公开(公告)号：US5381230A

公开(公告)日：1995-01-10

申请号：US17685

申请日：1993-02-12

Applicant: James N. Blake ,  Clarence E. Laskoskie ,  Bogdan Szafraniec

Inventor： James N. Blake ,  Clarence E. Laskoskie ,  Bogdan Szafraniec

IPC: G01C19/72 ,  G01J9/02 ,  G02B6/00 ,  G02B6/12 ,  G02B6/126 ,  G02B6/28 ,  G02B6/34 ,  G01B9/02

CPC classification number: G02B6/2843 ,  G01C19/721 ,  G02B6/126 ,  G02B2006/1218 ,  H01S5/0687

Abstract: A spectrum stabilizer for stabilizing the wavelength of light emitted by a source for use in an optical system where the source can have that wavelength altered by varying one or more source parameters, such as source current, temperature and/or alignment of the output end of the source with an optical fiber of the optical system, and wherein light from a selected point in the optical system is coupled to a double mode waveguide for wavelength sensing.

Abstract translation: 用于稳定由光源发射的光的波长的光谱稳定器，用于光源系统中的源可以通过改变一个或多个源参数而改变波长，例如源电流，温度和/或对准输出端 所述光源具有所述光学系统的光纤，并且其中来自所述光学系统中的选定点的光耦合到用于波长感测的双模式波导。

公开(公告)号：US06175410B1

公开(公告)日：2001-01-16

申请号：US09215581

申请日：1998-12-17

Applicant: Bogdan Szafraniec ,  James N. Blake ,  Charles H. Lange ,  Lee K. Strandjord

Inventor： Bogdan Szafraniec ,  James N. Blake ,  Charles H. Lange ,  Lee K. Strandjord

IPC: G01C1972

CPC classification number: G01C19/721

Abstract: A fiber optic gyroscope having polarization error-correcting modulation. Polarization errors originate from the interference of primary waves and secondary cross-coupled waves. Although these error signals are very difficult to remove modulation signals may be applied to the integrated optics chip that minimize the total error over a period of time. By providing distinct but inter-related modulation signals to opposing inputs of the sensing coil, the various polarization errors can be averaged to zero over the period of the modulation signals.

Abstract translation: 具有偏振误差校正调制的光纤陀螺仪。 极化误差源于主波和二次交叉耦合波的干扰。 尽管这些误差信号非常难以去除调制信号，但可以将其应用于在一段时间内使总误差最小化的集成光学芯片。 通过向感测线圈的相对输入提供不同但相互关联的调制信号，在调制信号的周期内可将各种偏振误差平均为零。

公开(公告)号：US5377283A

公开(公告)日：1994-12-27

申请号：US49185

申请日：1993-04-16

Applicant: James N. Blake ,  John R. Feth ,  Bogdan Szafraniec

Inventor： James N. Blake ,  John R. Feth ,  Bogdan Szafraniec

IPC: G01C19/72 ,  G02B6/00 ,  G02F1/01 ,  G02B6/26

CPC classification number: G01C19/721

Abstract: An optical fiber rotation sensor having an ordinary single mode fiber coil with a depolarizer in series therewith configured with component optical path lengths therein and birefringent axes relationships therein chosen with respect to the source autocorrelation. Amplitude related phase errors due to polarization mode coupling can be eliminated or reduced economically, and signal fading can be substantially prevented.

Abstract translation: 一种具有普通单模光纤线圈的光纤旋转传感器，其具有串联的去偏振器，其中配置有分量光路长度，并且相对于源自相关选择双折射轴关系。 由于偏振模耦合引起的振幅相关误差可以经济地消除或降低，并且可以显着地防止信号衰落。

公开(公告)号：US5289258A

公开(公告)日：1994-02-22

申请号：US821030

申请日：1992-01-15

Applicant: Bogdan Szafraniec ,  Richard H. Frische ,  Richard J. August ,  Kevin B. Dimond ,  Dick Ang ,  James N. Blake ,  John R. Feth

Inventor： Bogdan Szafraniec ,  Richard H. Frische ,  Richard J. August ,  Kevin B. Dimond ,  Dick Ang ,  James N. Blake ,  John R. Feth

IPC: G01C19/72 ,  G02F1/01

CPC classification number: G01C19/72

Abstract: An error control arrangement for an optical fiber rotation sensor having electromagnetic waves propagating in opposite directions passing through a bias optical phase modulator operated by a phase modulation generator both of which can contribute second harmonic distortion resulting in errors in the sensor output signal which are controlled. Control of the bias optical phase modulator contribution for a modulator having a piezoelectric body wrapped with an optical fiber portion is accomplished by mounting the body utilizing layers having nonlinear stiffness.

