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公开(公告)号：US12105327B2
公开(公告)日：2024-10-01
申请号：US18061695
申请日：2022-12-05
发明人： Jianfeng Wu , Matthew Wade Puckett , Steven Tin , Tiequn Qiu
CPC分类号： G02B6/3596 , G01C19/24 , G02B6/29338
摘要： Techniques are provided for implementing and using a travelling wave resonator, comprising planar optical waveguide including at least two stacked cores, to diminish Kerr effect in the travelling wave resonator. The travelling wave resonator may be used in a resonator optical gyroscope.
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公开(公告)号：US10914587B1
公开(公告)日：2021-02-09
申请号：US16519768
申请日：2019-07-23
IPC分类号： G01C19/72
摘要： Techniques are provided for correcting for time varying changes to a gyroscope incorporating a resonator and/or to an environment in which the gyroscope is located, and which affect the resonator. Free spectral range of the gyroscope, which varies with such changes, is determined and is used to correct at least one of gyroscope bias and scale factor.
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公开(公告)号：US10415971B2
公开(公告)日：2019-09-17
申请号：US15871709
申请日：2018-01-15
发明人： Neil Krueger , Mary Salit , Barbara Vizenor , Glen A. Sanders , Lee K. Strandjord , Tiequn Qiu
摘要： Bias error in a resonant fiber optic gyroscope (RFOG) is diminished by reducing polarization mismatch between a polarization Eigenstate of optical signals propagating inside of a resonator of the RFOG and the polarization of optical signals being injected into the resonator of the RFOG. The polarization mismatch is reduced by filtering the optical signals circulating in the resonator and the optical signals injected into the resonator with common polarizers.
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公开(公告)号：US20190041215A1
公开(公告)日：2019-02-07
申请号：US15668676
申请日：2017-08-03
发明人： Glen A. Sanders , Marc Smiciklas , Tiequn Qiu , Jianfeng Wu , Lee K. Strandjord
CPC分类号： G01C19/727 , G01C19/722 , G01C19/726 , G02B6/02328 , G02B6/02361 , G02F2203/15
摘要： Systems and methods for reducing polarization-related bias errors in RFOGS are described herein. In certain implementations, an RFOG system includes a fiber optic resonator, one or more laser sources, wherein light from the laser sources launches first and second optical beams into the fiber optic resonator in opposite directions, and an electro-optically tunable devices in the resonator path configured to modulate the phase difference between polarization components in the first and second optical beams as the optical beams propagate within the fiber optic resonator. The system further includes at least one photodetector, wherein the polarization components of the first and second optical beams are incident on the photodetector, wherein the at least one photodetector provides an electrical signal, and at least one processing unit configured to receive the electrical signal and calculate a rotation rate for the RFOG and provide a drive signal for the electro-optically tunable device.
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公开(公告)号：US10094664B2
公开(公告)日：2018-10-09
申请号：US15360875
申请日：2016-11-23
发明人： Glen A. Sanders , Lee K. Strandjord , Tiequn Qiu
IPC分类号： G01C19/72
摘要： In one embodiment, a method is provided. The method comprises generating a waveform; measuring signals representative of angular rotation rate in a linear region of the waveform; and diminishing bias error about at least one of a waveform's maxima and minima.
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公开(公告)号：US09537283B2
公开(公告)日：2017-01-03
申请号：US14546862
申请日：2014-11-18
发明人： Lee K. Strandjord , Tiequn Qiu , Glen A. Sanders
CPC分类号： H01S3/1305 , G01C19/727 , H01S3/005 , H01S3/0085 , H01S3/10092 , H01S3/1303 , H01S3/1304 , H01S3/1307 , H01S3/2383 , H01S2301/02
摘要： One embodiment is directed towards a stabilized laser including a laser to produce light at a frequency and a resonator coupled to the laser such that the light from the laser circulates therethrough. The laser also includes Pound-Drever-Hall (PDH) feedback electronics configured to adjust the frequency of the light from the laser to reduce phase noise in response to light sensed at the reflection port of the resonator and transmission port feedback electronics configured to adjust the frequency of the light from the laser toward resonance of the resonator at the transmission port in response to the light sensed at the transmission port of the resonator, wherein the transmission port feedback electronics adjust the frequency at a rate at least ten times slower than the PDH feedback electronics.
