公开(公告)号：US09121708B1

公开(公告)日：2015-09-01

申请号：US14272842

申请日：2014-05-08

Applicant: Honeywell International Inc.

Inventor： Tiequn Qiu

IPC: G01C19/72

CPC classification number: G01C19/727 ,  G01C19/723

Abstract: A resonator fiber optic gyroscope (RFOG) is provided. The RFOG includes a fiber coil, first and second lasers, first and second phase modulators, and a common phase modulator. The first laser generates CW input light for propagation in the CW direction of the fiber coil. The second laser generates CCW input light for propagation in the CCW direction of the fiber coil. The first phase modulator modulates the CW input light with modulation frequency f1=(n+0.5)*FSR. The second phase modulator modulates the CCW input light with modulation frequency f2=(m+0.5)*FSR so that overlap of major sidebands is avoided. The phase modulation amplitudes of the first and second modulators substantially suppress the optical carrier components of the CW and CCW input light. The common phase modulator is configured to modulate the CW and CCW input light with a common phase modulation frequency and a common phase amplitude.

Abstract translation: 提供了一种谐振器光纤陀螺仪（RFOG）。 RFOG包括光纤线圈，第一和第二激光器，第一和第二相位调制器以及公共相位调制器。 第一激光器产生CW输入光以在光纤线圈的CW方向上传播。 第二激光器产生用于在光纤线圈的CCW方向上传播的CCW输入光。 第一相位调制器以调制频率f1 =（n + 0.5）* FSR调制CW输入光。 第二相调制器调制调制频率为f2 =（m + 0.5）* FSR的CCW输入光，从而避免了主要边带的重叠。 第一和第二调制器的相位调制幅度基本上抑制CW和CCW输入光的光载波分量。 公共相位调制器被配置为以公共相位调制频率和公共相位幅度来调制CW和CCW输入光。

公开(公告)号：US09001336B1

公开(公告)日：2015-04-07

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: G01C19/72 ,  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：US08947671B2

公开(公告)日：2015-02-03

申请号：US13774678

申请日：2013-02-22

Applicant: Honeywell International Inc.

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

IPC: G01C19/72

CPC classification number: G01C19/721 ,  G01C19/727

Abstract: A resonator fiber optic gyroscope (RFOG) is provided. The RFOG includes a gyroscope resonator having a clockwise input port and a counter-clockwise input port; a first laser configured to couple a clockwise optical beam into to the clockwise input port; a clockwise Pound-Drever-Hall modulation generator to modulate the clockwise optical beam with a resonance tracking modulation before the clockwise optical beam is coupled into the clockwise input port; bias correction electronics; FSR-detection-and-servo electronics including a switch communicatively coupled to the clockwise Pound-Drever-Hall modulation generator; a clockwise transmission detector configured to receive an optical beam output from the counter-clockwise input port and output signals to the bias correction electronics and the FSR-detection-and-servo electronics; and a second laser configured to couple a counter-clockwise optical beam into to the counter-clockwise input port, wherein the FSR of the gyroscope resonator is measured based on the Pound-Drever-Hall modulation of the clockwise optical beam.

Abstract translation: 提供了一种谐振器光纤陀螺仪（RFOG）。 RFOG包括具有顺时针输入端口和逆时针输入端口的陀螺仪谐振器; 配置成将顺时针光束耦合到顺时针输入端口的第一激光器; 在顺时针光束耦合到顺时针输入端口之前，使用谐振跟踪调制来调制顺时针光束的顺时针方向Drever-Hall调制发生器; 偏置校正电子; FSR检测和伺服电子器件包括通信地耦合到顺时针的Dound-Drever-Hall调制发生器的开关; 顺时针传输检测器，被配置为接收从逆时针输入端口输出的光束，并将信号输出到偏置校正电路和FSR检测与伺服电子设备; 以及配置成将逆时针光束耦合到逆时针输入端口的第二激光器，其中基于顺时针光束的磅德尔 - 霍尔调制来测量陀螺仪谐振器的FSR。

公开(公告)号：US20140152994A1

公开(公告)日：2014-06-05

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: G01C19/66 ,  H01S3/30

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; 以及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在第一方向上传播，其中所述多频光束针对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。