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    CLOSED LOOP OPERATION OF BROADBAND RESONATOR OPTICAL GYROSCOPE USING SAWTOOTH PHASE MODULATIONS
    1.
    发明申请
    CLOSED LOOP OPERATION OF BROADBAND RESONATOR OPTICAL GYROSCOPE USING SAWTOOTH PHASE MODULATIONS 有权

    公开(公告)号：US20240426610A1

    公开(公告)日：2024-12-26

    申请号：US18341281

    申请日：2023-06-26

    Applicant: Honeywell International Inc.

    Inventor： Tiequn Qiu ,  Jianfeng Wu ,  Matthew Wade Puckett ,  Steven Tin ,  Glen A. Sanders

    IPC: G01C19/72 ,  G02F1/01

    Abstract: Various examples of a closed-loop optical gyroscope are disclosed. The closed-loop optical gyroscope includes a broadband light source configured to generate broadband optical signal(s). The broadband optical signal(s) propagate in an optical resonator and are coupled in and out of the optical resonator by optical couplers. A phase modulator applies phase modulation to the optical signal(s) based on a sawtooth modulation signal. The optical signal(s) repropagate in the optical resonator in a different direction. The optical signal(s) are then received and analyzed to determine parameter(s) of the phase modulator. One or more processors configure the phase modulator based on the determined parameter(s).

    SYSTEMS AND METHODS FOR REDUCING POLARIZATION-RELATED BIAS ERRORS IN RFOGS
    5.
    发明申请
    SYSTEMS AND METHODS FOR REDUCING POLARIZATION-RELATED BIAS ERRORS IN RFOGS 审中-公开

    公开(公告)号：US20190041215A1

    公开(公告)日：2019-02-07

    申请号：US15668676

    申请日：2017-08-03

    Applicant: Honeywell International Inc.

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

    IPC: G01C19/72 ,  G02B6/02

    CPC classification number: G01C19/727 ,  G01C19/722 ,  G01C19/726 ,  G02B6/02328 ,  G02B6/02361 ,  G02F2203/15

    Abstract: 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.

    Laser with transmission and reflection mode feedback control
    7.
    发明授权
    Laser with transmission and reflection mode feedback control 有权
    激光带传输和反射模式反馈控制

    公开(公告)号：US09537283B2

    公开(公告)日：2017-01-03

    申请号：US14546862

    申请日：2014-11-18

    Applicant: Honeywell International Inc.

    Inventor： Lee K. Strandjord ,  Tiequn Qiu ,  Glen A. Sanders

    IPC: H01S3/13 ,  H01S3/10 ,  G01C19/72 ,  H01S3/23 ,  H01S3/00

    CPC classification number: H01S3/1305 ,  G01C19/727 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/10092 ,  H01S3/1303 ,  H01S3/1304 ,  H01S3/1307 ,  H01S3/2383 ,  H01S2301/02

    Abstract: 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.

    Abstract translation: 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。

    Systems and methods for providing intensity stabilization for a resonator fiber optic gyroscope
    8.
    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

    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。

    DISPERSION MANAGED INTERFEROMETRIC FIBER OPTIC GYROSCOPE
    9.
    发明申请
    DISPERSION MANAGED INTERFEROMETRIC FIBER OPTIC GYROSCOPE 有权
    分布管理干涉光纤光学陀螺仪

    公开(公告)号：US20150116722A1

    公开(公告)日：2015-04-30

    申请号：US14063456

    申请日：2013-10-25

    Applicant: Honeywell International Inc.

    Inventor： Tiequn Qiu ,  Steven J. Sanders ,  Clarence Eugene Laskoskie

    IPC: G01C19/72

    CPC classification number: G01C19/72 ,  G01C19/721

    Abstract: 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.

    Abstract translation: 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。

    Broadband fiber light source with high wavelength stability under radiation for IFOG applications
    10.
    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

    Applicant: Honeywell International Inc.

    Inventor： Tiequn Qiu ,  Steven J. Sanders

    IPC: G01C19/72 ,  H01S3/067

    CPC classification number: H01S3/067 ,  G01C19/721 ,  H01S3/0014 ,  H01S3/06704 ,  H01S3/06795 ,  H01S3/094003 ,  H01S3/094023 ,  H01S3/094049 ,  H01S3/094053 ,  H01S3/1301 ,  H01S3/1305

    Abstract: 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.

    Abstract translation: 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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