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1. 发明授权

US5396166A Fiber optic interferometric electric field and voltage sensor utilizing an electrostrictive transducer 失效
标题翻译：光纤干涉电场和采用电致伸缩传感器的电压传感器
公开(公告)号：US5396166A
公开(公告)日：1995-03-07
申请号：US936986
申请日：1992-08-27
申请人： Sandeep T. Vohra , Frank Bucholtz , Alan D. Kersey
发明人： Sandeep T. Vohra , Frank Bucholtz , Alan D. Kersey
IPC分类号： G01R15/24 , H01J40/14
CPC分类号： G01R15/241
摘要： A fiber optic interferometer sensor system utilizing a fiber optic interferometer with an elecrostrictive transducer bonded to one of first and second optical fiber arms of the interferometer for obtaining excellent low frequency voltage detectors and electric field sensors. The non-linear characteristics of the electrostrictive transducer allows for detecting low frequency or dc signals at sidebands of a high frequency carrier, resolving extremely small voltages at low frequencies, or sensing low frequency electric fields. Examples of electrostrictive material include Ba:PZT, PLZT, PMN+PT, and other doped ferroelectric relaxors.
摘要翻译：一种使用光纤干涉仪的光纤干涉仪传感器系统，其具有结合到干涉仪的第一和第二光纤臂之一的电子传感器，用于获得优异的低频电压检测器和电场传感器。电致伸缩传感器的非线性特性允许在高频载波的边带检测低频或直流信号，在低频下分辨极小的电压或感测低频电场。电致伸缩材料的实例包括Ba：PZT，PLZT，PMN + PT和其它掺杂的铁电弛豫剂。

2. 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。

3. 发明授权

US06580855B1 Bandwidth tunable gratings for dynamic dispersion compensation in lightwave 失效
标题翻译：用于光波动态色散补偿的带宽可调光栅
公开(公告)号：US06580855B1
公开(公告)日：2003-06-17
申请号：US09684816
申请日：2000-10-10
申请人： Sandeep T. Vohra , Chia Chen Chang , Bryan Althouse
发明人： Sandeep T. Vohra , Chia Chen Chang , Bryan Althouse
IPC分类号： G02B634
CPC分类号： G02F1/0134 , G02B6/022 , G02B6/2932 , G02B6/29322 , G02B6/29394 , G02F2201/307
摘要： A bandwidth tunable fiber Bragg grating (FBG) device performs tuning in an optical transmission circuit by placing a grating in a compliant material, which is transversely loaded to create longitudinal strain through the Poisson effect of materials. Careful application of various load magnitudes along the length of the grating through the compliant material creates a strain gradient along the length of the grating, which chirps the grating thus resulting in altering the bandwidth of the grating. Tuning the grating bandwidth results, effectively, in tuning the dispersion of light being reflected off the grating. Insertion of such a device in the optical link allows for dynamic dispersion compensation in the link. The ability of the device to ‘dial-in’ a desired amount of dispersion is what makes it valuable.
摘要翻译：带宽可调光纤布拉格光栅（FBG）器件通过将光栅放置在柔性材料中来进行光传输电路中的调谐，该柔性材料被横向加载以通过材料的泊松效应产生纵向应变。通过柔性材料沿着光栅的长度小心地施加各种载荷大小，沿着光栅的长度产生应变梯度，该光栅啁啾光栅，从而导致改变光栅的带宽。有效地调整光栅带宽的结果，调整从光栅反射的光的色散。在光链路中插入这样的设备允许链路中的动态色散补偿。设备“拨入”所需数量的色散的能力是使其有价值的。

