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1. 发明授权

US06175410B1 Fiber optic gyroscope having modulated suppression of co-propagating and counter-propagating polarization errors 有权
标题翻译：具有调制抑制共同传播和反向传播偏振误差的光纤陀螺仪
公开(公告)号：US06175410B1
公开(公告)日：2001-01-16
申请号：US09215581
申请日：1998-12-17
申请人： Bogdan Szafraniec , James N. Blake , Charles H. Lange , Lee K. Strandjord
发明人： Bogdan Szafraniec , James N. Blake , Charles H. Lange , Lee K. Strandjord
IPC分类号： G01C1972
CPC分类号： G01C19/721
摘要： 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.
摘要翻译：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。

2. 发明授权

US5559908A Method for damping optical fiber on a bias optical phase modulator 失效
标题翻译：偏置光相位调制器阻尼光纤的方法
公开(公告)号：US5559908A
公开(公告)日：1996-09-24
申请号：US468783
申请日：1995-06-06
申请人： Richard J. August , Kevin B. Dimond , John R. Feth , Clarence E. Laskoskie , Lee K. Strandjord , Bogdan Szafraniec
发明人： Richard J. August , Kevin B. Dimond , John R. Feth , Clarence E. Laskoskie , Lee K. Strandjord , Bogdan Szafraniec
IPC分类号： G01C19/72 , G02B6/00 , G02B6/44 , G02F1/01 , G01B9/02
CPC分类号： G01C19/722 , G01C19/72 , G02F1/0134 , G02B6/4457
摘要： A method for damping an optical fiber on a bias optical phase modulator having two optical fiber leads comprises the steps of securing the bias phase modulator, applying a silicone or acrylate type of substance to an outward facing surface of the fiber wound on the bias phase modulator means, applying the silicone or acrylate type of substance on the two optical fiber leads for at least 0.5 inch (1.28 cm.) along each lead which is apart from the place where the optical fiber wound on the bias phase modulator, frequently brushing or smoothing out the applied silicone or acrylate type of substance until the substance beings to set, and drying the substance on the optical fiber until the substance is cured. The applied damping material significantly reduces an amplitude of a frequency caused by mechanical vibrations in a rotation sensor.
摘要翻译：一种用于在具有两个光纤引线的偏置光学相位调制器上对光纤进行阻尼的方法包括以下步骤：确定偏置相位调制器，将硅或丙烯酸酯类型的物质施加到缠绕在偏置相位调制器上的光纤向外的表面上意味着将两种光纤引线上的硅酮或丙烯酸酯类型的物质沿着沿着偏离相位调制器上缠绕光纤的位置的每个引线至少0.5英寸（1.28厘米）施加，经常刷涂或平滑将所施用的硅酮或丙烯酸酯类物质直到物质固化，并干燥光纤上的物质直到物质固化。所施加的阻尼材料显着降低由旋转传感器中的机械振动引起的频率振幅。

3. 发明授权

US5457532A Harmonic phase modulation error reducer 失效
标题翻译：谐波相位调制误差减法器
公开(公告)号：US5457532A
公开(公告)日：1995-10-10
申请号：US250970
申请日：1994-05-31
申请人： Richard J. August , Kevin B. Dimond , John R. Feth , Clarence E. Laskoskie , Lee K. Strandjord , Bogdan Szafraniec
发明人： Richard J. August , Kevin B. Dimond , John R. Feth , Clarence E. Laskoskie , Lee K. Strandjord , Bogdan Szafraniec
IPC分类号： G01C19/72 , G02B6/00 , G02B6/44 , G02F1/01
CPC分类号： G01C19/722 , G01C19/72 , G02F1/0134 , G02B6/4457
摘要： A rotation sensor for sensing rotation, particularly about an axis of a coiled optical fiber, wherein the coiled optical fiber has with light waves propagating in opposite directions in the coiled optical fiber, the phase relationship of the counter-propagating light waves providing a basis for indicating rotation of the sensor. A portion of the coiled optical fiber is a part of and affected by a bias optical phase modulator which causes a varying phase relationship between the light waves at a fundamental frequency. However, the varying phase relation ship has at least one harmonic which is due to mechanical vibration of the optical fiber that is a part of the modulator. This harmonic contributes to an erroneous indication of rotation. The amplitude of such harmonic is reduced by lowering the Q of the resonating fiber. This is effected by applying a damping material to the optical fiber and a portion of the modulator. A photodetector detects the counter-propagating waves and sends a corresponding electrical signal on to a signal component selection device that provides an indication of sensed rotation, including error due to the mechanically resonating optical fiber of the modulator.
摘要翻译：一种用于感测旋转的旋转传感器，特别是围绕卷绕的光纤的轴线的旋转传感器，其中线圈式光纤具有在线圈化光纤中沿相反方向传播的光波，反向传播光波的相位关系为指示传感器的旋转。卷绕的光纤的一部分是偏置光相位调制器的一部分并受其影响，该偏置光相位调制器导致基频处的光波之间的变化的相位关系。然而，变化的相位关系船具有至少一个谐波，其归因于作为调制器的一部分的光纤的机械振动。这种谐波有助于错误的旋转指示。通过降低谐振光纤的Q来减小这种谐波的振幅。这通过将阻尼材料施加到光纤和调制器的一部分来实现。光电检测器检测反向传播波，并将相应的电信号发送到信号分量选择装置，信号分量选择装置提供感测旋转的指示，包括由调制器的机械谐振光纤引起的误差。