摘要翻译： 一个实施例涉及包括激光器的稳定激光器，以产生频率耦合的激光器和耦合到激光器的谐振器，使得来自激光器的光线通过其中循环。 激光器还包括Pound-Drever-Hall（PDH）反馈电子器件，其被配置为调节来自激光器的光的频率，以响应于在谐振器的反射端口处感测到的光而减少相位噪声，并且配置为调整 响应于在谐振器的传输端口处感测到的光，从激光器到发射端口的谐振器的谐振的频率，其中传输端口反馈电子器件以比PDH慢至少十倍的速率调节频率 反馈电子。
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7.发明授权Systems and methods for providing intensity stabilization for a resonator fiber optic gyroscope 有权用于为谐振器光纤陀螺仪提供强度稳定的系统和方法公开(公告)号：US09354063B2
公开(公告)日：2016-05-31
申请号：US14266356
申请日：2014-04-30
发明人： Glen A. Sanders , Lee K. Strandjord , Jianfeng Wu , Tiequn Qiu
IPC分类号： G01C19/72
CPC分类号： G01C19/727 , G01C19/721
摘要： Systems and methods for an intensity stabilized resonator fiber optic gyroscope are provided. In one embodiment, a method for providing optical intensity stabilization system for a resonator fiber optic gyroscope (RFOG) is provided. The method comprises: injecting a phase modulated light beam into a fiber optic ring resonator coil; measuring a DC component of the phase modulated light beam at an output of the fiber optic ring resonator coil; generating a feedback control signal based on the DC component; and attenuating the phase modulated light beam prior to injection into the fiber optic ring resonator coil by controlling a variable optical attenuator with the feedback control signal.
摘要翻译： 提供了用于强度稳定的谐振器光纤陀螺仪的系统和方法。 在一个实施例中，提供了一种用于提供用于谐振器光纤陀螺仪（RFOG）的光强度稳定系统的方法。 该方法包括：将相位调制光束注入到光纤环形谐振器线圈中; 在光纤环形谐振器线圈的输出处测量相位调制光束的直流分量; 基于DC分量产生反馈控制信号; 以及通过利用所述反馈控制信号控制可变光衰减器，在将所述相位调制光束注入所述光纤环形谐振器线圈之前衰减。
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公开(公告)号：US20150116722A1
公开(公告)日：2015-04-30
申请号：US14063456
申请日：2013-10-25
IPC分类号： G01C19/72
CPC分类号： G01C19/72 , G01C19/721
摘要： A dispersion managed interferometric fiber optic gyroscope comprising: a coupler coupled to the broadband light source via a first input fiber; an IOC comprising: a beamsplitter that directs the input signal to a first output and a second output; a combiner configured to combine a first return signal from the first output and a second return signal from the second output into a combined return signal; an integrated optical circuit input coupled to the coupler via a second input fiber; a fiber optic gyroscope sensing coil coupled to a first pigtail fiber and second pigtail fiber, the sensing coil comprising sensing fibers, wherein at least one dispersion slope of at least one of the first input fiber, second input fiber, first pigtail fiber, second pigtail fiber, and the sensing fibers is selected such that the signals at the IOC input has a second order coherence substantially equal to two.
