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81. 发明授权

US06519388B1 Tube-encased fiber grating 有权
标题翻译：管状光纤光栅
公开(公告)号：US06519388B1
公开(公告)日：2003-02-11
申请号：US09455865
申请日：1999-12-06
申请人： Mark R. Fernald , Timothy J. Bailey , Matthew B. Miller , James M. Sullivan , Michael A. Davis , Peter Ogle , Alan D. Kersey , Martin A. Putnam , Robert N. Brucato , Paul E. Sanders
发明人： Mark R. Fernald , Timothy J. Bailey , Matthew B. Miller , James M. Sullivan , Michael A. Davis , Peter Ogle , Alan D. Kersey , Martin A. Putnam , Robert N. Brucato , Paul E. Sanders
IPC分类号： G02B634
CPC分类号： G02B6/022 , G02B6/0218
摘要： A tube-encased fiber grating includes an optical fiber 10 having at least one Bragg grating 12 impressed therein which is embedded within a glass capillary tube 20. Light 14 is incident on the grating 12 and light 16 is reflected at a reflection wavelength &lgr;1. The shape of the tube 20 may be other geometries (e.g., a “dogbone” shape) and/or more than one concentric tube may be used or more than one grating or pair of gratings may be used. The fiber 10 may be doped at least between a pair of gratings 150,152, encased in the tube 20 to form a tube-encased compression-tuned fiber laser or the grating 12 or gratings 150,152 may be constructed as a tunable DFB fiber laser encased in the tube 20. Also, the tube 20 may have an inner region 22 which is tapered away from the fiber 10 to provide strain relief for the fiber 10, or the tube 20 may have tapered (or fluted) sections 27 which have an outer geometry that decreases down to the fiber 10 and provides added fiber pull strength. Also, the tube-encased grating 12 exhibits lower mode coupling from the fiber core to the cladding modes due to the increased diameter of the cladding where the tube 20 is fused to the fiber 10 where the grating is located 12.
摘要翻译：管状光纤光栅包括光纤10，其具有嵌入其中的至少一个布拉格光栅12，该布拉格光栅12嵌入玻璃毛细管20内。光14入射到光栅12上，光16以反射波长lambd1反射。管20的形状可以是其他几何形状（例如，“狗骨”形状）和/或可以使用多于一个的同心管，或者可以使用多于一个的光栅或一对光栅。纤维10可以至少掺杂在一对光栅150,152之间，封装在管20中以形成管封装的压缩调谐光纤激光器，或者光栅12或光栅150,152可被构造为包含在该光纤12中的可调DFB光纤激光器。管20也可以具有内部区域22，该内部区域22远离纤维10逐渐变细，以为纤维10提供应变消除，或者管20可以具有锥形（或凹槽）部分27，其具有外部几何形状降低到纤维10并提供增加的纤维拉伸强度。此外，由于包层的直径增加，管20被熔合到光栅位于12处的光纤10，管状光栅12表现出从纤维芯到包层模式的较低模式耦合。

82. 发明授权

US06285806B1 Coherent reflectometric fiber Bragg grating sensor array 失效
标题翻译：相干反射光纤布拉格光栅传感器阵列
公开(公告)号：US06285806B1
公开(公告)日：2001-09-04
申请号：US09093827
申请日：1998-05-31
申请人： Alan D. Kersey , Anthony Dandridge , Sandeep T. Vohra
发明人： Alan D. Kersey , Anthony Dandridge , Sandeep T. Vohra
IPC分类号： G02B600
CPC分类号： G01D5/35383 , G01H9/004 , G01M11/3118
摘要： A fiber optic sensor array has multiple segments, each capable of detecting a physical condition such as an acoustic wave. The segments are separated by weak reflectors such as fiber optic Bragg gratings. Light from a light source is input into the input end of the array. Light reflected by each of the reflectors has a phase shift representing the effects of the physical condition on all of the segments from the input end to that reflector. To address a specific reflector, the return light is demultiplexed. This demultiplexing is done by modulating the light input into the input end of the array with a pseudo-random bit sequence and correlating the output with a time-shifted version of the pseudo-random bit sequence to isolate the part of the output caused by that reflector. To address a specific segment, the phase shifts from two adjacent reflectors are determined. The return light can be strengthened by mixing it with a portion of the light picked off from the light source.
摘要翻译：光纤传感器阵列具有多个段，每个段能够检测诸如声波的物理条件。这些段由诸如光纤布拉格光栅的弱反射器分开。来自光源的光被输入到阵列的输入端。由每个反射器反射的光具有代表从输入端到该反射器的所有段的物理条件的影响的相移。为了寻址特定的反射器，返回光被解复用。这种解复用是通过用伪随机比特序列调制输入到阵列的输入端的光进行的，并将输出与伪随机比特序列的时移版本进行相关，以隔离由该随机比特序列引起的输出部分反射器。为了寻址特定的段，确定了两个相邻反射器的相移。可以通过将返回光与从光源拾取的光的一部分混合来加强返回光。

