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公开(公告)号：US11624614B1
公开(公告)日：2023-04-11
申请号：US16984855
申请日：2020-08-04
Applicant: Honeywell International Inc.
Inventor： Lee K. Strandjord , Tiequn Qiu , Glen A. Sanders
Abstract: Systems and methods for reducing rotation sensing errors from laser source signal and modulation cross-talk are provided herein. An RFOG includes a fiber optic resonator; a first laser source that produces a first light wave at a first carrier frequency and a first cross-talked portion at a second carrier frequency wave for propagating in a first direction, wherein a second cross-talked portion propagates in a second direction that is opposite to the first direction; a second laser source that produces a second light wave for propagating in the second direction at a second carrier frequency, and having a third cross-talked portion that propagates in the first direction, a first modulator that modulates the first light wave by suppressing light at the first carrier frequency and the second cross-talked portion at the second carrier frequency, and photodetectors that generate signals from the modulated first light wave and the second light wave.
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公开(公告)号：US11002545B2
公开(公告)日：2021-05-11
申请号：US16546115
申请日：2019-08-20
Applicant: Honeywell International Inc.
Inventor： Lee K. Strandjord , Glen A. Sanders , Jianfeng Wu , Tiequn Qiu , Marc Smiciklas
IPC: G01C19/72
Abstract: Systems and methods for performing SHD switching for RFOGS are provided herein. A system includes a resonator in which light resonates; at least one laser source that produces first and second optical beams; heterodyne modulators that modulate the first and second optical beams at a heterodyne frequency plus a modulation frequency offset to produce multiple sideband optical beams, wherein the modulation frequency offset has a different sign for the first and second optical beams; a frequency switching controller that alternatingly switches the signs of the modulation frequency offset applied to the first and second optical beams, wherein the heterodyne modulation of the first and second optical beams are on average at the heterodyne frequency; at least one coupler that couples the sideband optical beams into the resonator; a feedback control that detects the sideband optical beams transmitted from the resonator and, in response, adjusts frequencies of the optical beams.
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公开(公告)号：US20210025709A1
公开(公告)日：2021-01-28
申请号：US16519768
申请日：2019-07-23
Applicant: Honeywell International Inc.
Inventor： Glen A. Sanders , Lee K. Strandjord , Tiequn Qiu , Marc Smiciklas , Norman Gerard Tarleton
IPC: G01C19/72
Abstract: 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：US10288429B2
公开(公告)日：2019-05-14
申请号：US15611742
申请日：2017-06-01
Applicant: Honeywell International Inc.
Inventor： Tiequn Qiu , Jianfeng Wu , Matthew Wade Puckett
Abstract: In one embodiment, a method is provided. The method comprises transmitting a first laser pump signal to an optical resonator; adjusting a frequency of the first laser pump signal; generating a first order Stokes signal from the first laser pump signal in an optical resonator; measuring a first beat signal frequency; ceasing transmission of the first laser pump signal to the optical resonator; transmitting a second laser pump signal to the optical resonator; adjusting a frequency of the second laser pump signal; generating a first order Stokes signal from the second laser pump signal in the optical resonator; and measuring a second beat signal frequency; ceasing transmission of the second laser pump signal to the optical resonator.
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公开(公告)号：US10281646B2
公开(公告)日：2019-05-07
申请号：US15591836
申请日：2017-05-10
Applicant: Honeywell International Inc.
Inventor： Matthew Wade Puckett , Jianfeng Wu , Mary Salit , Tiequn Qiu
Abstract: An acousto-optic waveguide device comprises a substrate comprising a first material having a first refractive index and a first acoustic velocity; a cladding layer over the substrate, the cladding layer comprising a second material having a second refractive index that is distinct from the first refractive index, the second material having a second acoustic velocity that is distinct from the first acoustic velocity; and an optical core surrounded by the cladding layer, the optical core comprising a third material having a third refractive index that is higher that the first refractive index and the second refractive index, the third material having a third acoustic velocity that is distinct from the first acoustic velocity and the second acoustic velocity. The cladding layer that surrounds the optical core has a thickness configured to substantially confine acoustic waves to the cladding layer when an optical signal propagates through the optical core.
