公开(公告)号：US07167621B2

公开(公告)日：2007-01-23

申请号：US10981437

申请日：2004-11-03

申请人： Upendra H. Manyam ,  Kanishka Tankala ,  Nils Jacobson

发明人： Upendra H. Manyam ,  Kanishka Tankala ,  Nils Jacobson

IPC分类号： G02B6/02 ,  G02B6/00

CPC分类号： G02B6/02 ,  C03B37/02718 ,  C03B37/02727 ,  C03B37/02745 ,  C03B2203/18 ,  C03B2203/19 ,  C03B2205/06 ,  C03B2205/20 ,  C03B2205/56 ,  G02B6/02052

摘要： An optical fiber for the transmission of electromagnetic energy, where the fiber can have increased input power threshold for the onset of Stimulated Brillouin Scattering (SBS). The fiber can comprise a core and a cladding disposed about the core. The core can have a distribution of velocities for an acoustic wave associated with SBS, where the distribution of propagation velocities of the core for the acoustic wave is at least one of a) azimuthally asymmetric or b) non-constant in an azimuthal plane and longitudinally asymmetric. The fiber can be longitudinally asymmetric wherein the core includes a first portion having a propagation velocity for the acoustic wave that is substantially the same throughout interposed between longitudinally spaced portions each having a propagation velocity different than that of said first portion. Methods, such as, for example, methods for fabricating and/or using a fiber having an increased threshold input power for the onset of SBS, are also disclosed.

摘要翻译： 用于传输电磁能的光纤，其中光纤可以具有增加的刺激布里渊散射（SBS）开始的输入功率阈值。 纤维可以包括围绕芯部设置的芯和包层。 核心可以具有与SBS相关联的声波的速度分布，其中用于声波的芯的传播速度的分布是以下中的至少一个：方位角平面中的方位角不对称或b）非常数和纵向 不对称。 纤维可以是纵向不对称的，其中芯包括具有声波的传播速度的第一部分，该第一部分在插入纵向间隔的部分之间基本上相同，每个部分的传播速度不同于所述第一部分的传播速度。 还公开了诸如用于制造和/或使用具有增加的用于SBS开始的阈值输入功率的光纤的方法。

公开(公告)号：US07156154B2

公开(公告)日：2007-01-02

申请号：US11123124

申请日：2005-05-06

申请人： Nils Jacobson ,  Jan Erik Eriksson ,  Erik Svensson

发明人： Nils Jacobson ,  Jan Erik Eriksson ,  Erik Svensson

IPC分类号： B22D11/00 ,  B22D27/02

CPC分类号： B22D11/115

摘要： The present invention relates to a device for continuous or semi-continuous casting of a metal material. The device comprises a first arrangement comprising a coil (7) having an extension around the casting mould (2) in an area, which is arranged to comprise molten metal material. The coil (7) is arranged to be fed with alternating current such that a varying magnetic field generated and is applied to the molten metal material in the casting mould (2). The device also comprises a second arrangement comprising at least two magnetic poles (8), which are provided at opposite sides of the casting mould (2). The poles (8) are arranged to supply a static or periodic low-frequency magnetic field to the molten metal material in the casting area. The poles (8) comprise at least a portion (11) which comprises a plurality of material layers which are electrically insulated from each other.

摘要翻译： 本发明涉及一种用于连续或半连续铸造金属材料的装置。 该装置包括第一装置，其包括线圈（7），该线圈（7）在一个区域中具有围绕铸模（2）的延伸部，该区域布置成包括熔融金属材料。 线圈（7）被布置成被馈送交流电流，使得产生并施加到铸模（2）中的熔融金属材料的变化的磁场。 该装置还包括第二装置，其包括设置在铸模（2）的相对侧的至少两个磁极（8）。 极（8）布置成向铸造区域中的熔融金属材料提供静态或周期性的低频磁场。 极（8）包括至少一部分（11），其包括彼此电绝缘的多个材料层。

公开(公告)号：US20060245714A1

公开(公告)日：2006-11-02

申请号：US11453187

申请日：2006-06-13

申请人： Julia Farroni ,  Upendra Manyam ,  Nils Jacobson ,  Kanishka Tankala ,  Adrian Carter

发明人： Julia Farroni ,  Upendra Manyam ,  Nils Jacobson ,  Kanishka Tankala ,  Adrian Carter

IPC分类号： G02B6/02

CPC分类号： G02B6/105 ,  G02B6/02009 ,  G02B6/02033 ,  G02B6/024 ,  G02B6/03638 ,  G02B6/03661 ,  G02B6/03688 ,  G02B6/03694 ,  H01S3/06729 ,  H01S3/094007

摘要： A fiber optic article, such as an optical fiber or an optical preform, can include a core comprising a concentration of erbium, a concentration of fluorine and a concentration of ytterbium for sensitizing the erbium by absorbing pump light and transferring energy to the erbium. The erbium can provide light having a second wavelength different than the wavelength of the pump light. The article can also include a concentration of phosphorus. The fiber optic article can include a cladding disposed about the core, where the cladding has an index of refraction that is less than the index of refraction of the core, and a second cladding disposed about the first cladding, where the second cladding includes an index of refraction than is less than the index of refraction of the cladding. The fiber optic article can be elongate along a longitudinal axis and can include a longitudinally extending region for providing birefringence.

