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71. 发明授权

US07019883B2 Dynamic optical filter having a spatial light modulator 有权
公开(公告)号：US07019883B2
公开(公告)日：2006-03-28
申请号：US10115647
申请日：2002-04-03
申请人： John Moon , Alan D. Kersey , James Sirkis , James Dunphy , Joseph Pinto , Paul Szczepanek , Michael Davis
发明人： John Moon , Alan D. Kersey , James Sirkis , James Dunphy , Joseph Pinto , Paul Szczepanek , Michael Davis
IPC分类号： G02B26/00
CPC分类号： G02B6/4246 , G02B6/262 , G02B6/266 , G02B6/2713 , G02B6/272 , G02B6/278 , G02B6/2793 , G02B6/2931 , G02B6/29311 , G02B6/29313 , G02B6/29314 , G02B6/29395 , G02B6/29398 , G02B6/3516 , G02B6/356 , G02B6/3588 , G02B6/359 , G02B6/4226 , G02B26/0833 , G02B26/0841 , G02B27/1006 , G02B27/1073 , G02B27/108 , G02B27/1086 , G02B27/126 , G02B27/144 , G02B27/147 , H04J14/021 , H04J14/0213 , H04J14/0221 , H04Q2011/0009 , H04Q2011/0026
摘要： An dynamic optical filter 10 is provided to selectively attenuate or filter a wavelength band(s) of light (i.e., optical channel(s)) or a group(s) of wavelength bands of an optical WDM input signal 12. The optical filter is controllable or programmable to selectively provide a desired filter function. The optical filter 10 includes a spatial light modulator 36, which comprises an array of micromirrors 52 that effectively forms a two-dimensional diffraction grating mounted in a retro-reflecting configuration. Each optical channel 14 is dispersed separately or overlappingly onto the array of micro-mirrors 52 along a spectral axis or direction 55 such that each optical channel or group of optical channels are spread over a plurality of micromirrors to effectively pixelate each of the optical channels or input signal. Each channel 14 or group of channels may be selectively attenuated by flipping or tilting a selected number of micromirrors to thereby deflect a portion of the incident radiation away from the return optical path. The micro-mirrors operate in a digital manner by flipping between a first and second position in response to a control signal 56 provided by a controller 58 in accordance with an attenuation algorithm and an input command 60. The switching algorithm may provide a bit (or pixel) map or look-up table indicative of the state of each of the micro-mirrors 52 of the array to selectively attenuate the input signal and provide a modified output signal 38 at optical fiber 40.

