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1. 发明申请

US20100033729A1 BIAS-INSTABILITY REDUCTION IN FIBER OPTIC GYROSCOPES 失效
标题翻译：光纤陀螺中的偏置不稳定性降低
公开(公告)号：US20100033729A1
公开(公告)日：2010-02-11
申请号：US12187932
申请日：2008-08-07
申请人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
发明人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
IPC分类号： G01C19/72 , G06G7/48
CPC分类号： G01C19/64
摘要： A computer-implementable method of reducing bias instability in a fiber optic gyroscope includes receiving, with a computer, a first data set enabling the computer to generate a model of the gyroscope, including a light source, a photodetector, and a plurality of optical components and fiber sections coupling the light source to the photodetector, and a light signal to be propagated from the light source to the photodetector. The light signal has an associated wavelength spectrum. For each wavelength of the spectrum, the relative lightwave intensity reaching the photodetector is calculated. A signal-wave intensity and a spurious-wave intensity are determined from the calculated relative lightwave intensities. A scale factor is determined from the signal-wave intensity. The spurious-wave intensity is integrated over the wavelength spectrum of the light source to obtain a total spurious-wave intensity. A rate bias error is determined based on the total spurious-wave intensity and the scale factor.
摘要翻译：一种降低光纤陀螺仪中的偏压不稳定性的计算机可实现的方法包括：利用计算机接收第一数据组，使得该计算机能够生成陀螺仪的模型，该模型包括光源，光电检测器和多个光学部件以及将光源耦合到光电检测器的光纤部分，以及从光源传播到光电检测器的光信号。光信号具有相关的波长谱。对于光谱的每个波长，计算到达光电检测器的相对光波强度。从计算的相对光波强度确定信号波强度和寄生波强度。从信号波强度确定比例因子。寄生波强度集成在光源的波长光谱上，以获得总的杂散波强度。基于总杂散波强度和比例因子确定速率偏差误差。

2. 发明申请

US20100316332A1 BIAS-INSTABILITY REDUCTION IN FIBER OPTIC GYROSCOPES 有权
标题翻译：光纤陀螺中的偏置不稳定性降低
公开(公告)号：US20100316332A1
公开(公告)日：2010-12-16
申请号：US12848592
申请日：2010-08-02
申请人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
发明人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
IPC分类号： G02B6/26 , G01C19/72
CPC分类号： G01C19/64
摘要： Apparatus for providing Bias-Instability reduction in Fiber Optic Gyroscopes are provided. In one embodiment, an optical circuit for a fiber optic gyroscope having a broadband light source and an optical fiber loop comprises: a PM fiber of length v; an IOC coupled to the PM fiber via a pigtail of length d1, a second pigtail with length of d2, and a third pigtail with length of d3; a splitter that splits light received from the first pigtail into a first and second beams directed to the second and third pigtails; and a depolarizer circuit coupled to said fiber loop including a first fiber section of length x, a second fiber section of length z, a third fiber section of length w and a fourth fiber section of length y; and wherein the lengths of v, x, y, d1 and d3 are proportioned to avoid regions of high bias instability.
摘要翻译：提供了用于在光纤陀螺仪中提供偏压不均匀性的设备。在一个实施例中，用于具有宽带光源和光纤回路的光纤陀螺仪的光学电路包括：长度为v的PM光纤; 通过长度为d1的尾纤和长度为d2的第二尾纤和长度为d3的第三尾纤耦合到PM光纤的IOC; 分离器，其将从所述第一尾纤接收的光分成指向所述第二和第三尾纤的第一和第二光束; 以及耦合到所述光纤回路的消偏振器电路，包括长度为x的第一光纤部分，长度为z的第二光纤部分，长度为w的第三光纤部分和长度为y的第四光纤部分; 并且其中v，x，y，d1和d3的长度成比例，以避免高偏压不稳定性的区域。