公开(公告)号：US07121324B2

公开(公告)日：2006-10-17

申请号：US10502203

申请日：2003-01-16

申请人： Nils Jacobson ,  Erik Svensson

发明人： Nils Jacobson ,  Erik Svensson

IPC分类号： B22D27/02

CPC分类号： B22D11/115

摘要： A device for continuous or semi-continuous casting of metal comprising a mould having a number of mould elements (1, 2) which together form a mould adapted for receiving a liquid metal (6), a mould supporting structure (30, 31) surrounding the mould and mechanically supporting it, and an induction coil (20) arranged close to the mould for reducing the contact pressure between the melt and the mould. At least one of the mould elements is divided into at least a first (1a, 2a) and a second (1b, 2b) part arranged so that they are electrically insulated from each other, the first mould element part being arranged before the second mould element part relative to the casting direction and said induction coil is arranged close to the first mould element part (1a, 2a).

摘要翻译： 一种用于连续或半连续铸造金属的装置，包括具有多个模具元件（1,2）的模具，所述模具元件一起形成适于容纳液态金属（6）的模具，模具支撑结构（30,31）围绕 模具并机械地支撑模具，以及设置在模具附近的感应线圈（20），用于减小熔体和模具之间的接触压力。 至少一个模具元件被分成至少第一（1a，2a）和第二（1b，2b）部分，其布置成使得它们彼此电绝缘，第一模具元件部分被布置 在第二模具元件部分相对于铸造方向之前，并且所述感应线圈布置成靠近第一模具元件部分（1a，2a）。

公开(公告)号：US20060198590A1

公开(公告)日：2006-09-07

申请号：US11419907

申请日：2006-05-23

申请人： Julia Farroni ,  Upendra Manyam ,  Nils Jacobson ,  Kanishka Tankala ,  Adrian Carter

发明人： Julia Farroni ,  Upendra Manyam ,  Nils Jacobson ,  Kanishka Tankala ,  Adrian Carter

IPC分类号： G02B6/02

CPC分类号： G02B6/024

摘要： A fiber optic article can comprise a core, an inner region disposed about the core and a cladding disposed about the inner region. The index of refraction of the cladding can be less than that of the inner region, and the index of refraction of the inner region can be less than that of the core. The fiber can include a second cladding disposed about the cladding, where the second cladding has an index of refraction that is less than the index of refraction of the cladding. The inner region can have a non circular outer perimeter that includes at least one inwardly oriented section. The article can be elongate along a longitudinal axis and can include at least one longitudinally extending region, such as a stress inducing region, for providing birefringence and the inwardly oriented region can face the longitudinally extending region. The fiber optic article can include active material for providing light responsive to the article receiving pump light, such as, for example, one or more rare earths. The rare earths can include erbium and ytterbium.

摘要翻译： 光纤制品可以包括芯，围绕芯设置的内部区域和围绕内部区域设置的包层。 包层的折射率可以小于内部区域的折射率，并且内部区域的折射率可以小于芯部的折射率。 纤维可以包括围绕包层设置的第二包层，其中第二包层的折射率小于包层的折射率。 内部区域可以具有包括至少一个向内定向的部分的非圆形外周边。 该制品可以沿纵向轴线延伸并且可以包括至少一个纵向延伸区域，例如应力诱导区域，用于提供双折射，并且向内取向区域可面向纵向延伸区域。 光纤制品可以包括用于提供响应于物品接收泵浦光的光的活性材料，例如一个或多个稀土。 稀土可以包括铒和镱。

公开(公告)号：US20050155739A1

公开(公告)日：2005-07-21

申请号：US10502203

申请日：2003-01-16

申请人： Nils Jacobson ,  Erik Svensson

发明人： Nils Jacobson ,  Erik Svensson

IPC分类号： B22D11/04 ,  B22D11/11 ,  B22D11/115 ,  B22D11/00 ,  B22D27/02

CPC分类号： B22D11/115

摘要： A device for continuous or semi-continuous casting of metal comprising a mould having a number of mould elements (1, 2) which together form a mould adapted for receiving a liquid metal (6), a mould supporting structure (30, 31) surrounding the mould and mechanically supporting it, and an induction coil (20) arranged close to the mould for reducing the contact pressure between the melt and the mould. At least one of the mould elements is divided into at least a first (1a, 2a) and a second (1b, 2b) part arranged so that they are electrically insulated from each other, the first mould element part being arranged before the second mould element part relative to the casting direction and said induction coil is arranged close to the first mould element part (1a, 2a).

