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1. 发明授权

US08493650B2 Method and apparatus for suppression of four-wave mixing using polarization control with a high power polarization maintaining fiber amplifier system 有权
标题翻译：用于利用具有高功率偏振维持光纤放大器系统的偏振控制来抑制四波混频的方法和装置
公开(公告)号：US08493650B2
公开(公告)日：2013-07-23
申请号：US13351654
申请日：2012-01-17
申请人： Joshua E. Rothenberg , Peter A. Thielen
发明人： Joshua E. Rothenberg , Peter A. Thielen
IPC分类号： H04B10/22
CPC分类号： H01S3/06712 , H01S3/1308 , H01S3/2316 , H01S3/2391 , H01S2301/03
摘要： A method and apparatus for suppression of four-wave mixing using polarization control with a high power polarization maintaining fiber amplifier system. The apparatus includes a master oscillator (MO) that generates a beam; a polarization controller that receives the beam from the MO and transmits the beam with a desired polarization; a pre-amplifier that receives the beam from the polarization controller, pre-amplifies the beam, and transmits the beam; a high power fiber amplifier that receives the beam from the pre-amplifier, amplifies the beam, and transmits an output beam; and a polarization detector that detects the polarization of the output beam. The polarization detector transmits feedback to the polarization controller to ensure that the output beam components aligned with the principal birefringent axes of the high power fiber amplifier have approximately equal power.
摘要翻译：一种使用具有高功率偏振保持光纤放大器系统的偏振控制来抑制四波混频的方法和装置。该装置包括产生光束的主振荡器（MO）; 偏振控制器，其从所述MO接收所述光束并以期望的偏振透射所述光束; 接收来自偏振控制器的光束的前置放大器预放大光束并传输光束; 接收来自前置放大器的光束的高功率光纤放大器，放大光束并传输输出光束; 以及偏振检测器，其检测输出光束的偏振。偏振检测器将反馈传输到偏振控制器，以确保与大功率光纤放大器的主双折射轴对准的输出光束分量具有近似相等的功率。

2. 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。

3. 发明授权

US07280571B2 Scalable zig-zag laser amplifier 有权
标题翻译：可扩展的Z字形激光放大器
公开(公告)号：US07280571B2
公开(公告)日：2007-10-09
申请号：US10997415
申请日：2004-11-23
申请人： Joshua E. Rothenberg
发明人： Joshua E. Rothenberg
IPC分类号： H01S3/04
CPC分类号： H01S3/0941 , H01S3/0606 , H01S3/063 , H01S3/08095 , H01S3/2308 , H01S3/2333 , H01S3/2341 , H01S3/2383 , H01S2301/02
摘要： A solid state laser amplifier architecture in which multiple zig-zag slab laser amplifiers (50) are stacked together, side-pumped using a common pump source (52, 54), and cooled with a common cooling system. The stack of zig-zag slabs (50) produces an array of sub-beams (62) that can be combined coherently into a single composite output beam. Variations in pump power absorption through the stack are mitigated by selection of doping levels for the slabs (50). The composite output beam is sufficiently symmetrical to be directed through conventional optics of circular cross section. Multiple stacks may be arranged in a two-dimensional array to obtain even higher output powers.
摘要翻译：一种固态激光放大器架构，其中多个锯齿形平板激光放大器（50）堆叠在一起，使用公共泵浦源（52,54）进行侧泵抽并用公共冷却系统冷却。之字形板（50）堆叠产生可以相干地组合成单个复合输出光束的子光束（62）的阵列。通过对板坯（50）的掺杂水平的选择来减轻通过堆叠的泵浦功率吸收的变化。复合输出光束是足够对称的，可以通过圆形横截面的常规光学元件。多个堆叠可以被布置成二维阵列以获得更高的输出功率。

4. 发明授权

US06654521B2 Diffraction compensation of FBG phase masks for multi-channel sampling applications 有权
$Diffraction compensation of FBG phase masks for multi-channel sampling applications$
标题翻译：用于多通道采样应用的FBG相位掩模的衍射补偿
公开(公告)号：US06654521B2
公开(公告)日：2003-11-25
申请号：US10056575
申请日：2002-01-23
申请人： Yunlong Sheng , Joshua E. Rothenberg , HongPu Li , Ying Wang , Jason Zweiback
发明人： Yunlong Sheng , Joshua E. Rothenberg , HongPu Li , Ying Wang , Jason Zweiback
IPC分类号： G02B634
CPC分类号： G02B6/02085 , G02B6/02138
摘要： The present invention is directed to a system and method for designing efficient multi-channel FBG gratings using a pre-compensated phase mask for diffracting light for side-writing the grating on an optical fiber core. A desired phase function of the FBG is generated, specifically tailored to an effective spacing between the phase mask and the optical fiber core. From the phase function a phase mask is pre-compensated to offset diffraction effects associated with each longitudinal position of the FBG receiving light from two corresponding longitudinal positions of the phase mask substantially symmetrically spaced longitudinally relative to each particular longitudinal position of the FBG. The two corresponding longitudinal positions of the phase mask are spaced longitudinally from each other by a spacing determined by the effective spacing between the phase mask and fiber core and by the first order diffraction angle of light through the phase mask.
摘要翻译：本发明涉及一种用于使用预补偿相位掩模设计有效的多通道FBG光栅的系统和方法，用于衍射光以在光纤芯上侧写光栅。产生FBG的期望相位函数，专门针对相位掩模和光纤芯之间的有效间隔。从相位函数中，相位掩模被预补偿以抵消与FBG的每个纵向位置相关联的衍射效应，所述FBG接收来自相位掩模的两个相应纵向位置的光，其相对于FBG的每个特定纵向位置基本对称地间隔开。相位掩模的两个对应的纵向位置彼此纵向间隔由相位掩模和光纤芯之间的有效间隔确定的间隔以及通过相位掩模的一阶衍射光角。

