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1. 发明公开

US20240183692A1 Quantum Sensing and Computing Using Cascaded Phases 审中-公开
公开(公告)号：US20240183692A1
公开(公告)日：2024-06-06
申请号：US18491561
申请日：2023-10-20
申请人： The Regents of the University of Colorado, a body corporate
发明人： Juliet Gopinath , Lior Cohen , Gregory Krueper , Joshua Combes
IPC分类号： G01D5/353 , G06N10/40
CPC分类号： G01D5/35329 , G01D5/35303 , G01D5/35335 , G06N10/40
摘要： A system for sensing phase changes in a medium includes a bidirectional interferometer having a reference arm and a sensing arm, two inputs at each of the two ends of the interferometer, and a circulator disposed between each input and the interferometer. Sources provide squeezed state pulses at an input at each end of the interferometer. Spaced-apart partial reflectors are disposed along the arms. There are detectors associated with each input. The circulators pass the squeezed state pulses into the interferometer and route reflections of the pulses to the detectors. Classical pulses may provided at the other input at each end of the interferometer.

2. 发明授权

US11852512B2 Optical sensors interrogation device and method 有权
公开(公告)号：US11852512B2
公开(公告)日：2023-12-26
申请号：US17683522
申请日：2022-03-01
申请人： ADVA Optical Networking SE
发明人： Michael Eiselt
IPC分类号： G01D5/353 , G01K11/32
CPC分类号： G01D5/35329 , G01K11/32
摘要： In a method for interrogating at least one optical sensor coupled to an optical path, at least two time-shifted optical signals are fed into the optical path and reflected optical signals of the at least two probe signals created by the at least one optical sensor are detected. Each detected reflected optical signal is assigned to one of the at least one optical sensor and a correct optical frequency is assigned to each detected reflected optical signal. An absolute value or a value range or a change of a value or value range of the parameter to be sensed is determined from the one or more of the following physical conditions: the optical reflection signals, the reflectivity of the at least one optical sensor, and the frequency of each detected optical reflection signal, or from one or more dependencies that link these physical conditions.

3. 发明授权

US10054420B2 Method and apparatus for motion compensation in interferometric sensing systems using a non-linear compensating signal 有权
公开(公告)号：US10054420B2
公开(公告)日：2018-08-21
申请号：US15793177
申请日：2017-10-25
申请人： INTUITIVE SURGICAL OPERATIONS, INC.
发明人： Mark E. Froggatt , Alexander K. Sang , Dawn K. Gifford , Justin W. Klein
IPC分类号： G01B9/02 , G01B11/06 , G01D5/353 , G01L1/24
CPC分类号： G01B9/0207 , G01B9/02004 , G01B9/02069 , G01B9/02072 , G01B9/02076 , G01B9/02083 , G01B9/0209 , G01B11/0658 , G01B11/18 , G01D5/35329 , G01D5/35358 , G01D5/3537 , G01L1/242 , G01M11/3172
摘要： An optical interrogation system, e.g., an OFDR-based system, measures local changes of index of refraction of a sensing light guide subjected to a time-varying disturbance. Interferometric measurement signals detected for a length of the sensing light guide are transformed into the spectral domain. A time varying signal is determined from the transformed interferometric measurement data set. A compensating signal is determined from the time varying signal which is used to compensate the interferometric measurement data set for the time-varying disturbance. The compensation technique may be applied along the length of the light guide.

