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公开(公告)号：US07468832B2
公开(公告)日：2008-12-23
申请号：US11543677
申请日：2006-10-05
CPC分类号： H01S3/2383 , B23K26/0604 , B23K26/0613 , H01S3/06754 , H01S3/10007
摘要： A system and method for combining plural low power light beams into a coherent high power light beam by means of a diffractive optical element operating as both a beam combiner and beam sampler. An oscillation source transmits a master signal that is split into plural beams propagating at a common wavelength. Each beam is phase locked by a corresponding phase modulator according to a phase correction signal. The beams are directed through a fiber array to the diffractive optical element to allow efficient coherent combination of the beams at a desired diffraction order. The diffractive optical element includes a periodic sampling grating for diffracting a low power sample beam representative of the combined beam. A phase detection stage detects phases of constituent beams in the sample beam from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may be further modified to collimate beams diverging from the fiber array and to focus the sample beam onto a phase detector.
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2.发明申请Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler 有权使用集成衍射光束组合器和采样器的相干光束组合的方法和系统公开(公告)号：US20080084598A1
公开(公告)日：2008-04-10
申请号：US11543677
申请日：2006-10-05
IPC分类号： G02F1/01
CPC分类号： H01S3/2383 , B23K26/0604 , B23K26/0613 , H01S3/06754 , H01S3/10007
摘要： A system and method for combining plural low power light beams into a coherent high power light beam by means of a diffractive optical element operating as both a beam combiner and beam sampler. An oscillation source transmits a master signal that is split into plural beams propagating at a common wavelength. Each beam is phase locked by a corresponding phase modulator according to a phase correction signal. The beams are directed through a fiber array to the diffractive optical element to allow efficient coherent combination of the beams at a desired diffraction order. The diffractive optical element includes a periodic sampling grating for diffracting a low power sample beam representative of the combined beam. A phase detection stage detects phases of constituent beams in the sample beam from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may be further modified to collimate beams diverging from the fiber array and to focus the sample beam onto a phase detector.
摘要翻译： 一种通过用作光束组合器和光束取样器的衍射光学元件将多个低功率光束组合成相干高功率光束的系统和方法。 振荡源发送分割成以公共波长传播的多个波束的主信号。 每个光束根据相位校正信号由相应的相位调制器锁相。 光束通过光纤阵列引导到衍射光学元件，以允许以期望的衍射级别的光束的有效相干组合。 衍射光学元件包括用于衍射代表组合光束的低功率采样光束的周期性采样光栅。 相位检测级检测相位校正信号从中得到的采样光束中的构成光束的相位，并将其反馈到相位调制器。 可以进一步修改衍射光学元件以准直从光纤阵列发散的光束并将样品光束聚焦到相位检测器上。
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公开(公告)号：US07065110B2
公开(公告)日：2006-06-20
申请号：US10761723
申请日：2004-01-20
申请人： Robert R. Rice , Michael G. Wickham , Eric C. T. Cheung , Hiroshi Komine , Joshua E. Rothenberg
发明人： Robert R. Rice , Michael G. Wickham , Eric C. T. Cheung , Hiroshi Komine , Joshua E. Rothenberg
IPC分类号： H01S3/10
CPC分类号： H01S3/1083 , G02F1/3534 , H01S3/06754 , H01S3/10015 , H01S3/10023 , H01S3/2383
摘要： A laser array architecture scalable to very high powers by fiber amplifiers, but in which the output wavelength is selectable, and not restricted by the wavelengths usually inherent in the choice of fiber materials. A pump beam at a first frequency is amplified in the fiber amplifier array and is mixed with a secondary beam at a second frequency to yield a frequency difference signal from each of an array of optical parametric amplifiers. A phase detection and correction system maintains the array of outputs from the amplifiers in phase coherency, resulting in a high power output at the desired wavelength. A degenerate form of the architecture is disclosed in an alternate embodiment, and a third embodiment employs dual wavelength fiber amplifiers to obtain an output at a desired difference frequency.
摘要翻译： 激光阵列架构由光纤放大器可扩展到非常高的功率，但其中输出波长是可选择的，而不受通常选择光纤材料固有的波长的限制。 第一频率的泵浦光束在光纤放大器阵列中被放大，并且以第二频率与次级光束混合，以产生来自光学参量放大器阵列中的每一个的频差信号。 相位检测和校正系统保持来自放大器的输出阵列的相位一致性，导致在所需波长处的高功率输出。 在替代实施例中公开了该架构的简并形式，并且第三实施例采用双波长光纤放大器以期望的差频获得输出。
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公开(公告)号：US07120175B2
公开(公告)日：2006-10-10
申请号：US10761747
申请日：2004-01-20
申请人： Joshua E. Rothenberg , Eric C. T. Cheung , Hiroshi Komine , Robert R. Rice , Michael G. Wickham
发明人： Joshua E. Rothenberg , Eric C. T. Cheung , Hiroshi Komine , Robert R. Rice , Michael G. Wickham
IPC分类号： H01S3/10
CPC分类号： H01S5/14 , G02F1/37 , H01S3/06754 , H01S3/2383
摘要： A laser array architecture scalable to very high powers by closely stacking fiber amplifiers, but in which the output wavelength is selectable to be in the visible or ultraviolet region, without being restricted by the wavelengths usually inherent in the choice of fiber materials. A pump signal at a fundamental frequency is amplified in the fiber amplifier array and input to an array of nonlinear crystals that function as harmonic generators, producing an output array at a desired harmonic of the fundamental frequency. A phase detection and correction system maintains the array of outputs in phase coherency, resulting in a high power output with high beam quality, at the desired frequency. The array of nonlinear crystals may a single array to produce a second harmonic output frequency, or a combination of multiple cascaded arrays configured to produce a selected higher order harmonic frequency.
