公开(公告)号：US5877875A

公开(公告)日：1999-03-02

申请号：US863638

申请日：1997-05-28

申请人： James J. Reis ,  Richard L. Davis ,  Harold M. Stoll

发明人： James J. Reis ,  Richard L. Davis ,  Harold M. Stoll

IPC分类号： G03H1/30 ,  G11B7/0065 ,  G11B7/085 ,  G11B7/135 ,  G11C13/04 ,  G03H1/26

CPC分类号： G11B7/1356 ,  G03H1/30 ,  G11B7/0065 ,  G11C13/042 ,  G11B7/08511

摘要： In a method for addressing holograms stored in a plurality of separate storage media, a reference beam is directed to a selected one of the plurality of storage media, the reference beam is then focused so as to obtain a substantially flat wavefront within a reference beam plane of the selected storage medium, and the angle of the reference beam is then varied so as to select a hologram stored therein.

摘要翻译： 在存储在多个分开的存储介质中的寻址全息图的方法中，参考光束被引导到多个存储介质中的所选择的一个，参考光束然后被聚焦，以便在参考光束平面内获得基本上平坦的波前 ，然后改变参考光束的角度，以便选择存储在其中的全息图。

公开(公告)号：US5497253A

公开(公告)日：1996-03-05

申请号：US99882

申请日：1993-07-30

申请人： Harold M. Stoll ,  James J. Reis

发明人： Harold M. Stoll ,  James J. Reis

IPC分类号： G02F3/00 ,  G03H1/04 ,  G03H1/16 ,  G03H1/18 ,  G06E3/00 ,  G06G7/60 ,  G06K9/74 ,  G06K9/76 ,  G06N3/067 ,  G02B27/46

CPC分类号： G06K9/745 ,  G03H1/0248 ,  G03H1/16 ,  G06E3/001 ,  G06N3/067 ,  G03H1/0005 ,  G03H1/265 ,  G03H2001/0066 ,  G03H2260/54

摘要： A pattern recognition apparatus and a method for operating same. The apparatus includes a volume holographic medium (4) having a plurality of Fourier-space volume holograms representing pattern templates stored within. The apparatus further includes a spatial light modulator (1) and a phase encoder (2). The phase encoder has an output optically coupled to the medium by a first Fourier transform lens (3). The spatial light modulator spatially modulates a spatially uniform laser beam (7) in accordance with an unknown pattern. The two-dimensional phase encoder causes the spatially modulated laser beam to be spatially distributed prior to application to the medium. The apparatus also includes a detector (6, 11) having an input optically coupled by a second Fourier transform lens (5) means to an angular spectrum of plane waves generated by the medium in response to the output of the spatial modulator, phase encoder, and first Fourier lens. The detector detects plane waves that correspond to vector inner products generated within medium (4) in response to the unknown pattern. The apparatus further contains a means (12) for nonlinearly processing the output of detector (6, 11) and a means (13) by which the output of nonlinear processing means (12) may be temporarily stored.

摘要翻译： 模式识别装置及其操作方法。 该装置包括具有代表存储在其中的图案模板的多个傅立叶空间体积全息图的体积全息介质（4）。 该装置还包括空间光调制器（1）和相位编码器（2）。 相位编码器具有通过第一傅立叶变换透镜（3）光耦合到介质的输出。 空间光调制器根据未知图案空间调制空间均匀的激光束（7）。 二维相位编码器使空间调制的激光束在施加到介质之前被空间分布。 该装置还包括检测器（6,11），该检测器具有由第二傅里叶变换透镜（5）光学耦合的输入装置，该输入装置响应于空间调制器，相位编码器的输出，由介质产生的平面波的角谱， 和第一傅里叶透镜。 检测器检测对应于在介质（4）内响应未知图案产生的向量内积的平面波。 该装置还包括用于非线性处理检测器（6,11）的输出的装置（12）和用于临时存储非线性处理装置（12）的输出的装置（13）。

公开(公告)号：US5642210A

公开(公告)日：1997-06-24

申请号：US420939

申请日：1995-04-12

申请人： Harold M. Stoll ,  James J. Reis

发明人： Harold M. Stoll ,  James J. Reis

IPC分类号： G03H1/04 ,  G03H1/28 ,  G03H1/10 ,  G03H1/02 ,  G03H1/12

CPC分类号： G03H1/0248 ,  G03H1/2249 ,  G03H1/265 ,  G03H1/28

摘要： In a method for mitigating cross-talk in high-efficiency, angle-multiplexed holograms stored in photorefractive media, a plurality of uniformly low-efficiency holograms are first stored within a common holographic storage medium and then simultaneously exposed to a like plurality of mutually incoherent reference beams. Each reference beam effects enhancement of its corresponding hologram so as to increase the level thereof while also minimizing cross-talk between holograms.

