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11. 发明授权

US6075603A Contactless acoustic sensing system with detector array scanning and self-calibrating 失效
标题翻译：具有检测器阵列扫描和自校准的非接触式声学传感系统
公开(公告)号：US6075603A
公开(公告)日：2000-06-13
申请号：US848929
申请日：1997-05-01
申请人： Thomas R. O'Meara , David M. Pepper
发明人： Thomas R. O'Meara , David M. Pepper
IPC分类号： G01D5/26 , G01H9/00 , G01B9/02
CPC分类号： G01D5/26 , G01D5/266 , G01H9/00 , G01N29/2418
摘要： A contactless system for imaging an acoustic source within a workpiece directs a preferably annular optical probe beam pattern onto the vibrating workpiece surface, with the vibrationally modulated beam then detected by an array of preferably non-steady-state photo-emf detectors arranged in a similar pattern. The probe beam is scanned over the vibrating surface, either mechanically or through an electronically simulated phased array scheme. Time gating is used to suppress unwanted side-lobes when the individual detector outputs are summed over an appreciable waveband. A self-calibration scheme is also preferably used that provides a quantitative as well as qualitative output. A calibration modulation is imposed on at least one of the probe and reference beams, with the calibration modulation later removed at a post-detector stage and used to normalize the acoustic modulation output. Variations of the self-calibration scheme include reference-beam and time-delay interferometers based upon a calibrating phase modulation, and a photon flux measurement approach based upon a calibrating amplitude modulation.
摘要翻译：用于对工件内的声源进行成像的非接触式系统将优选环形的光学探针光束图案引导到振动的工件表面上，然后通过优选非稳态光电检测器的阵列检测振动调制的光束，其布置在类似的模式。探测光束在机械上或通过电子模拟相控阵列方案在振动表面上扫描。当各个检测器输出相加在可观的波段上时，时间门控用于抑制不需要的旁瓣。还优选使用提供定量和定性输出的自校准方案。对探头和参考光束中的至少一个施加校准调制，随后校准调制在后检测器阶段被移除，并用于对声调制输出进行归一化。自校准方案的变化包括基于校准相位调制的参考光束和时间延迟干涉仪以及基于校准幅度调制的光子通量测量方法。

12. 发明授权

US5909279A Ultrasonic sensor using short coherence length optical source, and operating method 失效
标题翻译：超声波传感器采用短相干长度光源，并具有操作方法
公开(公告)号：US5909279A
公开(公告)日：1999-06-01
申请号：US820665
申请日：1997-03-17
申请人： David M. Pepper , Gilmore J. Dunning , Thomas R. O'Meara
发明人： David M. Pepper , Gilmore J. Dunning , Thomas R. O'Meara
IPC分类号： G01H9/00 , G01B9/02
CPC分类号： G01H9/006
摘要： A dual time delay interferometer (TDI) enables remote sensing of phase modulated information, such as the detection of ultrasonic vibrations from highly diffuse surfaces, preferably in the range from about 10 kHz to 100 MHZ or more. The system can also be configured in a transceive mode with a dual pass through a single TDI, which is well suited to optical communications. A non-steady-state photo-electromotive-force detector tracks the movement of interference fringes (whose position shifts as the surface vibrates), rather than their absolute position. A phased array of the sensors can be used for enhanced imaging applications requiring better signal/noise ratios, or alternatively, when lower power optical sources are employed.
摘要翻译：双时间延迟干涉仪（TDI）能够远程感测相位调制信息，例如从高度漫射表面检测超声波振动，优选在约10kHz至100MHz或更高的范围内。该系统也可以配置成一个双通道通过单个TDI的收发模式，这非常适合于光通信。非稳态光电动势检测器跟踪干涉条纹（其表面振动时的位置偏移）的运动，而不是它们的绝对位置。传感器的相控阵列可用于需要更好信号/噪声比的增强成像应用，或者当采用较低功率的光源时。

13. 发明授权

US5717516A Hybrid laser power combining and beam cleanup system using nonlinear and adaptive optical wavefront compensation 失效
标题翻译：混合激光功率组合和束清理系统采用非线性和自适应光波前补偿
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。