Abstract translation: 一种光纤旋转传感器的误差控制装置，其具有通过相位调制发生器操作的偏置光相位调制器的相反方向传播的电磁波，这两者都可以产生二次谐波失真，从而导致传感器输出信号中被控制的误差。 对具有用光纤部分包裹的压电体的调制器的偏置光学相位调制器贡献的控制通过使用具有非线性刚度的层来安装本体来实现。

公开(公告)号：US07038786B2

公开(公告)日：2006-05-02

申请号：US10271523

申请日：2002-10-15

Applicant: James N. Blake

Inventor： James N. Blake

IPC: G01B9/02

CPC classification number: G01D5/35303

Abstract: In accordance with the preset invention, an optical interferometer employed as a current sensor is provided with visibility compensation and scale factor compensation. In accordance with the present invention, the interferometer is constructed so as to propagate a pair of optical beams along a defined optical path, where the optical interferometer includes a pair of optical beams that travel along at least a portion of the defined optical path such that a phase shift is induced between the pair of optical beams in response to a measureand, for example electrical current. At least one photodetector is responsive to at least a portion of the sum of the pair of optical beams and provide a beam output signal indicate thereof. From the beam output signal, a first signal is derived that is indicative of the visibility of the interferometer. A signal processor derives from the beam output signal an output signal indicative of the bias point of the interferometer, where the bias point is indicative of the induced phase shift in response to the measurand. A compensated interferometer output signal indicative of the induced phase shift is derived as a function of the visibility signal and bias point signal. In a specific embodiment of the invention, the visibility signal may simply be the output of a signal averaging circuit which in turn may adjust the gain of the signal processing circuit.

Abstract translation: 根据本发明，用作电流传感器的光学干涉仪具有可见度补偿和比例因子补偿。 根据本发明，干涉仪被构造成沿着限定的光路传播一对光束，其中光学干涉仪包括沿着限定的光路的至少一部分行进的一对光束，使得 响应于测量并且例如电流，在该对光束之间产生相移。 至少一个光电检测器响应于该对光束的总和的至少一部分，并提供其指示的光束输出信号。 从光束输出信号，导出指示干涉仪的可视性的第一信号。 信号处理器从光束输出信号中导出指示干涉仪的偏置点的输出信号，其中偏置点表示响应于被测量的感应相移。 作为可见度信号和偏置点信号的函数导出指示感应相移的补偿干涉仪输出信号。 在本发明的具体实施例中，可见度信号可以简单地是信号平均电路的输出，信号平均电路又可以调整信号处理电路的增益。

公开(公告)号：US06188811B1

公开(公告)日：2001-02-13

申请号：US09183977

申请日：1998-10-31

Applicant: James N. Blake

Inventor： James N. Blake

IPC: G02B600

CPC classification number: G01R33/0322 ,  G01R15/246

Abstract: A current sensor having an optmized optical fiber coil for sensing the magnetic field of a current of wire passing by or through the coil. The coil is optimally spun such that a particular ratio of the spin rate to the intrinsic polarization beat length is such for best maintenance of the circular polarization state of the light in the coil. The coil fiber may also be Terbium doped for greater sensitivity. The phase or birefringence modulation of the light may be piezoelectric or electro-optic. A Faraday rotator may be used in place of those modulators. The system may be open loop or closed loop. The feedback scheme may be via the modulator or the phase nulling current affecting the sensing coil.

Abstract translation: 一种具有优化的光纤线圈的电流传感器，用于感测由线圈通过或穿过线圈的电流的磁场。 线圈被最佳旋转，使得旋转速率与本征极化拍子长度的特定比率是为了最好地维持线圈中的光的圆偏振状态。 线圈光纤也可以掺杂铽，以提高灵敏度。 光的相位或双折射调制可以是压电或电光。 可以使用法拉第旋转器代替那些调制器。 该系统可以是开环或闭环。 反馈方案可以经由调制器或影响感测线圈的相位零点电流。

公开(公告)号：US4915468A

公开(公告)日：1990-04-10

申请号：US245717

申请日：1988-09-16

Applicant: Byoung Y. Kim ,  James N. Blake

Inventor： Byoung Y. Kim ,  James N. Blake

IPC: G01D5/34 ,  G02B6/10 ,  G02B6/24 ,  G02B6/28 ,  G02B6/34 ,  G02F1/01

CPC classification number: G02F1/0134 ,  G01D5/344 ,  G02B6/105 ,  G02B6/24 ,  G02B6/2821 ,  G02B6/02047 ,  G02B6/2726 ,  G02B6/29332

Abstract: An apparatus utilizes a two-mode optical waveguide with a non-circular core to provide stable spatial intensity patterns in both propagation modes for light propagating therein. The light has a wavelength, and the non-circular core has cross-sectional dimensions selected such that (1) the waveguide propagates light at that wavelength in a fundamental mode and a higher order mode, and (2) substantially all of the light in the higher order mode propagates in only a single, stable intensity pattern. Embodiments of the invention include, for example, modal couplers, frequency shifters, mode selectors and interferometers. One of the interferometer embodiments may be used as a strain gauge.