4. 发明授权

US5781300A Backscatter error reducer for interferometric fiber optic gyroscope 失效
标题翻译：用于干涉光纤陀螺仪的后向散射误差减小器
公开(公告)号：US5781300A
公开(公告)日：1998-07-14
申请号：US741464
申请日：1996-10-31
申请人： Lee K. Strandjord , Glen A. Sanders , Bogdan Szafraniec , Ralph A. Bergh
发明人： Lee K. Strandjord , Glen A. Sanders , Bogdan Szafraniec , Ralph A. Bergh
IPC分类号： G01C19/72
CPC分类号： G01C19/72
摘要： A backscatter or secondary wave error reducer for an interferometric fiber optic gyroscope having at least one phase modulator for receiving a square wave bias phase modulation signal and a sine wave carrier suppression modulation signal. The amplitude of the carrier suppression modulation signal is sufficient to greatly reduce the interference between two sets of backscattered or secondary waves of light originating in the Sagnac loop of the gyroscope. Reduction or elimination of the interference of the two sets of secondary waves reduces or eliminates the secondary wave induced rotation rate sensing error. The frequency of the carrier suppression signal is near or equal to an even harmonic of the proper frequency of the Sagnac loop to reduce the sinusoidal or periodic rotation rate sensing error caused by the carrier suppression modulation signal.
摘要翻译：一种用于干涉光纤陀螺仪的后向散射或二次波衰减器，其具有用于接收方波偏置相位调制信号和正弦波载波抑制调制信号的至少一个相位调制器。载波抑制调制信号的幅度足以大大减少源自陀螺仪的Sagnac回路的两组反向散射光或二次波之间的干扰。减少或消除两组二次波的干扰减少或消除二次波感应的旋转速率感测误差。载波抑制信号的频率接近或等于Sagnac环路的适当频率的偶次谐波，以减少由载波抑制调制信号引起的正弦或周期性转速检测误差。

5. 发明授权

US5469257A Fiber optic gyroscope output noise reducer 失效
标题翻译：光纤陀螺输出降噪器
公开(公告)号：US5469257A
公开(公告)日：1995-11-21
申请号：US158116
申请日：1993-11-24
申请人： James N. Blake , Glen A. Sanders , Lee K. Strandjord
发明人： James N. Blake , Glen A. Sanders , Lee K. Strandjord
IPC分类号： G01C19/72
CPC分类号： G01C19/721
摘要： A noise reducer for reducing the results in the system output signal of optical noise introduced into an optical subsystem therein, having a phase modulator, by a source through obtaining a noise representation signal used to offset the noise components in the signal obtained from the output of the optical subsystem. This noise representation signal is not delayed in the obtaining thereof by any more than half the delays of the waves emitted from the source in reaching the optical subsystem output. The noise reducer may incorporate a device for adjusting the amplitude of the noise representation signal. It may also include another device for adjusting the phase of the noise representation signal, which may be used to affect the amplitude of the noise representation signal. These adjustments can result in an optimization of the noise representation signal so as to better effectively cancel the optical noise signal at the output of the fiber optic gyro having the noise reducer. The phase adjustment may be accomplished by affecting the phase of the bias modulation signal that goes to demodulate the fiber optic gyroscope system output signal or to demodulate both the fiber optic gyroscope system output signal and the noise representation signal, before the two latter signals are combined. A generator may be used for constructing a periodic signal, such as a triangular wave, having an appropriate amplitude and phase, to be a noise representation signal that is used to offset or cancel the noise components in the output signal from the fiber optic gyroscope system.
摘要翻译：一种降噪器，用于通过获得噪声表示信号来减少引入到其中的光学子系统中的光学子系统中的光学系统输出信号的结果，该信号由相位调制器通过获得用于偏移从输出中获得的信号中的噪声分量的噪声表示信号光子系统。在获得噪声表示信号时，该噪声表示信号在到达光学子系统输出时从源发射的波的延迟的一半以上不被延迟。降噪器可以包括用于调整噪声表示信号的幅度的装置。它还可以包括用于调整噪声表示信号的相位的另一装置，其可以用于影响噪声表示信号的幅度。这些调整可以导致噪声表示信号的优化，以便更有效地抵消具有降噪器的光纤陀螺仪的输出处的光噪声信号。相位调整可以通过在两个后一个信号组合之前影响去解调光纤陀螺仪系统输出信号或解调光纤陀螺仪系统输出信号和噪声表示信号的偏置调制信号的相位。发生器可以用于构造具有适当的幅度和相位的诸如三角波的周期信号，作为用于偏移或消除来自光纤陀螺仪系统的输出信号中的噪声分量的噪声表示信号。

