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公开(公告)号：US20230352899A1
公开(公告)日：2023-11-02
申请号：US18310475
申请日：2023-05-01
Applicant: Nutronics, Inc.
Inventor： Jeffrey D. Barchers , Dale H. Martz
CPC classification number: H01S3/10053 , G01J9/02 , G02B27/123 , G02B27/30 , G02F2/00 , H01S3/2308 , G01J2009/0203 , G01J2009/0211
Abstract: Systems and methods for forming a coherent optical phased array laser source from a spatially combined array of output beams is accomplished without any external measurement devices or wavefront sensors. A master oscillator laser is split into a plurality of optical beam transport and amplifier channels to produce a plurality of optical output beams that are spatially combined in an array format. The spatial phase state of the plurality of output beams is measured at the output of a spatial combiner without use of an external measurement device or sensor. The phase of the plurality of optical output beams is controlled to compensate both for aberrations induced by the optical beam transport and amplifier paths to produce a coherent and spatially phased laser beam at the output of the laser source or to produce a phased laser beam with prescribed phase state on each output beam.
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公开(公告)号：US20050219550A1
公开(公告)日：2005-10-06
申请号：US11139479
申请日：2005-05-31
Applicant: Matthew Hansen
Inventor： Matthew Hansen
CPC classification number: G03F7/70583 , G01J9/02 , G01J2009/0211 , G03F1/44 , G03F7/70025 , G03F7/70591
Abstract: The present invention is directed at a coherence test reticle or lithographic plate, and a method for testing the coherence of a laser beam using the test reticle. The quality or coherence of the laser beam is measured by illuminating the test reticle and the recording and/or analyzing the optical patterns generated by the illumination. The technique was designed for, but not limited to, the characterization of laser-based systems via the detection of optical radiation modulated by transmissive, reflective and diffractive patterns printed on a reticle or lithographic plate designed specifically for this purpose. The novelty and advantages over the prior art are insensitivity to vibration, alignment, and multi-path differences of classical interferometric coherence measurement techniques. Spatial coherence and longitudinal or temporal coherence may be measured independently. Vertical and horizontal coherence may be measured independently. The technique is focus error insensitive. That is to say, that focus errors will be recorded by the technique in a deterministic fashion and can be removed from the data. The robustness and convenience of the technique is driven by the single plate with no optical alignment, making the technique easily implemented in the field. The multiplexing of the feature orientations, sizes and line types and feature locations allows for the determination of coherence parameters as a function of position in the beam.
Abstract translation: 本发明涉及相干测试标线片或平版印刷版，以及用于使用测试掩模版测试激光束的相干性的方法。 通过照射测试标线和记录和/或分析由照明产生的光学图案来测量激光束的质量或相干性。 该技术设计用于但不限于通过检测由通过专门为此目的而设计的掩模版或平版印刷板上印刷的透射，反射和衍射图案调制的光学辐射来表征激光系统。 与现有技术相比的新颖性和优点是对经典干涉相干测量技术的振动，对准和多径差异不敏感。 可以独立地测量空间相干性和纵向或时间相干性。 垂直和水平相干可以独立测量。 该技术是焦点误差不敏感。 也就是说，该技术将以确定性的方式记录焦点误差，并且可以从数据中移除。 该技术的坚固性和便利性由单板驱动，无需光学对准，使得该技术在现场轻松实现。 特征取向，尺寸和线类型以及特征位置的多路复用允许确定作为光束中位置的函数的相干参数。
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公开(公告)号：US5245408A
公开(公告)日：1993-09-14
申请号：US647624
申请日：1991-01-11
Applicant: Jonathan D. Cohen
Inventor： Jonathan D. Cohen
IPC: G01J9/02
CPC classification number: G01J9/02 , G01J2009/0211 , G01J2009/0223 , G01N2021/1759 , G01N2201/067
Abstract: An apparatus is described which detects the presence or absence of coherent light and provides an estimate of the coherent light's wavelength. The apparatus employs a common-path "polarization interferometer" in which the two linear polarization paths act as interferometer legs. Electro-optic modulation is used to effect periodic differential path length changes in the interferometer. The apparatus performs synchronous time-integrating detection on the light emerging from the interferometer to measure coherent contributions in the presence of obscuring incoherent light.