Abstract translation: 一种装置利用具有非圆形芯的双模式光波导以在其中传播的光的两种传播模式中提供稳定的空间强度图案。 光具有波长，并且非圆形芯具有选择的截面尺寸，使得（1）波导以基模和高阶模式传播该波长处的光，以及（2）基本上所有的光在 高阶模式仅传播一个稳定的强度模式。 本发明的实施例包括例如模耦合器，移频器，模式选择器和干涉仪。 干涉仪实施例之一可以用作应变仪。

公开(公告)号：US08922194B2

公开(公告)日：2014-12-30

申请号：US13395282

申请日：2010-09-10

Applicant: James N. Blake ,  Carl Glasow

Inventor： James N. Blake ,  Carl Glasow

IPC: G01R31/00 ,  G01R33/032

CPC classification number: G01R33/032

Abstract: A master-slave current sensor system for measuring, for example, differential current on a transmission line is described. The slave current sensor can be periodically recalibrated (or have a compensation value re-calculated) based on the master sensor's average output, and the slave sensor can be unpowered and remote from an electronics box which receives its measurements. Health monitoring and fault location can also be performed using the master-slave optical current sensor system, optionally in conjunction with one or more voltage sensors.

Abstract translation: 描述用于测量例如传输线上的差分电流的主从电流传感器系统。 可以根据主传感器的平均输出，对从电流传感器进行周期性的重新校准（或重新计算补偿值），而从属传感器则可以从接收其测量的电子设备盒中取消供电和远距离。 健康监测和故障定位也可以使用主从光电流传感器系统进行，可选地与一个或多个电压传感器结合使用。

公开(公告)号：US07233746B2

公开(公告)日：2007-06-19

申请号：US10354798

申请日：2003-01-29

Applicant: James N. Blake ,  James D. Hrabliuk ,  Farnoosh Rahmatian

Inventor： James N. Blake ,  James D. Hrabliuk ,  Farnoosh Rahmatian

IPC: H04J10/06

CPC classification number: G01R15/24 ,  G01R21/133

Abstract: A sensor provides an analog sensor output signal that is first converted by a A/D converter, followed by a digital signal processor having a digital signal output that is converted to an analog signal by way of a D/A converter so as to provide an analog information output signal indicative of a parameter quantity intended to be sensed. An analog dither signal and/or a digital dither signal is provided for modulating the A/D converter input signal and/or D/A converter input signal, respectively, separately, or in combination, to enhance dynamic range accuracy of the resultant analog information output signal representative of the quantity of the parameter intended to be sensed.

公开(公告)号：US06285182B1

公开(公告)日：2001-09-04

申请号：US09207371

申请日：1998-12-08

Applicant: James N. Blake ,  Charles H. Lange

Inventor： James N. Blake ,  Charles H. Lange

IPC: G01R3100

CPC classification number: G01R15/24

Abstract: A true dV/dt voltage sensor having no need for a ground reference for measurement. The sensor is connected at two places on the electric line to be measured. The voltage wave has a delay between the two places on the line and the difference is sensed and converted into a voltage measurement. Another approach is to connect the sensor at one place on the electric line. This approach has the second connection through a phase delay circuit that has an input connected to the same place. The delay between the one connection and the output of the phase delay circuit is sensed and converted into a voltage measurement. The sensed difference is a voltage, which is applied across a device, such as an electro-optic crystal, an integrated optic circuit (IOC) or a Mach Zehnder interferometer, which is a light medium that has a birefringence or an index of refraction that varies with changes of applied voltage. The variation of birefringence changes the polarization state of the light going through the device. The intensity of at least one polarization of light is detected and converted to an electrical signal. The intensity of the two interfering light beams from the legs of the Mach Zehnder interferometer is a function of the measured voltage. The electrical signal is integrated into a signal indicative of the magnitude of the voltage being measured on the electric line.

Abstract translation: 真正的dV / dt电压传感器，不需要测量的接地参考。 传感器连接在要测量的电线上的两个位置。 电压波在线路上的两个位置之间具有延迟，并且差异被感测并转换成电压测量。 另一种方法是将传感器连接在电线的一个位置。 该方法具有通过相位延迟电路的第二连接，该相位延迟电路具有连接到相同位置的输入端。 相位延迟电路的一个连接和输出之间的延迟被感测并转换成电压测量。 所感测到的差异是施加在诸如电光晶体，集成光学电路（IOC）或马赫曾德尔干涉仪之类的器件上的电压，该干涉仪是具有双折射或折射率的光介质， 随施加电压的变化而变化。 双折射的变化改变了穿过器件的光的偏振状态。 光的至少一个极化的强度被检测并转换成电信号。 来自马赫曾德干涉仪的腿部的两个干涉光束的强度是测量电压的函数。 电信号被集成到指示在电线上测量的电压的大小的信号中。