4. 发明授权

US09435668B2 Fibre optic distributed sensing 有权
标题翻译：光纤分布式传感
公开(公告)号：US09435668B2
公开(公告)日：2016-09-06
申请号：US13441798
申请日：2012-04-06
申请人： Andrew Biggerstaff Lewis , Stuart John Russell
发明人： Andrew Biggerstaff Lewis , Stuart John Russell
IPC分类号： G01D5/353 , G01D1/00 , G01D1/02
CPC分类号： G01H9/004 , G01D1/00 , G01D1/02 , G01D5/35303 , G01D5/35306 , G01D5/35312 , G01D5/35329 , G01D5/35345 , G01D5/35358 , G01D5/35361 , G01D5/35367 , G01D5/35387 , G01D5/3539 , G01D5/35393 , G01D5/35396
摘要： The application describes methods and apparatus for distributed fiber sensing, especially distributed acoustic/strain sensing. The method involves launching interrogating radiation in to an optical fiber and sampling radiation backscattered from within said fiber at a rate so as to acquire a plurality of samples corresponding to each sensing portion of interest. The plurality of samples are divided into separate processing channels and processed to determine a phase value for that channel. A quality metric is then applied to the processed phase data and the data combined to provide an overall phase value for the sensing portion based on the quality metric. The quality metric may be a measure of the degree of similarity of the processed data from the channels. The interrogating radiation may comprise two relatively narrow pulses separated by a relatively wide gap and the sampling rate may be set such that a plurality of substantially independent diversity samples are acquired.
摘要翻译：该应用描述了用于分布式光纤感测的方法和装置，特别是分布式声/应变感测。该方法包括将询问辐射发射到光纤中，并以一定速率从所述光纤内部向后散射的采样辐射采样，以便获得对应于感兴趣的感测部分的多个样本。多个样本被分成单独的处理通道并被处理以确定该通道的相位值。然后将质量度量应用于经处理的相位数据，并且组合的数据基于质量度量为感测部分提供总体相位值。质量度量可以是来自信道的经处理数据的相似度的度量。询问辐射可以包括由相对宽的间隙分开的两个相对窄的脉冲，并且可以设置采样率使得获得多个基本上独立的分集样本。

5. 发明授权

US08548282B2 Fiber in-line Mach-Zehnder interferometer (MZI) device 有权
标题翻译：光纤在线马赫策德干涉仪（MZI）装置
公开(公告)号：US08548282B2
公开(公告)日：2013-10-01
申请号：US13170647
申请日：2011-06-28
申请人： Dongning Wang , Minwei Yang
发明人： Dongning Wang , Minwei Yang
IPC分类号： G02B6/00
CPC分类号： G01N21/45 , G01D5/35303 , G01D5/35329 , G01K11/32 , G01N21/0303 , G01N2021/458
摘要： A fiber-inline MZI device for temperature sensing or refractive index (RI) sensing, the device comprising: a section of a Photonic Crystal Fiber (PCF) having at least two air holes infiltrated with a liquid analyte to form a waveguide channel, the liquid analyte forming rods in the PCF; wherein the rods leave an interference fringe pattern in the transmission spectrum when light is injected into the PCF, and fringe dips are tracked over a wide wavelength range in order to sense the temperature or refractive index.
摘要翻译：一种用于温度感测或折射率（RI）感测的光纤在线MZI装置，所述装置包括：具有渗透有液体分析物以形成波导通道的至少两个空气孔的光子晶体光纤（PCF）的部分，所述液体 PCF中的分析物形成棒; 其中当光注射到PCF中时，杆在透射光谱中留下干涉条纹图案，并且在宽波长范围上跟踪条纹倾斜以便感测温度或折射率。

