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    OPTICAL FIBER SYSTEMS AND METHODS
    2.
    发明申请
    OPTICAL FIBER SYSTEMS AND METHODS 有权
    光纤系统和方法

    公开(公告)号：US20110103756A1

    公开(公告)日：2011-05-05

    申请号：US12989326

    申请日：2009-02-27

    申请人： Robert R. Rice ,  John Ballato

    发明人： Robert R. Rice ,  John Ballato

    IPC分类号： G02B6/02

    CPC分类号： C03B37/026 ,  C03B37/01205 ,  C03B37/023 ,  C03B37/0235 ,  C03B2203/12 ,  C30B13/00 ,  C30B29/06 ,  C30B29/08 ,  C30B29/40 ,  C30B29/46 ,  C30B29/60 ,  G02B6/02 ,  G02B6/024 ,  H01S3/094007 ,  H01S3/302

    摘要： One embodiment of the invention includes a method for forming an optical fiber. The method comprises providing a preform having a core material and a glass cladding material surrounding the core material. The method also comprises drawing the preform at a temperature that is greater than a melting temperature of the core material to form a drawn fiber. The method further comprises cooling the drawn fiber to form the optical fiber having a crystalline fiber core and a cladding that surrounds the crystalline fiber core and extends axially along a length of the crystalline fiber core.

    摘要翻译： 本发明的一个实施例包括一种形成光纤的方法。 该方法包括提供具有芯材料的预成型件和围绕芯材料的玻璃包覆材料。 该方法还包括在大于芯材料的熔融温度的温度下拉伸预成型件以形成拉伸纤维。 该方法还包括冷却拉伸的纤维以形成具有结晶纤维芯和包层的光纤，该包层围绕结晶纤维芯并且沿着结晶纤维芯的长度轴向延伸。

    Multimode raman fiber device with mode discrimination
    3.
    发明授权
    Multimode raman fiber device with mode discrimination 有权
    多模式拉曼光纤设备，具有模式辨别功能

    公开(公告)号：US07991021B2

    公开(公告)日：2011-08-02

    申请号：US10729261

    申请日：2003-12-05

    申请人： Robert R. Rice ,  Sami Ali Shakir

    发明人： Robert R. Rice ,  Sami Ali Shakir

    IPC分类号： H01S3/30

    CPC分类号： H01S3/067 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/094003 ,  H01S3/094007 ,  H01S3/0941 ,  H01S3/302

    摘要： A multimode optical fiber has a core that includes radially dependent dopant materials to provide a desired refractive index profile and a desired Raman gain coefficient profile. A laser diode pump laser array provides high brightness light that is launched into the fiber and is subject to maximum Raman gain along the optical axis, thereby favoring the lowest order mode of the fiber, discriminating against higher order modes and providing a high brightness, diffraction limited output. The fiber can be incorporated into oscillators, amplifiers and other optical devices.

    摘要翻译： 多模光纤具有包括径向依赖的掺杂剂材料的芯，以提供期望的折射率分布和期望的拉曼增益系数分布。 激光二极管泵浦激光器阵列提供发射到光纤中的高亮度光，并且沿着光轴受到最大拉曼增益，从而有利于光纤的最低阶模式，区分高阶模式并提供高亮度衍射 输出有限。 光纤可以并入振荡器，放大器和其他光学器件中。

    Diffractive method for control of piston error in coherent phased arrays
    5.
    发明授权
    Diffractive method for control of piston error in coherent phased arrays 有权
    用于控制相干相控阵列中活塞误差的衍射方法

    公开(公告)号：US07756169B2

    公开(公告)日：2010-07-13

    申请号：US12009935

    申请日：2008-01-23

    申请人： Peter M. Livingston ,  Robert R. Rice

    发明人： Peter M. Livingston ,  Robert R. Rice

    IPC分类号： H01S3/10

    CPC分类号： H01S3/2383 ,  H01S3/1305 ,  H01S3/1307 ,  H01S3/2316

    摘要： A high-power laser system includes a laser master oscillator, a plurality of fiber laser amplifiers producing intermediate output beamlets, a combiner for combining the intermediate beamlets into a combined output beam, and a piston error controller for minimizing errors related to beam combination that may degrade the quality of the combined output beam. A piston error controller processes a sample of the combined output beam using a Diffractive Optical Element to isolate a signal representing the total piston error of the combined beam. The controller uses amplitude modulation based on Hadamard code words to tag each non-reference intermediate beamlet with a unique code sequence orthogonal to those used for the other beamlets. For each intermediate beamlet, the associated piston error contribution is recovered using a Hadamard decoder. A very small phase dither is also introduced to allow the sign or direction of the piston error to be recovered. The decoded piston error contribution is processed by a cascaded product detector unit to derive a piston error control signal, which is provided to a phase modulator to thereby adjust the phase of a beamlet and minimize the piston error contributed thereby.

