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11. 发明授权

US06606181B2 Optical power limiting control 失效
公开(公告)号：US06606181B2
公开(公告)日：2003-08-12
申请号：US09994419
申请日：2001-11-27
申请人： Jayantilal S. Patel , Zhizhong Zhuang
发明人： Jayantilal S. Patel , Zhizhong Zhuang
IPC分类号： G02F101
CPC分类号： G02F1/21 , G02B6/266 , G02F2203/48
摘要： A controllable phase plate has numerous domains that are randomized as to the orientation of their birefringence and can be used in a power limiting control to produces an electrically controllable diffraction pattern having a portion, especially the zero mode axial spot of the pattern, that is directed onto an output aperture such as a pinhole or an optical fiber end. Controlling the phase plate produces an interference peak or null (or an intermediate level) of light, coupled into the output aperture. The phase plate preferably comprises a liquid crystal with controllable birefringence. The domains have paired orthogonal orientations, which is a condition that is met in randomized domains. The paired orthogonal orientations make the device polarization insensitive. In a controllable attenuating device, collimating lenses are placed before and after the phase plate along a beam path to focus a clear interference pattern on a screen containing the output aperture. Several variations are disclosed including an electrically controllable phase plate arrangement using liquid crystal controllably birefringent material prepared in a polarization insensitive manner in zones, or preferably by providing random director orientation in a plane.

12. 发明申请

US20120176606A1 METHOD AND APPARATUS FOR DISTURBANCE DETECTION 失效
标题翻译：用于干扰检测的方法和装置
公开(公告)号：US20120176606A1
公开(公告)日：2012-07-12
申请号：US13016814
申请日：2011-01-28
申请人： Yuri Zadorozhny , Francesco Anthony Annetta , Zhizhong Zhuang , Jay S. Patel
发明人： Yuri Zadorozhny , Francesco Anthony Annetta , Zhizhong Zhuang , Jay S. Patel
IPC分类号： G01N21/88
CPC分类号： G01M11/33 , G01D5/35361 , G01K11/32 , G01M5/0025 , G01M5/0033 , G01M5/0066 , G01M5/0091 , G01N2201/0886
摘要： A sweep sensor may include a signal source, a propagation medium, and a detector. By transmitting an interrogating signal from the signal source into the propagation medium, detectable disturbances along the medium can physically alter the characteristics of the medium, which may cause a measurable change in the backscattered signal at the detector. Based on the change, it may be possible to locate the geographic origins of the physical disturbances along the propagation medium, or to determine the nature of the disturbances, or both. For example, it is generally possible to estimate the approximate distance between the detector and the disturbance given the time required to obtain the backscattered signal and the velocity of the signal source in the propagation medium. Further, in some embodiments, it is possible to quantify the amount of disturbance.
摘要翻译：扫描传感器可以包括信号源，传播介质和检测器。通过从信号源传输询问信号到传播介质中，沿着介质的可检测的扰动可以物理地改变介质的特性，这可能导致检测器处的反向散射信号的可测量的变化。基于这种变化，可以沿着传播介质定位物理扰动的地理起源，或者确定干扰的性质，或者两者。例如，通常可以估计在获得反向散射信号所需的时间和传播介质中的信号源的速度之间的检测器和干扰之间的近似距离。此外，在一些实施例中，可以量化扰动的量。

13. 发明申请

US20070253662A1 Phase Responsive Optical Fiber Sensor 审中-公开
标题翻译：相位光纤传感器
公开(公告)号：US20070253662A1
公开(公告)日：2007-11-01
申请号：US11570481
申请日：2005-04-01
申请人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny
发明人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny
IPC分类号： G02B6/10
CPC分类号： G01M11/39 , G02B6/2766 , G08B13/184 , G08B13/186 , G08B13/2491 , H04B10/0771
摘要： The location of a physical disturbance along an optical waveguide is determined by measuring different propagation times for the resulting phase variation to propagate to phase responsive receivers at ends of bidirectional signal paths. Each receiver can have a coupler that functions as a beam combiner and as a beam splitter inserting the opposite signal. On each receiving end, the coupler provides one or more detectors with signals from which phase related independent variable values are taken, processed and mapped to phase angles. Relative phase angle versus time is derived for each opposite signal pair and correlated at a time difference, i.e., a difference in propagation time from which the location of the disturbance is resolved. Polarization sensitive and polarization insensitive examples are discussed with various optical fiber arrangements.
摘要翻译：沿着光波导的物理扰动的位置通过测量所得到的相位变化的不同传播时间来确定，以在双向信号路径的端部传播到相位响应接收机。每个接收机可以具有用作波束组合器的耦合器和用于插入相反信号的分束器。在每个接收端，耦合器向一个或多个检测器提供信号，从相位相关的独立变量值被采取，处理并映射到相位角。对于每个相对的信号对导出相对相位角对时间，并且在时间差处相关，即，扰乱位置从该差异被解析的传播时间差。与各种光纤布置讨论偏振敏感和极化不敏感的示例。

