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1. 发明授权

US08995049B2 Method and apparatus for suppression of stimulated brillouin scattering using polarization control with a birefringent delay element 有权
标题翻译：使用具有双折射延迟元件的偏振控制来抑制受激布里渊散射的方法和装置
公开(公告)号：US08995049B2
公开(公告)日：2015-03-31
申请号：US13227640
申请日：2011-09-08
申请人： Joshua E. Rothenberg
发明人： Joshua E. Rothenberg
IPC分类号： H01S3/13 , H01S3/067 , H01S3/08 , H01S3/23
CPC分类号： H01S3/1308 , H01S3/06712 , H01S3/06754 , H01S3/08054 , H01S3/1307 , H01S3/2383 , H01S2301/03
摘要： A method and apparatus for suppression of stimulated Brillouin scattering (SBS) includes a master oscillator (MO) that generates a beam; a birefringent element that receives and transmits the beam, wherein the beam is transmitted with a transmission delay between two orthogonal axes; a polarization controller that receives the beam and transmits the beam with a desired polarization; a fiber amplifier that receives the beam, amplifies the beam, and transmits a beam; a compensating birefringent element that receives the beam, approximately removes the transmission delay between the two axes of the beam, and transmits an output beam; and a polarization detector that detects the output beam's polarization and provides feedback to the polarization controller to ensure that the polarization of the output beam is approximately equal to a desired output polarization, so as to reduce SBS.
摘要翻译：用于抑制受激布里渊散射（SBS）的方法和装置包括产生光束的主振荡器（MO）; 接收和发送光束的双折射元件，其中所述光束以两个正交轴之间的传输延迟传输; 偏振控制器，其接收所述光束并以期望的偏振透射所述光束; 接收光束的光纤放大器，放大光束并透射光束; 接收光束的补偿双折射元件大致去除了光束的两个轴之间的传输延迟，并且传输输出光束; 以及偏振检测器，其检测输出光束的偏振并向偏振控制器提供反馈以确保输出光束的偏振近似等于期望的输出偏振，以便减小SBS。

2. 发明授权

US07336363B2 Interferometric beam combination 有权
标题翻译：干涉光束组合
公开(公告)号：US07336363B2
公开(公告)日：2008-02-26
申请号：US11256282
申请日：2005-10-19
申请人： Joshua E. Rothenberg
发明人： Joshua E. Rothenberg
IPC分类号： G01B9/02
CPC分类号： H01S3/06754 , B23K26/0613 , B23K26/705 , H01S3/1301 , H01S3/1307 , H01S3/2383
摘要： A method for combining beams from multiple laser emitters, which may be optical fibers or bulk amplifiers, to form a composite output beam with desirable beam characteristics, as measured, for example, by Strehl ratio. Beams from the multiple emitters are interferometrically combined in the near field, and the phases of the beams are controlled to provide optimal phase coherence, and thereby to minimize losses. Various techniques are disclosed for controlling the phase angles of the emitted beams, using either a separate phase detector for each emitter beam, or a single detector for the composite output beam, or nulling detectors in spurious outputs from the beam combining optics. All of these techniques achieve an improvement in Strehl, largely because the interferometric combination of beams is independent of the array fill factor.
摘要翻译：用于组合来自多个激光发射器的光束的方法，其可以是光纤或体放大器，以形成具有期望的光束特性的复合输出光束，例如通过Strehl比测量。来自多个发射器的光束在近场中被干涉地组合，并且控制光束的相位以提供最佳相位相干性，从而使损耗最小化。公开了各种技术，用于使用用于每个发射器束的单独的相位检测器或用于复合输出光束的单个检测器或来自光束组合光学器件的伪输出中的归零检测器来控制发射的光束的相位角。所有这些技术在Strehl实现了改进，主要是因为光束的干涉组合与阵列填充因子无关。

