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。

公开(公告)号：US06707967B2

公开(公告)日：2004-03-16

申请号：US09757386

申请日：2001-01-08

申请人： Joshua E. Rothenberg ,  Hongpu Li ,  Yao Li ,  Jason Zweiback ,  Jan Popelek

发明人： Joshua E. Rothenberg ,  Hongpu Li ,  Yao Li ,  Jason Zweiback ,  Jan Popelek

IPC分类号： G02B634

CPC分类号： G02B6/02085 ,  Y10S359/90

摘要： Techniques for designing efficient gratings with multiple frequency response channels based on sampled patterns based predominantly on phase modulation of the underlying grating structure. Each period of the phase sampled patterns may include contiguous, discrete phase segments with different phase values, or alternatively, a continuous spatial phase pattern that changes the phase of the underlying grating structure. Moderate amplitude modulation of the underlying grating structure by the sampling structure may also be used together with phase modulation. The grating period or the sampling period may be chirped.

摘要翻译： 基于主要基于下面的光栅结构的相位调制的采样图案来设计具有多个频率响应通道的高效光栅的技术。 相位采样图案的每个周期可以包括具有不同相位值的连续的离散相位段，或者替代地，改变下面的光栅结构的相位的连续空间相位图案。 通过采样结构的底层光栅结构的中等幅度调制也可以与相位调制一起使用。 光栅周期或采样周期可以被啁啾。

公开(公告)号：US06532074B1

公开(公告)日：2003-03-11

申请号：US09870925

申请日：2001-05-30

申请人： Russell Wilcox ,  Jason Zweiback ,  HongPu Li ,  Jan Popelek ,  Joshua E. Rothenberg

发明人： Russell Wilcox ,  Jason Zweiback ,  HongPu Li ,  Jan Popelek ,  Joshua E. Rothenberg

IPC分类号： G01B902

CPC分类号： G01M11/00 ,  G02B6/02138 ,  G02B6/124 ,  G02B2006/12107 ,  G02B2006/12173

摘要： Techniques for optically evaluating phase masks for fabricating waveguide Bragg gratings by measuring diffraction orders.

摘要翻译： 通过测量衍射级来光学评估用于制造波导布拉格光栅的相位掩模的技术。

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。

公开(公告)号：US06778733B2

公开(公告)日：2004-08-17

申请号：US09883081

申请日：2001-06-15

申请人： Joshua E. Rothenberg ,  Yunlong Sheng

发明人： Joshua E. Rothenberg ,  Yunlong Sheng

IPC分类号： G02B634

CPC分类号： G03F1/34 ,  G02B6/02138

摘要： The invention provides masks that form fiber Bragg gratings (FBGs) in optical fibers without stitching errors from re-scaling or re-positioning. The invention feathers the pixels of the mask lines by adding, removing, and/or displacing one or more pixels from the edges of the bars and spaces of the mask. The feathering of pixels will affect the FBG being written into the fiber. The feathering operates to shift the effective edge of the bars. This allows the achievement of much finer resolution FBGs than the pixel size of the mask.

摘要翻译： 本发明提供了在光纤中形成光纤布拉格光栅（FBG）的掩模，而没有重新缩放或重新定位的缝合错误。 本发明通过从掩模的条形和空间的边缘添加，去除和/或移位一个或多个像素来羽化掩模线的像素。 像素的羽化将影响FBG被写入光纤。 羽化操作可以改变杆的有效边缘。 这允许实现比掩模的像素大小更精细的分辨率FBG。

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。

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。

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。

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。

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。