5. 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。

6. 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。

7. 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。

8. 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。

9. 发明申请

US20120188626A1 METHOD AND APPARATUS FOR SUPPRESSION OF FOUR-WAVE MIXING USING POLARIZATION CONTROL WITH A HIGH POWER POLARIZATION MAINTAINING FIBER AMPLIFIER SYSTEM 有权
标题翻译：使用偏振控制抑制四波混频的方法和装置与维持光纤放大器系统的高功率极化
公开(公告)号：US20120188626A1
公开(公告)日：2012-07-26
申请号：US13351654
申请日：2012-01-17
申请人： Joshua E. Rothenberg , Peter A. Thielen
发明人： Joshua E. Rothenberg , Peter A. Thielen
IPC分类号： H01S3/067 , H01S3/30 , G02B26/00 , H01S3/13
CPC分类号： H01S3/06712 , H01S3/1308 , H01S3/2316 , H01S3/2391 , H01S2301/03
摘要： A method and apparatus for suppression of four-wave mixing using polarization control with a high power polarization maintaining fiber amplifier system. The apparatus includes a master oscillator (MO) that generates a beam; a polarization controller that receives the beam from the MO and transmits the beam with a desired polarization; a pre-amplifier that receives the beam from the polarization controller, pre-amplifies the beam, and transmits the beam; a high power fiber amplifier that receives the beam from the pre-amplifier, amplifies the beam, and transmits an output beam; and a polarization detector that detects the polarization of the output beam. The polarization detector transmits feedback to the polarization controller to ensure that the output beam components aligned with the principal birefringent axes of the high power fiber amplifier have approximately equal power.
摘要翻译：一种使用具有高功率偏振保持光纤放大器系统的偏振控制来抑制四波混频的方法和装置。该装置包括产生光束的主振荡器（MO）; 偏振控制器，其从所述MO接收所述光束并以期望的偏振透射所述光束; 接收来自偏振控制器的光束的前置放大器预放大光束并传输光束; 接收来自前置放大器的光束的高功率光纤放大器，放大光束并传输输出光束; 以及偏振检测器，其检测输出光束的偏振。偏振检测器将反馈传输到偏振控制器，以确保与大功率光纤放大器的主双折射轴对准的输出光束分量具有近似相等的功率。

10. 发明授权

US07539224B2 Scalable zig-zag laser amplifier 有权
标题翻译：可扩展的Z字形激光放大器
公开(公告)号：US07539224B2
公开(公告)日：2009-05-26
申请号：US11895571
申请日：2007-08-24
申请人： Joshua E. Rothenberg
发明人： Joshua E. Rothenberg
IPC分类号： H01S3/04
CPC分类号： H01S3/0941 , H01S3/0606 , H01S3/063 , H01S3/08095 , H01S3/2308 , H01S3/2333 , H01S3/2341 , H01S3/2383 , H01S2301/02
摘要： A high power laser system is provided having a master oscillator for generating a reference laser beam of desired beam quality, means for dividing the reference beam into multiple sub-beams, a multi-slab gain module positioned to receive the multiple sub-beams as input beams, and means for adjusting the sub-beams in phase to allow the output sub-beams to be coherently combined as a single composite output beam. Optionally, additional multi-slab gain modules similar to the first multi-slab gain module may be positioned to receive amplified output sub-beams from the first multi-slab gain module. The additional multi-slab gain modules generate further amplified output sub-beams of high aggregate power.
摘要翻译：提供了一种高功率激光系统，其具有用于产生所需光束质量的参考激光束的主振荡器，用于将参考光束分成多个子光束的装置，多平板增益模块，定位成接收多个子光束作为输入光束，以及用于相位调整子光束以使输出子光束相干地组合为单个复合输出光束的装置。可选地，可以将类似于第一多板增益模块的附加多板增益模块定位成从第一多板增益模块接收放大的输出子光束。附加的多板增益模块产生具有高聚集功率的进一步放大的输出子光束。

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