    摘要翻译： 高功率激光系统包括激光主振荡器，产生中间输出子束的多个光纤激光放大器，用于将中间子束组合成组合输出光束的组合器以及用于最小化与光束组合相关的误差的活塞误差控制器， 降低组合输出光束的质量。 活塞误差控制器使用衍射光学元件处理组合输出光束的样本，以隔离表示组合光束的总活塞误差的信号。 控制器使用基于Hadamard码字的幅度调制，以与用于其他子束的那些正交的唯一代码序列来标记每个非参考中间子波束。 对于每个中间子束，使用Hadamard解码器恢复相关的活塞误差贡献。 还引入了非常小的相位抖动以允许恢复活塞误差的符号或方向。 解码的活塞误差贡献由级联产品检测器单元处理以得到活塞误差控制信号，其被提供给相位调制器，从而调节子束的相位并使由此贡献的活塞误差最小化。

    Method and system for hybrid coherent and incoherent diffractive beam combining
    6.
    发明授权
    Method and system for hybrid coherent and incoherent diffractive beam combining 有权
    混合相干和非相干衍射光束组合的方法和系统

    公开(公告)号：US07436588B2

    公开(公告)日：2008-10-14

    申请号：US11543596

    申请日：2006-10-05

    申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    IPC分类号： H01S3/00

    CPC分类号： B23K26/0604 ,  B23K26/067 ,  B23K26/705 ,  H01S3/005 ,  H01S3/1307 ,  H01S3/2391

    摘要： A hybrid beam combining system or method combines a plurality of coherent and incoherent light beams into a composite high power diffraction limited beam. N oscillators each transmit light at one of N different wavelengths and each wavelength is split into M constituent beams. M beams in each of N groups are phase locked by a phase modulator using phase correction signals. The phase locked beams are amplified and coupled into an M×N fiber array. Beams emerging from the array are collimated and incident on a diffractive optical element operating as a beam combiner combining the M outputs at each N wavelength into a single beam. The N single beams are incident and spectrally combined on a grating which outputs a composite beam at a nominal 100% fill factor. A low power sample beam, taken from the N beams emerging from the diffractive optical element, is measured for phase deviations from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may include a weak periodic grating for diffracting the low power sample. The diffractive optical element may also be combined with the spectral combining grating into a single optical element.

    摘要翻译： 混合光束组合系统或方法将多个相干和非相干光束组合成复合高功率衍射受限束。 N个振荡器各自以N个不同波长中的一个发射光，并且每个波长被分成M个构成波束。 N组中的每一个的M个波束通过使用相位校正信号的相位调制器锁相。 锁相光束被放大并耦合到MxN光纤阵列中。 从阵列出射的光束被准直并入射在作为将每个N波长处的M个输出组合成单个光束的光束组合器的衍射光学元件上。 N个单个光束入射并光谱地组合在光栅上，该光栅以标称的100％填充因子输出复合光束。 测量从衍射光学元件出射的N个光束取得的低功率采样光束的相位偏差，相位校正信号从该衍射反馈到相位调制器。 衍射光学元件可以包括用于衍射低功率样品的弱周期光栅。 衍射光学元件还可以与光谱组合光栅组合成单个光学元件。

    MULTI-STAGE METHOD AND SYSTEM FOR COHERENT DIFFRACTIVE BEAM COMBINING
    7.
    发明申请
    MULTI-STAGE METHOD AND SYSTEM FOR COHERENT DIFFRACTIVE BEAM COMBINING 有权
    多相差分波束组合的多级方法和系统

    公开(公告)号：US20080085128A1

    公开(公告)日：2008-04-10

    申请号：US11543567

    申请日：2006-10-05

    申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    IPC分类号： H04B10/04

    CPC分类号： G02B27/0087 ,  G02B19/0014 ,  G02B19/0057 ,  G02B27/0944 ,  G02B27/108 ,  G02B27/1093 ,  G02B27/144 ,  G02B27/145 ,  H01S3/005 ,  H01S3/1307 ,  H01S3/2383

    摘要： A system or method coherently combines a large number of light beams at a single wavelength in multiple stages to form a high-power diffraction limited output beam. A two-stage system, or method based thereon, includes a master oscillator transmitting a light beam to a first phase modulation stage, which splits the beam into N beams and locks beam phases using phase correction signals from a first feedback loop. A second phase modulation stage splits each N beam into M beams and locks the phases of M beams in each N group using phase correction signals from a second feedback loop. A two-dimensional fiber array directs M×N beams to a first diffractive optical element combining the beams into N coherent beams of M beams each, and phase correction signals for the second stage are derived from a sample extracted from the N coherent beams. A second diffractive optical element combines the N coherent beams into the output beam, and phase correction signals for the first stage are derived from a sample extracted from the output. The diffractive optical elements may operate as both beam combiners and beam samplers.

