公开(公告)号：US5200795A

公开(公告)日：1993-04-06

申请号：US401175

申请日：1989-08-31

Applicant: Byoung Y. Kim ,  Hee G. Park ,  Shangyuan Huang

Inventor： Byoung Y. Kim ,  Hee G. Park ,  Shangyuan Huang

IPC: G01J9/02 ,  G02B6/34 ,  H04B10/2581

CPC classification number: H04B10/2581 ,  G01J9/02 ,  G01J2009/0226 ,  G01J2009/0288 ,  G02B6/02047 ,  G02B6/29352

Abstract: A passive quadrature phase detection system for coherent fiber systems includes first and second optical detectors positioned to receive an output signal from the output end of an optical signal apparatus such as an interferometer, or the like. The optical signal from the apparatus includes light propagating in two propagation modes. As the light propagates away from the output end of the apparatus from the near field to the far field, the light in the two modes undergoes a relative phase shift of .pi./2 in accordance with the Guoy effect. The two detectors are positioned such that the first detector detects the intensity of light resulting from the interference between the two modes in the near field of the output signal, and such that the second detector detects the intensity of light resulting from the interference between the two modes in the far field of the output signal. The additional .pi./2 phase difference introduced between the two modes as the light propagates from the near field light to the far field causes the detected light intensities to be in phase quadrature. Electrical signals proportional to the detected light intensities can be processed to determine changes in the phase difference between the two modes within the apparatus. In preferred embodiments, the detection of the near field light intensity is accomplished at a position optically displaced from the output end of the apparatus.

Abstract translation: 用于相干光纤系统的无源正交相位检测系统包括第一和第二光学检测器，其定位成从诸如干涉仪之类的光信号装置的输出端接收输出信号。 来自该装置的光信号包括以两种传播模式传播的光。 当光从设备的输出端从近场传播到远场时，两种模式中的光根据Guoy效应经历pi / 2的相对相移。 两个检测器被定位成使得第一检测器检测由输出信号的近场中的两个模式之间的干扰产生的光的强度，并且使得第二检测器检测由两者之间的干扰导致的光的强度 输出信号的远场模式。 当光从近场光传播到远场时，在两种模式之间引入的额外的π/ 2相位差导致检测到的光强度相位正交。 可以处理与检测到的光强度成比例的电信号，以确定装置内的两种模式之间的相位差的变化。 在优选实施例中，近场光强度的检测是在从设备的输出端光学位移的位置处完成的。

公开(公告)号：US4928527A

公开(公告)日：1990-05-29

申请号：US187805

申请日：1988-04-29

Applicant: Christian P. Burger ,  Thomas D. Dudderar ,  John A. Gilbert ,  Bruce R. Peters ,  James A. Smith

Inventor： Christian P. Burger ,  Thomas D. Dudderar ,  John A. Gilbert ,  Bruce R. Peters ,  James A. Smith

IPC: G01N29/00 ,  G01H9/00 ,  G01J9/02 ,  G01N21/88 ,  G01N29/24

CPC classification number: G01N29/2418 ,  G01H9/006 ,  G01N21/88 ,  G01J2009/0226 ,  G01N2291/0423

Abstract: Ultrasonic surface examination, of interest in a variety of manufacturing and maintenance situations, is facilitated by a method which involves localized sensing of a surface wave by optical-fiber interferometry. The method is particularly applicable for examination of surfaces in confined spaces and wherever line-of-sight examination is difficult.

公开(公告)号：US4747688A

公开(公告)日：1988-05-31

申请号：US911935

申请日：1986-09-26

Applicant: Joseph M. Geary

Inventor： Joseph M. Geary

IPC: G01J9/02 ,  G01B9/02

CPC classification number: G01J9/02 ,  G01J2009/0211 ,  G01J2009/0226

Abstract: An incident light field is applied to the two separate front fiber faces of a pair of identical optical fibers which are initially held in a common plane. One fiber face is always kept stationary. The other fiber face may be moved either laterally in a plane common to the stationary face, or longitudinally into and out of the common plane. The output end of the device comprises two separate rear fiber faces that are held in a common plane. These faces are stationary. There is no lateral or longitudinal motion of one relative to the other. The light emerging from these two faces interferes in the far field. Straight line interference fringes whose spacing depends upon the lateral separation of the rear fiber faces are formed. The fringe modulation, however, depends upon the relative position of the front fiber faces. This modulation changes as one front face is scanned either laterally or longitudinally. The modulation changes with such motion is related to the degree of spatial or temporal coherence of the incident light field.