83. 发明授权

US06274863B1 Selective aperture arrays for seismic monitoring 有权
标题翻译：用于地震监测的选择性孔径阵列
公开(公告)号：US06274863B1
公开(公告)日：2001-08-14
申请号：US09360879
申请日：1999-07-23
申请人： Alan D. Kersey
发明人： Alan D. Kersey
IPC分类号： G01B902
CPC分类号： G01H9/004 , G01V1/16
摘要： A seismic sensing device has a light source, detection measuring and processing device in combination with an optical seismic sensor reconfigurable array. The light source, detection measuring and processing device provides a selective optical signal to the optical seismic sensor reconfigurable array, and responds to an optical seismic sensor reconfigurable array signal, for providing information about a seismic force to be sensed. The optical seismic sensor reconfigurable array responds to the selective optical signal, and responds to the seismic force, for providing an optical seismic sensor reconfigurable array signal containing information about the seismic force over at least one selective length of the optical seismic sensor reconfigurable array. The optical seismic sensor reconfigurable array includes an optical fiber having optical seismic sensors, each having at least one sensor coil arranged between a respective adjacent Fiber Bragg Grating partial reflector pair having a selectable wavelength. The optical seismic sensor reconfigurable array includes a common optical seismic sensor having a sensor coil arranged between both first and second adjacent Fiber Bragg Grating partial reflector pairs having first and second selectable wavelengths &lgr;1, &lgr;2.
摘要翻译：地震传感装置具有与光学地震传感器可重构阵列相结合的光源，检测测量和处理装置。光源，检测测量和处理装置向光学地震传感器可重构阵列提供选择性光信号，并且响应于光学地震传感器可重构阵列信号，用于提供关于要感测的地震力的信息。光学地震传感器可重构阵列响应选择性光信号并响应地震力，用于提供光学地震传感器可重构阵列信号，其包含关于地震力在光学地震传感器可重构阵列的至少一个选择长度上的信息。光学地震传感器可重构阵列包括具有光学地震传感器的光纤，每个光纤具有布置在具有可选波长的相应的相邻光纤布拉格光栅部分反射器对之间的至少一个传感器线圈。光学地震传感器可重新配置阵列包括普通的光学地震传感器，其具有布置在具有第一和第二可选择波长lambd1，lambd2的第一和第二相邻光纤布拉格光栅部分反射器对之间的传感器线圈。

84. 发明授权

US5986749A Fiber optic sensing system 失效
标题翻译：光纤传感系统
公开(公告)号：US5986749A
公开(公告)日：1999-11-16
申请号：US933544
申请日：1997-09-19
申请人： Jian-Qun Wu , Arthur D. Hay , Alan D. Kersey
发明人： Jian-Qun Wu , Arthur D. Hay , Alan D. Kersey
IPC分类号： G01D5/353 , G01V1/22 , G08C23/06 , G01N21/00
CPC分类号： G01V1/22 , G01D5/35312 , G08C23/06
摘要： A fiber optic sensor includes a sensor element responsive to a property or condition of a material, such a resistivity, capacitance, inductance, frequency, etc., for providing an output voltage signal that is dependent upon the property or condition of the material. The sensor further includes an optical-to-electrical conversion element, such as a photo detector or a solar cell, that converts an optical signal (photo detector driving optical signal) carried by an optical fiber into an electrical signal. The electrical signal is applied to the sensor element, and in response, the sensor element provides the output electrical signal. The output electrical signal is applied to a measurement device, such as a piezoelectric element, having at least one dimension that varies with changes in the output electrical signal. An optical strain sensor, such as a Bragg grating or Fabry Perot interferometer, is mounted to the measurement device such that changes in the dimension of the measurement device causes changes in the strain of the optical strain sensor. These changes in strain are detected and related to the property or condition of the material. The fiber optic sensor is particularly useful as a resistivity sensor for measuring the resistivity of a fluid. For example, the resistivity of a fluid mixture of oil and water can be measured for determining the relative water and oil content in the fluid mixture. In this configuration, the sensor element includes a pair of spaced apart conductive elements. The output electrical power from the photo detector is applied to the conductive elements and the fluid is passed between the conductive elements. The output voltage from the conductive elements varies in relation to the resistivity of the fluid sample between the conductive elements.
摘要翻译：光纤传感器包括响应材料的性质或状态的传感器元件，例如电阻率，电容，电感，频率等，用于提供取决于材料的性质或状况的输出电压信号。传感器还包括将由光纤携带的光信号（光检测器驱动光信号）转换为电信号的光电转换元件，例如光电检测器或太阳能电池。电信号被施加到传感器元件，并且作为响应，传感器元件提供输出电信号。输出电信号被施加到诸如压电元件的测量装置，其具有随输出电信号的变化而变化的至少一个尺寸。诸如布拉格光栅或法布里珀罗干涉仪之类的光学应变传感器被安装到测量装置上，使得测量装置的尺寸的变化导致光学应变传感器的应变的变化。检测到这些应变变化，并与材料的性质或状况有关。光纤传感器特别适用于测量流体电阻率的电阻率传感器。例如，可以测量油和水的流体混合物的电阻率，以确定流体混合物中的相对水和油的含量。在该结构中，传感器元件包括一对间隔开的导电元件。来自光检测器的输出电功率被施加到导电元件，并且流体在导电元件之间通过。来自导电元件的输出电压相对于导电元件之间的流体样品的电阻率而变化。

