公开(公告)号：US09441969B2

公开(公告)日：2016-09-13

申请号：US14094105

申请日：2013-12-02

Applicant: Honeywell International Inc.

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

IPC: G01C19/72 ,  G02B6/02 ,  G02B6/26

CPC classification number: G01C19/721 ,  G01C19/727 ,  G02B6/02042 ,  G02B6/262

Abstract: A multi-core transport system for a resonant fiber optic gyroscope is provided. The transport system has a transport fiber configured to transmit a clockwise signal and a counterclockwise signal, wherein the transport fiber has at least a first core and a second core. The first core and second core are configured such that when the first core imparts a first effect on the clockwise signal, the second core imparts a second effect on the counterclockwise signal, wherein the second effect substantially mirrors the first effect. The system further comprises a first coupler configured to optically couple the clockwise signal to the first core, and the counterclockwise signal to the second core; and a second coupler configured to optically couple the clockwise signal from the first core to a resonator, and the counterclockwise signal from the second core to the resonator.

Abstract translation: 提供了一种用于谐振光纤陀螺仪的多核传输系统。 传送系统具有被配置为传送顺时针信号和逆时针信号的传输光纤，其中传输光纤具有至少第一核心和第二核心。 第一芯和第二芯构造成使得当第一芯对顺时针信号施加第一效应时，第二芯对逆时针信号施加第二效应，其中第二效应基本上反映第一效应。 所述系统还包括：第一耦合器，被配置为将所述顺时针信号光学地耦合到所述第一芯，并且将所述逆时针信号耦合到所述第二芯; 以及第二耦合器，被配置为将来自第一芯的顺时针信号光学地耦合到谐振器，以及从第二芯到谐振器的逆时针信号。

公开(公告)号：US09395184B2

公开(公告)日：2016-07-19

申请号：US14461680

申请日：2014-08-18

Applicant: Honeywell International Inc.

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

IPC: G01C19/72 ,  G02B6/28

CPC classification number: G01C19/727 ,  G01C19/72 ,  G01C19/721 ,  G02B6/2843

Abstract: Systems and methods for a resonant fiber optic gyroscope with a polarizing crystal waveguide coupler are provided. In one embodiment, an optical fiber resonator comprises: a polarizing single crystal material having a first crystal lattice axis; a first waveguide formed in the crystal material; a second waveguide formed in the crystal material running parallel to the first waveguide; and an optical fiber sensing coil. The first waveguide comprises a bend that approaches the second waveguide defining a coupling region between the first and second waveguides. The first and second waveguides are polarized to guide light having a polarization state aligned to the first crystal lattice axis. The second waveguide and the sensing coil are coupled into a resonator configuration forming a ring resonator, the second waveguide comprising a first port coupled to a first end of the coil, and a second port coupled to a second end of the coil.

Abstract translation: 提供了一种具有偏振晶体波导耦合器的谐振光纤陀螺仪的系统和方法。 在一个实施例中，光纤谐振器包括：具有第一晶格轴的偏振单晶材料; 在晶体材料中形成的第一波导; 形成在与第一波导平行的晶体材料中的第二波导; 和光纤感测线圈。 第一波导包括接近限定第一和第二波导之间的耦合区域的第二波导的弯曲部。 第一和第二波导被极化以引导具有与第一晶格轴对准的偏振状态的光。 第二波导和感测线圈耦合到形成环形谐振器的谐振器配置中，第二波导包括耦合到线圈的第一端的第一端口和耦合到线圈的第二端的第二端口。

公开(公告)号：US20160047655A1

公开(公告)日：2016-02-18

申请号：US14461680

申请日：2014-08-18

Applicant: HONEYWELL INTERNATIONAL INC.

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

IPC: G01C19/72 ,  G02B6/28

CPC classification number: G01C19/727 ,  G01C19/72 ,  G01C19/721 ,  G02B6/2843

Abstract: Systems and methods for a resonant fiber optic gyroscope with a polarizing crystal waveguide coupler are provided. In one embodiment, an optical fiber resonator comprises: a polarizing single crystal material having a first crystal lattice axis; a first waveguide formed in the crystal material; a second waveguide formed in the crystal material running parallel to the first waveguide; and an optical fiber sensing coil. The first waveguide comprises a bend that approaches the second waveguide defining a coupling region between the first and second waveguides. The first and second waveguides are polarized to guide light having a polarization state aligned to the first crystal lattice axis. The second waveguide and the sensing coil are coupled into a resonator configuration forming a ring resonator, the second waveguide comprising a first port coupled to a first end of the coil, and a second port coupled to a second end of the coil.