Abstract translation: 描述了一种检测相干光的存在或不存在并提供相干光的波长的估计的装置。 该装置采用公共路径“偏振干涉仪”，其中两个线性偏振路径用作干涉仪腿。 电光调制用于影响干涉仪中的周期差分路径长度变化。 该装置对从干涉仪出射的光进行同步时间积分检测，以在存在模糊非相干光的情况下测量相干贡献。
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公开(公告)号：US4743114A
公开(公告)日：1988-05-10
申请号：US884695
申请日：1986-07-11
Applicant: Robert Crane, Jr.
Inventor： Robert Crane, Jr.
CPC classification number: G01J9/02 , G01S3/782 , G01J2003/1243 , G01J2009/0211 , G01J2009/0249 , G01J3/26 , G01J9/0246
Abstract: An imaging coherent radiometer incorporating a Fabry-Perot interferometer which is scanned or nutated, for detecting and determining location and wavelength of coherent radiation or the coherent absence of radiation in the presence of non-coherent ambient radiation.
Abstract translation: 包含被扫描或章程化的法布里 - 珀罗干涉仪的成像相干辐射计，用于在存在非相干环境辐射的情况下检测和确定相干辐射的位置和波长或相干不存在辐射。
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公开(公告)号：US08669512B2
公开(公告)日：2014-03-11
申请号：US13338386
申请日：2011-12-28
Applicant: Amir Nevet , Alex Hayat , Meir Orenstein
Inventor： Amir Nevet , Alex Hayat , Meir Orenstein
IPC: H01J40/14
CPC classification number: G01J11/00 , G01J1/42 , G01J9/02 , G01J2001/442 , G01J2001/4466 , G01J2009/0211
Abstract: A system for measuring one or more characteristics of light of a photon energy Eph from a light source, that can be determined from measuring three-photon absorption events, the system comprising: a) a detector having a band gap material characterized by gap energy between 2.1 and 3 times Eph; b) an optical element configured to concentrate a beam of light from the light source on the detector; c) a signal amplifier that amplifies an output signal indicative of when three photons produced by the light source undergo a three-photon absorption event in the band gap material; and d) an analyzer that analyzes the output signal to count or measure a rate of the three-photon absorption events, and determines the one or more characteristics of the light from the light source.
Abstract translation: 一种用于测量来自光源的光子能量Eph的光的一个或多个特性的系统，其可以通过测量三光子吸收事件来确定，所述系统包括：a）具有带隙材料的检测器，其特征在于， 2.1倍和3倍Eph; b）光学元件，被配置为将来自光源的光束聚集在检测器上; c）信号放大器，其放大指示由所述光源产生的三个光子何时在所述带隙材料中经历三光子吸收事件的输出信号; 以及d）分析器，其分析输出信号以计数或测量三光子吸收事件的速率，并且确定来自光源的光的一个或多个特性。
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Patent Agency Ranking
公开(公告)号：US08456622B1
公开(公告)日：2013-06-04
申请号：US12892317
申请日：2010-09-28
Applicant: Lee E. Estes , Lynn T. Antonelli
Inventor： Lee E. Estes , Lynn T. Antonelli
CPC classification number: G01J9/02 , G01J2009/0211
Abstract: A system for determining spatial coherence, temporal coherence or both of an optical signal includes a fiber bundle containing optical fibers. Optical fiber inputs are arranged in proximate groups having the same number of fibers. The groups can each receive a portion of the optical signal. Each fiber in the group has a gross length that differs from the other fibers, but each group has the same set of different gross lengths. The fibers are joined to a lens which spreads the optical signal and causes interference between portions of the signal. This interference is detected at a detector. A computer joined to the detector can measure spatial and temporal coherence from the interference. Other embodiments feature multiple detectors and reflection along the bundle.