85. 依法登记的发明

USH1813H Spectrally-selective fiber transmission filter system 失效
标题翻译：光谱选择性光纤传输滤波系统
公开(公告)号：USH1813H
公开(公告)日：1999-11-02
申请号：US154419
申请日：1993-11-19
申请人： Alan D. Kersey
发明人： Alan D. Kersey
IPC分类号： G02B6/34 , H01S3/83
CPC分类号： G02B6/29349 , G02B6/29317 , G02B6/29356 , G02B6/29368
摘要： An in-line, spectrally-selective fiber Fabry-Perot transmission filter includes an optical fiber piece having a broad-band mirror and a narrow-band Bragg grating element formed therein, the mirror and the grating forming a Fabry-Perot resonant cavity therebetween. The filter may be used to form part of a fiber ring laser configuration. The combination of the broad-band mirror and the narrow-band Bragg grating element in an optical fiber piece can also be formed into a spectrally-selective fiber Michelson filter.
摘要翻译：一种在线光谱选择性光纤法布里 - 珀罗透射滤光器包括具有宽带反射镜和形成在其中的窄带布拉格光栅元件的光纤片，镜和光栅在其间形成法布里 - 珀罗谐振腔。滤波器可以用于形成光纤环激光器配置的一部分。光纤片中的宽带反射镜和窄带布拉格光栅元件的组合也可以形成为光谱选择性光纤迈克尔逊滤光片。

86. 发明授权

US5479094A Polarization insensitive current and magnetic field optic sensor 失效
标题翻译：极化不敏感电流和磁场光学传感器
公开(公告)号：US5479094A
公开(公告)日：1995-12-26
申请号：US427461
申请日：1995-04-24
申请人： Ronald D. Esman , Alan D. Kersey , Michael J. Marrone
发明人： Ronald D. Esman , Alan D. Kersey , Michael J. Marrone
IPC分类号： G01R15/24 , G01R33/032 , G01R33/32
CPC分类号： G01R33/0322 , G01R15/246
摘要： A sensor system includes a sensor head, an optical source, and a measurement apparatus. The sensor head includes a beamsplitter having first, second, third, and fourth ports, the beamsplitter being responsive to light selectively applied to the first, second and third ports for passing light of a first input polarization state from the first port to the second port, for passing light of a second input polarization state orthogonal to the first input polarization state from the first port to the third port, and for collectively passing light of a first output polarization state and light of a second output polarization state orthogonal to the first output polarization state from the third port to the fourth port. The optical source means provides light to the first port. The sensor head further includes a bidirectional polarimetric sensor responsive to polarized light output by the beamsplitter at the second and third ports and to an electromagnetic field applied to the polarimetric sensor for producing first polarized light at said third port and for producing second polarized light at said second port. The first and second polarized light have polarization states each of which varies as a function of the electromagnetic field and the polarization state of the light output by the beamsplitter at the other one of the second and third ports. The measurement means is responsive to light from the fourth port for producing an output signal indicative of the electromagnetic field strength.
摘要翻译：传感器系统包括传感器头，光源和测量装置。传感器头包括具有第一，第二，第三和第四端口的分束器，分束器响应于选择性地施加到第一，第二和第三端口的光，以将第一输入偏振状态的光从第一端口传递到第二端口用于将与第一输入偏振态正交的第二输入偏振状态的光从第一端口传递到第三端口，并且用于共同地将第一输出偏振状态的光和与第一输出正交的第二输出偏振状态的光通过从第三端口到第四端口的极化状态。光源装置向第一端口提供光。传感器头还包括响应于在第二和第三端口处由分束器输出的偏振光的双向偏振光学传感器，以及施加到偏振传感器的电磁场，用于在所述第三端口产生第一偏振光，并在所述第三端口处产生第二偏振光第二个港口。第一和第二偏振光具有各自的极化状态，其各自随着电磁场和由分束器在第二和第三端口中的另一个输出的光的偏振状态而变化。测量装置响应于来自第四端口的光，以产生指示电磁场强度的输出信号。