4. 发明授权

US6056032A Apparatus for winding optic fiber coils 失效
标题翻译：用于缠绕光纤线圈的装置
公开(公告)号：US6056032A
公开(公告)日：2000-05-02
申请号：US138018
申请日：1998-08-21
申请人： Sandeep T. Vohra , Bruce Danver , Alan Tveten , Anthony Dandridge
发明人： Sandeep T. Vohra , Bruce Danver , Alan Tveten , Anthony Dandridge
IPC分类号： G01P15/093 , B31C3/16 , B65H81/00
CPC分类号： G01P15/093
摘要： The interferometric fiber optic accelerometer is viewed as a mass-spring nsducer housed in a sensor case. The sensor case is attached to a moving part whose motion is inferred from the relative motion between the mass and the sensor case. A flexural disk is housed in a sensor case which is accelerated in a direction normal to the plate surface. The plate undergoes displacement resulting in strains on the plate surface. A coil of optical fiber, made to be part of an optical interferometer, is attached to the flexural disk, the strain from the disk is transferred to the fiber thus changing the path length of the fiber interferometer. The interferometer output in demodulated providing the acceleration response. The design of the accelerometer housing is such that it is highly immune to extraneous signals, i.e., dynamic and hydrostatic pressure. Fabrication of the optical fiber coils is accomplished by winding the optical fiber, with a specially designed chuck to form reference and sensing fiber coils which are then bonded to the flexural disk to form the accelerometer.
摘要翻译：干涉光纤加速度计被视为容纳在传感器壳体中的质量弹簧传感器。传感器外壳安装在运动部分上，运动是通过质量传感器和传感器外壳之间的相对运动来推断的。弯曲盘被容纳在传感器壳体中，该传感器壳体沿垂直于板表面的方向被加速。板经受位移，导致板表面上的应变。将制成光干涉仪的一部分的光纤线圈连接到弯曲盘上，将来自盘的应变传递到光纤，从而改变光纤干涉仪的路径长度。干涉仪输出解调后提供加速响应。加速度计壳体的设计使得其对外部信号（即动态和静水压力）是高度免疫的。通过用专门设计的卡盘卷绕光纤来形成光纤线圈的制造，以形成参考和感测纤维线圈，然后将纤维线圈结合到弯曲盘以形成加速度计。

5. 发明授权

US06744035B2 Passive, temperature compensated techniques for tunable filter calibration in bragg-grating interrogation systems 失效
标题翻译：被动温度补偿技术，用于布拉格光栅询问系统中的可调谐滤波器校准
公开(公告)号：US06744035B2
公开(公告)日：2004-06-01
申请号：US10346069
申请日：2003-01-17
申请人： Gregg A. Johnson , Bryan L. Althouse , Greg Nau , Sandeep T. Vohra
发明人： Gregg A. Johnson , Bryan L. Althouse , Greg Nau , Sandeep T. Vohra
IPC分类号： G01B902
CPC分类号： G01K11/3206 , G02B6/0218 , G02B6/02204 , G02B6/29319 , G02B6/29395 , G02B6/29398 , H04B10/07
摘要： A passive, temperature compensated tunable filter calibration device in a Bragg-grating interrogation system. The invention comprises two systems: 1) a dual substrate Bragg grating calibration system, the temperature of an array of gratings is estimated using an array of gratings bonded to a common host substrate and a single grating bonded to a material with a different coefficient of thermal expansion; 2) a hydrogen cyanide wavelength reference absorption cell that absorbs light at discrete wavelengths corresponding to the molecular vibration mode frequencies of the gas. A first photodetector sees the transmission spectrum and a second sees the reflections from Bragg gratings in a sensing array. In this system there is no temperature compensation step as the absorption lines are not sensitive to temperature.
摘要翻译：布拉格光栅询问系统中的被动温度补偿可调滤波器校准装置。本发明包括两个系统：1）双基板布拉格光栅校准系统，使用结合到公共主机衬底的光栅阵列和结合到具有不同热系数的材料的单个光栅来估计光栅阵列的温度扩张; 2）吸收对应于气体的分子振动模式频率的离散波长的光的氰化氢波长参考吸收单元。第一光电检测器看到透射光谱，第二光电检测器看到来自感测阵列中的布拉格光栅的反射。在该系统中，由于吸收线对温度不敏感，因此没有温度补偿步骤。

