公开(公告)号：US20160204571A1

公开(公告)日：2016-07-14

申请号：US14680331

申请日：2015-04-07

Applicant: Honeywell International Inc.

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

IPC: H01S3/30 ,  G01C19/66

CPC classification number: H01S3/302 ,  G01C19/66 ,  G01C19/72

Abstract: Systems and methods for an optical frequency comb stimulated Brillouin scattering gyroscope with a rigid optical waveguide resonator are provided. In one embodiment, a system comprises: a light source that produces an optical frequency comb comprising a multiple-frequency light field; a rigid optical waveguide resonator coupled to the light source, wherein a recirculating optical frequency comb produced from the optical frequency comb propagates in a first direction around the rigid optical waveguide resonator and generates within the rigid optical waveguide a SBS light field comprising at least one SBS frequency component, and wherein one or more optical frequency components of the recirculating optical frequency comb are locked on resonance peaks of the rigid optical waveguide resonator; and an optical mixer configured to produce an optical beat signal that varies as a function of a frequency difference between the stimulated Brillouin scattering light field and the recirculating optical frequency comb.

Abstract translation: 提供了具有刚性光波导谐振器的光学频率梳状受激布里渊散射陀螺仪的系统和方法。 在一个实施例中，系统包括：产生包括多频光场的光频梳的光源; 耦合到所述光源的刚性光波导谐振器，其中由所述光频梳产生的再循环光频梳在所述刚性光波导谐振器周围沿第一方向传播，并且在所述刚性光波导内产生包括至少一个SBS的SBS光场 频率分量，并且其中所述再循环光频梳的一个或多个光频分量锁定在所述刚性光波导谐振器的共振峰上; 以及配置成产生根据被激发的布里渊散射光场和再循环光频梳之间的频率差而变化的光学差拍信号的光学混合器。

公开(公告)号：US20150369606A1

公开(公告)日：2015-12-24

申请号：US14526300

申请日：2014-10-28

Applicant: Honeywell International Inc.

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

IPC: G01C19/72

CPC classification number: G01C19/727

Abstract: Systems and methods for a small low cost resonator fiber optic gyroscope (RFOG) with reduced optical errors are provided. In one embodiment, a RFOG comprises: a light source; an optical chip configured to couple a clockwise optical signal and a counterclockwise optical signal from the light source into a fiber optic resonator and couple the clockwise optical signal and the counterclockwise optical signal from the fiber optic resonator to at least one photodetector. The fiber optic resonator comprises a fiber optic coil having a first end point and a second end point. The fiber optic coil has a 90-degree splice located substantially half-way between the first end point and the second end point, is wrapped around a first fiber stretcher located between the first end point and the 90-degree splice, and is wrapped around a second fiber stretcher that is located between the second end point and the 90-degree splice.

Abstract translation: 提供了具有减少的光学误差的小型低成本谐振器光纤陀螺仪（RFOG）的系统和方法。 在一个实施例中，RFOG包括：光源; 光学芯片被配置为将来自光源的顺时针光信号和逆时针光信号耦合到光纤谐振器中，并将来自光纤谐振器的顺时针光信号和逆时针光信号耦合到至少一个光电检测器。 光纤谐振器包括具有第一端点和第二端点的光纤线圈。 光纤线圈具有基本上在第一端点和第二端点之间的中间位置的90度接头，围绕位于第一端点和90度接头之间的第一纤维拉伸器缠绕，并被包裹 位于第二端点和90度接头之间的第二纤维拉伸机。

公开(公告)号：US20150288135A1

公开(公告)日：2015-10-08

申请号：US14243794

申请日：2014-04-02

Applicant: Honeywell International Inc.

Inventor： Tiequn Qiu ,  Jianfeng Wu ,  Glen A. Sanders

IPC: H01S3/30 ,  H01S3/067

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。

公开(公告)号：US20150070707A1

公开(公告)日：2015-03-12

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 ,  G01C19/72

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。

公开(公告)号：US08830479B2

公开(公告)日：2014-09-09

申请号：US13751833

申请日：2013-01-28

Applicant: Honeywell International Inc.