72. 发明授权

US06988411B2 Fluid parameter measurement for industrial sensing applications using acoustic pressures 有权
标题翻译：使用声压的工业传感应用的流体参数测量
公开(公告)号：US06988411B2
公开(公告)日：2006-01-24
申请号：US10842068
申请日：2004-05-10
申请人： Daniel L. Gysling , Alan D. Kersey , James D. Paduano
发明人： Daniel L. Gysling , Alan D. Kersey , James D. Paduano
IPC分类号： G01N29/00
CPC分类号： G01H5/00 , G01N29/024 , G01N29/42 , G01N29/46 , G01N2291/0217 , G01N2291/0222 , G01N2291/0224 , G01N2291/02836 , G01N2291/02845 , G01N2291/02872 , G01N2291/106
摘要： In industrial sensing applications at least one parameter of at least one fluid in a pipe 12 is measured using a spatial array of acoustic pressure sensors 14,16,18 placed at predetermined axial locations x1, x2, x3 along the pipe 12. The pressure sensors 14,16,18 provide acoustic pressure signals P1(t), P2(t), P3(t) on lines 20,22,24 which are provided to signal processing logic 60 which determines the speed of sound amix of the fluid (or mixture) in the pipe 12 using acoustic spatial array signal processing techniques with the direction of propagation of the acoustic signals along the longitudinal axis of the pipe 12. Numerous spatial array-processing techniques may be employed to determine the speed of sound amix. The speed of sound amix is provided to logic 48, which calculates the percent composition of the mixture, e.g., water fraction, or any other parameter of the mixture, or fluid, which is related to the sound speed amix. The logic 60 may also determine the Mach number Mx of the fluid. The acoustic pressure signals P1(t), P2(t), P3(t) measured are lower frequency (and longer wavelength) signals than those used for ultrasonic flow meters, and thus is more tolerant to inhomogeneities in the flow. No external source is required and thus may operate using passive listening. The invention will work with arbitrary sensor spacing and with as few as two sensors if certain information is known about the acoustic properties of the system. The sensor may also be combined with an instrument, an opto-electronic converter and a controller in an industrial process control system.
摘要翻译：在工业感测应用中，使用放置在沿着管12的预定轴向位置x 1，x 2，x 3处的声压传感器14,16,18的空间阵列来测量管道12中的至少一种流体的至少一个参数。压力传感器14,16,18提供声压信号P 1（t），P 2（t），P 3（t）在线20,22,24上，其被提供给信号处理逻辑60，信号处理逻辑60使用声学空间阵列信号处理技术确定管12中的流体（或混合物）的声音混合速度，声信号沿着管12的纵向轴线传播的方向。可以采用许多空间阵列处理技术来确定混音的声速。逻辑48被提供给逻辑48，逻辑48计算混合物的组成百分比，例如水分或混合物的任何其它参数或与声音相关的流体加速_{混合。逻辑60还可以确定流体的马赫数Mx。测量的声压信号P 1（t），P 2（t），P 3（t）是较低的频率（和较长的波长）信号比用于超声波流量计的信号，因此更容忍流量的不均匀性。不需要外部来源，因此可以使用被动收听操作。如果关于系统的声学特性的某些信息已知，本发明将适用于任意的传感器间距，并且具有少至两个传感器。传感器还可以与工业过程控制系统中的仪器，光电转换器和控制器组合。}

73. 发明授权

US06934069B2 Chromatic dispersion compensation device having an array of micromirrors 有权
标题翻译：具有微镜阵列的色散补偿装置
公开(公告)号：US06934069B2
公开(公告)日：2005-08-23
申请号：US10298264
申请日：2002-11-15
申请人： John A. Moon , Alan D. Kersey , Jay W. Dawson , Joseph Pinto , James R. Dunphy , Michael A. Davis
发明人： John A. Moon , Alan D. Kersey , Jay W. Dawson , Joseph Pinto , James R. Dunphy , Michael A. Davis
IPC分类号： G02B6/26 , G02B6/34 , G02B6/42 , G02B26/08 , G02B27/10 , H04J14/02 , H04Q11/00 , G02B26/00 , H04B10/12
CPC分类号： G02B6/29311 , G02B6/262 , G02B6/266 , G02B6/29394 , G02B6/29395 , G02B6/4226 , G02B26/0833 , G02B26/0841 , G02B27/1086 , H04J14/021 , H04J14/0212 , H04J14/0213 , H04J14/0221 , H04Q2011/0009 , H04Q2011/0026
摘要： A chromatic dispersion compensation device selectively delays a respective portion of spectral sections of each respective optical channel of an optical WDM input signal to compensate each optical channel for dispersion compensation, and includes a spatial light modulator having a micromirror device with a two-dimensional array of micromirrors. The micromirrors tilt or flip between first and second positions in a “digital” fashion in response to a control signal provided by a controller in accordance with a switching algorithm and an input command. A collimator, diffraction gratings, and Fourier lens collectively collimate, disperse and focus the optical input channels onto the array of micromirrors. Each optical channel is focused onto micromirrors of the micromirror device, which effectively pixelates the optical channels. To compensate an optical channel for chromatic dispersion, a portion of the spectral sections of each channel is delayed a desired time period by tilting an array of mirrors (i.e., spectral array) disposed in each spectral section at different spatial positions on the micromirror device.
摘要翻译：色散补偿装置选择性地延迟光WDM输入信号的每个相应光通道的光谱部分的相应部分以补偿每个光信道用于色散补偿，并且包括空间光调制器，具有具有二维阵列的微镜器件微镜。响应于由控制器根据切换算法和输入命令提供的控制信号，微镜以“数字”方式在第一和第二位置之间倾斜或翻转。准直仪，衍射光栅和傅立叶透镜共同准直，分散并将光学输入通道聚焦到微镜阵列上。每个光通道聚焦到微镜器件的微镜上，这有效地使光通道成像。为了补偿用于色散的光信道，通过在微镜装置上的不同空间位置倾斜设置在每个光谱部分中的反射镜阵列（即，光谱阵列），将每个通道的光谱部分的一部分延迟期望的时间段。

