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    Article comprising a fiber raman device
    21.
    发明授权
    Article comprising a fiber raman device 有权
    文章包括纤维拉曼装置

    公开(公告)号：US06434172B1

    公开(公告)日：2002-08-13

    申请号：US09369393

    申请日：1999-08-06

    Applicant: David John DiGiovanni ,  Daryl Inniss ,  Ralph Stephen Jameson ,  Sandra Greenberg Kosinski

    Inventor： David John DiGiovanni ,  Daryl Inniss ,  Ralph Stephen Jameson ,  Sandra Greenberg Kosinski

    IPC: H01S330

    CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094042 ,  H01S3/094046 ,  H01S3/094096 ,  H01S3/30

    Abstract: The disclosed fiber Raman device comprises means for coupling pump radiation of a first wavelength &lgr;1 and a second wavelength &lgr;2 into a length of silica-based fiber, with &lgr;1 being different from &lgr;2, and with both of &lgr;1 and &lgr;2 being less than an output radiation &lgr;0 of the fiber Raman device. The Raman device further comprises at least a first and a second wavelength-selective element disposed to provide one or more optical cavities for Raman shifting of light in the fiber. At least one of the optical cavities is selected such that at least one of &lgr;1 and &lgr;2 is off resonance. Exemplarily, the Raman device is a topologically linear or circular Raman laser or amplifier, and the wavelength selective element is a fiber Bragg grating or a WDM. The Raman device is advantageously used in an optical fiber communication system.

    Abstract translation: 所公开的光纤拉曼装置包括用于将第一波长lambd1和第二波长lambd2的泵浦辐射耦合到长度为二氧化硅的纤维中的装置，其中lambd1不同于lambd2，并且lambd1和lambd2都小于输出辐射 lambd0的光纤拉曼装置。 所述拉曼装置还包括至少第一和第二波长选择元件，所述第一和第二波长选择元件设置成提供一个或多个用于在所述光纤中的光的拉曼移位的光学腔。 光腔中的至少一个被选择为使得lambd1和lambd2中的至少一个不共振。 示例性地，拉曼器件是拓扑线性或圆形拉曼激光器或放大器，并且波长选择元件是光纤布拉格光栅或WDM。 拉曼装置有利地用于光纤通信系统中。

    Reduced bend sensitivity and catastrophic bend loss in single mode optical fibers and method of making same
    25.
    发明授权
    Reduced bend sensitivity and catastrophic bend loss in single mode optical fibers and method of making same 有权
    降低单模光纤的弯曲灵敏度和灾难性弯曲损耗及其制作方法

    公开(公告)号：US08107784B2

    公开(公告)日：2012-01-31

    申请号：US12472522

    申请日：2009-05-27

    Applicant: Peter Ingo Borel ,  David John DiGiovanni ,  John Michael Fini ,  Poul Kristensen

    Inventor： Peter Ingo Borel ,  David John DiGiovanni ,  John Michael Fini ,  Poul Kristensen

    IPC: G02B6/36 ,  G02B6/02

    CPC classification number: C03B37/018 ,  C03B37/01211 ,  C03B37/01807 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2203/23 ,  G02B6/02342 ,  G02B6/03672 ,  G02B6/03677 ,  G02B6/03683 ,  G02B6/03688 ,  G02B6/14 ,  Y02P40/57

    Abstract: An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes (i) an outer cladding region, (ii) an annular pedestal (or ring) region, (iii) an annular inner trench region, and (iv) an annular outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. In order to suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region. In a preferred embodiment, the fiber is configured so that, at a signal wavelength of approximately 1550 nm, its bend loss is no more than about 0.1 dB/turn at bend radius of 5 mm and is no more than about 0.02 dB/turn at a bend radius of 10 mm. In addition, in one embodiment, the core region also includes an inner core region and an annular outer core (or shelf) region surrounding the inner core region. The outer core region extends radially a distance of less than 9 μm from the fiber axis. In another embodiment, the inner trench region includes an annular inner portion and an annular outer (or step) portion surrounding said inner portion. The refractive index of the step portion is greater than that of the inner portion. In a preferred embodiment, both of the foregoing features of the core region and the inner trench region are incorporated in the fiber. Also described are multi-tube fabrication techniques for making such fibers.