摘要翻译： 一种用于连续或半连续铸造金属的装置，包括具有多个模具元件（1,2）的模具，所述模具元件一起形成适于容纳液态金属（6）的模具，模具支撑结构（30,31）围绕 模具并机械地支撑模具，以及设置在模具附近的感应线圈（20），用于减小熔体和模具之间的接触压力。 至少一个模具元件被分成至少第一（1a，2a）和第二（1b，2b）部分，其布置成使得它们彼此电绝缘，第一模具元件部分被布置 在第二模具元件部分相对于铸造方向之前，并且所述感应线圈布置成靠近第一模具元件部分（1a，2a）。

公开(公告)号：US20100008634A1

公开(公告)日：2010-01-14

申请号：US12562749

申请日：2009-09-18

申请人： Douglas Guertin ,  Nils Jacobson ,  Kanishka Tankala ,  Adrian Carter

发明人： Douglas Guertin ,  Nils Jacobson ,  Kanishka Tankala ,  Adrian Carter

IPC分类号： G02B6/036 ,  C03B37/02

CPC分类号： C03B37/01222 ,  C03B37/01228 ,  C03B37/01231 ,  C03B37/02763 ,  C03B2203/18 ,  C03B2203/20 ,  C03B2203/32 ,  C03B2203/34 ,  C03B2205/06 ,  C03B2205/07 ,  G02B6/02042 ,  H01S3/06704 ,  H01S3/06708

摘要： An optical fiber preform, and method for fabricating, having a first core, a second core spaced from the first core and first and second regions, the first region having an outer perimeter having a first substantially straight length and the second region having an outer perimeter having a second substantially straight length facing the first straight length. One of the regions can comprise the first core and the other comprises the second core. The preform can be drawn with rotation to provide a fiber wherein a first core of the fiber is multimode at a selected wavelength of operation and a second core of the fiber is spaced from and winds around the first core and has a selected longitudinal pitch. The second core of the fiber can couple to a higher order mode of the first core and increase the attenuation thereof relative to the fundamental mode of the first core.

摘要翻译： 一种光纤预制件及其制造方法，具有第一芯体，与第一芯体以及第一和第二区域隔开的第二芯体，第一区域具有第一基本上直的长度的外周边，第二区域具有外周边 具有面向第一直线长度的第二基本上直的长度。 其中一个区域可以包括第一核心，另一个包括第二核心。 预成型件可以旋转拉伸以提供纤维，其中纤维的第一纤芯在所选波长的操作下是多模的，并且纤维的第二纤芯与第一纤芯间隔开并卷绕第一纤芯并具有选定的纵向间距。 光纤的第二核心可以耦合到第一核心的更高阶模式并且相对于第一核心的基本模式增加其衰减。

公开(公告)号：US20060251367A1

公开(公告)日：2006-11-09

申请号：US11338144

申请日：2006-01-23

申请人： Martin Seifert ,  Upendra Manyam ,  Michael O'Connor ,  Nils Jacobson

发明人： Martin Seifert ,  Upendra Manyam ,  Michael O'Connor ,  Nils Jacobson

IPC分类号： G02B6/26

CPC分类号： G02B6/2856 ,  G02B6/03611 ,  H01S3/0675 ,  H01S3/094007 ,  H01S3/094019

摘要： An optical fiber coupler can include at least a first input optical fiber and an output optical fiber, where the first input optical fiber can comprise an antiguiding core, a first cladding disposed about the antiguiding core and a second cladding disposed about the first cladding so as to tend to confine light to said first cladding. The output fiber can comprise a guiding core, a first cladding disposed about the guiding core and a second cladding disposed about the first cladding of the output fiber for tending to confine light to the first cladding of the output fiber. Optical fibers are also disclosed, as are methods.