74. 发明授权

US06681067B1 Method for selective erasing/apodization of the index of refraction of an optical waveguide and an optical waveguide modified by the method 有权
$Method for selective erasing/apodization of the index of refraction of an optical waveguide and an optical waveguide modified by the method$
标题翻译：用于通过该方法修改的光波导和光波导的折射率的选择性擦除/变迹的方法
公开(公告)号：US06681067B1
公开(公告)日：2004-01-20
申请号：US09706438
申请日：2000-11-03
申请人： Alan D. Kersey
发明人： Alan D. Kersey
IPC分类号： G02B634
CPC分类号： G02B6/02185 , G02B6/02085 , G02B6/02152
摘要： A method for erasing some or all of at least some of the grating elements of a grating inscribed in an optical waveguide such as an optical fiber or a cane structure (a more rigid optical waveguide), or, more generally, for selectively altering the index of refraction of a span of an optical waveguide, and products provided by the method. A temperature profile suitable for achieving a predetermined desired apodization (shaping of the grating strength) is determined, and then a focused laser beam, from for example a CO2 laser, is directed to a target site on the optical waveguide selected as a suitable point from which to direct the laser beam and so introduce heat into the optical waveguide. The laser beam is held on the target site only so long as is necessary to create at least a portion of the temperature profile. The laser beam may then be redirected to other target sites on the optical waveguide, or may be swept along the optical waveguide at a rate suitable for creating further portions of the temperature profile. The laser beam may also be applied to an optical waveguide not having a conventional (small-scale) grating so as to create large-scale gratings, such as so-called long-period gratings, and including aperiodic and higher-functionality large-scale gratings.
摘要翻译：一种用于擦除光纤（例如光纤或手镯结构（更刚性的光波导））中内接的光栅的至少一些光栅元件的一些或全部的方法，或更一般地，用于选择性地改变指数光波导跨度的折射率，以及由该方法提供的产品。确定适合于实现预定的所需变迹（光栅强度的整形）的温度曲线，然后将来自例如CO 2激光的聚焦激光束定向到选自作为适当点的光波导上的目标位置其引导激光束并因此将热量引入光波导中。激光束仅在需要产生至少一部分温度分布的情况下保持在目标位置上。然后可以将激光束重定向到光波导上的其它目标位置，或者可以以适于产生温度分布的其它部分的速率沿着光波导扫掠。激光束也可以应用于不具有常规（小规模）光栅的光波导，以便产生诸如所谓的长周期光栅的大规模光栅，并且包括非周期性和更高功能性的大规模光栅光栅。