Abstract translation: 提供了一种具有偏振晶体波导耦合器的谐振光纤陀螺仪的系统和方法。 在一个实施例中，光纤谐振器包括：具有第一晶格轴的偏振单晶材料; 在晶体材料中形成的第一波导; 形成在与第一波导平行的晶体材料中的第二波导; 和光纤感测线圈。 第一波导包括接近限定第一和第二波导之间的耦合区域的第二波导的弯曲部。 第一和第二波导被极化以引导具有与第一晶格轴对准的偏振状态的光。 第二波导和感测线圈耦合到形成环形谐振器的谐振器配置中，第二波导包括耦合到线圈的第一端的第一端口和耦合到线圈的第二端的第二端口。

公开(公告)号：US20150241218A1

公开(公告)日：2015-08-27

申请号：US14187589

申请日：2014-02-24

Applicant: Honeywell International Inc.

Inventor： Tiequn Qiu ,  Waymon Ho

IPC: G01C19/72 ,  G01C21/00

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。

公开(公告)号：US09097526B1

公开(公告)日：2015-08-04

申请号：US14158641

申请日：2014-01-17

Applicant: Honeywell International Inc.

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

IPC: G01C19/72 ,  G02F1/225 ,  G02F2/00

CPC classification number: G01C19/722 ,  G01C19/721 ,  G02F1/2252 ,  G02F2/00

Abstract: Systems and methods for a polarization matched resonator fiber optic gyroscope are provided. In one embodiment an RFOG comprises: a light source; a fiber optic ring resonator; a photodetector that outputs an electrical signal that varies as a function of optical intensity; and an input light polarization servo. A light beam from the servo is launched into the resonator ring in a first direction of circulation. The input polarization servo comprises a birefringence modulator that modulates a phase shift between two components of an input polarization state of the light beam at ωm, the modulator is controlled to drive towards zero a 1st harmonic of ωm as measured in the electrical signal. The servo further comprises a tunable ½ waveplate that adjusts an amplitude of the two components of the input polarization state relative to each other. The tunable ½ waveplate is controlled to maximize a peak optical intensity as measured in the electrical signal.

Abstract translation: 提供了一种用于偏振匹配谐振器光纤陀螺仪的系统和方法。 在一个实施例中，RFOG包括：光源; 光纤环谐振器; 输出根据光强度变化的电信号的光电检测器; 和输入光偏振伺服。 来自伺服器的光束沿着第一循环方向发射到谐振器环中。 输入偏振伺服包括双折射调制器，其在ωm处调制光束的输入偏振状态的两个分量之间的相移，调制器被控制为在电信号中测得的ωm的第一谐波为零。 伺服还包括可调谐的1/2波片，其调节输入偏振状态的两个分量相对于彼此的振幅。 可调谐的1/2波片被控制以使在电信号中测得的峰值光强度最大化。

公开(公告)号：US09041934B2

公开(公告)日：2015-05-26

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。

公开(公告)号：US20150098088A1

公开(公告)日：2015-04-09

申请号：US14047855

申请日：2013-10-07

Applicant: Honeywell International Inc.

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

IPC: G01C19/66

CPC classification number: G01C19/661 ,  G01C19/727

Abstract: A resonator fiber optic gyroscope is provided. The resonator fiber optic gyroscope includes a gyroscope resonator, a laser; a clockwise modulator; a clockwise circulator; a clockwise reflection detector; a first-lock-in-amplifier, a clockwise-resonance-tracking servo to receive output from the first-lock-in-amplifier and to provide feedback to the laser to lock the laser to the gyroscope resonator; a clockwise transmission detector to detect an optical beam output from the counter-clockwise input port; a second servo; a second-lock-in-amplifier; and a third-lock-in-amplifier. The first and second lock-in-amplifiers demodulate at the first harmonic of the modulation frequency. The second-lock-in-amplifier demodulates at the second harmonic of the modulation frequency. Either the modulation frequency of the clockwise optical beam is locked to (n+0.5) times the FSR through the second servo, where n is zero or a positive integer, or the FSR is locked to 1/(n+0.5) times the modulation frequency of the clockwise optical beam through the second servo.