14. 发明授权

US5546187A Self-referencing laser-based ultrasonic wave receiver 失效
标题翻译：自参考激光超声波接收机
公开(公告)号：US5546187A
公开(公告)日：1996-08-13
申请号：US404778
申请日：1995-03-15
申请人： David M. Pepper , Thomas R. O'Meara , Phillip V. Mitchell
发明人： David M. Pepper , Thomas R. O'Meara , Phillip V. Mitchell
IPC分类号： G01D5/48 , G01H9/00 , G01B9/02
CPC分类号： G01D5/48 , G01H9/002
摘要： An optical self-referencing ultrasonic receiver for detecting ultrasonic waves removes wavefront distortions imparted on the optical beams by diffusely reflecting readout surfaces or other sources, compensates for noise induced phase errors on the readout beam, compensates for amplitude noise present on the readout beam, substantially matches the wavefronts of the readout and reference beams, is capable of operating in a heterodyne mode and is self-aligning. In one embodiment, ultrasonic waves are measured by directing a signal beam and a reference beam to a surface of the workpiece so that the signal beam reflects off an area that is being vibrated by the ultrasonic waves, and the reference beam reflects off a different area of the surface. The signal beam gets phase modulated by the ultrasonic wave induced vibrations and also by other noise induced vibrations. The reference beam only gets phase modulated by the noise induced vibrations. The phase modulated signal and reference beams are directed to a wavefront compensator that overlaps the beams, substantially matches their wavefronts and removes wavefront distortions without altering their respective optical phases. The wavefront compensated beams are directed to a coherent detector whose output signal has a phase shift which corresponds to the difference between the optical phase shift on the signal beam (due to ultrasonic wave vibrations and noise vibrations) and the optical phase shift on the reference beam (due to noise vibrations only). Thus, noise induce vibrations common to both beams are canceled out.
摘要翻译：用于检测超声波的光学自参考超声波接收器通过漫反射读出表面或其他源去除在光束上的波前失真，补偿读出光束上的噪声感应相位误差，补偿存在于读出光束上的振幅噪声，基本上匹配读出和参考光束的波前，能够以外差模式工作并且是自对准的。在一个实施例中，通过将信号光束和参考光束引导到工件的表面来测量超声波，使得信号光束从由超声波振动的区域反射，并且参考光束反射出不同的区域的表面。信号光束由超声波引起的振动以及其他噪声引起的振动相位调制。参考光束仅被噪声引起的振动相位调制。相位调制信号和参考光束被引导到与波束重叠的波前补偿器，基本上匹配它们的波阵面并去除波阵面失真而不改变它们各自的光学相位。波前补偿光束被引导到相干检测器，其输出信号具有对应于信号光束上的光学相移（由于超声波振动和噪声振动）与参考光束之间的光学相移之间的差异的相移（仅由于噪音振动）。因此，消除两个光束共同的噪声诱发振动。

15. 发明授权

US07283751B2 Adaptive optical system compensating for phase fluctuations 有权
标题翻译：自适应光学系统补偿相位波动
公开(公告)号：US07283751B2
公开(公告)日：2007-10-16
申请号：US10759509
申请日：2004-01-15
申请人： Hans W. Bruesselbach , Monica Minden , Metin S. Mangir , Cris Jones , David M. Pepper
发明人： Hans W. Bruesselbach , Monica Minden , Metin S. Mangir , Cris Jones , David M. Pepper
IPC分类号： H04B10/00
CPC分类号： H04B10/112
摘要： A method and apparatus for compensating for phase fluctuations incurred by an optical beam travelling through free space, especially a turbulent atmosphere. A transmitting station transmits a plurality of uniquely tagged optical beams through free space. The plurality of uniquely tagged optical beams are received at a receiving station, where a parameter of each uniquely tagged optical beam is quantified. Information associated with the quantified parameter for each uniquely tagged optical beam is then sent back to the transmitting station via a wireless feedback link. Using the information, the transmitting station adjusts at least one uniquely tagged optical beam to compensate for phase fluctuations.
摘要翻译：一种用于补偿由光束穿过自由空间，特别是湍流气氛所引起的相位波动的方法和装置。发射站通过自由空间发射多个唯一标记的光束。多个唯一标记的光束在接收站处被接收，其中每个唯一标记的光束的参数被量化。与每个唯一标记的光束的量化参数相关联的信息然后经由无线反馈链路被发送回发送站。使用该信息，发射站调整至少一个唯一标记的光束以补偿相位波动。