75. 发明授权

US06489606B1 Bragg grating sensor system with spectral response or code division multiplexing 有权
标题翻译：具有光谱响应或码分复用的布拉格光栅传感器系统
公开(公告)号：US06489606B1
公开(公告)日：2002-12-03
申请号：US09545792
申请日：2000-04-07
申请人： Alan D. Kersey , Robert A. Rubino , James R. Dunphy
发明人： Alan D. Kersey , Robert A. Rubino , James R. Dunphy
IPC分类号： G02B600
CPC分类号： G01L1/246 , G01D5/35303 , G02B6/2932
摘要： The present invention provides a sensor system for sensing a parameter, comprising an optical source, coupler and signal processor system in combination with multiple structured fiber Bragg gratings. The optical source, coupler and signal processor system provide an optical source signal to the multiple structured fiber Bragg gratings. The optical source, coupler and signal processor system also responds to multiple structured fiber Bragg grating signals, for providing an optical source, coupler and signal processor system signal containing information about a sensed parameter. The multiple structured fiber Bragg gratings respond to the optical source signal, and further respond to the sensed parameter, for providing the multiple structured fiber Bragg grating signals containing information about a complex superposition of spectral responses or codes related to the sensed parameter. Each of the multiple structured fiber Bragg gratings includes a respective broadband spectral response or code related to the sensed parameter.
摘要翻译：本发明提供一种用于感测参数的传感器系统，包括与多个结构化光纤布拉格光栅组合的光源，耦合器和信号处理器系统。光源，耦合器和信号处理器系统向多个结构化光纤布拉格光栅提供光源信号。光源，耦合器和信号处理器系统还响应于多个结构化光纤布拉格光栅信号，用于提供包含关于感测参数的信息的光源，耦合器和信号处理器系统信号。多个结构化光纤布喇格光栅响应于光源信号，并进一步响应于感测参数，以提供包含关于光谱响应或与感测参数相关的代码的复叠加的信息的多个结构化光纤布拉格光栅信号。多个结构化光纤布喇格光栅中的每一个包括相应的宽带光谱响应或与感测参数相关的代码。

76. 发明授权

US06354147B1 Fluid parameter measurement in pipes using acoustic pressures 有权
标题翻译：使用声压测量管道中的流体参数
公开(公告)号：US06354147B1
公开(公告)日：2002-03-12
申请号：US09344094
申请日：1999-06-25
申请人： Daniel L. Gysling , Alan D. Kersey , James D. Paduano
发明人： Daniel L. Gysling , Alan D. Kersey , James D. Paduano
IPC分类号： G01N2900
CPC分类号： G01N29/42 , G01N29/024 , G01N29/46 , G01N2291/0222 , G01N2291/0224 , G01N2291/02836 , G01N2291/02845 , G01N2291/02872 , G01N2291/106
摘要： At least one parameter of at least one fluid in a pipe 12 is measured using a spatial array of acoustic pressure sensors 14,16,18 placed at predetermined axial locations x1,x2,x3 along the pipe 12. The pressure sensors 14,16,18 provide acoustic pressure signals P1(t), P2(t), P3(t) on lines 20,22,24 which are provided to signal processing logic 60 which determines the speed of sound amix of the fluid (or mixture) in the pipe 12 using acoustic spatial array signal processing techniques with the direction of propagation of the acoustic signals along the longitudinal axis of the pipe 12. Numerous spatial array processing techniques may be employed to determined the speed of sound amix. The speed of sound amix is provided to logic 48 which calculates the percent composition of the mixture, e.g., water fraction, or any other parameter of the mixture or fluid which is related to the sound speed amix. The logic 60 may also determine the Mach number Mx of the fluid. The acoustic pressure signals P1(t), P2(t), P3(t) measured are lower frequency (and longer wavelength) signals than those used for ultrasonic flow meters, and thus is more tolerant to inhomogeneities in the flow. No external source is required and thus may operate using passive listening. The invention will work with arbitrary sensor spacing and with as few as two sensors if certain information is known about the acoustic properties of the system.
摘要翻译：使用放置在沿着管12的预定轴向位置x1，x2，x3处的声压传感器14,16,18的空间阵列来测量管道12中的至少一种流体的至少一个参数。压力传感器14,16， 18提供了线路20,22,24上的声压信号P1（t），P2（t），P3（t），其被提供给信号处理逻辑60，信号处理逻辑60确定了流体（或混合）中的声音amix的速度管12使用声学空间阵列信号处理技术与沿着管12的纵向轴线的声信号的传播方向。可以采用许多空间阵列处理技术来确定声音的速度。声音amix的速度被提供给逻辑48，逻辑48计算混合物的组成百分比，例如水分，或与声速amix相关的混合物或流体的任何其它参数。逻辑60还可以确定流体的马赫数Mx。测得的声压信号P1（t），P2（t），P3（t）比用于超声波流量计的声压信号P1（t），P2（t），P3（t）更低频率（和更长波长）的信号，因此更容忍流量的不均匀性。不需要外部来源，因此可以使用被动收听操作。如果关于系统的声学特性的某些信息已知，本发明将适用于任意的传感器间距，并且具有少至两个传感器。