Abstract translation: 入射光场被施加到最初保持在公共平面中的一对相同光纤的两个分开的前纤维面上。 一个纤维面总是保持静止。 另一个纤维面可以在与固定面共同的平面中横向移动，或纵向进入和离开公共平面。 该装置的输出端包括保持在公共平面中的两个单独的后纤维面。 这些面是静止的。 没有一个相对于另一个的横向或纵向运动。 从这两个面孔出现的光线在远处干扰。 形成间隔取决于后纤维面的横向分离的直线干涉条纹。 然而，边缘调制取决于前纤维面的相对位置。 当一个正面被横向或纵向扫描时，该调制变化。 这种运动的调制变化与入射光场的空间或时间相干程度有关。

公开(公告)号：US4505588A

公开(公告)日：1985-03-19

申请号：US465215

申请日：1983-02-09

Applicant: Jacques E. Ludman ,  John L. Sampson ,  Henry J. Caulfield

Inventor： Jacques E. Ludman ,  John L. Sampson ,  Henry J. Caulfield

IPC: G01B9/02 ,  G01J9/02

CPC classification number: G01J9/02 ,  G01B9/02063 ,  G01B2290/10 ,  G01B2290/40 ,  G01J2009/0226

Abstract: A fiber stellar interferometer having a pair of adjustably movable focusing lenses, a pair of monomode optical fibers, a block of electro-optic material defining a pair of optical paths, means for controlling the effective path length of one of the optical paths and an intensity detector. Electromagnetic radiation emanating from a source, such as a star, is received at two separate locations by the focusing lenses which direct this electromagnetic radiation into two separate beams which are focused into each of the pair of monomode fibers, respectively. The monomode fibers direct these two beams into respective optical paths within the electro-optic block of material. The outputs from the two optical paths are combined and received by the intensity detector. Varying the effective path length of one of the optical paths alters the phase of the beam passing therethrough. As a consequence thereof the intensity of the output received by the detector varies accordingly. These varying intensities can be utilized to determine the size and shape of the source by conventional stellar intensity interferometer techniques.

Abstract translation: 一种具有一对可调节移动聚焦透镜的光纤恒星干涉仪，一对单模光纤，限定一对光路的电光材料块，用于控制一条光路的有效路径长度和强度 探测器。 从诸如恒星的源发出的电磁辐射通过聚焦透镜在两个分开的位置处被接收，该聚焦透镜将该电磁辐射分别引导到分别聚焦到该对单模光纤中的每一个中的两个单独的光束。 单模光纤将这两个光束引导到电光学材料块内的相应的光路中。 来自两个光路的输出被强度检测器组合和接收。 改变光路中的一个的有效路径长度改变通过其中的光束的相位。 因此，由检测器接收的输出的强度相应地变化。 这些变化的强度可以用于通过传统的恒星强度干涉仪技术来确定源的尺寸和形状。

公开(公告)号：US09658114B1

公开(公告)日：2017-05-23

申请号：US14986593

申请日：2015-12-31

Applicant: Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences

Inventor： Feng Tang ,  Xiangzhao Wang ,  Peng Feng ,  Fudong Guo ,  Yunjun Lu

IPC: G01M11/02 ,  G01J9/02

CPC classification number: G01J9/02 ,  G01J1/0437 ,  G01J2009/0223 ,  G01J2009/0226 ,  G01J2009/0261

Abstract: A device for measuring point diffraction interferometric wavefront aberration having an optical source, an optical splitter, a first light intensity and polarization regulator, a phase shifter, a second light intensity and polarization regulator, an ideal wavefront generator, an object precision adjusting stage, a measured optical system, an image wavefront detection unit, an image precision adjusting stage, and a data processing unit. A method for detecting wavefront aberration of the optical system by using the device is also disclosed.