16. 发明授权

US07027161B2 Adaptive optical system with self-referencing contrast control 失效
标题翻译：具有自参照对比度控制的自适应光学系统
公开(公告)号：US07027161B2
公开(公告)日：2006-04-11
申请号：US10329900
申请日：2002-12-26
申请人： David M. Pepper
发明人： David M. Pepper
IPC分类号： G01B9/02
CPC分类号： G02F1/135 , G01J9/02 , G02B26/06 , G02B27/0025 , G02F2203/18
摘要： A system for wavefront aberration reduction of an incident optical beam. The system includes a spatial light modulator (SLM) for receiving the incident optical beam and forming an output optical beam. The output beam is aberration-reduced compared to the incident beam. An interferometer receives a portion of the output optical beam and generates an interference fringe pattern by introducing a phase shift to one part of the portion of the output optical beam, the interference fringe pattern being applied to the SLM. The interference fringe pattern is representative of the wavefront error of the incident optical beam and the interference fringe pattern activates the SLM such that the SLM performs wavefront error correction on the output optical beam.
摘要翻译：用于入射光束的波前像差减小的系统。该系统包括用于接收入射光束并形成输出光束的空间光调制器（SLM）。与入射光束相比，输出光束的像差减小。干涉仪接收输出光束的一部分，并通过向输出光束的一部分引入相移而产生干涉条纹图案，干涉条纹图案被施加到SLM。干涉条纹图案代表入射光束的波前误差，并且干涉条纹图案激活SLM，使得SLM在输出光束上执行波前误差校正。

17. 发明授权

US06777244B2 Compact sensor using microcavity structures 失效
标题翻译：使用微腔结构的紧凑型传感器
公开(公告)号：US06777244B2
公开(公告)日：2004-08-17
申请号：US09732833
申请日：2000-12-06
申请人： David M. Pepper , Daniel Sievenpiper
发明人： David M. Pepper , Daniel Sievenpiper
IPC分类号： G01N2131
CPC分类号： G01N21/7746 , G01N21/031 , G01N21/774
摘要： A compact sensor for detection of chemical and/or biological compounds in low concentration. The sensor comprises electromagnetic microcavities. The agent to be detected passes the microcavities, is absorbed and/or absorbed by the microcavities, and modifies the electromagnetic field inside the microcavities. After the agent has been adsorbed and/or absorbed, a probe beam is applied to the microcavities. The change of electromagnetic field is detected by the detector, and the frequency of the probe beam at which the resonance is observed, is indicative of a particular agent being present. A method for detecting chemical and/or biological compounds using the sensor.
摘要翻译：用于检测低浓度化学和/或生物化合物的紧凑型传感器。该传感器包括电磁微腔。要检测的试剂通过微腔，被微腔吸收和/或吸收，并且改变微腔内的电磁场。在试剂被吸附和/或吸收之后，将探针束施加到微腔。由检测器检测电磁场的变化，并且观察到共振的探测光束的频率表示存在特定的试剂。使用该传感器检测化学和/或生物化合物的方法。

18. 发明授权

US4958908A Bandwidth-preserving brillouin phase conjugate mirror and method 失效
标题翻译：带宽保留布里渊相位共轭镜和方法
公开(公告)号：US4958908A
公开(公告)日：1990-09-25
申请号：US323649
申请日：1989-03-15
申请人： Davis A. Rockwell , Richard C. Lind , David M. Pepper
发明人： Davis A. Rockwell , Richard C. Lind , David M. Pepper
IPC分类号： G02F1/35 , H01S3/30
CPC分类号： G02F1/3538 , H01S3/305
摘要： A coherent input beam from a laser is fed into a Brillouin-enhanced four wave mixer which generates a phase conjugated seed beam in counterpropagation with the input beam. A brillouin amplifier is provided between the laser and four wave mixer to transfer energy from the input beam to the seed beam and thereby amplify the seed beam to produce a phase conjugated output beam with approximately 50% of the energy of the input beam and narrow bandwidth which is free from random phase jumps associated with the acoustic noise generally required to initiate and sustain stimulated Brillouin scattering. The phase conjugated output beam can be modulated or steered in direction, as desired. Reference beams for the four wave mixer may be derived from the same laser source as the input beam and have energies one or more orders of magnitude smaller than the energy of the input beam.
摘要翻译：来自激光器的相干输入光束被馈送到布里渊增强型四波混频器中，其产生与输入光束相反的相位共轭种子光束。在激光和四波混频器之间提供布里渊放大器，以将能量从输入光束传输到种子光束，从而放大种子光束，以产生相位共轭输出光束，输入光束的能量约为50％，窄带宽其没有与通常需要启动和维持受激布里渊散射的声学噪声相关联的随机相位跳跃。可以根据需要在相位共轭输出光束的方向上进行调制或转向。用于四波混频器的参考光束可以从与输入光束相同的激光源获得，并且具有比输入光束的能量小一个或多个数量级的能量。