摘要翻译： 在一种用于减轻存储在光折射介质中的高效，角度多路复用全息图中的串扰的方法中，多个均匀低效全息图首先存储在共同的全息存储介质中，然后同时暴露于相似的多个相互不相干的全息图 参考光束。 每个参考光束影响其相应全息图的增强，以增加其水平，同时也使全息图之间的串扰最小化。

公开(公告)号：US4755014A

公开(公告)日：1988-07-05

申请号：US876951

申请日：1986-06-20

申请人： Harold M. Stoll ,  Richard L. Davis

发明人： Harold M. Stoll ,  Richard L. Davis

IPC分类号： G02B6/124 ,  G02B6/10

CPC分类号： G02B6/1245

摘要： An integrated optical waveguide structure which provides for efficient, single-mode propagation of light across an interface between two contiguous waveguide layers of differing effective refractive index. The waveguides are formed by layers of increased index of refraction formed at the surface of a substrate and serve to support propagation of optical electromagnetic radiation along the surface of the substrate. A refractive interface is provided at the interface of two such surface layers supporting modes of differing effective indexes of refraction. By underlying one of the surface layers with an additional layer having a particular, but different, index of refraction, a single mode of propagation is supported throughout both of the surface waveguides. General applications in the formation of optical waveguide components as well as a more extensive treatment with the formation of a lens is also disclosed using proton exchange in crystalline LiNbO.sub.3.

摘要翻译： 一种集成的光波导结构，其提供了在不同有效折射率的两个相邻波导层之间的界面上的光的有效单模传播。 波导由在基板的表面形成的折射率增加的层形成，并且用于支持沿着基板的表面的光电磁辐射的传播。 在两个这样的表面层的界面处提供支撑不同折射率的折射界面。 通过具有具有特定但不同的折射率的附加层的表面层的下面的一个，在两个表面波导中支持单一传播模式。 通过使用晶体LiNbO 3中的质子交换也公开了形成光波导部件的一般应用以及透镜形成的更广泛的处理。

公开(公告)号：US5054873A

公开(公告)日：1991-10-08

申请号：US444908

申请日：1989-12-04

申请人： Richard L. Davis ,  Harold M. Stoll

发明人： Richard L. Davis ,  Harold M. Stoll

IPC分类号： G02B6/12 ,  G02B6/34 ,  G02B6/42 ,  G02F1/335

CPC分类号： G02B6/12007 ,  G02B6/4246 ,  G02F1/335

摘要： A tunable, integrated WDM optic couler for coupling optical energy to and from channel waveguides in response to the application of Surface Acoustic Waves (SAW's ), and a distributed processor computer control system utilizing the couplers. A first range of SAW's is used to couple optical energy of selected wavelengths from a channel waveguide driven by a LED to multiplex optical energy to a common optic loop and a second, non-overlapping range of SAW's is used to couple optical energy from the loop to a second channel waveguide. The second, receiving channel waveguide includes a Bragg deflector, planar waveguide and photodetector arrays to demultiplex the optical energy by focusing selected wavelengths of optical energy on selected portions of the photodetector arrays. Changes in the acoustic wavelengths and amplitudes permit tuning of the coupler and computer system by altering the portion and wavelengths, respectively, of optical energy coupled by each section of each coupler.