    Abstract translation: 对弯曲损耗相对不敏感并减轻灾难性弯曲损耗的问题的光纤包括芯区域和被配置为支撑和引导基本横向模式的光的传播的包层区域。 包层区域包括（i）外包层区域，（ii）环形基座（或环）区域，（iii）环形内沟槽区域和（iv）环形外沟槽区域。 基座区域和外部包层区域的折射率相对于外部包层区域的折射率相对接近。 为了抑制HOM，基座区域被配置为将芯区域（基本模式除外）的至少一个（不需要的）横向模式谐振地耦合到基座区域的至少一个横向模式。 在优选实施例中，光纤被配置为使得在大约1550nm的信号波长处，其弯曲半径在5mm处的弯曲损耗不超过约0.1dB /匝，并且在不超过约0.02dB /匝 弯曲半径为10mm。 此外，在一个实施例中，芯区域还包括内芯区域和围绕内芯区域的环形外芯（或搁架）区域。 外芯区域从纤维轴径向延伸小于9μm的距离。 在另一个实施例中，内沟槽区域包括环形内部部分和围绕所述内部部分的环形外（或台阶）部分。 台阶部分的折射率大于内部部分的折射率。 在一个优选实施例中，芯部区域和内部沟槽区域的前述特征都包含在纤维中。 还描述了用于制造这种纤维的多管制造技术。

    High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers
    26.
    发明授权
    High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers 有权
    采用大面积，多模，增益光纤的大功率光学装置

    公开(公告)号：US07916386B2

    公开(公告)日：2011-03-29

    申请号：US11698541

    申请日：2007-01-26

    Applicant: David John DiGiovanni ,  Clifford Everill Headley

    Inventor： David John DiGiovanni ,  Clifford Everill Headley

    IPC: H04B10/17 ,  H01S3/00

    CPC classification number: G02B6/262 ,  G02B6/02019 ,  G02B6/2552 ,  G02B6/2804 ,  G02B6/32

    Abstract: Optical apparatus includes a multimode, gain-producing fiber for providing gain to signal light propagating in the core of the fiber, and a pump source for providing pump light that is absorbed in the core, characterized in that (i) the pump source illustratively comprises a low brightness array of laser diodes and a converter for increasing the brightness of the pump light, (ii) the pump light is coupled directly into the core, and (iii) the area of the core exceeds approximately 350 μm2. In one embodiment, the signal light propagates in a single mode, and the pump light co-propagates in at least the same, single mode, both in a standard input fiber before entering the gain-producing fiber, and a mode expander is disposed between the input fiber and the gain-producing fiber. In another embodiment, multiple pumps are coupled into the core of the gain-producing fiber. The pumps may generate light of the same wavelength or of different wavelengths. In accordance with a particular embodiment of our invention, we have demonstrated amplification of nanosecond optical pulses at 1545 nm in a single clad Er-doped fiber having a core area of 875 μm2; the core was pumped by a high brightness Raman laser at 1480 nm; and the pulses had a record peak power of several hundred kW.

    Abstract translation: 光学装置包括用于对在光纤的芯中传播的信号光提供增益的多模增益产生光纤，以及用于提供被吸收在芯中的泵浦光的泵浦源，其特征在于（i）泵浦源包括 激光二极管的低亮度阵列和用于增加泵浦光的亮度的转换器，（ii）泵浦光直接耦合到芯中，以及（iii）芯的区域超过约350μm2。 在一个实施例中，信号光以单个模式传播，并且泵浦光在进入增益产生光纤之前在标准输入光纤中以至少相同的单一模式共同传播，并且模式扩展器设置在 输入光纤和增益光纤。 在另一个实施例中，多个泵耦合到增益产生光纤的芯中。 泵可以产生相同波长或不同波长的光。 根据本发明的具体实施方案，我们已经证明了在核心面积为875μm2的单包层掺铒光纤中在1545nm处的纳秒光脉冲的放大; 核心由1480nm的高亮度拉曼激光器泵浦; 脉冲具有数百千瓦的峰值功率。

    High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers
    27.
    发明申请
    High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers 有权
    采用大面积，多模，增益光纤的大功率光学装置

    公开(公告)号：US20080180787A1

    公开(公告)日：2008-07-31

    申请号：US11698541

    申请日：2007-01-26

    Applicant: David John DiGiovanni ,  Clifford Everill Headley

    Inventor： David John DiGiovanni ,  Clifford Everill Headley

    IPC: H01S3/09

    CPC classification number: G02B6/262 ,  G02B6/02019 ,  G02B6/2552 ,  G02B6/2804 ,  G02B6/32

