reactant vaporized for delivery to a second burner assembly. Preforms produced by the methods are also disclosed. The aqueous solution is preferably one comprising a metal salt, e.g. acetate, nitrate, sulfate, carbonate, chloride, hydroxide. The metal of the metal salt is preferably an alkali metal, an alkaline earth metal, lead, lanthanum, cobalt, antimony, erbium, aluminum, neodymium, praeseodymium.

公开(公告)号：AU3922400A

公开(公告)日：2000-11-02

申请号：AU3922400

申请日：2000-03-23

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  SRIKANT V

IPC: C03B37/025 ,  C03B37/027 ,  G02B6/036 ,  G02B6/18

Abstract: An optical fiber and method of making, wherein the optical fiber alternates between regions having different diameters along its length, wherein the refractive index of said blank and the diameters of said fiber are chosen to result in a fiber having alternating regions of positive and negative dispersion at a wavelength which is greater than 1480 nm, yet preferably has a low net dispersion and dispersion slope. A preferred such profile consists of a core region surrounded by a cladding region, said core region comprised of an central core region which is updoped with respect to said cladding region, said central core region surrounded by a moat region which is downdoped with respect to said cladding region, and said moat region is surrounded by an annular ring region which is updoped with respect to said cladding region. In addition, a family of profiles is presented which may be used to produce very low dispersion slope fibers. When used in conjunction with alternating positive and negative dispersion regions, lower net dispersion slope can be achieved. Alternatively, the family of profiles is useful in conventional WDM applications.

公开(公告)号：AU1316700A

公开(公告)日：2000-05-22

申请号：AU1316700

申请日：1999-10-18

Applicant: CORNING INC

Inventor： CAIN MICHAEL B ,  HAWTOF DANIEL W ,  SRIKANT V

IPC: G02B6/00 ,  C03B19/14 ,  C03B37/014 ,  C03B37/018

Abstract: The present invention is directed to methods of producing soot used in the manufacture of optical waveguides. Both non-aqueous liquid reactants and aqueous solutions containing one or more salts are delivered through an atomizing burner assembly to form a homogenous soot stream containing the oxides of the selected elements contained within the non-aqueous liquid reactant and the aqueous solution. The resulting multi-component soot is collected by conventional methods to form preforms used in the manufacture of optical waveguide fibers. Alternatively, an aqueous solution may be atomized with a gas at a first burner assembly to form an aerosol and a reactant vaporized for delivery to a second burner assembly. Preforms produced by the methods are also disclosed. The aqueous solution is preferably one comprising a metal salt, e.g. acetate, nitrate, sulfate, carbonate, chloride, hydroxide. The metal of the metal salt is preferably an alkali metal, an alkaline earth metal, lead, lanthanum, cobalt, antimony, erbium, aluminum, neodymium, praeseodymium.

公开(公告)号：WO0192928A3

公开(公告)日：2003-01-16

申请号：PCT/US0115046

申请日：2001-05-10

Applicant: CORNING INC

Inventor： SRIKANT V

IPC: G02B6/036 ,  G02B6/34 ,  G02B6/16 ,  G02B6/22

CPC classification number: G02B6/02004 ,  G02B6/02247 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/03677 ,  G02B6/29376

Abstract: Dispersion managed fibers which preferably have a central core region, a moat region, and a ring region are provided. The central core region preferably has an alpha profile with an alpha value preferably less than about 2.3. The moat region preferably includes four sub-regions, namely, a first sub-region (11) in which the index of refraction decreases, a second sub-region (12) in which the index of refraction increases substantially linearly, a fourth sub-region (14) in which the index of refraction again increases substantially linearly, and a third sub-region (13) which serves as a transition region which smoothly connects the third and fourth substantially linear sub-regions. The dispersion managed fibers preferably have the following properties: (a) they exhibit reduced sensitivity to manufacturing variabilities, (b) they have relatively small changes in mode field diameter at the junctions between fiber sections having positive dispersions and fiber sections having negative dispersions, and/or (c) they can be readily manufactured using the tablet method.