6. 发明授权

US5404064A Low-frequency electrostrictive ceramic plate voltage sensor 失效
标题翻译：低频电致伸缩陶瓷板电压传感器
公开(公告)号：US5404064A
公开(公告)日：1995-04-04
申请号：US115063
申请日：1993-09-02
申请人： Marc D. Mermelstein , Sandeep T. Vohra
发明人： Marc D. Mermelstein , Sandeep T. Vohra
IPC分类号： H01L41/107 , H01L41/08
CPC分类号： H01L41/107
摘要： A stress-driven electrostrictive ceramic low-voltage plate voltage sensor based on the principle of the field-coupling between the strain and polarization in the ceramic material of the device. Application of a dithering or driving voltage to a piezoelectric tube thereby generating an oscillating polarization whose amplitude is proportional to an applied low-frequency voltage. A electrostrictive ceramic wafer material affixed to the piezoelectric tube senses this oscillation and generates a displacement current. The displacement current represents a voltage output that is an amplitude modulated carrier whose displaced amplitude is proportional to an applied unknown signal voltage sought to be determined.
摘要翻译：一种应力驱动的电致伸缩陶瓷低压板电压传感器，基于陶瓷材料中应变和极化之间的场耦合原理。将抖动或驱动电压施加到压电管，从而产生振幅与所施加的低频电压成比例的振荡极化。固定到压电管的电致伸缩陶瓷晶片材料感测到该振荡并产生位移电流。位移电流表示电压输出，该电压输出是幅度调制载波，其位移幅度与寻求确定的施加的未知信号电压成比例。

7. 发明授权

US09094149B1 Media stream distribution system 有权
标题翻译：媒体流分发系统
公开(公告)号：US09094149B1
公开(公告)日：2015-07-28
申请号：US13252678
申请日：2011-10-04
申请人： Irl N. Duling , Sandeep T. Vohra , Paul J. Matthews
发明人： Irl N. Duling , Sandeep T. Vohra , Paul J. Matthews
IPC分类号： H04J14/00 , H04J14/02
CPC分类号： H04J14/0227 , H04B10/272 , H04J14/0234 , H04J14/0246 , H04J14/025 , H04J14/0252 , H04J14/028 , H04J14/0282 , H04J14/0283 , H04J14/0286 , H04J14/0298 , H04N7/22
摘要： An arrangement is provided for transporting information from a central information distribution center (CIDC) to locations where such information is intended. Upon receiving a request for narrowcast information to be delivered to a node associated with a head end, the CIDC selects the requested information, generates an optical signal encoded with the requested information using information channels dedicated to narrowcast information transport for the node, and sends the optical signal to the head end via an optical fiber. When the head end receives the optical signal, the narrowcast information transport channels dedicated to the node are translated into subcarriers acceptable to the node before the requested narrowcast information is forwarded to the node.
摘要翻译：提供了一种用于将信息从中央信息分发中心（CIDC）传送到这样的信息的位置的布置。在接收到要传送到与头端相关联的节点的窄信息的请求时，CIDC选择所请求的信息，使用专用于节点的窄带信息传输的信息信道生成用所请求的信息编码的光信号，并发送光信号通过光纤到头端。当头端接收到光信号时，专用于该节点的窄幅信息传送通道被转换成节点可接受的子载波，然后所请求的窄带信息被转发到该节点。

8. 发明授权

US08032016B1 Agile block downconversion for the distribution of narrowcast services 有权
标题翻译：敏捷阻止下转换用于分配窄频业务
公开(公告)号：US08032016B1
公开(公告)日：2011-10-04
申请号：US10365619
申请日：2003-02-13
申请人： Irl N. Duling , Sandeep T. Vohra , Paul J. Matthews
发明人： Irl N. Duling , Sandeep T. Vohra , Paul J. Matthews
IPC分类号： H04J14/00
CPC分类号： H04J14/0227 , H04B10/272 , H04J14/0234 , H04J14/0246 , H04J14/025 , H04J14/0252 , H04J14/028 , H04J14/0282 , H04J14/0283 , H04J14/0286 , H04J14/0298 , H04N7/22
摘要： An arrangement is provided for transporting information from a central information distribution center (CIDC) to locations where such information is intended. Upon receiving a request for narrowcast information to be delivered to a node associated with a head end, the CIDC selects the requested information, generates an optical signal encoded with the requested information using information channels dedicated to narrowcast information transport for the node, and sends the optical signal to the head end via an optical fiber. When the head end receives the optical signal, the narrowcast information transport channels dedicated to the node are translated into subcarriers acceptable to the node before the requested narrowcast information is forwarded to the node.
摘要翻译：提供了一种用于将信息从中央信息分发中心（CIDC）传送到这样的信息的位置的布置。在接收到要传送到与头端相关联的节点的窄信息的请求时，CIDC选择所请求的信息，使用专用于节点的窄带信息传输的信息信道生成用所请求的信息编码的光信号，并发送光信号通过光纤到头端。当头端接收到光信号时，专用于该节点的窄幅信息传送通道被转换成节点可接受的子载波，然后所请求的窄带信息被转发到该节点。