Abstract translation: 用于确定空间相干性，时间相干性或光信号两者的系统包括含有光纤的光纤束。 光纤输入被布置在具有相同数量的光纤的近组中。 这些组可以各自接收光信号的一部分。 组中的每个纤维的总长度与其他纤维不同，但是每个组具有相同的不同总长度的组。 光纤连接到透镜，该透镜扩展光信号并且引起信号的部分之间的干扰。 在检测器处检测到这种干扰。 连接到检测器的计算机可以测量干扰的空间和时间相干性。 其他实施例具有沿着束的多个检测器和反射。
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公开(公告)号：US06934038B2
公开(公告)日：2005-08-23
申请号：US09899570
申请日：2001-07-06
Applicant: Matthew E. Hansen
Inventor： Matthew E. Hansen
CPC classification number: G03F7/70583 , G01J9/02 , G01J2009/0211 , G03F1/44 , G03F7/70025 , G03F7/70591
Abstract: The present invention is directed at a coherence test reticle or lithographic plate, and a method for testing the coherence of a laser beam using the test reticle. The quality or coherence of the laser beam is measured by illuminating the test reticle and the recording and/or analyzing the optical patterns generated by the illumination. The technique was designed for, but not limited to, the characterization of laser-based systems via the detection of optical radiation modulated by transmissive, reflective and diffractive patterns printed on a reticle or lithographic plate designed specifically for this purpose. The novelty and advantages over the prior art are insensitivity to vibration, alignment, and multi-path differences of classical interferometric coherence measurement techniques. Spatial coherence and longitudinal or temporal coherence may be measured independently. Vertical and horizontal coherence may be measured independently. The technique is focus error insensitive. That is to say, that focus errors will be recorded by the technique in a deterministic fashion and can be removed from the data. The robustness and convenience of the technique is driven by the single plate with no optical alignment, making the technique easily implemented in the field. The multiplexing of the feature orientations, sizes and line types and feature locations allows for the determination of coherence parameters as a function of position in the beam.
Abstract translation: 本发明涉及相干测试标线片或平版印刷版，以及用于使用测试掩模版测试激光束的相干性的方法。 通过照射测试标线和记录和/或分析由照明产生的光学图案来测量激光束的质量或相干性。 该技术设计用于但不限于通过检测由通过专门为此目的而设计的掩模版或平版印刷板上印刷的透射，反射和衍射图案调制的光学辐射来表征激光系统。 与现有技术相比的新颖性和优点是对经典干涉相干测量技术的振动，对准和多径差异不敏感。 可以独立地测量空间相干性和纵向或时间相干性。 垂直和水平相干可以独立测量。 该技术是焦点误差不敏感。 也就是说，该技术将以确定性的方式记录焦点误差，并且可以从数据中移除。 该技术的坚固性和便利性由单板驱动，无需光学对准，使得该技术在现场轻松实现。 特征取向，尺寸和线类型以及特征位置的多路复用允许确定作为光束中位置的函数的相干参数。
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公开(公告)号：US4874223A
公开(公告)日：1989-10-17
申请号：US312428
申请日：1989-02-17
Applicant: Thomas R. O'Meara
Inventor： Thomas R. O'Meara
CPC classification number: G01J9/02 , G02F1/11 , G01J2009/0211
Abstract: A self-tuning optical notch filter is employed to separate coherent from noncoherent radiation in an overall beam. The presence of coherent radiation is detected, preferably with an interferometer, and the frequency of the detected coherent radiation is determined. An electrical control signal is generated with a frequency corresponding to that of the coherent radiation, and causes an optical filter to filter out the coherent radiation from the beam. In the preferred embodiment the optical filter is a Bragg cell, and the electrical control signal is applied to an electro-acoustic transducer which furnishes an acoustic control signal to the Bragg cell.