摘要翻译： 通过紧密地堆叠光纤放大器，但其中输出波长可选择在可见光或紫外区域的激光阵列结构可以扩展到非常高的功率，而不受光纤材料选择中通常固有的波长的限制。 基频的泵浦信号在光纤放大器阵列中被放大并输入到作为谐波发生器的非线性晶体阵列，产生基频的期望谐波的输出阵列。 相位检测和校正系统维持相位一致性的输出阵列，从而产生具有所需频率的高光束质量的高功率输出。 非线性晶体阵列可以是单个阵列以产生二次谐波输出频率，或者被配置为产生选定的较高次谐波频率的多个级联阵列的组合。
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5.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
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。
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公开(公告)号：US20080085128A1
公开(公告)日：2008-04-10
申请号：US11543567
申请日：2006-10-05
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。
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7.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
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。
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公开(公告)号：US07346085B1
公开(公告)日：2008-03-18
申请号：US11543567
申请日：2006-10-05
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。
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9.发明授权Method and system for diffractive beam combining using DOE combiner with passive phase control 有权使用DOE组合器与被动相位控制的衍射光束组合的方法和系统公开(公告)号：US07339727B1
公开(公告)日：2008-03-04
申请号：US11543613
申请日：2006-10-05
IPC分类号： H01S3/00
CPC分类号： H01S3/06791 , H01S3/0805 , H01S3/0812 , H01S3/10053 , H01S3/2383
摘要： A system and method for combining plural low power light beams into a coherent high power light beam. Optical amplifiers transmit a plurality of light beams propagating at a common wavelength through an array of optical fiber emitters. Each constituent beam is emitted from the array at a different propagation angle, collimated, and incident on a diffractive optical element operating as a beam combiner such that incident beams when properly phased and located are combined into a coherent beam at a desired diffraction order. A beam splitter or a periodic sampling grating on the diffractive optical element directs a low power sample beam to a spatial filter passing resonant mode output back to the optical amplifiers in a ring laser configuration thereby passively synchronizing phases of the constituent beams to maximize combination efficiency of the coherent beam.
摘要翻译： 一种用于将多个低功率光束组合成相干高功率光束的系统和方法。 光放大器通过光纤发射器阵列发射以公共波长传播的多个光束。 每个构成光束以阵列的不同传播角发射，准直并入射在作为光束组合器工作的衍射光学元件上，使得入射光束在适当地定相并定位时，以期望的衍射级组合成相干光束。 衍射光学元件上的分束器或周期性采样光栅将低功率采样光束引导到以环形激光器配置将谐振模式输出回到光放大器的空间滤波器，从而被动地同步构成光束的相位，以最大化组合效率 相干光束。
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公开(公告)号：US08254017B2
公开(公告)日：2012-08-28
申请号：US12407470
申请日：2009-03-19
申请人： Robert R. Rice , Michael G. Wickham , Hiroshi Komine , Peter Livingston , Peter Thielen , Charles Phillip Asman
发明人： Robert R. Rice , Michael G. Wickham , Hiroshi Komine , Peter Livingston , Peter Thielen , Charles Phillip Asman
IPC分类号： C03B37/016 , C03B37/075 , H04B10/17
CPC分类号： H01S3/06716 , C03B37/01211 , C03B37/01413 , C03B37/016 , C03B37/02763 , C03B2201/08 , C03B2201/28 , C03B2201/31 , C03B2201/32 , C03B2201/42 , C03B2203/18 , G02B6/028 , H01S3/0672 , H01S3/06729 , H01S3/09415 , H01S2301/03
摘要： A method is provided for forming an optical fiber amplifier. The method comprises providing a composite preform having a gain material core that includes one or more acoustic velocity varying dopants to provide a longitudinally varying acoustic velocity profile along the gain material core to suppress Stimulated Brillouin Scattering (SBS) effects by raising the SBS threshold and drawing the composite preform to form the optical fiber amplifier.
摘要翻译： 提供一种用于形成光纤放大器的方法。 该方法包括提供具有增益材料芯的复合预制件，增益材料芯包括一个或多个声速变化掺杂剂，以沿着增益材料芯提供纵向变化的声速分布，以通过提高SBS阈值和绘制来抑制受激布里渊散射（SBS）效应 复合预成型件形成光纤放大器。
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