公开(公告)号：US4757268A

公开(公告)日：1988-07-12

申请号：US736877

申请日：1985-05-22

申请人： Richard L. Abrams ,  Hans W. Bruesselbach ,  Concetto R. Giuliano ,  Richard C. Lind ,  Monica L. Minden ,  Thomas R. O'Meara ,  David A. Rockwell ,  Ronald R. Stephens

发明人： Richard L. Abrams ,  Hans W. Bruesselbach ,  Concetto R. Giuliano ,  Richard C. Lind ,  Monica L. Minden ,  Thomas R. O'Meara ,  David A. Rockwell ,  Ronald R. Stephens

IPC分类号： H01S3/08 ,  G02F20060101 ,  G02F1/35 ,  H01S3/10 ,  H01S3/23 ,  H01S5/00 ,  H01S3/098 ,  G01C3/08

CPC分类号： H01S3/10076 ,  H01S3/2383 ,  H01S3/2316 ,  H01S3/2333

摘要： A laser apparatus (10) has a coherent master oscillator radiation source (30) for driving a plurality of laser gain elements (20) positioned in a operationally parallel configuration so as to receive unamplified radiation (40) from master oscillator (30) and transmitting amplified radiation (44). Input means (60) couples portion of radiation (40) from master oscillator to each of said gain elements (20). Phase conjugate reflector means (80) operatively coupled to gain elements (20) reflects the phase conjugate of amplified radiation (44) back into the gain elements (20) where it is further amplified. Output coupling means (90) couples amplified radiation from the plurality of gain elements (20) out of the laser apparatus as a single coherent output beam of radiation.

摘要翻译： 激光装置（10）具有相干主振荡器辐射源（30），用于驱动位于操作上并联配置的多个激光增益元件（20），以便从主振荡器（30）接收未放大的辐射（40）并传输 放大辐射（44）。 输入装置（60）将辐射（40）的一部分从主振荡器耦合到每个所述增益元件（20）。 可操作地耦合到增益元件（20）的相位共轭反射器装置（80）将放大的辐射（44）的相位共轭反射回到增益元件（20）中，在增益元件（20）中被进一步放大。 输出耦合装置（90）将来自激光装置的多个增益元件（20）的放大的辐射作为单个相干输出的辐射束耦合。

公开(公告)号：US5048935A

公开(公告)日：1991-09-17

申请号：US947575

申请日：1986-12-24

申请人： Uzi Efron ,  Bernard H. Soffer ,  Richard C. Lind ,  David M. Pepper ,  Thomas R. O'Meara

发明人： Uzi Efron ,  Bernard H. Soffer ,  Richard C. Lind ,  David M. Pepper ,  Thomas R. O'Meara

IPC分类号： G01J9/00 ,  G02B26/06

CPC分类号： G03H1/0005 ,  G01J9/00 ,  G02B26/06 ,  G03H1/2294 ,  G03H2001/0066 ,  G03H2225/32

摘要： Apparatus for compensating for inherent distortions in a modified liquid crystal light valve used in an integrated wavefront sensing and wavefront control system for laser optics. A main wavefront sensing and control system utilizes a liquid crystal light valve selected for response speed but having inherent surface non-linearities. A beam from an auxiliary laser is intermittently applied, while the main laser is blocked, to both the fast response LCLV of the main system and to a slower response LCLV of an associated correction system. The second LCLV system corrects for the non-linearities in the surface of the first LCLV and then maintains the stored correction signal for a decay interval which corresponds to several response times of the main LCLV, thus permitting the main LCLV system to perform fast correction of atmospheric aberrations in the laser beam wavefront unaffected by inherent surface non-linearities.

摘要翻译： 用于补偿在用于激光光学的集成波前感测和波前控制系统中使用的改进的液晶光阀中的固有失真的装置。 主波前感测和控制系统利用了选择响应速度但具有固有表面非线性的液晶光阀。 来自辅助激光器的光束在主激光器被阻挡的同时被间歇地施加到主系统的快速响应LCLV和相关校正系统的较慢响应LCLV。 第二LCLV系统校正第一LCLV的表面中的非线性，然后将存储的校正信号维持在对应于主LCLV的几个响应时间的衰减间隔，从而允许主LCLV系统执行快速校正 激光束波前的大气像差不受固有表面非线性的影响。

公开(公告)号：US4715689A

公开(公告)日：1987-12-29

申请号：US864937

申请日：1986-05-20

申请人： Thomas R. O'Meara ,  Richard C. Lind

发明人： Thomas R. O'Meara ,  Richard C. Lind

IPC分类号： G02B26/06 ,  G02F1/35 ,  G02B5/23 ,  G02F1/01

CPC分类号： G02F1/3538 ,  G02B26/06

摘要： A phase conjugate resonator (PCR) employing at least one phase conjugate mirror (PCM) provides high resolution spatial detection of individual locations in a two-dimensional optical array which exceed or fall below a threshold level. In one embodiment the optical intensity profile under investigation is imposed either onto one or both of the pump beams of a degenerate four-wave mixing PCM. In another embodiment a pair of PCMs are used as the two mirrors forming the PCR, with the pump beams for one PCM modulated and the pump beams for the other PCM serving as a threshold reference. In either case, the spatially modulated optical output may be read out with multiple detectors or an imaging system, or the cumulative area output of the PCR can be read out with a single detector to characterize the intensity profile relative to the threshold.