19. 发明授权

US08681421B1 Molecular gas-filled hollow core photonic crystal fiber laser at infra-red wavelengths 失效
标题翻译：分子充气中空光子晶体光纤激光器在红外波长
公开(公告)号：US08681421B1
公开(公告)日：2014-03-25
申请号：US12885309
申请日：2010-09-17
申请人： David M. Pepper , Hans Bruesselbach , Bryan Fong
发明人： David M. Pepper , Hans Bruesselbach , Bryan Fong
IPC分类号： H04B10/17 , H01S3/067 , H01S3/07 , H01S3/30
CPC分类号： H01S3/06708 , G02B6/02328 , H01S3/06716 , H01S3/06741 , H01S3/302
摘要： An IR laser source providing light in the IR spectrum, the laser source comprising a pump laser operating at a frequency equivalent to wavelength shorter than 2 μm and at a predetermined power, and an optic fiber coupled to the pump laser. The optic fiber has at least a section of a hollow core photonic crystal fiber, the at least a section of hollow core photonic crystal fiber being designed to have at least a passband in the IR spectrum and being filled with a molecular gas for triggering at least one Stoke's shift in the light entering the at least a section of hollow core photonic crystal fiber for the particular power of the pump laser, the at least one Stoke's shift be selected to cause the light entering the at least a section of hollow core photonic crystal fiber to shift in frequency into the passband in the IR spectrum of the hollow core photonic crystal fiber.
摘要翻译：一种在IR光谱中提供光的IR激光源，该激光源包括以等于2μm波长和预定功率的波长工作的泵激光器，以及耦合到泵激光器的光纤。所述光纤具有至少一部分空心光子晶体光纤，所述至少一部分空心光子晶体光纤被设计成在IR光谱中具有至少一个通带并且填充有用于至少触发的分子气体一个斯托克斯的光线进入至少一部分中空光子晶体光纤，用于泵浦激光器的特定功率，至少选择一个斯托克斯转换，使光线进入中空核心光子晶体的至少一部分光纤将频率移动到中空光子晶体光纤的IR光谱中的通带中。

20. 发明授权

US08228582B1 Optical retro-reflective apparatus with modulation capability 失效
标题翻译：具有调制能力的光学逆反射装置
公开(公告)号：US08228582B1
公开(公告)日：2012-07-24
申请号：US12757926
申请日：2010-04-09
申请人： David M. Pepper , Keyvan Sayyah
发明人： David M. Pepper , Keyvan Sayyah
IPC分类号： G02F3/00 , G02B26/08 , G02B26/10 , G02B26/12
CPC分类号： H04B10/112 , G01S17/74 , G02B5/12 , H01L21/6835 , H01L24/18 , H01L24/82 , H01L24/96 , H01L27/14647 , H01L2221/6835 , H01L2224/24051 , H01L2224/24226 , H01L2924/01078 , H01L2924/12042 , H01L2924/12043 , H01L2924/1461 , H01L2924/30105 , H01L2924/3511 , H04B10/2587 , H01L2924/00
摘要： An optical MEMS retro-reflective apparatus with modulation capability having a retro-reflecting structure including a pair of reflective surfaces; and a MEMS device for moving at least one of the reflective surfaces of said pair of reflective surfaces relative to another one of the reflective surfaces of said pair of reflective surfaces a distance which causes the pair of reflective surfaces to switch between a reflective mode of operation and a transmissive mode of operation. A substrate and a moveable grating structure may be substituted for the reflective surfaces.
摘要翻译：一种具有调制能力的光学MEMS回射装置，具有包括一对反射表面的回射结构; 以及MEMS器件，用于相对于所述一对反射表面中的另一个反射表面移动所述一对反射表面中的至少一个反射表面，该距离使得该对反射表面在反射操作模式之间切换和透射的操作模式。基板和可移动光栅结构可以代替反射表面。

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