6. 发明申请

US20130208283A1 VARIABLE SENSITIVITY INTERFEROMETER SYSTEMS 审中-公开
标题翻译：可变灵敏度干扰仪系统
公开(公告)号：US20130208283A1
公开(公告)日：2013-08-15
申请号：US13879370
申请日：2011-09-21
申请人： Edward Tapanes
发明人： Edward Tapanes
IPC分类号： G01B9/02 , G02B6/255 , G02B6/36
CPC分类号： G01B9/02041 , G01B9/02 , G01B9/02012 , G01B9/02027 , G01B9/02049 , G01B9/02079 , G01B2290/70 , G01D5/35306 , G01D5/35325 , G01D5/35329 , G01N21/8806 , G01N2201/0612 , G01N2201/088 , G02B6/255 , G02B6/36 , G08B13/124 , G08B13/186 , Y10T29/49826
摘要： Variable Sensitivity optical sensors can have a respective actual sensitivity of one or more portions of the sensor corresponding, at least in part, to a selected environment of each respective sensor portion. Some disclosed sensors have a plurality of optical conduits extending longitudinally of the sensors. At least one of the optical conduits can have at least one longitudinally extending segment having one or more optical and/or mechanical properties that differs from the optical properties of an adjacent longitudinally extending segment, providing the conduit with longitudinally varying signal propagation characteristics. An optical sensor having such optical conduits can exhibit a longitudinally varying actual sensitivity. Nonetheless, such a sensor can exhibit a substantially constant apparent sensitivity, e.g., when each respective portion of the sensor exhibits an actual sensitivity corresponding to a selected environment. Innovative sensors can provide a low-incidence of false or nuisance alarms, accurate position and magnitude information, and other advantages.
摘要翻译：可变灵敏度光学传感器可以具有至少部分地对应于每个相应传感器部分的选定环境的传感器的一个或多个部分的相应实际灵敏度。一些公开的传感器具有沿传感器纵向延伸的多个光导管。光导管中的至少一个可以具有至少一个具有一个或多个光学和/或机械特性的纵向延伸段，其不同于相邻的纵向延伸段的光学性质，为导管提供纵向变化的信号传播特性。具有这种光导管的光学传感器可以呈现纵向变化的实际灵敏度。尽管如此，这种传感器可以表现出基本上恒定的视觉灵敏度，例如当传感器的每个相应部分表现出对应于选定环境的实际灵敏度时。创新的传感器可以提供低发生率的错误或烦扰报警，准确的位置和幅度信息等优点。

7. 发明申请

US20120280117A1 Fibre Optic Distributed Sensing 有权
标题翻译：光纤分布式传感器
公开(公告)号：US20120280117A1
公开(公告)日：2012-11-08
申请号：US13441802
申请日：2012-04-06
申请人： Andrew Biggerstaff Lewis , Stuart John Russell
发明人： Andrew Biggerstaff Lewis , Stuart John Russell
IPC分类号： G01J1/42 , G01J4/00 , G02B6/10
CPC分类号： G01H9/004 , G01D1/00 , G01D1/02 , G01D5/35303 , G01D5/35306 , G01D5/35312 , G01D5/35329 , G01D5/35345 , G01D5/35358 , G01D5/35361 , G01D5/35367 , G01D5/35387 , G01D5/3539 , G01D5/35393 , G01D5/35396
摘要： The application describes methods and apparatus for distributed fibre sensing, especially distributed acoustic/strain sensing. The method involves launching at least first and second pulse pairs into an optical fibre, the first and second pulse pairs having the same frequency configuration as one another and being generated such that the phase relationship of the pulses of the first pulse pair has a predetermined relative phase difference to the phase relationship of the pulses of the second pulse pair. In one embodiment there is a frequency difference between the pulses in a pulse pair which is related to the launch rate of the pulse pairs. In another embodiment the phase difference between the pulses in a pair is varied between successive launches. In this way an analytic version of the backscatter interference signal can be generated within the baseband of the sensor.
摘要翻译：该应用描述了用于分布式光纤感测的方法和装置，特别是分布式声/应变感测。该方法包括至少将第一和第二脉冲对发射到光纤中，第一和第二脉冲对具有彼此相同的频率配置并被产生，使得第一脉冲对的脉冲的相位关系具有预定的相对相位差与第二脉冲对的脉冲的相位关系。在一个实施例中，与脉冲对的发射速率相关的脉冲对中的脉冲之间存在频率差。在另一个实施例中，一对脉冲之间的相位差在连续发射之间是变化的。以这种方式，可以在传感器的基带内产生背散射干扰信号的分析版本。