3. 发明授权

US07894073B2 Bias-instability reduction in fiber optic gyroscopes 有权
标题翻译：光纤陀螺仪偏压不稳定性
公开(公告)号：US07894073B2
公开(公告)日：2011-02-22
申请号：US12848592
申请日：2010-08-02
申请人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
发明人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
IPC分类号： G01C19/72
CPC分类号： G01C19/64
摘要： Apparatus for providing Bias-Instability reduction in Fiber Optic Gyroscopes are provided. In one embodiment, an optical circuit for a fiber optic gyroscope having a broadband light source and an optical fiber loop comprises: a PM fiber of length v; an IOC coupled to the PM fiber via a pigtail of length d1, a second pigtail with length of d2, and a third pigtail with length of d3; a splitter that splits light received from the first pigtail into a first and second beams directed to the second and third pigtails; and a depolarizer circuit coupled to said fiber loop including a first fiber section of length x, a second fiber section of length z, a third fiber section of length w and a fourth fiber section of length y; and wherein the lengths of v, x, y, d1 and d3 are proportioned to avoid regions of high bias instability.
摘要翻译：提供了用于在光纤陀螺仪中提供偏压不均匀性的设备。在一个实施例中，用于具有宽带光源和光纤回路的光纤陀螺仪的光学电路包括：长度为v的PM光纤; 通过长度为d1的尾纤和长度为d2的第二尾纤和长度为d3的第三尾纤耦合到PM光纤的IOC; 分离器，其将从所述第一尾纤接收的光分成指向所述第二和第三尾纤的第一和第二光束; 以及耦合到所述光纤回路的消偏振器电路，包括长度为x的第一光纤部分，长度为z的第二光纤部分，长度为w的第三光纤部分和长度为y的第四光纤部分; 并且其中v，x，y，d1和d3的长度成比例，以避免高偏压不稳定性的区域。

4. 发明授权

US07777889B2 Bias-instability reduction in fiber optic gyroscopes 失效
标题翻译：光纤陀螺仪偏压不稳定性
公开(公告)号：US07777889B2
公开(公告)日：2010-08-17
申请号：US12187932
申请日：2008-08-07
申请人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
发明人： Tiequn Qiu , Steven J. Sanders , Sorin Mosor , Glen A. Sanders
IPC分类号： G01C19/72
CPC分类号： G01C19/64
摘要： A computer-implementable method of reducing bias instability in a fiber optic gyroscope includes receiving, with a computer, a first data set enabling the computer to generate a model of the gyroscope, including a light source, a photodetector, and a plurality of optical components and fiber sections coupling the light source to the photodetector, and a light signal to be propagated from the light source to the photodetector. The light signal has an associated wavelength spectrum. For each wavelength of the spectrum, the relative lightwave intensity reaching the photodetector is calculated. A signal-wave intensity and a spurious-wave intensity are determined from the calculated relative lightwave intensities. A scale factor is determined from the signal-wave intensity. The spurious-wave intensity is integrated over the wavelength spectrum of the light source to obtain a total spurious-wave intensity. A rate bias error is determined based on the total spurious-wave intensity and the scale factor.
摘要翻译：一种降低光纤陀螺仪中的偏压不稳定性的计算机可实现的方法包括：利用计算机接收第一数据组，使得该计算机能够生成陀螺仪的模型，该模型包括光源，光电检测器和多个光学部件以及将光源耦合到光电检测器的光纤部分，以及从光源传播到光电检测器的光信号。光信号具有相关的波长谱。对于光谱的每个波长，计算到达光电检测器的相对光波强度。从计算的相对光波强度确定信号波强度和寄生波强度。从信号波强度确定比例因子。寄生波强度集成在光源的波长光谱上，以获得总的杂散波强度。基于总杂散波强度和比例因子确定速率偏差误差。

5. 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。

6. 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。

7. 发明授权

US08446589B2 Residual intensity modulation (RIM) control loop in a resonator fiber-optic gyroscope (RFOG) 有权
标题翻译：谐振器光纤陀螺仪（RFOG）中的残余强度调制（RIM）控制回路
公开(公告)号：US08446589B2
公开(公告)日：2013-05-21
申请号：US12581715
申请日：2009-10-19
申请人： Lee Strandjord , Glen A. Sanders , Tiequn Qiu
发明人： Lee Strandjord , Glen A. Sanders , Tiequn Qiu
IPC分类号： G01C19/72
CPC分类号： G01C19/727
摘要： Systems and methods for reducing intensity modulation-induced rotation rate measurement error in a resonator optical gyroscope. The method includes tapping an intensity modulated light beam, directing a portion of the tapped light beam toward a photo detector, outputting from the photo detector a signal proportional to the amplitude variation of the light beam, amplifying the signal, and then providing the signal to the intensity modulator as a control input. Intensity modulation-induced error is reduced by an amount proportional to the gain of the feedback loop.
摘要翻译：用于减小谐振器光学陀螺仪中强度调制诱发的旋转速率测量误差的系统和方法。该方法包括敲击强度调制光束，将一部分抽头光束导向光电检测器，从光电检测器输出与光束的幅度变化成比例的信号，放大信号，然后将信号提供给强度调制器作为控制输入。强度调制诱发误差减小与反馈回路增益成比例的量。

