公开(公告)号：US4442455A

公开(公告)日：1984-04-10

申请号：US260784

申请日：1981-05-05

申请人： Jean P. Huignard ,  Marcel Malard

发明人： Jean P. Huignard ,  Marcel Malard

IPC分类号： G02F1/35 ,  G01S7/481 ,  G01S17/89 ,  G02F2/00 ,  G03H1/00 ,  G03H1/04 ,  H04N5/33 ,  H04N5/30

CPC分类号： G01S7/4811 ,  G01S17/89 ,  G02F2/002 ,  G03H1/00 ,  H04N5/33

摘要： An optical observation system in accordance with the invention comprises illumination means by scanning the object and means for detecting the radiation diffracted by the object. It also comprises an interaction medium in which the wave emerging from the object interferes with a pumping wave in order to induce in it a system of layers diffracting in real time a replica of the object wave propagating in the direction of said wave and a complex conjugate wave propagating in the opposite direction. These waves, which are isomorphic of the object wave help to improve the detection of the object.

摘要翻译： 根据本发明的光学观察系统包括通过扫描对象的照明装置和用于检测被物体衍射的辐射的装置。 它还包括一种相互作用介质，其中从物体出射的波干扰泵浦波，以便在其中引入一层实时衍射的物体波在所述波方向上传播的复制品和复共轭 波在相反方向传播。 这些与对象波同构的波有助于改善对象的检测。

公开(公告)号：US4390247A

公开(公告)日：1983-06-28

申请号：US274561

申请日：1981-06-17

申请人： Frederick W. Freyre

发明人： Frederick W. Freyre

IPC分类号： G02B6/28 ,  G02F1/11 ,  G02F2/00 ,  H03H9/38

CPC分类号： H03H9/38 ,  G02F1/11 ,  G02F2/002 ,  G02B6/2861 ,  Y10S372/70

摘要： Coherent light is incident upon an acousto-optical cell through which bulk acoustic waves are propagating. These acoustic waves correspond to a signal to be delayed and result from the application of the signal to a piezoelectric transducer of the cell. The waves cause periodic variations in the refractive index of the cell which interact with the coherent light. Acoustic frequency components of the propagating waves correspond to the signal frequency components and cause the cell to diffract the beam of incident coherent light and to frequency shift the diffracted beam. The relative phases of the acoustic frequency components of the acoustic waves also correspond to the phases of the frequency components of the signal to be delayed and are imparted to the respective diffracted light beams. The diffracted light is combined with undiffracted coherent light so that optical heterodyning takes place. The recombined light is focused by a Fourier transform lens onto a photomixer which detects the frequency difference between the diffracted and undiffracted light beams. This detected frequency difference corresponds to the signal to be delayed. The delay time is the time required to convert the signal to corresponding acoustic waves and to optically detect the waves. The delay time is equal to the time required for the acoustic waves to propagate from the transducer to the point of incidence of the coherent light on the cell. Deflecting the coherent light incident upon the acousto-optical cell varies the point of incidence on the cell and, therefore, the delay time.

摘要翻译： 相干光入射到声波传播的声光单元上。 这些声波对应于待延迟的信号，并且是由信号施加到电池的压电换能器而产生的。 波浪引起与相干光相互作用的单元的折射率的周期性变化。 传播波的声频分量对应于信号频率分量，并导致单元衍射入射相干光束并对衍射光束进行频移。 声波的声频分量的相对相位也对应于要延迟的信号的频率分量的相位，并被赋予各个衍射光束。 衍射光与未衍射的相干光组合，从而发生光学外差。 复合光被傅立叶变换透镜聚焦到光敏混合器上，该混色器检测衍射光束和未衍射光束之间的频率差。 该检测到的频率差对应于要延迟的信号。 延迟时间是将信号转换为相应声波所需的时间，并光学地检测波。 延迟时间等于声波从传感器传播到单元上的相干光的入射点所需的时间。 偏转入射在声光电池上的相干光改变了电池的入射点，因此改变了延迟时间。