公开(公告)号：US20150219501A1

公开(公告)日：2015-08-06

申请号：US14686616

申请日：2015-04-14

Applicant: California Incapacitated of Technology

Inventor： James Kent Wallace

IPC: G01J9/02

CPC classification number: G01J9/0215 ,  G01J9/00 ,  G01J9/02 ,  G01J2009/0226

Abstract: Hybrid sensors comprising Shack-Hartmann Wavefront Sensor (S-HWFS) and Zernike Wavefront Sensor (Z-WFS) capabilities are presented. The hybrid sensor includes a Z-WFS optically arranged in-line with a S-HWFS such that the combined wavefront sensor operates across a wide dynamic range and noise conditions. The Z-WFS may include the ability to introduce a dynamic phase shift in both transmissive and reflective modes.

Abstract translation: 提出了包括Shack-Hartmann波前传感器（S-HWFS）和Zernike波前传感器（Z-WFS）功能的混合传感器。 混合传感器包括与S-HWFS成线性配置的Z-WFS，使得组合的波前传感器在宽动态范围和噪声条件下工作。 Z-WFS可以包括在透射和反射模式中引入动态相移的能力。

公开(公告)号：US20140347659A1

公开(公告)日：2014-11-27

申请号：US14115575

申请日：2012-04-27

Applicant: Dominic Murphy ,  Kieran O'Manhoney

Inventor： Dominic Murphy ,  Kieran O'Manhoney

IPC: G01J3/02 ,  G01J3/28

CPC classification number: G01J3/0218 ,  G01J3/2803 ,  G01J3/2823 ,  G01J3/4531 ,  G01J9/02 ,  G01J9/0246 ,  G01J2009/0226

Abstract: A waveguide spectrum analyser comprises an input waveguide (10) for receiving a beam of electromagnetic radiation to be spectrally analysed, a plurality of output waveguides (14, 16) which are single mode for wavelengths longer than a certain minimum, a substantially wavelength independent splitter (18) for splitting the input radiation between the single-mode output waveguides, and an array (24) of radiation-sensitive detector elements (30). Each output waveguide has a respective exit port (20, 22) facing the detector array so that radiation from the exit port is diffracted onto the array. The separation of the exit ports and the distance to the detector array is selected such that at least for a range of wavelengths longer than the certain minimum a plurality of interference fringes are produced at the array each extending across sufficient detector elements to allow spatial sampling of the fringes above the Nyquist rate. Data processing means (26) is provided for sampling the detector array to capture an image of the fringes and transforming the captured image data to the frequency domain, preferably using HTP and/or DFTS processing techniques.

Abstract translation: 波导频谱分析仪包括用于接收要被频谱分析的电磁辐射束的输入波导（10），多于一个波长长于特定最小值的单模的多个输出波导（14,16），基本上不依赖于波长的分离器 （18），用于在单模输出波导之间分割输入辐射，以及辐射敏感检测器元件（30）的阵列（24）。 每个输出波导具有面向检测器阵列的相应出口（20,22），使得来自出口的辐射被衍射到阵列上。 选择出口的分离和到检测器阵列的距离，使得至少对于长于某一最小值的波长范围，在阵列处产生多个干涉条纹，每个干涉条纹遍及足够的检测器元件，以允许空间取样 奈奎斯特价格以上的边缘。 提供数据处理装置（26），用于对检测器阵列进行采样以捕获条纹图像，并优选使用HTP和/或DFTS处理技术将捕获的图像数据变换到频域。

公开(公告)号：US20130188194A1

公开(公告)日：2013-07-25

申请号：US13747235

申请日：2013-01-22

Applicant: California Institute of Technology

Inventor： James Kent Wallace

IPC: G01J9/02

CPC classification number: G01J9/0215 ,  G01J9/00 ,  G01J9/02 ,  G01J2009/0226

Abstract: Hybrid sensors comprising Shack-Hartmann Wavefront Sensor (S-HWFS) and Zernike Wavefront Sensor (Z-WFS) capabilities are presented. The hybrid sensor includes a Z-WFS optically arranged in-line with a S-HWFS such that the combined wavefront sensor operates across a wide dynamic range and noise conditions. The Z-WFS may include the ability to introduce a dynamic phase shift in both transmissive and reflective modes.