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Patent Agency Ranking
36.发明授权公开(公告)号：US09267799B2
公开(公告)日：2016-02-23
申请号：US14187589
申请日：2014-02-24
Applicant: Honeywell International Inc.
Inventor： Tiequn Qiu , Waymon Ho
CPC classification number: G01C19/722 , G01C19/72 , G01C19/727 , G01C21/00 , G02F2/00
Abstract: A method of measuring beat frequency comprises modulating a first optical signal and a second optical signal, wherein the first modulated optical signal includes a first carrier frequency and a first plurality of sideband frequencies and the second modulated optical signal includes a second carrier frequency and a second plurality of sideband frequencies. The method also comprises combining a fraction of the first modulated optical signal with a fraction of the second modulated optical signal into a combined signal and determining a carrier beat frequency. The method further comprises selecting a frequency range from the combined signal; performing a fast Fourier transform (FFT) on an electrical signal representing the selected frequency range; tracking the carrier beat frequency based on the FFT; and outputting a rate signal based on the tracked carrier beat frequency, the rate signal indicating a rotation rate of the resonator fiber optic gyroscope.
Abstract translation: 测量拍频的方法包括调制第一光信号和第二光信号，其中第一调制光信号包括第一载波频率和第一多个边带频率，第二调制光信号包括第二载波频率和第二载波频率 多个边带频率。 该方法还包括将第一调制光信号的一部分与第二调制光信号的一部分组合成组合信号并确定载波搏动频率。 该方法还包括从组合信号中选择频率范围; 对表示所选择的频率范围的电信号执行快速傅里叶变换（FFT）; 基于FFT跟踪载波拍频; 以及基于跟踪的载波搏动频率输出速率信号，所述速率信号指示所述谐振器光纤陀螺仪的旋转速率。
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公开(公告)号：US20150369605A1
公开(公告)日：2015-12-24
申请号：US14312009
申请日：2014-06-23
Applicant: Honeywell International Inc.
Inventor： Lee K. Strandjord , Glen A. Sanders , Tiequn Qiu
IPC: G01C19/72
CPC classification number: G01C19/727 , G01C19/721
Abstract: A resonator fiber optic gyroscope comprises a master laser that emits a reference optical signal, a first slave laser that emits a clockwise optical signal, and a second slave laser that emits a counter-clockwise optical signal. A resonator ring cavity in optical communication with the first slave laser and second slave laser is configured to receive the optical signals from the slave lasers without receiving the reference optical signal. A reflected optical signal from the cavity is directed to a feedback laser stabilization loop for the master laser that includes a common modulation frequency scheme. A frequency of the optical signal from the master laser is indirectly locked onto a resonance frequency of the cavity with a fixed frequency offset, which is determined by a relative frequency between the optical signal of the first slave laser or the second slave laser, and the optical signal of the master laser.
Abstract translation: 谐振器光纤陀螺仪包括发射参考光信号的主激光器，发射顺时针光信号的第一从激光器和发射逆时针光信号的第二从激光器。 与第一从属激光器和第二从属激光器光学通信的谐振器环腔被配置为从副激光器接收光信号而不接收参考光信号。 来自空腔的反射光信号被引导到包括公共调制频率方案的主激光器的反馈激光器稳定环路。 来自主激光器的光信号的频率被间隔地锁定到具有固定频率偏移的空腔的谐振频率上，该固定频率偏移由第一从激光器或第二从激光器的光信号与第一从激光器之间的相对频率确定， 主激光器的光信号。
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38.发明授权Systems and methods for stabilized stimulated brillouin scattering lasers with ultra-low phase noise 有权具有超低相位噪声的稳定受激布里渊散射激光器的系统和方法公开(公告)号：US09197032B2
公开(公告)日：2015-11-24
申请号：US14243794
申请日：2014-04-02
Applicant: Honeywell International Inc.