8. 发明申请

US20080191126A1 APPARATUS AND METHOD FOR USING A COUNTER-PROPAGATING SIGNAL METHOD FOR LOCATING EVENTS 有权
标题翻译：用于定位事件的计数器信号方法的装置和方法
公开(公告)号：US20080191126A1
公开(公告)日：2008-08-14
申请号：US11674438
申请日：2007-02-13
申请人： Alexander Raoul Adams , Jim Katsifolis
发明人： Alexander Raoul Adams , Jim Katsifolis
IPC分类号： G01J9/02 , G01B9/02
CPC分类号： G01D5/35329 , G01B9/02023 , G01B2290/45 , G01B2290/70 , G01M11/39
摘要： An apparatus and method for using a counter-propagating signal method for locating events is disclosed. The apparatus and method uses a Mach Zehnder interferometer through which counter-propagating signals can be launched. If the sensing zone of the Mach Zehnder interferometer is disturbed, modified counter-propagating signals are produced and the time difference between receipt of those signals is used to determine the location of the event. A Microcontroller receives feedback signals which adjusts polarisation controllers (43, 44) so that the polarisation states of the counter-propagating signals can be controlled to match the amplitude and/or phase of the output signals. Detectors are provided for detecting the modified signals.
摘要翻译：公开了一种使用反向传播信号方法定位事件的装置和方法。该装置和方法使用可以发射反向传播信号的马赫曾德尔干涉仪。如果马赫策德干涉仪的感测区域被干扰，则产生修改的反向传播信号，并且使用这些信号的接收之间的时间差来确定事件的位置。微控制器接收调整偏振控制器（43,44）的反馈信号，使得可以控制反向传播信号的极化状态以匹配输出信号的幅度和/或相位。检测器用于检测修改的信号。

9. 发明授权

US5363191A Fibre optic sensor array reading device 失效
标题翻译：光纤传感器阵列读取装置
公开(公告)号：US5363191A
公开(公告)日：1994-11-08
申请号：US47621
申请日：1993-04-16
申请人： Philippe Refregier , Marc Turpin
发明人： Philippe Refregier , Marc Turpin
IPC分类号： G01D5/353 , G01B9/02
CPC分类号： G01D5/3539 , G01D5/35329 , G01D5/35335
摘要： A device for reading sensors in fiber optics which includes an integrated optics interferometer wherein the interference signal is slaved to a set-point value by means of a negative feedback signal. The measurement for reading the sensors is provided from the negative-feedback generated signal. In one of the disclosed embodiments generated delays of a value greater than an optical wavelength are measured by coupling the interferometer to a counting-up/counting-down system for interference fringe jumps.
摘要翻译： PCT No.PCT / FR90 / 00867 Sec。 371日期：1991年7月23日 102（e）日期1991年7月23日PCT 1990年11月30日PCT。一种用于读取光纤中的传感器的装置，其包括集成光学干涉仪，其中通过负反馈将干扰信号从属于设定点值信号。用于读取传感器的测量由负反馈产生的信号提供。在所公开的实施例之一中，通过将干涉仪耦合到用于干涉条纹跳跃的计数/递减计数系统来测量产生大于光学波长的值的延迟。

10. 发明授权

US11933646B2 Interferometric demodulation system and method for large capacity fiber grating sensing network 有权
公开(公告)号：US11933646B2
公开(公告)日：2024-03-19
申请号：US17488304
申请日：2021-09-29
申请人： Wuhan University of Technology
发明人： Zhengying Li , Jiaqi Wang , Honghai Wang
IPC分类号： G01D5/353 , H04B10/548
CPC分类号： G01D5/35329 , G01D5/35303 , H04B10/548
摘要： An interferometric demodulation system for a large capacity fiber grating sensing network is provided by the present disclosure, comprising: a continuous light output end of the nanoscale wide-spectrum light source is connected to an input end of the pulse optical modulator, an output end of the reference grating is connected to an input end of the grating array sensing network, and a third communication end of the optical circulator is connected to an input end of the optical amplifier, an output end of the optical amplifier is connected to an input end of the Mach-Zehnder interferometer, three-channel signal output ends of the Mach-Zehnder interferometer are respectively connected to signal input ends corresponding to the embedded signal processor through the photoelectric converter, and the embedded signal processor controls the heating device to control a temperature of an any one of interference arms of the Mach-Zehnder interferometer.

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