Abstract translation: 提供优选具有中心核心区域，护环区域和环形区域的分散管理的纤维。 中心芯区域优选具有α值优选小于约2.3的α分布。 护城河区域优选地包括四个子区域，即其中折射率降低的第一子区域（11），其中折射率基本上线性地增加的第二子区域（12），第四子区域 其中折射率再次基本上线性地增加的区域（14）和用作平滑地连接第三和第四基本线性子区域的过渡区域的第三子区域（13）。 分散管理的纤维优选具有以下性质：（a）它们对制造变异性的敏感性降低，（b）它们在具有正分散体的纤维部分和具有负分散体的纤维部分之间的接合处的模场直径变化相对较小，以及 /或（c）它们可以使用片剂方法容易地制造。

公开(公告)号：WO02088782A2

公开(公告)日：2002-11-07

申请号：PCT/US0209407

申请日：2002-03-25

Applicant: CORNING INC

Inventor： GROCHOCINSKI JAMES M ,  PASSALUGO JAMES R ,  SRIKANT V ,  VASILYEV MICHAEL

IPC: H04B10/17 ,  G02B

CPC classification number: H04B10/2916

Abstract: An apparatus for transporting an optical signal is provided comprising at least two sections of optical fiber, a directional wavelength selector positioned between the at least two sections of optical fiber wherein the directional wavelength selector selectively blocks wavelengths propagating in a reverse direction, and a pump light emitting device optically coupled to the optical fiber.

Abstract translation: 提供了一种用于传输光信号的装置，包括至少两个光纤部分，位于光纤的至少两个部分之间的定向波长选择器，其中定向波长选择器有选择地阻挡沿相反方向传播的波长和泵浦光 光耦合到光纤的发光器件。

公开(公告)号：WO0248768A3

公开(公告)日：2002-10-17

申请号：PCT/US0146038

申请日：2001-10-31

Applicant: CORNING INC

Inventor： SRIKANT V

IPC: G02B6/028 ,  H04B10/18 ,  G02B6/16

CPC classification number: G02B6/02009 ,  G02B6/02223 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/0286 ,  G02B6/03644 ,  H04B10/25253

Abstract: A dispersion slope compensating optical waveguide, such as a fiber, having a high negative dispersion slope (i.e. a dispersion slope in the range of -2 ps/nm -km to -40ps/nm - km) is provided. The optical ps/waveguide comprises a core region and a clad layer. The core region further comprises a first region and a second region surrounding the first region. The width of the second region is sufficient to confine electromagnetic radiation within a selected wavelength range to substantially only the core region. Thus, bending loss in the waveguide is substantially reduced. The negative dispersion slope of the dispersion slope compensating optical waveguide can be used in conjunction with a dispersion compensating optical waveguide as a dual optical waveguide to compensate both the dispersion and dispersion slope of a transmission waveguide. An optical span and an optical transmission system incorporating the dual optical waveguide is also provided.

Abstract translation: 提供具有高负色散斜率（即在-2ps / nm <2> -km至-40ps / nm 2 - km的范围内的色散斜率）的诸如光纤的色散斜率补偿光波导 。 光学ps /波导包括芯区域和覆层。 芯区域还包括围绕第一区域的第一区域和第二区域。 第二区域的宽度足以将电磁辐射限制在基本上仅芯区域的选定波长范围内。 因此，波导中的弯曲损耗显着降低。 色散斜率补偿光波导的负色散斜率可以与色散补偿光波导一起用作双光波导，以补偿传输波导的色散和色散斜率。 还提供了包括双光波导的光学跨距和光传输系统。

公开(公告)号：WO0249977A2

公开(公告)日：2002-06-27

申请号：PCT/US0146274

申请日：2001-10-31

Applicant: CORNING INC

Inventor： DAWES STEVEN B ,  SCHERMERHORN ANDREW P ,  SRIKANT V ,  TANDON PUSHKAR

IPC: C03B37/014 ,  C03B37/018

CPC classification number: C03B37/01853 ,  C03B37/01413 ,  C03B37/01446 ,  C03B37/01807 ,  C03B2201/12 ,  C03B2207/30

Abstract: The invention relates to the manufacturing of a preform having at least one fluorine doped region. One method of the invention for producing the fluorinated preform includes heat treating a porous soot preform, the preform substantially devoid of any sintered glass layer, to a temperature of greater than about 1200 DEG C. The method further includes exposing the preform to an atmosphere comprising a fluorine containing compound, wherein the time and the temperature of said exposing step is controlled so that F comprises > about 1 wherein F is defined as Rmax/(D/k)1/2, wherein Rmax is the outer radius of the preform, D is the diffusion coefficient of the fluorine containing compound into the preform, and k is the reaction rate constant of the reaction between the fluorine and the soot, thereby controlling the radial penetration of fluorine into the preform. A second method includes depositing fluorine doped silica soot on a starting member to form a soot preform having at least one fluorine doped soot region and heating the soot preform at a rate of more than about 10 DEG C/min to a temperature of more than about 1300 DEG C. A third method includes heating a preform having at least one region of fluorine doped soot at a rate of more than about 10 DEG C/min to a temperature of more than about 1400 DEG C.

