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.

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.

公开(公告)号：US20210025708A1

公开(公告)日：2021-01-28

申请号：US16734038

申请日：2020-01-03

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Marc Smiciklas ,  Jianfeng Wu ,  Glen A. Sanders

IPC: G01C19/66 ,  H01S3/08 ,  H01S3/23 ,  H01S3/13

Abstract: Systems and methods for performing resonator fiber optic gyroscope (RFOG) resonance hopping are described herein. For example, an RFOG includes a fiber optic resonator. The RFOG also includes a plurality of laser sources that each launch a respective laser for propagation within the fiber optic resonator. Further, the RFOG includes a threshold detector that determines when the operation of at least one laser source in the plurality of laser sources exceeds a threshold associated with the operational range of an aspect of the at least one laser source. Additionally, the RFOG includes a hop control logic that adjusts the frequency of at least one laser produced by the at least one laser source one or more resonant modes of the fiber optic resonator such that the aspect of the at least one laser moves away from the threshold towards a nominal value within the operational range.

公开(公告)号：US20190212148A1

公开(公告)日：2019-07-11

申请号：US15952971

申请日：2018-04-13

Applicant: Honeywell International Inc.

Inventor： Glen A. Sanders ,  Clarence Eugene Laskoskie ,  Chellappan Narayanan ,  Lee K. Strandjord

IPC: G01C19/72

Abstract: An optical resonator is provided. The optical resonator comprises: an optical resonator coil comprising a first port and a second port; wherein the optical resonator coil comprises antiresonant nodeless fiber; a resonator loop closure optics system; and wherein the antiresonant nodeless fiber has a length such that the resonant frequencies the optical resonator of the desired polarization state of light and of the undesired polarization state of light are separated by between a tenth of a free spectral range and nine tenths of a free spectral range to minimize gyroscope errors.

公开(公告)号：US20190049312A1

公开(公告)日：2019-02-14

申请号：US15877985

申请日：2018-01-23

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Glen A. Sanders ,  Mitchell Novack

IPC: G01J9/02 ,  G01P15/093 ,  G01S17/36 ,  G01B11/14 ,  G01V1/22

Abstract: An interferometer including a master laser, a slave laser and optical elements is provided. The optical elements direct and combine a master laser beam and a slave laser beam into a sensing phase measurement loop to provide a sensing beat signal and a reference phase lock loop to provide a reference beat signal. An electronic circuit portion is coupled to receive the sensing and reference beat signals. The electronic circuit portion includes a clock, at least one numerically controlled oscillator, at least one mixer and an interferometer output. The at least one numerically controlled oscillator has a clock input coupled to the clock. The at least one mixer has a first input to receive the sensing beat signal and a second input to receive an output of the at least one numerically controlled oscillator. The interferometer output is coupled to receive an output of the at least one mixer.

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。

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。

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

IPC: G01C19/72 ,  H01S3/00 ,  H01S3/30 ,  G01C19/66

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。

公开(公告)号：US08699034B2

公开(公告)日：2014-04-15

申请号：US13655687

申请日：2012-10-19

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Glen A. Sanders ,  Norman Gerard Tarleton

IPC: G01C19/72

CPC classification number: G01C19/727

Abstract: 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 is provided. The controller includes an intensity modulator optically coupled to receive a light beam from a laser source modulated at a resonance detection modulation frequency, and an optical tap device optically coupled to the intensity modulator. The controller also includes 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.

Abstract translation: 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，提供了具有残余强度调制（RIM）控制器的谐振光纤陀螺仪（RFOG）。 控制器包括光耦合以接收来自以谐振检测调制频率调制的激光源的光束的强度调制器和与该强度调制器光学耦合的光学抽头装置。 控制器还包括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。

公开(公告)号：US20250052575A1

公开(公告)日：2025-02-13

申请号：US18662707

申请日：2024-05-13

Applicant: Honeywell International Inc.

Inventor： Glen A. Sanders ,  Marc Smiciklas ,  Lee K. Strandjord

IPC: G01C19/72

Abstract: An RFOG includes a resonator and an optical signal source configured to produce optical signals. Further, the RFOG includes optical components that introduce a first and second optical signals derived from the optical signals for propagation within the resonator wherein the first and second optical signals propagate in opposite directions. Additionally, the RFOG includes serrodyne modulation electronics that generate a serrodyne modulation control signal, wherein a first and second serrodyne modulation signal are generated from the serrodyne modulation control signal, wherein a sign of a slope of the first serrodyne modulation signal is opposite a sign of a slope of the second serrodyne modulation signal, wherein the signs of the slopes of the first and second serrodyne modulation signals periodically switch. Moreover, the RFOG includes phase modulators that respectively phase modulate the first and second optical signals with the first and second serrodyne modulation signals before propagating in the resonator.