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1. 发明授权

US07120175B2 Scalable harmonic laser source and method 有权
标题翻译：可扩展谐波激光源和方法
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。

2. 发明授权

US07065110B2 Scalable wavelength shifted laser source and method 有权
标题翻译：可扩展的波长偏移激光源和方法
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。

3. 发明申请

US20080084598A1 Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler 有权
$Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler$
标题翻译：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
申请人： Joshua E. Rothenberg , Robert R. Rice , Michael G. Wickham , Hiroshi Komine
发明人： Joshua E. Rothenberg , Robert R. Rice , Michael G. Wickham , Hiroshi Komine
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。

4. 发明授权

US07468832B2 Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler 有权
$Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler$
公开(公告)号：US07468832B2
公开(公告)日：2008-12-23
申请号：US11543677
申请日：2006-10-05
申请人： Joshua E. Rothenberg , Robert R. Rice , Michael G. Wickham , Hiroshi Komine
发明人： Joshua E. Rothenberg , Robert R. Rice , Michael G. Wickham , Hiroshi Komine
IPC分类号： H04B10/17 , G01B9/00
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.

5. 发明授权

US07339727B1 Method and system for diffractive beam combining using DOE combiner with passive phase control 有权
$Method and system for diffractive beam combining using DOE combiner with passive phase control$
标题翻译：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
申请人： Joshua E. Rothenberg , Robert R. Rice , Sami A. Shakir , Michael G. Wickham
发明人： Joshua E. Rothenberg , Robert R. Rice , Sami A. Shakir , Michael G. Wickham
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。

6. 发明申请

US20080037028A1 Pulsed coherent fiber array and method 有权
标题翻译：脉冲相干光纤阵列及方法
公开(公告)号：US20080037028A1
公开(公告)日：2008-02-14
申请号：US11500661
申请日：2006-08-08
申请人： Eric C. T. Cheung , Robert R. Rice , Michael G. Wickham , Mark E. Weber
发明人： Eric C. T. Cheung , Robert R. Rice , Michael G. Wickham , Mark E. Weber
IPC分类号： G01B9/02
CPC分类号： H01S3/2383 , G01J9/00 , H01S3/0085 , H01S3/06754 , H01S3/09415 , H01S3/10015 , H01S3/10053
摘要： A pulsed coherent fiber array laser system that includes a beam generating sub-system that provides a signal pulse beam having pulses of the desired duration that is split into several fiber channels. Optical leakage between the pulses in each split beam is measured and locked to a reference beam by a phase sensing circuit and phase adjusters so that the phase of each fiber pulsed beam is aligned with the phase of the reference beam. A pulse clipper or filter is employed to remove the pulses in the fiber beams so that they do not saturate the phase sensing circuit. The beam generating sub-system can employ any suitable combination of devices to generate the signal beam and the reference beam, including continuous wave master oscillators, amplitude modulators, frequency shifters, injection seed oscillators, Q-switched lasers, reference oscillators, frequency lockers, wavelength division multiplexers, time gated switches, etc.
摘要翻译：一种脉冲相干光纤阵列激光系统，其包括光束产生子系统，其提供具有被分割成若干光纤通道的期望持续时间的脉冲的信号脉冲光束。通过相位检测电路和相位调整器测量每个分束中的脉冲之间的光学泄漏并将其锁定到参考光束，使得每个光纤脉冲光束的相位与参考光束的相位对准。使用脉冲削波器或滤波器来去除光纤束中的脉冲，使得它们不会使相位感测电路饱和。光束产生子系统可以采用任何合适的设备组合来产生信号光束和参考光束，包括连续波主振荡器，幅度调制器，移相器，注入种子振荡器，Q开关激光器，参考振荡器，频率锁存器，波分复用器，时间门控开关等

7. 发明授权

US07436588B2 Method and system for hybrid coherent and incoherent diffractive beam combining 有权
$Method and system for hybrid coherent and incoherent diffractive beam combining$
标题翻译：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。

8. 发明申请

US20080085128A1 MULTI-STAGE METHOD AND SYSTEM FOR COHERENT DIFFRACTIVE BEAM COMBINING 有权
标题翻译：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。

9. 发明申请

US20080084605A1 METHOD AND SYSTEM FOR HYBRID COHERENT AND INCOHERENT DIFFRACTIVE BEAM COMBINING 有权
标题翻译：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。

10. 发明授权

US07346085B1 Multi-stage method and system for coherent diffractive beam combining 有权
$Multi-stage method and system for coherent diffractive beam combining$
标题翻译：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。

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