87. 发明授权

US5319440A Fiber optic gyroscopes with depolarized light 失效
标题翻译：具有去极化光的光纤陀螺仪
公开(公告)号：US5319440A
公开(公告)日：1994-06-07
申请号：US934221
申请日：1992-08-25
申请人： Alan D. Kersey , William K. Burns , Robert P. Moeller
发明人： Alan D. Kersey , William K. Burns , Robert P. Moeller
IPC分类号： G01C19/72 , G01C19/64
CPC分类号： G01C19/721
摘要： A depolarized fiber optic gyroscope with a detector for detecting a rotat about an axis of rotation and a method therefor is disclosed. The gyroscope includes a depolarized light source for generating the depolarized light; a gyro coil for conducting depolarized light about the axis of rotation, the gyro coil including a coil of a non-polarization preserving fiber having first and second ends; a depolarizer with first and second ports for eliminating birefringence induced scale factor variations caused by the non-polarization preserving fiber, the first port of the depolarizer being coupled to the first end of the gyro coil; and a coupler device for coupling the second end of the gyro coil, the second port of the depolarizer, the detector and the depolarized light source, without utilizing a polarizer.
摘要翻译：公开了一种具有用于检测围绕旋转轴线的旋转的检测器的去极化光纤陀螺仪及其方法。陀螺仪包括用于产生去极化光的去极化光源; 用于对旋转轴线进行去偏光的陀螺线圈，所述陀螺线圈包括具有第一端和第二端的非偏振保留光纤的线圈; 具有第一和第二端口的消偏振器，用于消除由非偏振保留光纤引起的双折射引起的比例因子变化，去偏振器的第一端口耦合到陀螺仪线圈的第一端; 以及用于耦合陀螺仪线圈的第二端，去极化器的第二端口，检测器和去极化光源的耦合器装置，而不使用偏振器。

88. 发明授权

US5104222A System and method for minimizing input polarization-induced phase noise in an interferometric fiber-optic sensor depolarized input light 失效
标题翻译：用于在干涉光纤传感器去极化输入光中最小化输入偏振引起的相位噪声的系统和方法
公开(公告)号：US5104222A
公开(公告)日：1992-04-14
申请号：US584221
申请日：1990-09-18
申请人： Alan D. Kersey , Michael J. Marrone , Anthony Dandridge
发明人： Alan D. Kersey , Michael J. Marrone , Anthony Dandridge
IPC分类号： G01D5/353
CPC分类号： G01D5/35303
摘要： A system and method for minimizing polarization-induced phase noise in an interferometric fiber sensor is disclosed. The system includes an optical source of light; a single mode input fiber; means coupled between the optical source and the input fiber for scrambling the polarization state of the light from the optical source at a first frequency to effectively produce and pass depolarized light to the input fiber; an interferometric fiber sensor responsive to light from the input fiber for producing at its output an interference pattern proportional to a phase shift produced by a field being sensed by the interferometric fiber sensor; detection means responsive to the interference pattern for developing a photocurrent signal averaged over a period of time longer than the period of the first frequency; and demodulation means responsive to the photocurrent signal for producing an electrical output signal substantially proportional to the phase shift produced by the field being sensed by the interferometric sensor.
摘要翻译：公开了一种用于使干涉光纤传感器中的偏振相位噪声最小化的系统和方法。该系统包括光源光源; 单模输入光纤; 耦合在所述光源和所述输入光纤之间的装置，用于以第一频率扰乱来自所述光源的光的偏振状态，以有效地产生并将去偏振光传递到所述输入光纤; 响应于来自输入光纤的光的干涉光纤传感器，用于在其输出处产生与由干涉光纤传感器感测的场产生的相移成比例的干涉图案; 响应于所述干涉图案的检测装置，用于显影在比所述第一频率的周期长的时间段内平均的光电流信号; 以及响应于光电流信号的解调装置，用于产生基本上与由干涉测量传感器感测的场产生的相移成比例的电输出信号。