公开(公告)号：US20020122181A1

公开(公告)日：2002-09-05

申请号：US09910125

申请日：2001-07-20

Applicant: Medizinisches Laserzentrum Lubeck GmbH

Inventor： Peter Koch ,  Christian Scholz ,  Ralf Engelhardt

IPC: G01B009/02

CPC classification number: G01B9/02052 ,  G01B9/02056 ,  G01B9/02091 ,  G01B2290/35 ,  G01B2290/45 ,  G01D5/35303 ,  G01J2009/0226

Abstract: It is the case of an interferometric measuring arrangement for superimposing at least two light waves, with a first coupling means for coupling the light waves coming from a light source into a sample arm and into a reference arm, and with a second coupling means for superimposing the light waves coming from the reference arm and the sample arm, which are led to at least one detector. The light waves at least within the reference arm are exclusively led in at least one fiber guide which they do not leave on their path between the coupling means, and with which the sample arm extends on both sides of the first coupling means.

Abstract translation: 用于叠加至少两个光波的干涉测量装置的情况是具有用于将来自光源的光波耦合到样品臂中并进入参考臂的第一耦合装置，以及用于叠加的第二耦合装置 来自参考臂和样品臂的光波被引导到至少一个检测器。 至少在参考臂内的光波仅被引导到至少一个光纤引导件中，它们不在其连接装置之间的路径上留下，并且样本臂在第一耦合装置的两侧延伸。

公开(公告)号：US06396574B1

公开(公告)日：2002-05-28

申请号：US09524156

申请日：2000-03-14

Applicant: Chang Hee Lee ,  Sang Yung Shin ,  Kwang Uk Chu

Inventor： Chang Hee Lee ,  Sang Yung Shin ,  Kwang Uk Chu

IPC: G01N2100

CPC classification number: G01J1/4257 ,  G01J9/00 ,  G01J2009/0226 ,  G02B6/29319 ,  G02B6/29358 ,  G02B6/2938 ,  G02B6/29395 ,  H04B10/077 ,  H04B10/07955

Abstract: An apparatus for measuring the wavelength, optical power, and an optical signal-to-noise ratio (OSNR) of each optical signal in wavelength-division-multiplexing optical communication includes: elements for splitting a part of wavelength-division-multiplexed (WDM) signals, elements for amplifying the WDM signals and generating spontaneous emission light simultaneously, elements for reflecting a predetermined section of the spontaneous emission light and generating an optical reference signal, and elements for combining the optical reference signal with the part of the WDM signals split by the splitting elements and generating a combined light. The apparatus has components for filtering the combined light at a fixed temperature and generating a waveform which is the same as an optical spectrum of the combined light in the time domain. The apparatus includes elements for converting the waveform into an electrical signal and components for signal processing that measure the wavelength, the optical power, and the OSNR of the WDM signals.

Abstract translation: 用于测量波分复用光通信中每个光信号的波长，光功率和光信噪比（OSNR）的装置包括：用于将波分复用（WDM） 信号，用于放大WDM信号并同时产生自发发射光的元件，用于反射自发发射光的预定部分并产生光学参考信号的元件，以及用于将光学参考信号与WDM信号的一部分分开的元件 分离元件并产生组合光。 该装置具有用于在固定温度下对组合光进行滤波的部件，并产生与时域中的组合光的光谱相同的波形。 该装置包括用于将波形转换成电信号的元件和用于信号处理的组件，用于测量WDM信号的波长，光功率和OSNR。