Inventor： Tiequn Qiu , Jianfeng Wu , Glen A. Sanders
CPC classification number: H01S3/302 , G01C19/727 , H01S3/0085 , H01S3/06791 , H01S3/083 , H01S3/1053 , H01S3/1304 , H01S3/1305 , H01S3/30
Abstract: Systems and methods for stabilized stimulated Brillouin scattering lasers with ultra-low phase noise are provided. In one embodiment, a method for producing a Stimulated Brillouin Scattering (SBS) beam comprises: generating laser light from a tunable laser source; splitting the laser light into a first light beam and a second light beam; creating a phase modulated light beam by applying a phase modulation to the first light beam; locking a frequency of the laser light to a frequency of a ring cavity using the phase modulated light beam and a Pound-Drever-Hall servo loop coupled to the tunable laser source; coupling the second light beam into the ring cavity in a direction of travel opposite to that of the phase modulated light beam; generating a Stimulated Brillouin Scattering light beam in the ring cavity from the second light beam; and outputting the Stimulated Brillouin Scattering light beam.
Abstract translation: 提供了具有超低相位噪声的稳定受激布里渊散射激光器的系统和方法。 在一个实施例中，一种用于产生受激布里渊散射（SBS）光束的方法包括：从可调激光源产生激光; 将激光分为第一光束和第二光束; 通过对所述第一光束施加相位调制来产生相位调制光束; 使用相位调制光束将激光的频率锁定到环形腔的频率，以及耦合到可调谐激光源的磅Drever-Hall伺服环路; 将第二光束沿与相位调制光束相反的行进方向耦合到环形腔中; 从第二光束在环形空腔中产生受激的布里渊散射光束; 并输出受激布里渊散射光束。
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39.发明申请SYSTEMS AND METHODS FOR AN INTENSITY STABILIZED RESONATOR FIBER OPTIC GYROSCOPE 有权强度稳定型谐振器光纤陀螺仪的系统与方法公开(公告)号：US20150316382A1
公开(公告)日：2015-11-05
申请号：US14266356
申请日：2014-04-30
Applicant: Honeywell International Inc.
Inventor： Glen A. Sanders , Lee K. Strandjord , Jianfeng Wu , Tiequn Qiu
IPC: G01C19/72
CPC classification number: G01C19/727 , G01C19/721
Abstract: 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.
Abstract translation: 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：US08830478B2
公开(公告)日：2014-09-09
申请号：US13693321
申请日：2012-12-04
Applicant: Honeywell International Inc.
Inventor： Jianfeng Wu , Tiequn Qiu , Glen A. Sanders , Lee K. Strandjord
CPC classification number: H01S3/302 , G01C19/727 , H01S3/30
Abstract: Systems and methods for measuring rotation using an optical frequency comb stimulated Brillouin scattering gyroscope are provided. In certain embodiments, a system comprises a light source that produces a multiple-frequency light beam based on an optical frequency comb; and an optical fiber resonator coupled to the light source, the multiple-frequency light beam propagating in a first direction within the optical fiber resonator, wherein the multiple -frequency light beam generates stimulated Brillouin scattering (SBS) for a frequency, wherein the Brillouin scattering generates an SBS light beam to propagate in a second direction, the first direction being opposite in direction to the second direction. The system also comprises a servo to control the frequencies of the optical frequency comb to lock a plurality of component frequencies on resonance peaks of the optical fiber resonator; and a mixer that determines a frequency difference between the SBS light beam and the multiple-frequency light beam.
Abstract translation: 提供了使用光学频率梳状受激布里渊散射陀螺仪测量旋转的系统和方法。 在某些实施例中，系统包括基于光频梳产生多频光束的光源; 耦合到所述光源的光纤谐振器，所述多频光束在所述光纤谐振器内沿第一方向传播，其中所述多频光束为频率产生受激布里渊散射（SBS），其中所述布里渊散射 产生SBS光束沿第二方向传播，第一方向与第二方向相反。 该系统还包括伺服器，用于控制光频梳的频率以锁定光纤谐振器的共振峰上的多个分量频率; 以及确定SBS光束和多频光束之间的频率差的混合器。
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