摘要翻译： 响应于表面声波（SAW）的应用和用于耦合器的分布式处理器计算机控制系统，用于将光能耦合到通道波导和从通道波导耦合的可调谐的集成WDM光学保险杠。 SAW的第一个范围用于耦合来自由LED驱动的通道波导的所选波长的光能量，以将光能量复用到公共光学环路，并且SAW的第二非重叠范围用于耦合来自环路的光能 到第二通道波导。 第二个接收通道波导包括布拉格偏转器，平面波导和光电检测器阵列，以通过将选定的光能波长聚焦在光电检测器阵列的选定部分上来解复用光能。 声波和幅度的变化允许通过改变由每个耦合器的每个部分耦合的光能的分量和波长分别调谐耦合器和计算机系统。

公开(公告)号：US4725774A

公开(公告)日：1988-02-16

申请号：US876952

申请日：1986-06-20

申请人： Richard L. Davis ,  Harold M. Stoll

发明人： Richard L. Davis ,  Harold M. Stoll

IPC分类号： G01R23/17 ,  G01R23/16

CPC分类号： G01R23/17

摘要： Described herein is an integrated acousto-optic circuit for analyzing the spectrum of a radar signal. A waveguided optical beam is first split into two parts, one of which interacts with a surface acoustic wave generated by a reference signal and the second of which interacts with a surface acoustic wave generated by the signal to be analyzed. The two resulting phase-modulated optical waves then are recombined, Fourier transformed by a lens and finally caused to impinge on an array of photodetectors. The array of detectors is arranged so that each element of the array responds to the combination of one component of the time-varying signal to be analyzed and one component of the time-varying reference signal, that response being an output signal at some preselected radio frequency which is proportional to the amplitude of the frequency component of the radar signal to be analyzed. The several optical components are disclosed as formed on a single substrate integrated optical circuit.

摘要翻译： 这里描述了用于分析雷达信号的频谱的集成声光电路。 波导光束首先被分成两部分，其中之一与由参考信号产生的表面声波相互作用，第二部分与由待分析信号产生的声表面波相互作用。 然后将两个所得的相位调制光波重新组合，由透镜进行傅立叶变换，最后导致撞击在一组光电检测器上。 检测器阵列被布置成使得阵列的每个元件响应待分析的时变信号的一个分量和时变参考信号的一个分量的组合，该响应是在某些预选的无线电处的输出信号 与要分析的雷达信号的频率分量的振幅成比例的频率。 公开了在单个基板集成光学电路上形成的多个光学部件。

公开(公告)号：US5896359A

公开(公告)日：1999-04-20

申请号：US819793

申请日：1997-03-18

申请人： Harold M. Stoll

发明人： Harold M. Stoll

IPC分类号： G03H1/04 ,  G03H1/26 ,  G11B7/0065 ,  G11B7/00

CPC分类号： G03H1/0248 ,  G03H1/26 ,  G11B7/0065 ,  G03H1/265 ,  G03H2001/0268 ,  G03H2001/183 ,  G03H2222/56 ,  G03H2223/26 ,  G03H2270/22

摘要： A volume holographic memory has a spinning disk comprised of photorefractive medium, object beam optics configured to direct an object beam through the outer edge of the disk, and reference beam optics configured to simultaneously direct a reference beam through the outer edge of the disk. An angle multiplexer manipulates the reference beam to facilitate the formation of angle multiplexed volume holograms. The object beam and the reference beam cooperate within the photorefractive medium to sequentially form a plurality of sets of angle multiplexed volume holograms therein while the disk is spinning. A phase conjugator directs a conjugate reference beam back through the disk after the reference beam has previously passed therethrough, so as to form a conjugate object beam to facilitate read-out. Amplitude monitoring is provided to facilitate use of an exposure schedule. Path length monitoring assures consistent phase relationship between the object and reference beams for write and erase operations. Calibration of the angle multiplexer is provided.

公开(公告)号：US5902519A

公开(公告)日：1999-05-11

申请号：US819794

申请日：1997-03-18

申请人： Harold M. Stoll

发明人： Harold M. Stoll

IPC分类号： C30B33/00 ,  G03H1/02 ,  G11B7/0065 ,  G11B7/26 ,  G02B1/02

CPC分类号： G11B7/26 ,  C30B29/30 ,  C30B33/005 ,  G11B7/0065 ,  G03H2001/026 ,  G03H2001/0268

摘要： A process for oxidizing iron ions contained within iron-doped lithium niobate. The process comprises the steps of protonating the iron-doped lithium niobate crystal and then placing the same into a pressure chamber where between 10-100 atmospheres of dry, ultra-pure pressurized oxygen are applied. While under pressure, the crystal is heated to approximately 950.degree. C. at a rate not to exceed 50.degree. C. per minute, and preferably at a rate not less than 25.degree. C. per minute. The crystals are then continuously heated at approximately 950.degree. C. for approximately 50 hours and then cooled to 30.degree. C. at a rate not to exceed 50.degree. C. per minute, and preferably at a rate not less than approximately 25.degree. C. per minute. The resulting lithium niobate crystal will thereafter contain iron ions wherein the divalent iron ion ration to the trivalent iron ion ratio is approximately 1:100.