8. 发明申请

US20130107271A1 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中的误差的系统和方法
公开(公告)号：US20130107271A1
公开(公告)日：2013-05-02
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： G01C19/72
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。

9. 发明申请

US20120300198A1 FREQUENCY STABILIZED LASER SYSTEM 有权
标题翻译：频率稳定激光系统
公开(公告)号：US20120300198A1
公开(公告)日：2012-11-29
申请号：US13457929
申请日：2012-04-27
申请人： Jianfeng Wu , Jennifer S. Strabley , Tiequn Qiu , Glen A. Sanders
发明人： Jianfeng Wu , Jennifer S. Strabley , Tiequn Qiu , Glen A. Sanders
IPC分类号： G01C1/10 , H01S3/13
CPC分类号： H01S5/06258 , G03F7/70525 , H01S5/0687
摘要： A laser stabilization system includes laser source having first and second ends; first waveguide portion having first and second ends, first end of first waveguide portion coupled to first end of laser source; second waveguide portion having first and second ends, first end of second waveguide portion coupled to second end of laser source; micro-cavity coupled between second end of first waveguide portion and second end of second waveguide portion, micro-cavity having resonant frequency; and electronic locking loop coupled between micro-cavity and laser source, wherein electronic locking loop electronically locks laser source to resonant frequency of micro-cavity; wherein first waveguide portion is optical locking loop coupled between micro-cavity and laser source, wherein optical locking loop optically locks laser source to resonant frequency of micro-cavity; micro-cavity stabilization loop coupled with micro-cavity, wherein micro-cavity stabilization loop stabilizes resonant frequency of micro-cavity to reference frequency; and output for outputting light from system.
摘要翻译：激光稳定系统包括具有第一和第二端的激光源; 第一波导部分具有第一和第二端，第一波导部分的第一端耦合到激光源的第一端; 第二波导部分具有第一和第二端，第二波导部分的第一端耦合到激光源的第二端; 耦合在第一波导部分的第二端和第二波导部分的第二端之间的微腔，具有谐振频率的微腔; 和耦合在微腔和激光源之间的电子锁定环，其中电子锁定环将激光源电子地锁定到微腔的共振频率; 其中第一波导部分是耦合在微腔和激光源之间的光学锁定环，其中光学锁定环将激光源光学锁定到微腔的共振频率; 微腔稳定环与微腔耦合，其中微腔稳定环路将微腔的谐振频率稳定到参考频率; 并输出用于从系统输出光。

10. 发明授权

US08223341B2 System and method for enhancing signal-to-noise ratio of a resonator fiber optic gyroscope 有权
标题翻译：用于提高谐振器光纤陀螺仪的信噪比的系统和方法
公开(公告)号：US08223341B2
公开(公告)日：2012-07-17
申请号：US12789972
申请日：2010-05-28
申请人： Lee K. Strandjord , Glen A. Sanders , Tiequn Qiu
发明人： Lee K. Strandjord , Glen A. Sanders , Tiequn Qiu
IPC分类号： G01C19/72
CPC分类号： G01C19/727
摘要： A resonator fiber optic gyroscope includes a sensing resonator having a first resonance frequency for a first laser beam propagation direction and a second resonance frequency for a second laser beam propagation direction; an intensity modulator coupled to an output of the sensing resonator and configured to modulate the intensity of a signal output from the sensing resonator, wherein the intensity modulator modulates the output signal at an intensity modulation frequency; and resonance tracking electronics coupled to an output of the intensity modulator and configured to demodulate the intensity modulated signal output from the intensity modulator at a resonance tracking modulation frequency to produce a first demodulated signal; the resonance tracking electronics further configured to demodulate the first demodulated signal at the intensity modulation frequency, wherein the intensity modulation frequency is different from the resonance tracking modulation frequency.
摘要翻译：谐振器光纤陀螺仪包括：感测谐振器，具有用于第一激光束传播方向的第一谐振频率和用于第二激光束传播方向的第二谐振频率; 耦合到感测谐振器的输出并被配置为调制从感测谐振器输出的信号的强度的强度调制器，其中强度调制器以强度调制频率调制输出信号; 以及谐振跟踪电子器件耦合到所述强度调制器的输出并且被配置为以谐振跟踪调制频率解调从所述强度调制器输出的强度调制信号，以产生第一解调信号; 谐振跟踪电子器件还被配置为以强度调制频率解调第一解调信号，其中强度调制频率不同于谐振跟踪调制频率。

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