    Abstract: Optical apparatus includes a multimode, gain-producing fiber for providing gain to signal light propagating in the core of the fiber, and a pump source for providing pump light that is absorbed in the core, characterized in that (i) the pump source illustratively comprises a low brightness array of laser diodes and a converter for increasing the brightness of the pump light, (ii) the pump light is coupled directly into the core, and (iii) the area of the core exceeds approximately 350 μm2. In one embodiment, the signal light propagates in a single mode, and the pump light co-propagates in at least the same, single mode, both in a standard input fiber before entering the gain-producing fiber, and a mode expander is disposed between the input fiber and the gain-producing fiber. In another embodiment, multiple pumps are coupled into the core of the gain-producing fiber. The pumps may generate light of the same wavelength or of different wavelengths. In accordance with a particular embodiment of our invention, we have demonstrated amplification of nanosecond optical pulses at 1545 nm in a single clad Er-doped fiber having a core area of 875 μm2; the core was pumped by a high brightness Raman laser at 1480 nm; and the pulses had a record peak power of several hundred kW.

    Abstract translation: 光学装置包括用于对在光纤的芯中传播的信号光提供增益的多模增益产生光纤，以及用于提供被吸收在芯中的泵浦光的泵浦源，其特征在于（i）泵浦源包括 激光二极管的低亮度阵列和用于增加泵浦光的亮度的转换器，（ii）泵浦光直接耦合到芯中，并且（iii）芯的区域超过约350μm2 < / SUP>。 在一个实施例中，信号光以单个模式传播，并且泵浦光在进入增益产生光纤之前在标准输入光纤中以至少相同的单一模式共同传播，并且模式扩展器设置在 输入光纤和增益光纤。 在另一个实施例中，多个泵耦合到增益产生光纤的芯中。 泵可以产生相同波长或不同波长的光。 根据本发明的具体实施方案，我们已经证明了在核心面积为875mum 2的单包层掺铒光纤中在1545nm处的纳秒光脉冲的放大; 核心由1480nm的高亮度拉曼激光器泵浦; 脉冲具有数百千瓦的峰值功率。

    Systems and methods for fabricating low-loss, high-strength optical fiber transmission lines
    29.
    发明授权
    Systems and methods for fabricating low-loss, high-strength optical fiber transmission lines 有权
    制造低损耗，高强度光纤传输线的系统和方法

    公开(公告)号：US06899470B2

    公开(公告)日：2005-05-31

    申请号：US10197192

    申请日：2002-07-17

    Applicant: David John DiGiovanni ,  Torben E. Veng

    Inventor： David John DiGiovanni ,  Torben E. Veng

    IPC: C03B23/043 ,  C03B37/15 ,  F23D14/40 ,  G02B6/255

    CPC classification number: G02B6/2551 ,  C03B23/043 ,  C03B37/15 ,  F23D14/40

    Abstract: Systems and techniques are described for fabricating a low-loss, high-strength optical transmission line. In one described technique, a first fiber is spliced to a second fiber at a splice point. The spliced fibers are loaded into a heat treatment station, where a gas torch flame is used to thermally treat a splice region including the splice point, with the thermal treatment reducing splice loss between the first and second fibers. While heating the splice region, a dry gas is purged around the torch flame during the heat treatment process to avoid water at the surface of the spliced fibers. According to further described techniques, a purging gas is fed to the torch flame to purge dust particles from the flame, and after the heat treatment has been completed, the torch flame is used to restore the glass surface of the spliced fibers. Additionally described are torch assemblies for fabricating low-loss, high-strength optical fiber transmission lines.

    Abstract translation: 描述了用于制造低损耗高强度光传输线的系统和技术。 在一种所描述的技术中，第一光纤在拼接点处被接合到第二光纤。 接合的纤维被装载到热处理站中，其中使用气体焰炬火焰来热处理包括接合点的接合区域，热处理减少了第一和第二纤维之间的接合损耗。 在加热接合区域的同时，在热处理过程中，在割炬火焰周围清除干燥气体，以避免接合纤维表面的水分。 根据进一步描述的技术，将吹扫气体供给到火炬火焰以从火焰中吹扫灰尘颗粒，并且在热处理完成之后，使用割炬火焰来还原拼接纤维的玻璃表面。 另外描述了用于制造低损耗，高强度光纤传输线的火炬组件。

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