77. 发明授权

US06252656B1 Apparatus and method of seismic sensing systems using fiber optics 有权
标题翻译：使用光纤的地震检测系统的装置和方法
公开(公告)号：US06252656B1
公开(公告)日：2001-06-26
申请号：US09145624
申请日：1998-09-02
申请人： Jian-Qun Wu , Alan D. Kersey , Robert J. Maron
发明人： Jian-Qun Wu , Alan D. Kersey , Robert J. Maron
IPC分类号： G01N2100
CPC分类号： G01V1/22 , G01D5/35312 , G08C23/06
摘要： The present invention provides a seismic sensing system having at least one sensor, transducer, optical source and detection unit, optical fiber and measurement unit. The sensor responds to a seismic disturbance, for providing a sensor signal containing information about the seismic disturbance. The sensor may be a geophone that detects vibrations passing though rocks, soil etc, and provides an electrical voltage sensor signal. The transducer responds to the sensor signal, for providing a transducer force containing information about the sensor signal. The transducer may be a piezoelectric, magnetostrictive or electrostrictive transducer. The optical source provides an optical signal through the fiber. The optical fiber responds to the transducer force, changes an optical parameter or characteristic of the optical signal depending on the change in length of the optical fiber, for providing a transduced optical signal containing information about the transducer force. The optical fiber may have one or more fiber Bragg Gratings therein arranged in relation to the transducer. The measurement unit responds to the transduced optical signal, for providing a measurement unit signal containing information about the seismic disturbance.
摘要翻译：本发明提供一种具有至少一个传感器，换能器，光源和检测单元，光纤和测量单元的地震检测系统。传感器响应地震干扰，提供包含有关地震干扰信息的传感器信号。传感器可以是检测通过岩石，土壤等的振动的地震检波器，并提供电压传感器信号。传感器响应传感器信号，用于提供包含有关传感器信号的信息的传感器力。换能器可以是压电，磁致伸缩或电致伸缩换能器。光源通过光纤提供光信号。光纤响应于传感器的力，根据光纤的长度变化来改变光学信号的光学参数或特性，以提供包含关于换能器力的信息的转换光学信号。光纤可以在其中相对于换能器布置有一个或多个光纤布拉格光栅。测量单元响应于转换的光信号，用于提供包含有关地震干扰的信息的测量单元信号。

78. 发明授权

US06249623B1 Temperature stabilized broadband optical source and method of using same 失效
标题翻译：温度稳定宽带光源及其使用方法
公开(公告)号：US06249623B1
公开(公告)日：2001-06-19
申请号：US09184465
申请日：1998-10-26
申请人： Heather J. Patrick , Alan D. Kersey
发明人： Heather J. Patrick , Alan D. Kersey
IPC分类号： G02B626
CPC分类号： G02B6/02176 , G02B6/02095 , H01S3/005 , H01S3/0078
摘要： A method and apparatus for correcting changes in the mean wavelength of a broadband optical source due to changes in temperature. An optical filter is placed so as to filter the output of source, the filter being selected so that, as a function of temperature, its center wavelength changes as fast or faster than the wavelength centroid of the source.
摘要翻译：用于校正由于温度变化引起的宽带光源的平均波长变化的方法和装置。放置滤光器以过滤源的输出，选择滤光片，使得作为温度的函数，其中心波长以比源的波长重心快或快的速度变化。