Abstract translation: 本发明涉及具有至少一个氟掺杂区域的预制件的制造。 用于生产氟化预成型件的本发明的一种方法包括将多孔烟炱预制件（基本上没有任何烧结玻璃层的预制件）热处理至大于约1200℃的温度。该方法还包括将预成型坯暴露于包括 含氟化合物，其中控制所述曝光步骤的时间和温度使得F包含>约1，其中F定义为Rmax /（D / k）1/2，其中Rmax是预成型件的外半径， D是含氟化合物进入预成型体的扩散系数，k是氟和烟灰之间的反应的反应速率常数，从而控制氟进入预成型体的径向渗透。 第二种方法包括在起始构件上沉积氟掺杂的二氧化硅烟炱以形成具有至少一个氟掺杂烟灰区域的烟炱预制件，并以大于约10℃/分钟的速率将烟炱预制件加热到大于约 1300℃。第三种方法包括将具有氟掺杂烟灰的至少一个区域的预成型体以大于约10℃/分钟的速率加热到大于约1400℃的温度。

公开(公告)号：WO0198819A3

公开(公告)日：2002-05-10

申请号：PCT/US0114329

申请日：2001-05-03

Applicant: CORNING INC

Inventor： FAJARDO JAMES C ,  SRIKANT V ,  WEST JAMES A

IPC: G02B6/00 ,  G02B6/02 ,  G02B6/032 ,  G02B6/16

CPC classification number: G02B6/02333 ,  G02B6/02261 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/0238 ,  G02B6/03677

Abstract: A fiber optic waveguide is disclosed. The fiber optic waveguide includes a core region (44), and a moat region (50) surrounding the core region (44). A cladding region (42) surrounds the moat region (50) and the core region (44). The cladding region (42) includes a lattice (56) of column structures disposed within a solid background matrix (48). The diameter of the core region (44) is sized for making contact with the moat region (50) for creating an extended core region (54) at longer wavelengths. The core region (44), the moat region (50), and the cladding region (42) function to produce unique dispersion compensating properties, which include negative dispersion and positive dispersion. The core region (44) may be formed from a high index material and the moat region (50) may be formed from a material having a refractive index lower than the refractive index of the core region (44). The cladding region (42) is formed from a material having a refractive index which is higher than the index of the moat region (50) and lower than the refractive index of core region (44).

Abstract translation: 公开了一种光纤波导。 光纤波导包括芯区域（44）和围绕芯区域（44）的护环区域（50）。 围绕护城河区域（50）和核心区域（44）的包层区域（42）。 包层区域（42）包括设置在固体背景矩阵（48）内的列结构的晶格（56）。 核心区域（44）的直径的尺寸设置成与护环区域（50）接触，以产生更长波长的延伸芯部区域（54）。 核心区域（44），护城河区域（50）和包层区域（42）起着独特的色散补偿特性的作用，其包括负色散和正色散。 芯区域（44）可以由高折射率材料形成，并且护环区域（50）可以由折射率低于芯部区域（44）的折射率的材料形成。 包层区域（42）由折射率高于护环区域（50）的折射率并低于芯部区域（44）的折射率的材料形成。

公开(公告)号：WO0173486A3

公开(公告)日：2002-04-18

申请号：PCT/US0105532

申请日：2001-02-21

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  BICKHAM SCOTT R ,  CAIN MICHAEL B ,  HAJCAK PAMELA A ,  MANYAM UPENDRA H ,  MISHRA SNIGDHARAJ K ,  SRIKANT V

IPC: G02B6/036 ,  H04B10/02 ,  H04B10/28 ,  G02B6/16 ,  H04B10/18

CPC classification number: G02B6/02004 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/0286 ,  G02B6/03677 ,  G02B6/03688

Abstract: Disclosed is a dispersion compensating and dispersion slope compensating single mode optical waveguide fiber. The refractive index profiles of waveguide fibers in accord with the invention are disclosed and described. These index profiles provide a waveguide fiber having negative total dispersion and negative total dispersion slope so that a standard waveguide fiber is compensated over an extended wavelength range. A telecommunications link using the fiber in accord with the invention is also disclosed and described. A standard fiber to compensating fiber length ratio in the range of 1:1 to 3:1 is shown to give optimum link performance with respect to limiting non-linear dispersion effects.

Abstract translation: 公开了一种色散补偿和色散斜率补偿单模光纤。 公开和描述了符合本发明的波导纤维的折射率分布。 这些折射率分布提供具有负总色散和负总色散斜率的波导光纤，使得标准波导光纤在扩展的波长范围内被补偿。 还公开和描述了使用根据本发明的光纤的电信链路。 示出了在1：1至3：1的范围内补偿光纤长度比的标准光纤在限制非线性色散效应方面给出最佳的链路性能。