89. 发明授权

US4678909A Optical pressure sensing apparatus 失效
标题翻译：光压感测装置
公开(公告)号：US4678909A
公开(公告)日：1987-07-07
申请号：US810324
申请日：1985-11-25
申请人： David A. Jackson , Michael Corke , Alan D. Kersey , Julian D. C. Jones
发明人： David A. Jackson , Michael Corke , Alan D. Kersey , Julian D. C. Jones
IPC分类号： G01D5/353 , G01L11/02 , G01B11/02
CPC分类号： G01L11/025 , G01D5/35303
摘要： Optical pressure sensing apparatus comprises an optical fibre interferometer arranged to sense the movement of a pressure responsive element and produce an interference signal at its output which can be monitored and processed to measure changes in the pressure applied to the pressure responsive element. The interferometer comprises a signal arm coupled to the pressure responsive element and a fixed reference arm. A light source supplies light to the input of the interferometer via an optical fibre and monitoring and processing electronics connected to the output determine the optical phase shift between the light beams propagated in the signal and reference arms and produce a pressure reading.
摘要翻译： PCT No.PCT / GB85 / 00136 Sec。 371日期：1985年11月25日 102（e）1985年11月25日日期PCT提交1985年4月1日PCT公布。第WO85 / 04473号公报日期：1985年10月10日。光学压力感测装置包括光纤干涉仪，其布置成感测压力响应元件的运动并在其输出处产生干涉信号，其可以被监视和处理，以测量施加到压力的压力的变化响应元素干涉仪包括耦合到压力响应元件的信号臂和固定的参考臂。光源通过光纤向干涉仪的输入提供光，并且连接到输出的监视和处理电子器件确定在信号和参考臂中传播的光束之间的光学相移并产生压力读数。

90. 发明授权

US4642458A Polarimetric fibre sensor 失效
标题翻译：偏光纤传感器
公开(公告)号：US4642458A
公开(公告)日：1987-02-10
申请号：US774589
申请日：1985-09-05
申请人： David A. Jackson , Michael Corke , Alan D. Kersey
发明人： David A. Jackson , Michael Corke , Alan D. Kersey
IPC分类号： G01D5/34 , G01K11/32 , G02F1/01
CPC分类号： G01D5/344 , G01K11/32
摘要： A polarmetric fiber sensor comprises a lead fiber (1) and a shorter length of sensing fiber (2). Both fibers comprise higly birefringent optical fiber having orthogonal eigen modes and are spliced together with their eigen modes mutually rotated by 45.degree.. The sensing fiber (2) has a reflective distal end (6). Linearly polarized light from a laser source (3) is launched into one mode of the lead fiber (1) and light reflected from the distal end of the sensing fiber is recovered from the other mode of the lead fiber via a beam splitter (7) and photodiode (8). The resulting electrical signal produced by the photodiode (8) corresponds to the modal birefringence of the sensing fiber (2) and changes in this birefringence are monitored by processing means (9) to detect changes in a physical parameter sensed by the sensing fiber.
摘要翻译： PCT No.PCT / GB85 / 00017 Sec。 371日期：1985年9月5日 102（e）1985年9月5日PCT 1985年1月18日PCT PCT。出版物WO85 / 03124 日期：1985年7月18日。一种光纤传感器包括引线光纤（1）和较短长度的传感光纤（2）。两根纤维均包含具有正交本征模的高双折射光纤，并将其本征模式相互旋转45度而拼接在一起。感测光纤（2）具有反射的远端（6）。来自激光源（3）的线偏振光发射到引导光纤（1）的一种模式中，并且从感测光纤的远端反射的光通过分束器（7）从引线光纤的另一种模式恢复，和光电二极管（8）。由光电二极管（8）产生的电信号对应于感测光纤（2）的模式双折射，并且通过处理装置（9）监视该双折射的变化，以检测由感测光纤感测到的物理参数的变化。

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