摘要翻译： 使用至少一个相位共轭反射镜（PCM）的相位共轭谐振器（PCR）提供超过或低于阈值水平的二维光学阵列中的各个位置的高分辨率空间检测。 在一个实施例中，所研究的光强度曲线被施加到简并四波混频PCM的一个或两个泵浦波束上。 在另一个实施例中，使用一对PCM作为形成PCR的两个反射镜，其中用于一个PCM的泵浦光束被调制，另一个PCM的泵浦光束用作阈值参考。 在任一情况下，空间调制的光输出可以用多个检测器或成像系统读出，或者可以用单个检测器读出PCR的累积面积输出，以表征相对于阈值的强度分布。

公开(公告)号：US5717516A

公开(公告)日：1998-02-10

申请号：US825835

申请日：1997-04-04

申请人： Marvin B. Klein ,  David M. Pepper ,  Ronald R. Stephens ,  Thomas R. O'Meara ,  David Welch ,  Robert J. Lang ,  Jack L. Feinberg ,  Stuart MacCormack

发明人： Marvin B. Klein ,  David M. Pepper ,  Ronald R. Stephens ,  Thomas R. O'Meara ,  David Welch ,  Robert J. Lang ,  Jack L. Feinberg ,  Stuart MacCormack

IPC分类号： G02F1/39 ,  H01S3/00 ,  G02B6/26

CPC分类号： G02F1/397

摘要： An optical amplification system directs a diffraction-limited signal beam through a series of approximately 90.degree. crossings with a number of non-diffraction-limited pump beams in a photorefractive medium. All of the beams are s-polarized, resulting in an energy transfer from the pumps to the signal beam while leaving the signal beam diffraction-limited. The photorefractive medium is preferably a series of BaTiO.sub.3 :Rh crystals that receive the pump and signal beams through orthogonal faces, with their C-axes at approximately 45.degree. to both beams. A binary tree optical distribution network is used to minimize waveguide splits in forming a large number of pump beams. The outputs of several amplification modules are combined into a single output beam using adaptive optics, with the outputs from the different modules phase matched to each other by diverting two minor portions of the combined beam, partially overlapping the diverted beams and adjusting the amplification module phases to cancel phase differentials between the overlapped portions. Similarly, sets of combined and phase-matched beams can be combined with each other (again using adaptive optics) to generate still higher powers using a super module approach.

摘要翻译： 光学放大系统通过在光折射介质中的许多非衍射受限的泵浦光束将衍射受限的信号光束引导通过一系列大约90°的交叉。 所有的光束都是s偏振的，从而导致从泵到信号光束的能量传递，同时保持信号光束衍射受限。 光折射介质优选是一系列BaTiO 3：Rh晶体，其通过正交面接收泵浦和信号光束，其C轴与两个波束大约45°。 二叉树光分配网络用于最小化形成大量泵浦波束的波导分裂。 使用自适应光学器件将多个放大模块的输出组合成单个输出光束，来自不同模块的输出通过转移组合光束的两个次要部分相互匹配，部分地与转向光束重叠并且调整放大模块相位 以消除重叠部分之间的相位差。 类似地，组合和相位匹配波束的组可以彼此组合（再次使用自适应光学器件）以使用超级模块方法来产生更高的功率。

公开(公告)号：US5151814A

公开(公告)日：1992-09-29

申请号：US673175

申请日：1991-03-18

申请人： Jan Grinberg ,  Thomas R. O'Meara ,  Yuri Owechko ,  Melvin E. Pedinoff ,  Bernard H. Soffer

发明人： Jan Grinberg ,  Thomas R. O'Meara ,  Yuri Owechko ,  Melvin E. Pedinoff ,  Bernard H. Soffer

IPC分类号： G02F1/1343 ,  G02F1/1347 ,  G02F1/139 ,  G02F1/29

CPC分类号： G02B27/0087 ,  G02F1/292 ,  G02F1/134336 ,  G02F1/1347 ,  G02F1/1393 ,  G02F2203/01 ,  G02F2203/02 ,  G02F2203/24