6. 发明授权

US08908187B2 System and method for reducing errors in a resonator fiber optic gyroscope 有权
标题翻译：用于减少谐振器光纤陀螺仪中的误差的系统和方法
公开(公告)号：US08908187B2
公开(公告)日：2014-12-09
申请号：US13287422
申请日：2011-11-02
申请人： Lee K. Strandjord , Tiequn Qiu , Glen A. Sanders
发明人： Lee K. Strandjord , Tiequn Qiu , Glen A. Sanders
IPC分类号： G01C19/64 , G01C19/72
CPC分类号： G01C19/727 , G01C19/722
摘要： An exemplary resonator fiber optic gyroscope comprises a resonator having an optical fiber loop; a light source configured to generate a light beam; and an intensity modulation circuit coupled between the light source and the resonator. The intensity modulation circuit is configured to modulate the intensity of the light beam from the light source to output an intensity modulated signal to the resonator. The intensity modulation circuit is configured to produce the intensity modulated signal such that harmonics of the intensity modulated signal which overlap a primary wave of a counter-propagating light beam in the resonator have an amplitude below a predetermined threshold. Amplitudes below the predetermined threshold are negligible.
摘要翻译：一种示例性的谐振器光纤陀螺仪包括具有光纤回路的谐振器; 被配置为产生光束的光源; 以及耦合在光源和谐振器之间的强度调制电路。强度调制电路被配置为调制来自光源的光束的强度，以将强度调制信号输出到谐振器。强度调制电路被配置为产生强度调制信号，使得与谐振器中的相反传播光束的主波重叠的强度调制信号的谐波具有低于预定阈值的幅度。低于预定阈值的幅度可以忽略不计。

7. 发明授权

US07855789B2 RFOG modulation error correction 有权
标题翻译： RFOG调制纠错
公开(公告)号：US07855789B2
公开(公告)日：2010-12-21
申请号：US12167056
申请日：2008-07-02
申请人： Lee K. Strandjord , Glen A. Sanders
发明人： Lee K. Strandjord , Glen A. Sanders
IPC分类号： G01C19/72
CPC分类号： G01C19/727
摘要： Systems and methods for performing modulation error correction. An example system applies common phase/frequency modulation to first and second laser beams, a first intensity modulation to the first modulated beam, and a second intensity modulation to the second modulated beam. Signals outputted are demodulated according to the frequency of the common phase/frequency modulation. Then the first of these demodulated signals is demodulated based on the frequency of the intensity modulation of the first beam, and the second of these demodulated signals is demodulated based on the frequency of the intensity modulation of the second beam. Then, rate of rotation is determined based on demodulated signals. Frequencies of the intensity modulations are unequal and not harmonically related, and intensity modulation encodes each light beam with a unique signature.
摘要翻译：用于执行调制误差校正的系统和方法。示例性系统将共同相位/频率调制应用于第一和第二激光束，对第一调制光束进行第一强度调制，以及对第二调制光束进行第二强度调制。输出的信号根据共同相位/频率调制的频率进行解调。然后，基于第一光束的强度调制的频率对这些解调信号中的第一个进行解调，并且基于第二光束的强度调制的频率对这些解调信号中的第二个进行解调。然后，基于解调信号确定旋转速率。强度调制的频率是不相等的，而不是谐波相关的，强度调制对每个光束进行独特的签名编码。