14. 发明申请

US20050276611A1 Distributed fiber sensor with detection and signal processing using polarization state management 失效
标题翻译：分布式光纤传感器，具有使用偏振状态管理的检测和信号处理
公开(公告)号：US20050276611A1
公开(公告)日：2005-12-15
申请号：US10911326
申请日：2004-08-04
申请人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny
发明人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny
IPC分类号： H04B10/00 , H04B10/02 , H04B10/08
CPC分类号： G01M11/39 , H04B10/00
摘要： Polarization effects are managed to provide differential timing information for localizing disturbances affecting two or more counter-propagating light signals on one or more optical waveguides passing through a detection zone. Activity can be localized to a point for a security perimeter. Events causing optical disturbance can be mapped to points along a straight line, a perimeter or arbitrary pattern or an array. Events cause local changes in optical properties in the optical waveguide, in particular an optical fiber. Short term local changes are distinguishable from phase changes of light travel in the waveguide, by managing the polarization state of input and output beams, combining orthogonal polarization components and other aspects. The changes in the states of polarization of the counter-propagating light signals are determined and the temporal spacing of corresponding changes in polarization state are resolved to pinpoint the location of the event along the optical fiber.
摘要翻译：管理极化效应以提供差分定时信息，用于定位影响通过检测区域的一个或多个光波导上的两个或多个反向传播光信号的干扰。活动可以本地化到安全边界的一个点。导致光学干扰的事件可以映射到沿直线，周边或任意图案或阵列的点。事件导致光波导中光学特性的局部变化，特别是光纤。通过管理输入和输出光束的偏振状态，组合正交偏振分量和其他方面，短期局部变化可以与波导中光行进的相位变化区别开来。确定反向传播光信号的极化状态的变化，并且解决极化状态中相应变化的时间间隔，以确定事件沿光纤的位置。

15. 发明申请

US20050147341A1 Distributed fiber sensor with interference detection and polarization state management 有权
标题翻译：分布式光纤传感器，具有干扰检测和极化状态管理
公开(公告)号：US20050147341A1
公开(公告)日：2005-07-07
申请号：US10919547
申请日：2004-08-16
申请人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny
发明人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny
IPC分类号： G01L1/24 , G08B13/12 , G08B13/186 , G02B6/00
CPC分类号： G08B13/124 , G01L1/242 , G01M11/39 , G08B13/186
摘要： Polarization effects are managed to provide differential timing information for localizing disturbances affecting two or more counter-propagating light signals on one or more optical waveguides passing through a detection zone. Activity can be localized to a point for a security perimeter. Events causing optical disturbance can be mapped to points along a straight line, a perimeter or arbitrary pattern or an array. Events cause local changes in optical properties in the optical waveguide, in particular an optical fiber. Short term local changes are distinguishable from phase changes of light travel in the waveguide by managing the polarization state of input and output beams.
摘要翻译：管理极化效应以提供差分定时信息，用于定位影响通过检测区域的一个或多个光波导上的两个或多个反向传播光信号的干扰。活动可以本地化到安全边界的一个点。导致光学干扰的事件可以映射到沿直线，周边或任意图案或阵列的点。事件导致光波导中光学特性的局部变化，特别是光纤。通过管理输入和输出光束的偏振状态，短波局部变化与波导中的光行进的相位变化是不同的。

16. 发明授权

US08705020B2 Method and apparatus for disturbance detection 失效
标题翻译：干扰检测方法和装置
公开(公告)号：US08705020B2
公开(公告)日：2014-04-22
申请号：US13016814
申请日：2011-01-28
申请人： Zhizhong Zhuang , Yuri Zadorozhny , Francesco Anthony Annetta , Jay S. Patel
发明人： Zhizhong Zhuang , Yuri Zadorozhny , Francesco Anthony Annetta , Jay S. Patel
IPC分类号： G01N21/00
CPC分类号： G01M11/33 , G01D5/35361 , G01K11/32 , G01M5/0025 , G01M5/0033 , G01M5/0066 , G01M5/0091 , G01N2201/0886
摘要： A sweep sensor may include a signal source, a propagation medium, and a detector. By transmitting an interrogating signal from the signal source into the propagation medium, detectable disturbances along the medium can physically alter the characteristics of the medium, which may cause a measurable change in the backscattered signal at the detector. Based on the change, it may be possible to locate the geographic origins of the physical disturbances along the propagation medium, or to determine the nature of the disturbances, or both. For example, it is generally possible to estimate the approximate distance between the detector and the disturbance given the time required to obtain the backscattered signal and the velocity of the signal source in the propagation medium. Further, in some embodiments, it is possible to quantify the amount of disturbance.
摘要翻译：扫描传感器可以包括信号源，传播介质和检测器。通过从信号源传输询问信号到传播介质中，沿着介质的可检测的扰动可以物理地改变介质的特性，这可能导致检测器处的反向散射信号的可测量的变化。基于这种变化，可以沿着传播介质定位物理扰动的地理起源，或者确定干扰的性质，或者两者。例如，通常可以估计在获得反向散射信号所需的时间和传播介质中的信号源的速度之间的检测器和干扰之间的近似距离。此外，在一些实施例中，可以量化扰动的量。