公开(公告)号：US4131792A

公开(公告)日：1978-12-26

申请号：US871864

申请日：1978-01-24

申请人： Howard Schlossberg

发明人： Howard Schlossberg

IPC分类号： G02F2/00 ,  H04B10/148 ,  H04B9/00

CPC分类号： H04B10/60 ,  G02F2/002

摘要： An improved Fabry-Perot diplexer for receiving a first and second signal of differing frequency from different directions and outputting these signals in parallel relationship with respect to one another and in the same direction. The diplexer is made up of four highly reflective elements having substantially no transmission and defining an optical path therebetween. Interposed within the optical path are a pair of beamsplitters. The total length of the optical path is defined for resonance at the frequency of a first input signal and non-resonance at the frequencies of a second input signal. As a result thereof the output signals have substantially no loss associated therewith.

摘要翻译： 一种改进的法布里 - 珀罗双工器，用于从不同方向接收不同频率的第一和第二信号，并且相对于彼此并沿相同的方向输出这些信号。 双工器由四个高反射元件组成，其基本上没有透射并且在它们之间限定光路。 在光路内插入一对分束器。 光路的总长度被定义为在第一输入信号的频率处的谐振和在第二输入信号的频率处的非共振。 结果，输出信号基本上没有与之相关的损失。

公开(公告)号：US3950100A

公开(公告)日：1976-04-13

申请号：US518924

申请日：1974-10-29

申请人： Wayne H. Keene ,  Clarke E. Harris ,  Albert V. Jelalian ,  Christopher R. Miller ,  Richard E. Seavey

发明人： Wayne H. Keene ,  Clarke E. Harris ,  Albert V. Jelalian ,  Christopher R. Miller ,  Richard E. Seavey

IPC分类号： G01P3/36 ,  G01P5/26 ,  G01S17/58 ,  G02F2/00 ,  H01S3/13 ,  H01S3/00

CPC分类号： H01S3/1304 ,  G01P3/366 ,  G01P5/26 ,  G01S17/58 ,  G02F2/002

摘要： A laser heterodyne system is disclosed wherein received reflections of a beam of coherent light are amplified in a laser. The amplified received reflections are heterodyned with the light produced by the laser and the resulting beat frequency is detected using a photodetector. A controller, responsive to the beat frequency, controls, in one case, the frequency of a transmitting laser, and hence the frequency of the received light, and, in another case, the frequency of the light produced by the amplifying laser so that, in either case, the difference between the frequency of the received light and the frequency of the light produced by the amplifying laser is adjusted to maximize the amplification of the received light by the amlifying laser prior to detection by the photodetector.

公开(公告)号：US3834816A

公开(公告)日：1974-09-10

申请号：US30647672

申请日：1972-11-14

申请人： HUGHES AIRCRAFT CO

发明人： PEDINOFF M

IPC分类号： G01P3/36 ,  G01S7/481 ,  G01S7/483 ,  G02F2/00 ,  H01S3/30

CPC分类号： G01P3/366 ,  G01S7/4812 ,  G01S7/483 ,  G02F2/002 ,  H01S3/30

摘要： An apparatus to produce Brillouin scattering by means of two oppositely directed colinear optical beams, frequency-translated and of varying power level, in a time sequence suitable for processing doppler-shifted radar target echoes by means of a simplified optical heterodyne detection system.

摘要翻译： 借助于简化的光外差检测系统，适用于处理多普勒偏移的雷达目标回波的时间序列，通过两个相反指向的共线光束产生布里渊散射的装置，其频率转换和变化的功率电平。

公开(公告)号：US3746454A

公开(公告)日：1973-07-17

申请号：US3746454D

申请日：1971-03-03

申请人： US NAVY

发明人： ARAMS F ,  PACE F ,  LANGE R

IPC分类号： G01J1/04 ,  G01J1/42 ,  G01S17/06 ,  G02F2/00 ,  G01B11/26

CPC分类号： G01S17/06 ,  G01J1/0209 ,  G01J1/04 ,  G01J1/0411 ,  G01J1/0422 ,  G01J1/4228 ,  G02F2/002

摘要： There is disclosed a receiver for an optical radar utilizing a two-dimensional array of microlens image dissectors which completely fills an area of an image plane. Each microlens is directly coupled to a mixer-detector element. The array is adapted to be illuminated with returned focus radiation from a remote reflecting target and with a planar wave of optical energy from a local oscillator. The output signals of the mixerdetectors are analyzed and utilized to orientate the array such that the maximum amplitude output signal corresponds to the central microlens of the array.