摘要翻译： 光纤耦合器可以包括至少第一输入光纤和输出光纤，其中第一输入光纤可以包括防护芯，围绕防护芯设置的第一包层和围绕第一包层设置的第二包层，以便 倾向于将光限制到所述第一包层。 输出光纤可以包括引导芯，围绕导向芯设置的第一包层和围绕输出光纤的第一包层设置的第二包层，用于将光限制在输出光纤的第一包层上。 还公开了光纤，方法也是公开的。

公开(公告)号：US20060093294A1

公开(公告)日：2006-05-04

申请号：US10981437

申请日：2004-11-03

申请人： Upendra Manyam ,  Kanishka Tankala ,  Nils Jacobson

发明人： Upendra Manyam ,  Kanishka Tankala ,  Nils Jacobson

IPC分类号： G02B6/02

CPC分类号： G02B6/02 ,  C03B37/02718 ,  C03B37/02727 ,  C03B37/02745 ,  C03B2203/18 ,  C03B2203/19 ,  C03B2205/06 ,  C03B2205/20 ,  C03B2205/56 ,  G02B6/02052

摘要： An optical fiber for the transmission of electromagnetic energy, where the fiber can have increased input power threshold for the onset of Stimulated Brillouin Scattering (SBS). The fiber can comprise a core and a cladding disposed about the core. The core can have a distribution of velocities for an acoustic wave associated with SBS, where the distribution of propagation velocities of the core for the acoustic wave is at least one of a) azimuthally asymmetric or b) non-constant in an azimuthal plane and longitudinally asymmetric. The fiber can be longitudinally asymmetric wherein the core includes a first portion having a propagation velocity for the acoustic wave that is substantially the same throughout interposed between longitudinally spaced portions each having a propagation velocity different than that of said first portion. Methods, such as, for example, methods for fabricating and/or using a fiber having an increased threshold input power for the onset of SBS, are also disclosed.

摘要翻译： 用于传输电磁能的光纤，其中光纤可以具有增加的刺激布里渊散射（SBS）开始的输入功率阈值。 纤维可以包括围绕芯部设置的芯和包层。 核心可以具有与SBS相关联的声波的速度分布，其中用于声波的芯的传播速度的分布是以下中的至少一个：方位角平面中的方位角不对称或b）非常数和纵向 不对称。 纤维可以是纵向不对称的，其中纤芯包括第一部分，该第一部分具有与声波的传播速度基本相同的第一部分，整个插入在纵向间隔的部分之间，每个部分的传播速度不同于所述第一部分的传播速度。 还公开了诸如用于制造和/或使用具有增加的用于SBS开始的阈值输入功率的光纤的方法。

公开(公告)号：US20050254765A1

公开(公告)日：2005-11-17

申请号：US11121501

申请日：2005-05-03

申请人： Martin Seifert ,  Upendra Manyam ,  Mansoor Alam ,  Kanishka Tankala ,  Jaroslaw Abramczyk ,  Douglas Guertin ,  Nils Jacobson

发明人： Martin Seifert ,  Upendra Manyam ,  Mansoor Alam ,  Kanishka Tankala ,  Jaroslaw Abramczyk ,  Douglas Guertin ,  Nils Jacobson

IPC分类号： C03C25/10 ,  G02B6/02 ,  G02B6/16

CPC分类号： C03C25/105 ,  G02B6/02033

摘要： An optical fiber comprising a multimode glass core having a diameter of at least 250 microns and an index of refraction and a polymer cladding having a thickness and contactingly surrounding a glass portion of the fiber so as to define an interface between the glass portion and the polymer cladding. The polymer cladding can have a first index of refraction that is less than the index of refraction. The fiber can comprise a density of less than 0.25 non-conforming regions having a diameter of 25 microns or greater per millimeter of length along the fiber, where each of the non-conforming regions is a region visible to the human eye under an optical microscope and having at least a portion thereof within a selected distance of the interface. The selected distance can be less than or equal to the thickness of the polymer cladding. The optical microscope can have a total magnification of about 200. The polymer cladding can be applied to at least a part of the optical fiber in at least a class 1000 environment. Methods of using optical fibers, including receiving with an optical fiber optical energy from a source and guiding the optical energy with the optical fiber, wherein the optical energy comprises at least one of 1) pulses each comprising a peak power of at least 10 kW, 2) an average power of at least 50 Watts, or 3) an average power density of at least 2.9 kW/cm2.

摘要翻译： 一种光纤，其包括具有至少250微米直径的多模玻璃芯和折射率和聚合物包层，其具有厚度并且接触地围绕所述纤维的玻璃部分以限定所述玻璃部分和所述聚合物之间的界面 包层 聚合物包层可以具有小于折射率的第一折射率。 纤维可以包含小于0.25个不均匀区域的密度，沿着纤维具有每毫米长度的直径为25微米或更大的不符合区域，其中每个不一致区域是在光学显微镜下人眼可见的区域 并且在接口的选定距离内具有至少一部分。 所选择的距离可以小于或等于聚合物包层的厚度。 光学显微镜可以具有约200的总放大率。聚合物包层可以在至少1000级环境中施加到光纤的至少一部分。 使用光纤的方法，包括从光源接收光纤光能并用光纤引导光能，其中光能包括以下各项中的至少一个：每个脉冲包括至少10kW的峰值功率， 2）至少50瓦的平均功率，或3）平均功率密度为至少2.9kW / cm 2。