17. 发明申请

US20060239603A1 Distributed sensor system coupled with a plurality of secondary sensors 审中-公开
标题翻译：与多个二次传感器耦合的分布式传感器系统
公开(公告)号：US20060239603A1
公开(公告)日：2006-10-26
申请号：US11151334
申请日：2005-06-13
申请人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny , Young Kim
发明人： Jayantilal Patel , Zhizhong Zhuang , Yuri Zadorozhny , Young Kim
IPC分类号： G02B6/00
CPC分类号： G08B13/186 , G08B13/126 , G08B13/2491
摘要： An intrusion detection system with a distributed sensor system coupled with a plurality of secondary sensors is disclosed. The distributed sensor is deployed over a protected zone, and detects physical disturbances caused by intrusion into the zone. A plurality of physical disturbing devices is coupled to the distributed sensor to physically disturb the distributed sensor. A plurality of secondary sensors is employed as additional sensors to volumetrically extend the sensing zone, and is coupled with physically disturbing devices. A secondary sensor sends a signal to an associated physically disturbing device upon detecting an event to be monitored, and the signal operates the physically disturbing device to produce a physical disturbance that will be detected by the distributed sensor. Location of the event is identified by analyzing the disturbance and consequently by locating the physically disturbing device and the associated secondary sensor.
摘要翻译：公开了一种具有与多个二次传感器耦合的分布式传感器系统的入侵检测系统。分布式传感器部署在受保护区域上，并且可以检测到入侵区域造成的物理扰动。多个物理干扰装置耦合到分布式传感器以物理地干扰分布式传感器。使用多个二次传感器作为附加的传感器来体积地延伸感测区域，并且与物理上干扰的设备耦合。次级传感器在检测到要监视的事件时将信号发送到相关联的物理干扰设备，并且该信号操作物理干扰设备以产生将由分布式传感器检测到的物理扰动。通过分析干扰并因此通过定位物理干扰装置和相关的次级传感器来识别事件的位置。

18. 发明授权

US06535335B2 Optical polarization encoder 失效
标题翻译：光偏振编码器
公开(公告)号：US06535335B2
公开(公告)日：2003-03-18
申请号：US09974826
申请日：2001-10-12
申请人： Jay S Patel , Zhizhong Zhuang
发明人： Jay S Patel , Zhizhong Zhuang
IPC分类号： G02B530
CPC分类号： H04J14/02 , H04B10/532
摘要： An optical polarization encoding device has been invented which allows wavelength dependent processing of polychromatic optical signals without prior separation into narrow wavelength bands. The invention comprises a stack of variable and fixed birefringent elements which introduces, on passage through the stack, a wavelength dependent polarization onto a polychromatic optical signal of arbitrary polarization. Desired polarizations are achieved simultaneously at all wavelengths contained within the incoming signal by independently varying the birefringence and/or crystallographic orientation of each element within the stack. The encoded signal may be subsequently be processed, e.g. rerouted or attenuated, as a function of wavelength using polarization dependent devices. The encoding stack is rendered polarization insensitive by dividing the incoming optical signal, with a polarization beam splitter, into two beams of orthogonal polarization prior to passage through the stack.
摘要翻译：已经发明了一种光偏振编码装置，其允许多色光信号的波长相关处理，而无需事先分离成窄波段。本发明包括一组可变和固定的双折射元件，其在通过堆叠时将与波长相关的偏振引入到任意偏振的多色光信号上。通过独立地改变堆叠内的每个元件的双折射和/或晶体取向，在输入信号中包含的所有波长下同时实现期望的偏振。编码信号可以随后被处理，例如，使用偏振相关器件作为波长的函数被重新路由或衰减。通过将入射光信号与偏振分束器分离成通过堆叠之前的两束正交偏振，使得编码堆叠变得不偏振。

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