摘要： An optical beam scanner incorporating an array of beam deflection elements commonly controlled to steer an optical beam impingent on the array is described. The beam steering elements are arranged in the array as individually controlled elements and the deflection of the beam is accomplished by setting the phase tilt and the phase offset of each element according to a calculation which removes modulo 2.pi. phase shift from the required position relative to a flat plane. Thus, the array elements can be thin and need only supply about 2 radians of phase shift. These elements may be incorporated in a planar array using beam deflection elements such as liquid crystal beam deflectors by choosing a drive scheme representing either a blazed array or a flat piston array. Operation may be designed for a large range of light wavelengths and the system may efficiently accommodate a combination of the blazed and flat piston techniques to obtain beam deflection characteristics otherwise unavailable by the exclusive use of each individual technique. By use of the liquid crystal phased array approach, rapid, high accuracy, large area beam deflection is possible without the necessity of any moving parts and with low power drive requirements. Phased arrays of the type described above may be arranged in successive parallel planes with a common beam axis to provide two-dimensional beam deflection.

摘要翻译： 描述了一种光束扫描器，其包括通常被控制以引导照射在阵列上的光束的光束偏转元件阵列。 光束操纵元件作为独立控制的元件布置在阵列中，并且通过根据计算来设置每个元件的相位倾斜和相位偏移来实现光束的偏转，该计算从相对于所需位置移除模2π相移 平面飞机 因此，阵列元件可以是薄的，并且仅需要提供约2弧度的相移。 通过选择表示闪耀阵列或平坦活塞阵列的驱动方案，这些元件可以使用诸如液晶束偏转器的光束偏转元件并入平面阵列中。 操作可以设计用于大范围的光波长，并且系统可以有效地适应闪耀和平坦活塞技术的组合以获得否则不能通过各自独占技术的独占使用而获得光束偏转特性。 通过使用液晶相位阵列方法，可以快速，高精度，大面积的光束偏转，而不需要任何移动部件和低功率驱动要求。 上述类型的相控阵列可以布置在具有共同波束轴的连续平行平面中，以提供二维波束偏转。

公开(公告)号：US5126876A

公开(公告)日：1992-06-30

申请号：US663277

申请日：1991-02-28

申请人： Thomas R. O'Meara

发明人： Thomas R. O'Meara

IPC分类号： H01S3/00 ,  H01S3/10 ,  H01S3/23

CPC分类号： H01S3/2333 ,  H01S3/0064 ,  H01S3/005 ,  H01S3/10076 ,  H01S3/2383

摘要： A master oscillator power amplifier (MOPA) system which isolates the master oscillator (MO) from the return amplified beam by dividing the return beam into two components, introducing a phase shift between the components, and recombining the phase shifted beam components through constructive interference into an output beam directed away from the MO. A destructive interference return output is directed back towards the MO, but is held to a negligible level by making the phase shift approximately equal to an odd number of half-wavelengths at the return beam wavelength. In the preferred embodiment a stimulated Brillouin scattering phase conjugate mirror (PCM) is used to direct the amplified beam for a second amplification pass, while a Mach-Zender interferometer transmits the beam both before and after double amplification. The original beam is replicated after its first path through the interferometer by having the interferometer phase shift also equal an integral number of wavelengths at the input beam wavelength, prior to frequency shifting by the PCM.

公开(公告)号：US4902980A

公开(公告)日：1990-02-20

申请号：US274740

申请日：1988-11-14

申请人： Thomas R. O'Meara

发明人： Thomas R. O'Meara

IPC分类号： H01S3/00 ,  H01S3/083 ,  H01S3/10 ,  H01S3/23

CPC分类号： H01S3/2333 ,  H01S3/0064 ,  H01S3/083 ,  H01S3/10076 ,  H01S3/2316

摘要： An improved phase conjugate master-oscillator power-amplifier laser system for providing a high-power low-distortion laser output beam. The system includes an improved oscillator such as a ring oscillator which rejects any of the output beam which is inadvertently fed back to the oscillator, thereby preventing unwanted oscillation. The system also includes an attenuator such as a spatial filter or an optical isolator that attenuates any amplified spontaneous emissions that may be reflected from the power amplifier to the oscillator, thereby preventing oscillator degradation that would otherwise result. The invention is particularly well-suited for a laser system which employs an SBS mirror for phase conjugation.