79. 发明授权

US5892860A Multi-parameter fiber optic sensor for use in harsh environments 失效
标题翻译：用于恶劣环境的多参数光纤传感器
公开(公告)号：US5892860A
公开(公告)日：1999-04-06
申请号：US786704
申请日：1997-01-21
申请人： Robert J. Maron , Alan D. Kersey
发明人： Robert J. Maron , Alan D. Kersey
IPC分类号： G01D5/353 , G01K5/52 , G01P15/093 , G02B6/00
CPC分类号： G01L11/02 , G01D5/35383 , G01K5/52 , G01P15/093
摘要： A sensor capable of measuring a number of physical parameters in a harsh environment includes a plurality of intrinsic fiber optic sensor elements formed within a core of an optical fiber, the optical fiber being disposed within a capillary tube made of a high strength, corrosion resistant material. The sensor is located at a distal end of the capillary tube, and the capillary tube is mounted in a monitoring location, such as mounted to the casing of an electrically submersible pump (ESP), such that the sensor can be utilized to measure physical parameters, including static and dynamic pressure, temperature, acceleration and acoustic signals, at the monitoring location. Each sensor is constructed such that a reference element, such as a rigid element, isolates a reference location in the optical fiber from mechanically induced strain. A Bragg grating sensing element is positioned with respect to the reference element, and responsive to an optical signal and to a strain associated with a respective measurand field for providing an optical sensing signal related to a magnitude of the respective measurand field.
摘要翻译：能够在恶劣环境下测量物理参数的传感器包括形成在光纤芯中的多个本征光纤传感器元件，该光纤设置在由高强度耐腐蚀材料制成的毛细管内。传感器位于毛细管的远端，并且毛细管安装在监测位置，例如安装在电潜泵（ESP）的壳体上，使得传感器可用于测量物理参数，包括静态和动态压力，温度，加速度和声学信号。每个传感器被构造成使得诸如刚性元件的参考元件将光纤中的参考位置与机械感应应变隔离开。布拉格光栅感测元件相对于参考元件定位，并且响应于光学信号和与相应被测场相关联的应变，以提供与相应被测场的幅度相关的光学感测信号。

80. 发明授权

US5706079A Ultra-high sensitivity transducer with chirped bragg grating relector 失效
标题翻译：具有啁啾布拉格光栅反射器的超高灵敏度传感器
公开(公告)号：US5706079A
公开(公告)日：1998-01-06
申请号：US536028
申请日：1995-09-29
申请人： Alan D. Kersey
发明人： Alan D. Kersey
IPC分类号： G01D5/353 , G01C3/08 , G01B11/02
CPC分类号： G01D5/35316 , G01D5/35345
摘要： A transducer and measurement system includes a fiber Bragg grating which a regular variation of spacing of partially reflecting surfaces, known as a chirp, either formed or induced therein and which is capable of reflecting energy having a predetermined wavelength. When the fiber Bragg grating is subjected to a strain, such as by a change in dimension or shape of a transducing element to which it is attached with change of a physical parameter to which the transducing element or the fiber Bragg grating is exposed, the location within the fiber Bragg grating which effectively reflects the predetermined wavelength will be formed (e.g. when the chirp is induced) or altered as the strain alters spacing of partially reflecting surface within the fiber Bragg grating allowing long optical fibers, such as are used in magnetometers and hydrophones, to be simulated with short optical fibers including a fiber Bragg grating.
摘要翻译：换能器和测量系统包括光纤布拉格光栅，其具有被称为啁啾的部分反射表面的间隔的规则变化，其形成或诱导，并且能够反射具有预定波长的能量。当光纤布拉格光栅受到应变时，例如通过改变传感元件的尺寸或形状，随着转换元件或光纤布拉格光栅所暴露的物理参数的变化，光纤布拉格光栅所附着的位置将形成有效反射预定波长的光纤布拉格光栅（例如，当啁啾被感应时），或随着应变改变光纤布拉格光栅内的部分反射表面的间隔而改变，允许长光纤，例如用于磁力计和水听器，用包括光纤布拉格光栅的短光纤进行模拟。

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