摘要翻译： 一种色散管理干涉光纤陀螺仪，包括：经由第一输入光纤耦合到所述宽带光源的耦合器; IOC包括：分束器，其将输入信号引导到第一输出和第二输出; 组合器，其被配置为将来自第一输出的第一返回信号和来自第二输出的第二返回信号组合成组合返回信号; 经由第二输入光纤耦合到耦合器的集成光电路输入; 耦合到第一尾纤光纤和第二尾纤光纤的光纤陀螺仪感测线圈，所述感测线圈包括感测光纤，其中所述第一输入光纤，第二输入光纤，第一引出光纤，第二引出线中的至少一个的至少一个色散斜率 光纤，并且选择感测光纤使得IOC输入端的信号具有基本等于2的二阶相干性。
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9.发明授权Broadband fiber light source with high wavelength stability under radiation for IFOG applications 有权用于IFOG应用的辐射下具有高波长稳定性的宽带光纤光源公开(公告)号：US08941838B2
公开(公告)日：2015-01-27
申请号：US13714595
申请日：2012-12-14
发明人： Tiequn Qiu , Steven J. Sanders
CPC分类号： H01S3/067 , G01C19/721 , H01S3/0014 , H01S3/06704 , H01S3/06795 , H01S3/094003 , H01S3/094023 , H01S3/094049 , H01S3/094053 , H01S3/1301 , H01S3/1305
摘要： A rare-earth-doped-fiber light source with wavelength stability includes a rare-earth doped fiber and an undoped fiber placed in proximity to each other and having the same host material and the same cross-sectional structure, a coupler configured to direct a first portion of pump power from a pump laser to the undoped fiber so the first portion of pump power was twice passed through the coupler; and a wavelength division multiplexer configured to input a second portion of pump power from the pump laser to the rare-earth doped fiber. The rare-earth doped fiber is an active medium for the broadband light source and includes a fiber core doped with rare-earth ions. The undoped fiber includes a rare-earth-dopant-free fiber core. The length of the undoped fiber is one of the same as that of the doped fiber or optimized to match a radiation sensitivity of the doped fiber.
摘要翻译： 具有波长稳定性的稀土掺杂光纤光源包括稀土掺杂光纤和未掺杂的光纤，它们彼此靠近并且具有相同的主体材料和相同的横截面结构，耦合器被配置为引导 来自泵浦激光器的泵浦功率的第一部分到未掺杂的光纤，使得泵浦功率的第一部分两次通过耦合器; 以及波分多路复用器，其被配置为将来自所述泵浦激光器的泵浦功率的第二部分输入到所述稀土掺杂光纤。 稀土掺杂光纤是宽带光源的有源介质，包括掺杂有稀土离子的光纤芯。 未掺杂的纤维包括无稀土掺杂剂的纤维芯。 未掺杂光纤的长度与掺杂光纤的长度相同，或者被优化以匹配掺杂光纤的辐射灵敏度。
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公开(公告)号：US20140211211A1
公开(公告)日：2014-07-31
申请号：US13751833
申请日：2013-01-28
发明人： Tiequn Qiu , Lee K. Strandjord , Glen A. Sanders , Mary K. Salit
IPC分类号： G01C19/72
CPC分类号： G01C19/727 , G01C19/723
摘要： In one embodiment a system including a resonator fiber-optic gyroscope configured to measure rotation rate is provided. The resonator fiber-optic gyroscope includes a sensing resonator have a first resonance frequency for a first laser beam propagation direction and a second resonance frequency for a second laser beam propagation direction, an optical mixer coupled to an output of the sensing resonator and configured to mix an output of the sensing resonator with a reference laser, wherein the optical mixer outputs a beat signal, and a resonance tracking electronics coupled to the optical mixer. The resonance tracking electronics are configured to demodulate the beat signal at a frequency offset to produce first in-phase and quadrature demodulated information, generate R-squared information from a sum of squares of the first in-phase and quadrature demodulated information, and demodulate the R-squared information at a resonance tracking modulation frequency.
摘要翻译： 在一个实施例中，提供了一种包括被配置为测量旋转速率的谐振器光纤陀螺仪的系统。 谐振器光纤陀螺仪包括感测谐振器，其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混合的光学混合器 具有参考激光器的感测谐振器的输出，其中所述光学混合器输出拍频信号，以及耦合到所述光学混合器的谐振跟踪电子装置。 共振跟踪电子设备被配置为以频率偏移解调拍频信号以产生第一同相和正交解调信息，从第一同相和正交解调信息的平方和产生R平方信息，并且解调 谐振跟踪调制频率下的R平方信息。
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