摘要翻译： 公开了一种用于利用完全填充图像平面区域的微透镜图像去除器的二维阵列的光学雷达接收器。 每个微透镜直接耦合到混合器 - 检测器元件。 该阵列适于被来自远程反射目标的返回的聚焦辐射和来自本地振荡器的平面光能量的光能照射。 分析和利用混频器 - 检测器的输出信号使阵列定向，使得最大振幅输出信号对应于阵列的中心微透镜。

公开(公告)号：US3426207A

公开(公告)日：1969-02-04

申请号：US3426207D

申请日：1964-06-17

申请人： NORTH AMERICAN ROCKWELL

发明人： FRIED DAVID L ,  READ WENDELL S

IPC分类号： G02F2/00 ,  H04B10/148 ,  H04B9/00

CPC分类号： H04B10/60 ,  G02F2/002 ,  H04B10/64

公开(公告)号：US3350654A

公开(公告)日：1967-10-31

申请号：US33678264

申请日：1964-01-09

申请人： AMERICAN OPTICAL CORP

发明人： ELIAS SNITZER

IPC分类号： G02F2/00

CPC分类号： G02F2/002

公开(公告)号：US20180143376A1

公开(公告)日：2018-05-24

申请号：US15568610

申请日：2016-05-27

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Shin Kamei ,  Makoto Jizodo ,  Hiroshi Fukuda ,  Kiyofumi Kikuchi ,  Ken Tsuzuki

IPC分类号： G02B6/125 ,  G02B6/126 ,  G02F2/00

CPC分类号： G02B6/125 ,  G02B6/00 ,  G02B6/126 ,  G02B6/2813 ,  G02F2/00 ,  G02F2/002 ,  H04J14/06

摘要： A coherent optical mixer circuit is provided that can measure a phase error without requiring a step of cutting away a delay circuit. Odd-numbered or even-numbered two of four inputs of an 4-input-and-4-output multimode interference circuit are connected to an input mechanism. The four outputs of the multimode interference circuit are all connected to an output mechanism to the exterior. Other two inputs of the multimode interference circuit are connected to two monitor waveguides. One of the monitor waveguide is longer than the other to configure a light delay circuit. The monitor waveguides constituting the light delay circuit are connected to the respective outputs of a 2-branched light splitter. The 2-branched light splitter has an input connected to a monitor light input mechanism from the exterior via a monitor input waveguide.

公开(公告)号：US20170358901A1

公开(公告)日：2017-12-14

申请号：US15537344

申请日：2015-12-11

申请人： THALES ,  ALCATEL LUCENT

发明人： Frédéric VAN DIJK

IPC分类号： H01S5/0625 ,  G02F1/35 ,  H01S5/026 ,  H01L31/08 ,  G01N21/3581

CPC分类号： G02F1/3534 ,  G01N21/3581 ,  G02F2/002 ,  G02F2203/13 ,  H01L31/08 ,  H01S5/026 ,  H01S5/06258 ,  H01S5/4031 ,  H01S5/4087 ,  H01S5/50 ,  H04B10/90 ,  H04B2210/006

摘要： An optoelectronic component for generating and radiating an electromagnetic signal exhibiting a frequency lying between 30 GHz and 10 THz referred to as a microwave frequency, comprises: a planar guide configured to confine and propagate freely in a plane XY a first and a second optical wave exhibiting an optical frequency difference, referred to as a heterodyne beat, equal to the microwave frequency, a system for injecting the optical waves into the planar guide, a photo-mixer coupled to the planar guide to generate, on the basis of the first optical wave and of the second optical wave, a signal exhibiting the microwave frequency, the photo-mixer having an elongated shape exhibiting along an axis Y a large dimension greater than or equal to half the wavelength of the signal, the injection system configured so that the optical waves overlap in the planar guide and are coupled with the photo-mixer over a length along the axis Y at least equal to half the wavelength of the signal, the photo-mixer thus being able to radiate the signal.