8. 发明申请

US20100253948A1 SYSTEMS AND METHODS FOR RESONATOR FIBER OPTIC GYROSCOPE INTENSITY MODULATION CONTROL 有权
标题翻译：谐振光纤陀螺强度调制控制系统与方法
公开(公告)号：US20100253948A1
公开(公告)日：2010-10-07
申请号：US12729660
申请日：2010-03-23
申请人： Lee K. Strandjord , Glen A. Sanders , Norman Gerard Tarleton
发明人： Lee K. Strandjord , Glen A. Sanders , Norman Gerard Tarleton
IPC分类号： G01C19/72
CPC分类号： G01C19/727
摘要： Systems and methods for improved resonator fiber optic gyroscope intensity modulation control are provided. In one embodiment, a resonant fiber optic gyroscope (RFOG) having a residual intensity modulation (RIM) controller comprises: an intensity modulator optically coupled to receive a light beam from a laser source modulated at a resonance detection modulation frequency; an optical tap device optically coupled to the intensity modulator; and a feedback servo coupled to the optical tap device and the intensity modulator, the demodulating feedback servo generating a sinusoidal feedback signal to the intensity modulator. The feedback servo adjusts an amplitude and phase of the sinusoidal feedback signal provided to intensity modulator based on a residual intensity modulation detected by the demodulating feedback servo.
摘要翻译：提供了改进谐振器光纤陀螺仪强度调制控制的系统和方法。在一个实施例中，具有残余强度调制（RIM）控制器的谐振光纤陀螺仪（RFOG）包括：光耦合的光强调制器，用于接收来自以谐振检测调制频率调制的激光源的光束; 与所述强度调制器光耦合的光学抽头装置; 以及耦合到光学抽头装置和强度调制器的反馈伺服器，解调反馈伺服器向强度调制器产生正弦反馈信号。基于由解调反馈伺服检测到的残余强度调制，反馈伺服调节提供给强度调制器的正弦反馈信号的幅度和相位。

9. 发明授权

US07583384B2 High resolution IOC drive and method for driving fiber optic gyroscopes 有权
标题翻译：高分辨率IOC驱动器和驱动光纤陀螺仪的方法
公开(公告)号：US07583384B2
公开(公告)日：2009-09-01
申请号：US11495266
申请日：2006-07-27
申请人： Gregory W. Keith , Thomas C. Greening , Lee K. Strandjord
发明人： Gregory W. Keith , Thomas C. Greening , Lee K. Strandjord
IPC分类号： G01C19/72
CPC分类号： G01C19/726
摘要： Methods and system are provided for driving light through a sensing coil of an optical gyro. The system includes a photodetection circuit having an input for receiving an optical output from the sensing coil and having an output, and a signal processing circuit having an input coupled to the output of the photodetection circuit and having an output for supplying an output signal to modulate the sensing coil. The photodetection system produces a digital signal from the optical output. The signal processing circuit produces a feedback signal from the digital signal and adds a random number to the feedback signal to produce the output signal.
摘要翻译：提供了用于通过光学陀螺仪的感测线圈驱动光的方法和系统。该系统包括光电检测电路，其具有用于接收来自感测线圈的光输出并具有输出的输入端，以及信号处理电路，其具有耦合到光电检测电路的输出的输入端并具有用于提供输出信号以进行调制的输出传感线圈。光电检测系统产生来自光输出的数字信号。信号处理电路从数字信号产生反馈信号，并向反馈信号添加随机数以产生输出信号。

10. 发明授权

US07522284B2 Optical resonator gyro and method for reducing resonance asymmetry errors 有权
标题翻译：光谐振陀螺和减少谐振不对称误差的方法
公开(公告)号：US07522284B2
公开(公告)日：2009-04-21
申请号：US11540771
申请日：2006-09-29
申请人： Glen A. Sanders , Lee K. Strandjord , Tiequn Qiu
发明人： Glen A. Sanders , Lee K. Strandjord , Tiequn Qiu
IPC分类号： G01C19/72
CPC分类号： G01C19/727
摘要： Methods and apparatus are provided for attenuating rotation rate errors in a resonator gyro. The gyro includes a ring resonator having a hollow core optical fiber coil and optical elements that are selected and/or oriented to reduce stray light that may be present in input light beams introduced to the ring resonator. The resonator has a predetermined mode. One of the optical elements partially transmits a portion of the input light beam to a first end of the fiber coil while partially transmitting a portion of the input light beam to a filter. Light having the predetermined mode is accepted into the first end of the fiber coil, and the filter accepts light of the input light beam having a corresponding mode. Transmission components of the circulating light beams indicates resonance peaks of the counter-propagating directions of the ring resonator.
摘要翻译：提供了用于衰减谐振器陀螺仪中的转速误差的方法和装置。陀螺仪包括具有中空纤芯光纤线圈的环形谐振器和选择和/或取向以减少可能存在于引入环形谐振器的输入光束中的杂散光的光学元件。谐振器具有预定模式。一个光学元件将输入光束的一部分部分地传输到光纤线圈的第一端，同时部分地将输入光束的一部分传输到滤光器。具有预定模式的光被接受到光纤线圈的第一端，并且滤光器接受具有相应模式的输入光束的光。循环光束的透射分量表示环形谐振器的相反传播方向的共振峰值。

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