Abstract translation: 采用自调谐光陷波滤波器将整个波束中的相干辐射与非相干辐射分离。 检测到相干辐射的存在，优选地用干涉仪，并且确定检测到的相干辐射的频率。 产生具有对应于相干辐射的频率的电气控制信号，并且使得滤光器滤出来自光束的相干辐射。 在优选实施例中，滤光器是布拉格单元，并且电控信号被施加到向布拉格单元提供声控信号的电声换能器。
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公开(公告)号：US4735507A
公开(公告)日：1988-04-05
申请号：US884694
申请日：1986-07-11
Applicant: Robert Crane, Jr. , David S. Dunavan
Inventor： Robert Crane, Jr. , David S. Dunavan
CPC classification number: G01J9/02 , G01S3/782 , G01J2009/0211 , G01J2009/0249 , G01J3/26 , G01J9/0246
Abstract: An imaging coherent radiometer for detecting and determining the location and wavelength of coherent radiation or coherent lack of radiation in the presence of non-coherent ambient radiation. The apparatus includes an unequal path interferometer which divides incoming radiation containing coherent and non-coherent radiation into a first beam path and a second beam path through which a first beam and a second beam, respectively, travel. The optical path length difference between the first beam path and the second beam path are greater than the coherence length of the non-coherent radiation, but substantially less than the coherence length of the coherent radiation or coherent lack of radiation. Modulation means are provided to cause a predetermined difference in the optical frequencies between the first beam and the second beam proportional to a modulation signal. The first and second beams are then recombined into a recombined beam. Detecting means are provided to detect the interference of the first and second beams across the entire wavefront of the recombined beam, and over the entire image of the scene being viewed. Processing means detect and determine the location and wavelength of coherent radiation or coherent lack of radiation in the scene being viewed by the apparatus. This information can then be visually displayed. Additional processing means to respond to specific coherent wavelengths or wavelength sets.
Abstract translation: 一种成像相干辐射计，用于在存在非相干环境辐射的情况下检测和确定相干辐射的位置和波长或相干缺乏辐射。 该装置包括不等径干涉仪，其将包含相干和非相干辐射的入射辐射分成第一光束路径和第二光束路径，第一光束和第二光束分别通过第二光束路径行进。 第一光束路径和第二光束路径之间的光程长度差大于非相干辐射的相干长度，但是基本上小于相干辐射的相干长度或相干缺乏辐射。 提供调制装置以使得与调制信号成比例的第一光束和第二光束之间的光学频率的预定差异。 然后将第一和第二光束重新组合成重组光束。 提供检测装置以检测第一和第二光束在重组光束的整个波前的干涉，以及在正在观看的场景的整个图像上。 处理装置检测并确定由装置观察到的场景中相干辐射的位置和波长或相干的辐射干扰。 然后可以直观地显示该信息。 对特定相干波长或波长集合进行响应的附加处理装置。
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公开(公告)号：US4600307A
公开(公告)日：1986-07-15
申请号：US518729
申请日：1983-07-29
Applicant: William T. Krohn , Mark J. McNally , Rene Abreu
Inventor： William T. Krohn , Mark J. McNally , Rene Abreu
IPC: G01J9/02
CPC classification number: G01J9/02 , G01J2009/0211
Abstract: This invention relates to unequal path interferometers which are adapted, among other possible uses, for use in detecting coherent radiation as from a laser in a packet of radiation including incoherent background radiation, which includes an unequal optical path length interferometer of the type in which portions of the radiation impinging on the interferometric component are caused to be recombined after travelling two different optical paths; the optical paths differing in length by an amount substantially greater than the coherence length of the non-coherent radiation but substantially less than the coherence length of the coherent radiation; the unequal optical path length interferometric component including a crystalline cell having anisotropic properties; circuitry for applying an ultrasonic sound wave to the crystalline cell to vary the effective index of refraction of the crystalline cell in a preselected systematic manner; a detector for detecting the intensity of the recombined portions and producing a signal representative thereof, said signal having a variable component caused by the varying constructive and destructive interference of the recombined coherent radiation components, while the recombined non-coherent radiation components produce only a substantially steady background signal.
Abstract translation: 本发明涉及不等径干涉仪，它们可以用于检测包括非相干背景辐射在内的包括不相干背景辐射的辐射分组中的激光的相干辐射，其包括不相等的光路长度干涉仪，其中部分 导致入射到干涉测量分量上的辐射在行进两个不同光路之后被重组; 光路长度不同于非相干辐射的相干长度，但基本上小于相干辐射的相干长度; 包括具有各向异性特性的晶体单元的不等的光程长度干涉测量组件; 用于将超声波施加到结晶细胞以以预选的系统方式改变结晶细胞的有效折射率的电路; 用于检测重组部分的强度并产生代表其的信号的检测器，所述信号具有由重新组合的相干辐射分量的变化的结构性和相消干涉引起的可变分量，而重组的非相干辐射分量仅产生基本上 稳定的背景信号。
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