9. 发明授权

US06944372B2 Tunable dispersion compensating bandwidth device for fiber optics system 有权
标题翻译：用于光纤系统的可调谐色散补偿带宽设备
公开(公告)号：US06944372B2
公开(公告)日：2005-09-13
申请号：US09957022
申请日：2001-09-21
申请人： Evelyn Boettcher , Sandeep T. Vohra , Gregg Johnson
发明人： Evelyn Boettcher , Sandeep T. Vohra , Gregg Johnson
IPC分类号： G02B6/02 , G02B6/34
CPC分类号： G02B6/022 , G02B6/29314 , G02B6/29394
摘要： A tunable dispersion compensating device for optical communications systems has a compliant support block having a longitudinal axis and a load-receiving surface oriented substantially parallel to the longitudinal axis. The load receiving surface is suitable to receive an applied load in a direction substantially orthogonal to the longitudinal axis. A Bragg-grating fiber is disposed in the compliant support block and extends substantially along, and at an angle to, the longitudinal axis of the compliant support block.
摘要翻译：用于光学通信系统的可调谐色散补偿装置具有柔性支撑块，该支撑块具有基本上平行于纵向轴线定向的纵向轴线和负载接收表面。载荷接收表面适于在基本上垂直于纵向轴线的方向上接收施加的载荷。布拉格光栅纤维设置在柔性支撑块中，并且基本沿着柔性支撑块的纵向轴线并且以一定角度延伸。

10. 发明授权

US06328837B1 Fiber optic accelerometer sensor and a method of constructing same 有权
标题翻译：光纤加速度传感器及其构造方法
公开(公告)号：US06328837B1
公开(公告)日：2001-12-11
申请号：US09453024
申请日：1999-12-02
申请人： Sandeep T. Vohra , Bruce Danver , Alan Tveten , Anthony Dandridge
发明人： Sandeep T. Vohra , Bruce Danver , Alan Tveten , Anthony Dandridge
IPC分类号： B65H8100
CPC分类号： G01P15/093
摘要： The interferometric fiber optic accelerometer is viewed as a mass-spring transducer housed in a sensor case. The sensor case is attached to a moving part whose motion is inferred from the relative motion between the mass and the sensor case. A flexural disk is housed in a sensor case which is accelerated in a direction normal to the plate surface. The plate undergoes displacement resulting in strains on the plate surface. A coil of optical fiber, made to be part of an optical interferometer, is attached to the flexural disk, the strain from the disk is transferred to the fiber thus changing the path length of the fiber interferometer. The interferometer output in demodulated providing the acceleration response. The design of the accelerometer housing is such that it is highly immune to extraneous signals, i.e., dynamic and hydrostatic pressure. Fabrication of the optical fiber coils is accomplished by winding the optical fiber, with a specially designed chuck to form reference and sensing fiber coils which are then bonded to the flexural disk to form the accelerometer.
摘要翻译：干涉光纤加速度计被视为容纳在传感器壳体中的质量弹簧传感器。传感器外壳安装在运动部分上，运动是通过质量传感器和传感器外壳之间的相对运动来推断的。弯曲盘被容纳在传感器壳体中，该传感器壳体沿垂直于板表面的方向被加速。板经受位移，导致板表面上的应变。将制成光干涉仪的一部分的光纤线圈连接到弯曲盘上，将来自盘的应变传递到光纤，从而改变光纤干涉仪的路径长度。干涉仪输出解调后提供加速响应。加速度计壳体的设计使得其对外部信号（即动态和静水压力）是高度免疫的。通过用专门设计的卡盘卷绕光纤来形成光纤线圈的制造，以形成参考和感测纤维线圈，然后将纤维线圈结合到弯曲盘以形成加速度计。

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