摘要翻译： 在铁掺杂的铌酸锂中氧化铁离子的方法。 该方法包括以下步骤：将掺杂铌酸锂的晶体质子化，然后将其置于施加10-100大气压的干，超纯压力氧气的压力室中。 在压力下，以不超过50℃/分钟的速度将晶体加热至约950℃，优选以不低于25℃/分钟的速度加热。 然后将晶体在约950℃下连续加热约50小时，然后以不超过50℃/分钟的速率冷却至30℃，优选以不低于约25℃的速率冷却。 每分钟。 所得到的铌酸锂晶体之后将含有铁离子，其中二价铁离子与三价铁离子的比例约为1:100。

公开(公告)号：US5966361A

公开(公告)日：1999-10-12

申请号：US226069

申请日：1998-01-06

申请人： Harold M. Stoll

发明人： Harold M. Stoll

IPC分类号： G03H1/04 ,  G03H1/26 ,  G11B7/0065 ,  G11B7/00

CPC分类号： G03H1/0248 ,  G03H1/26 ,  G11B7/0065 ,  G03H1/265 ,  G03H2001/0268 ,  G03H2001/183 ,  G03H2222/56 ,  G03H2223/26 ,  G03H2270/22

摘要： A volume holographic memory has a spinning disk comprised of photorefractive medium, object beam optics configured to direct an object beam through the outer edge of the disk, and reference beam optics configured to simultaneously direct a reference beam through the outer edge of the disk. An angle multiplexer manipulates the reference beam to facilitate the formation of angle multiplexed volume holograms. The object beam and the reference beam cooperate within the photorefractive medium to sequentially form a plurality of sets of angle multiplexed volume holograms therein while the disk is spinning. A phase conjugator directs a conjugate reference beam back through the disk after the reference beam has previously passed therethrough, so as to form a conjugate object beam to facilitate read-out. Amplitude monitoring is provided to facilitate use of an exposure schedule. Path length monitoring assures consistent phase relationship between the object and reference beams for write and erase operations. Calibration of the angle multiplexer is provided.

公开(公告)号：US5717508A

公开(公告)日：1998-02-10

申请号：US422279

申请日：1995-04-13

申请人： Harold M. Stoll

发明人： Harold M. Stoll

IPC分类号： G03H1/26 ,  G11B7/0065 ,  G11C13/04 ,  G03H1/02

CPC分类号： G03H1/26 ,  G11C13/042 ,  G11B7/0065

摘要： A method and system are disclosed for dynamically refreshing angle-multiplexed holograms stored in a photorefractive medium. In accordance with the invention the photorefractive medium is simultaneously exposed to a plurality of reference beams. Each reference beam is oriented at an angle corresponding to an angle at which a hologram was previously stored within the photorefractive medium. The frequency and duration of the reference beams are regulated such that each reference beam enhances the diffraction efficiency of an associated hologram, stored at the angle corresponding to the angle of the reference beam. Each reference beam is preferably at a frequency different from the frequency of the other reference beams so as to avoid the generation of plane-wave holograms due to interference between the multiple reference beams.

摘要翻译： 公开了用于动态刷新存储在光折射介质中的角度多路复用全息图的方法和系统。 根据本发明，光折射介质同时暴露于多个参考光束。 每个参考光束以对应于全息图预先存储在光折射介质内的角度的角度定向。 调整参考光束的频率和持续时间，使得每个参考光束增强相关全息图的衍射效率，以与参考光束的角度相对应的角度存储。 每个参考光束优选地处于与其它参考光束的频率不同的频率，以避免由于多个参考光束之间的干涉而产生平面波全息图。