3. 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。

4. 发明授权

US06833954B2 Lithographic method for manufacturing a mask used in the fabrication of a fiber Bragg grating 有权
标题翻译：用于制造用于制造光纤布拉格光栅的掩模的平版印刷方法
公开(公告)号：US06833954B2
公开(公告)日：2004-12-21
申请号：US09957443
申请日：2001-09-18
申请人： Jason Zweiback , Joshua E. Rothenberg , Jan Popelek , Roger F. Caldwell
发明人： Jason Zweiback , Joshua E. Rothenberg , Jan Popelek , Roger F. Caldwell
IPC分类号： G02B518
CPC分类号： G02B6/02138
摘要： The invention reduces the effects of stitching errors from re-scaling or re-positioning in the fabrication of fiber Bragg gratings or the mask used in such fabrication. A first embodiment of the invention preferably uses characteristics of stitching errors to compensate for the stitching errors themselves. By increasing the number of stitching errors, errors caused by the stitching errors can be reduced. A second embodiment uses continuous writing of the desired pattern, wherein the desired pattern is snapped to a grid that can be written by the fabrication equipment. Using continuous writing eliminates stitching errors in the resulting gratings.
摘要翻译：本发明减少了在制造光纤布拉格光栅或在这种制造中使用的掩模的重新缩放或重新定位时缝合误差的影响。本发明的第一实施例优选地使用缝合误差的特征来补偿缝合错误本身。通过增加缝合错误的数量，可以减少由缝合误差引起的误差。第二实施例使用期望图案的连续写入，其中期望的图案被卡扣到可由制造设备写入的格栅。使用连续写入可消除所得到的光栅中的缝合误差。

5. 发明授权

US09735537B1 Hybrid spectral and coherent beam combiner utilizing 1D fiber arrays 有权
公开(公告)号：US09735537B1
公开(公告)日：2017-08-15
申请号：US15097043
申请日：2016-04-12
申请人： Joshua E. Rothenberg , Eric C. Cheung , Gregory D. Goodno
发明人： Joshua E. Rothenberg , Eric C. Cheung , Gregory D. Goodno
IPC分类号： G02F1/01 , H04B10/25 , H01S3/23 , H01S3/00 , G02B27/30 , H01S3/10 , G02B27/10 , G02B27/09 , G02B27/00 , H01S3/13
CPC分类号： H01S3/2391 , G02B27/0037 , G02B27/0927 , G02B27/1006 , G02B27/1086 , G02B27/30 , H01S3/005 , H01S3/0085 , H01S3/06754 , H01S3/1003 , H01S3/1307
摘要： A system includes N master oscillators to generate N master oscillator driving signals. The system includes N splitters to split each of the N master oscillator signals into M coherent signals with M being a positive integer greater than one. A modulator and fiber amplifier stage adjusts the relative phases of the M coherent signals and generates M×N amplified signals. The M×N amplified signals are aggregated into M clusters of N fibers. The system includes M spectral beam combination (SBC) modules to combine each of the M clusters. Each SBC module combines the M×N amplified signals at N wavelengths and generates M tiled output beams. Each SBC module employs a single dimensional (1D) fiber optic array to transmit one cluster of N amplified signals from the M signal clusters and generates one tiled output beam of the M tiled output beams.

6. 发明授权

US07486852B2 Apparatus and method for suppression of stimulated brillouin scattering in an optical fiber 有权
标题翻译：用于抑制光纤中受激布里渊散射的装置和方法
公开(公告)号：US07486852B2
公开(公告)日：2009-02-03
申请号：US11186480
申请日：2005-07-20
申请人： Joshua E. Rothenberg
发明人： Joshua E. Rothenberg
IPC分类号： G02B6/26 , G02B6/42
CPC分类号： G02B6/022
摘要： A technique for suppressing stimulated Brillouin scattering (SBS) in fibers intended to handle high powers. A fiber is embedded in an elongated embedding material to form an embedded fiber structure. The embedded fiber structure is formed either as a cantilevered beam or as one or more turns around a circular or elliptical path, and then the entire structure is deformed to apply a desired strain that varies along the fiber length and results in suppression of SBS. In one embodiment, the embedded fiber structure is deformed by applying lateral and generally diametric force across the turns of the structure, resulting in changes to its curvature. In another embodiment the embedded fiber structure initially has a helical shape, which is deformed by stretching or twisting to change its radius. In either embodiment, a desired strain profile is obtained by selecting the position of the fiber with respect to a neutral axis.
摘要翻译：用于抑制用于处理高功率的纤维中受激布里渊散射（SBS）的技术。将纤维嵌入细长的嵌入材料中以形成嵌入的纤维结构。嵌入式光纤结构形成为悬臂梁或围绕圆形或椭圆形路径的一个或多个匝，然后整个结构变形以施加沿着光纤长度变化的期望应变并导致SBS的抑制。在一个实施例中，嵌入的纤维结构通过在结构的匝上施加横向和大体直径的力而变形，导致其曲率的变化。在另一个实施例中，嵌入式光纤结构最初具有螺旋形状，其通过拉伸或扭转而变形以改变其半径。在任一实施例中，通过选择纤维相对于中性轴的位置来获得期望的应变分布。

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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