Abstract translation: 提供了一种谐振器光纤陀螺仪。 谐振器光纤陀螺仪包括陀螺仪谐振器，激光器; 顺时针调制器 顺时针循环器 顺时针反射检测器; 第一锁定放大器，顺时针谐振跟踪伺服器，用于接收来自第一锁定放大器的输出，并向激光器提供反馈以将激光器锁定到陀螺仪谐振器; 用于检测从逆时针输入端口输出的光束的顺时针传输检测器; 第二伺服; 第二锁定放大器; 和第三锁定放大器。 第一和第二锁相放大器在调制频率的一次谐波处解调。 第二锁定放大器在调制频率的二次谐波处解调。 顺时针光束的调制频率通过第二伺服锁定到FSR的（n + 0.5）倍，其中n为零或正整数，或者FSR被锁定到调制的1 /（n + 0.5）倍 顺时针光束通过第二伺服的频率。

公开(公告)号：US20150015892A1

公开(公告)日：2015-01-15

申请号：US13937956

申请日：2013-07-09

Applicant: Honeywell International Inc.

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

IPC: G01C19/72

CPC classification number: G01C19/727 ,  G01C19/72 ,  G02B6/02233 ,  G02B6/29376

Abstract: One embodiment is directed towards a resonator fiber optic gyroscope (RFOG) including a resonator, one or more light sources coupled to the resonator, and resonance tracking electronics coupled to the resonator. The one or more light sources are configured to produce at least two light beams for input into the fiber coil, the at least two light beams including a first light beam at a first frequency and a second light beam at a second frequency, the first and second frequencies locked to nearby resonance modes of the resonator. The resonance tracking electronics are configured to process output light from the resonator and generate a signal therefrom, the signal indicative of a rotation rate of the resonator. The fiber coil has approximately zero total accumulated chromatic dispersion at the first frequency and the second frequency of the first light beam and the second light beam.

Abstract translation: 一个实施例涉及包括谐振器，耦合到谐振器的一个或多个光源以及耦合到谐振器的谐振跟踪电路的谐振器光纤陀螺仪（RFOG）。 一个或多个光源被配置为产生用于输入到光纤线圈中的至少两个光束，所述至少两个光束包括第一频率的第一光束和第二频率的第二光束，第一和第二光束 第二频率被锁定到谐振器的附近谐振模式。 共振跟踪电子设备被配置为处理来自谐振器的输出光并从其产生信号，该信号指示谐振器的转速。 光纤线圈在第一频率和第一光束和第二光束的第二频率处具有近似零的总累积色散。

公开(公告)号：US20140198317A1

公开(公告)日：2014-07-17

申请号：US13740231

申请日：2013-01-13

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Tiequn Qiu ,  Steven J. Sanders

IPC: H01S5/30 ,  G01C19/72 ,  H01L33/60

CPC classification number: H01S5/30 ,  G01C19/72 ,  H01L33/60 ,  H01S3/10061 ,  H01S3/1067 ,  H01S5/02216 ,  H01S5/02284 ,  H01S5/141 ,  H01S5/148

Abstract: A laser apparatus comprises a pump laser device, and a polarizing optical fiber having a proximal end and a distal end, with the polarizing optical fiber coupled to the pump laser device at the proximal end. At least one output reflector is written on the polarizing optical fiber toward the distal end. Only one polarization mode is supported when a laser beam is transmitted through the polarizing optical fiber from the pump laser device.

Abstract translation: 激光装置包括泵激光器件和具有近端和远端的偏振光纤，偏振光纤在近端与泵激光器件耦合。 至少一个输出反射器朝向远端写入偏振光纤上。 当激光束通过来自泵激光器件的偏振光纤传输时，仅支持一种偏振模式。

公开(公告)号：US20250027772A1

公开(公告)日：2025-01-23

申请号：US18356768

申请日：2023-07-21

Applicant: Honeywell International Inc.

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

IPC: G01C19/72

Abstract: Embodiments utilize an optical frequency comb generator coupled to an optical resonator of an optical gyroscope. The optical frequency comb generator generates an optical frequency comb having frequency peaks that each correspond to a respective resonance frequency of the optical resonator. A control servo can be coupled to the optical frequency comb generator and controls the optical frequency comb output from the optical frequency comb generator. In doing so, the optical frequency comb remains tuned to the resonance frequencies of the optical resonator during gyroscope operation.