摘要翻译： 一种改进的相位共轭主振荡器功率放大器激光系统，用于提供大功率低失真的激光输出光束。 该系统包括改进的振荡器，例如环形振荡器，其拒绝任何不经意地反馈到振荡器的输出光束，从而防止不必要的振荡。 该系统还包括衰减器，例如空间滤波器或光隔离器，其衰减可能从功率放大器反射到振荡器的任何放大的自发发射，从而防止否则将导致的振荡器衰减。 本发明特别适用于采用SBS镜用于相位共轭的激光系统。

公开(公告)号：US4642582A

公开(公告)日：1987-02-10

申请号：US836201

申请日：1986-02-26

申请人： Thomas R. O'Meara

发明人： Thomas R. O'Meara

IPC分类号： G02F1/35 ,  H01S3/30

CPC分类号： G02F1/3534

摘要： Apparatus for encoding and decoding laser pulses, or the like. At least one laser source applied laser energy to a nonlinear material in a manner such that counter-propagating beams are applied to the material. These laser beams are spatially or temporally modulated in a predetermined manner. The modulation may be continuous, or discrete, amplitude or phase modulation. Another laser source provides a probe pulse which traverses the nonlinear material and interacts with the counter-propagating laser beams in a manner known as four-wave mixing. This process generates an encoded laser pulse whose modulation pattern is a function of the modulation of the counter-propagating beams. A decoded laser pulse is obtained by applying the encoded pulse to the apparatus and reversing the modulation of the counter-propagating laser beams.

摘要翻译： 用于对激光脉冲进行编码和解码的装置等。 至少一个激光源将激光能量施加到非线性材料，使得反向传播的光束被施加到材料上。 这些激光束以预定方式进行空间或时间调制。 调制可以是连续的或离散的振幅或相位调制。 另一激光源提供探针脉冲，其穿过非线性材料并以称为四波混频的方式与反向传播的激光束相互作用。 该过程产生编码的激光脉冲，其调制模式是反向传播光束的调制的函数。 通过将编码脉冲施加到装置并反转反向传播的激光束的调制来获得解码的激光脉冲。

公开(公告)号：US3980879A

公开(公告)日：1976-09-14

申请号：US482187

申请日：1974-06-24

申请人： Thomas R. O'Meara

发明人： Thomas R. O'Meara

IPC分类号： G02B26/06 ,  G01J1/20

CPC分类号： G02B26/06

摘要： An adaptive imaging telescope having nonlinear sensing means for detecting an optical image received thereby. The system comprises a phase shifter, positioned at the aperture of the telescope or at an image plane thereof. This system also includes a nonlinear image quality sensor optically coupled to the phase shifter, consisting of a quadrant nonlinear detector wherein each detector element of the quadrant detector is responsive to light from the optical image, the quadrant detector comprising nonlinear photocells or detectors whose plane is positioned at an image plane of the telescope. The photocells are connected to a network for providing image quality error signals. Analog circuits are provided to receive the sensor output and provide a closed-loop return to the phase shifter.

摘要翻译： 一种自适应成像望远镜，具有用于检测由此接收的光学图像的非线性感测装置。 该系统包括位移器，位于望远镜的孔或其图像平面处。 该系统还包括光耦合到移相器的非线性图像质量传感器，其由象限非线性检测器组成，其中象限检测器的每个检测器元件响应于来自光学图像的光，该象限检测器包括非线性光电管或其平面为 位于望远镜的图像平面。 光电池连接到网络以提供图像质量误差信号。 提供模拟电路以接收传感器输出并提供闭环返回到移相器。

公开(公告)号：US07262861B1

公开(公告)日：2007-08-28

申请号：US10852782

申请日：2004-05-24

申请人： David M. Pepper ,  Thomas R. O'Meara

发明人： David M. Pepper ,  Thomas R. O'Meara

IPC分类号： G01B11/02

CPC分类号： G01B17/02 ,  G01B11/06 ,  G01N21/1702 ,  G01N29/043 ,  G01N29/2418 ,  G01N2291/02827 ,  G01N2291/02854 ,  G01N2291/0421

摘要： A laser ultrasonic inspection apparatus and method which enables remote sensing of thickness, hardness, temperature and/or internal defect detection is disclosed. A laser generator impinges a workpiece with light for generating a thermo-elastic acoustic reaction in a workpiece. A probe laser impinges the workpiece with an annularly-shaped probe light for interaction with the acoustic signal in the workpiece resulting in a modulated return beam. A photodetector having a sensitive region for detecting an annularly-shaped fringe pattern generated by an interaction of a reference signal and with the modulated return beam at said sensitive region.

摘要翻译： 公开了能够远程检测厚度，硬度，温度和/或内部缺陷检测的激光超声波检查装置和方法。 激光发生器用工件照射工件以在工件中产生热弹性声反应。 探头激光器用环形探针光照射工件，以与工件中的声信号相互作用，从而产生调制的返回光束。 一种光电检测器，具有用于检测通过参考信号的相互作用产生的环形条状图案的敏感区域和在所述敏感区域处的调制返回光束。