    摘要翻译： 系统或方法在多个阶段相干地组合单个波长的大量光束以形成高功率衍射限制输出光束。 基于此的两级系统或方法包括将光束发射到第一相位调制级的主振荡器，该第一相位调制级使用来自第一反馈回路的相位校正信号将光束分成N束并锁定光束相位。 第二相位调制级将每个N波束分成M个波束，并使用来自第二反馈回路的相位校正信号来锁定每个N组中的M个波束的相位。 二维光纤阵列将MxN光束引导到第一衍射光学元件，将第一衍射光学元件组合成每个M束的N个相干光束，并且从从N个相干光束提取的样本中导出第二阶段的相位校正信号。 第二衍射光学元件将N个相干光束组合成输出光束，并且从从输出提取的样本中导出第一阶段的相位校正信号。 衍射光学元件可以作为光束组合器和光束采样器操作。

    METHOD AND SYSTEM FOR HYBRID COHERENT AND INCOHERENT DIFFRACTIVE BEAM COMBINING
    8.
    发明申请
    METHOD AND SYSTEM FOR HYBRID COHERENT AND INCOHERENT DIFFRACTIVE BEAM COMBINING 有权
    混合相干和不饱和衍射光束组合的方法和系统

    公开(公告)号：US20080084605A1

    公开(公告)日：2008-04-10

    申请号：US11543596

    申请日：2006-10-05

    申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    IPC分类号： H01S3/00 ,  H04B10/12

    CPC分类号： B23K26/0604 ,  B23K26/067 ,  B23K26/705 ,  H01S3/005 ,  H01S3/1307 ,  H01S3/2391

    摘要： A hybrid beam combining system or method combines a plurality of coherent and incoherent light beams into a composite high power diffraction limited beam. N oscillators each transmit light at one of N different wavelengths and each wavelength is split into M constituent beams. M beams in each of N groups are phase locked by a phase modulator using phase correction signals. The phase locked beams are amplified and coupled into an M×N fiber array. Beams emerging from the array are collimated and incident on a diffractive optical element operating as a beam combiner combining the M outputs at each N wavelength into a single beam. The N single beams are incident and spectrally combined on a grating which outputs a composite beam at a nominal 100% fill factor. A low power sample beam, taken from the N beams emerging from the diffractive optical element, is measured for phase deviations from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may include a weak periodic grating for diffracting the low power sample. The diffractive optical element may also be combined with the spectral combining grating into a single optical element.

    摘要翻译： 混合光束组合系统或方法将多个相干和非相干光束组合成复合高功率衍射受限束。 N个振荡器各自以N个不同波长中的一个发射光，并且每个波长被分成M个构成波束。 N组中的每一个的M个波束通过使用相位校正信号的相位调制器锁相。 锁相光束被放大并耦合到MxN光纤阵列中。 从阵列出射的光束被准直并入射在作为将每个N波长处的M个输出组合成单个光束的光束组合器的衍射光学元件上。 N个单个光束入射并光谱地组合在光栅上，该光栅以标称的100％填充因子输出复合光束。 测量从衍射光学元件出射的N个光束取得的低功率采样光束的相位偏差，相位校正信号从该衍射反馈到相位调制器。 衍射光学元件可以包括用于衍射低功率样品的弱周期光栅。 衍射光学元件还可以与光谱组合光栅组合成单个光学元件。

    Multi-stage method and system for coherent diffractive beam combining
    9.
    发明授权
    Multi-stage method and system for coherent diffractive beam combining 有权
    用于相干衍射光束组合的多级方法和系统

    公开(公告)号：US07346085B1

    公开(公告)日：2008-03-18

    申请号：US11543567

    申请日：2006-10-05

    申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham

    IPC分类号： H01S3/13

    CPC分类号： G02B27/0087 ,  G02B19/0014 ,  G02B19/0057 ,  G02B27/0944 ,  G02B27/108 ,  G02B27/1093 ,  G02B27/144 ,  G02B27/145 ,  H01S3/005 ,  H01S3/1307 ,  H01S3/2383

    摘要： A system or method coherently combines a large number of light beams at a single wavelength in multiple stages to form a high-power diffraction limited output beam. A two-stage system, or method based thereon, includes a master oscillator transmitting a light beam to a first phase modulation stage, which splits the beam into N beams and locks beam phases using phase correction signals from a first feedback loop. A second phase modulation stage splits each N beam into M beams and locks the phases of M beams in each N group using phase correction signals from a second feedback loop. A two-dimensional fiber array directs M×N beams to a first diffractive optical element combining the beams into N coherent beams of M beams each, and phase correction signals for the second stage are derived from a sample extracted from the N coherent beams. A second diffractive optical element combines the N coherent beams into the output beam, and phase correction signals for the first stage are derived from a sample extracted from the output. The diffractive optical elements may operate as both beam combiners and beam samplers.

    摘要翻译： 系统或方法在多个阶段相干地组合单个波长的大量光束以形成高功率衍射限制输出光束。 基于此的两级系统或方法包括将光束发射到第一相位调制级的主振荡器，该第一相位调制级使用来自第一反馈回路的相位校正信号将光束分成N束并锁定光束相位。 第二相位调制级将每个N波束分成M个波束，并使用来自第二反馈回路的相位校正信号来锁定每个N组中的M个波束的相位。 二维光纤阵列将MxN光束引导到第一衍射光学元件，将第一衍射光学元件组合成每个M束的N个相干光束，并且从从N个相干光束提取的样本中导出第二阶段的相位校正信号。 第二衍射光学元件将N个相干光束组合成输出光束，并且从从输出提取的样本中导出第一阶段的相位校正信号。 衍射光学元件可以作为光束组合器和光束采样器操作。