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

IPC: G01C19/72

CPC classification number: G01C19/727 ,  G01C19/723

Abstract: In one embodiment a system including a resonator fiber-optic gyroscope configured to measure rotation rate is provided. The resonator fiber-optic gyroscope includes a sensing resonator have a first resonance frequency for a first laser beam propagation direction and a second resonance frequency for a second laser beam propagation direction, an optical mixer coupled to an output of the sensing resonator and configured to mix an output of the sensing resonator with a reference laser, wherein the optical mixer outputs a beat signal, and a resonance tracking electronics coupled to the optical mixer. The resonance tracking electronics are configured to demodulate the beat signal at a frequency offset to produce first in-phase and quadrature demodulated information, generate R-squared information from a sum of squares of the first in-phase and quadrature demodulated information, and demodulate the R-squared information at a resonance tracking modulation frequency.

Abstract translation: 在一个实施例中，提供了一种包括被配置为测量旋转速率的谐振器光纤陀螺仪的系统。 谐振器光纤陀螺仪包括感测谐振器，其具有用于第一激光束传播方向的第一谐振频率和用于第二激光束传播方向的第二谐振频率，耦合到感测谐振器的输出并被配置为混合的光学混合器 具有参考激光器的感测谐振器的输出，其中所述光学混合器输出拍频信号，以及耦合到所述光学混合器的谐振跟踪电子装置。 谐振跟踪电子设备被配置为以频率偏移解调拍频信号以产生第一同相和正交解调信息，从第一同相和正交解调信息的平方和产生R平方信息，并且解调 谐振跟踪调制频率下的R平方信息。

公开(公告)号：US20140240712A1

公开(公告)日：2014-08-28

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：US20250102302A1

公开(公告)日：2025-03-27

申请号：US18475503

申请日：2023-09-27

Applicant: Honeywell International Inc.

Inventor： Matthew Wade Puckett ,  Jianfeng Wu ,  Tiequn Qiu ,  Steven Tin

IPC: G01C19/72 ,  G02B6/26

Abstract: A directional coupler with reduced phase deviation is provided. The directional coupler includes a first coupler waveguide and second coupler waveguide. At least one of a spaced distance between the first coupler waveguide and the second coupler waveguide and a length of the first coupler waveguide and the second coupler waveguide selected to achieve an acceptable phase deviation and a set coupling ratio. The phase deviation is caused by a difference in loss coefficients between a first optical mode in the first coupler waveguide and a second optical mode in the second coupler waveguide.

公开(公告)号：US20250093158A1

公开(公告)日：2025-03-20

申请号：US18467490

申请日：2023-09-14

Applicant: Honeywell International Inc.

Inventor： Jianfeng Wu ,  Steven Tin ,  Matthew Wade Puckett ,  Tiequn Qiu

IPC: G01C19/72 ,  G01C19/66 ,  G02F2/02

Abstract: An interferometric resonator optical gyroscope includes an optical frequency comb generator configured to generate an optical frequency comb. Optical signals representative of the optical frequency comb pass through an optical resonator in different directions, and a rotation rate is determined based on the extent of interference between the optical signals. Parameters of the optical frequency comb generator can be controlled by a control servo based on an intensity of the optical signals after propagating in the optical resonator. Utilizing an optical frequency comb generator reduces the bias error during gyroscope operation.

公开(公告)号：US20250012572A1

公开(公告)日：2025-01-09

申请号：US18348169

申请日：2023-07-06

Applicant: Honeywell International Inc.

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

IPC: G01C19/72

Abstract: A gyroscope comprises first and second light sources that emit first and second beams with broadband spectrums, and a waveguide arrangement that communicates with the light sources. A resonator communicates with the waveguide arrangement to receive the beams. A first circulator is coupled to the waveguide arrangement between the first light source and the resonator. A second circulator is coupled to the waveguide arrangement between the second light source and the resonator. A first rate detector communicates with the resonator through the first circulator, and a second rate detector communicates with the resonator through the second circulator. The rate detectors produce rate measurements based on a detected resonance frequency shift of the beams in the resonator caused by rotation of the gyroscope. Outputs of the rate detectors are used to calculate a rotation rate that is corrected for errors due to a time varying pathlength change in the resonator.

公开(公告)号：US20240271937A1

公开(公告)日：2024-08-15

申请号：US18166792

申请日：2023-02-09

Applicant: Honeywell International Inc.

Inventor： Jianfeng Wu ,  Tiequn Qiu ,  Matthew Wade Puckett

IPC: G01C19/72

CPC classification number: G01C19/727 ,  G01C19/722

Abstract: Techniques are provided for diminishing bias error, in a resonator optical gyroscope, due to an undesired, parasitic optical mode which is orthogonal to a desired optical mode. Energy levels of the undesired, parasitic mode can be diminished utilizing polarizing beam splitters each of which suppresses energy of the undesired, parasitic mode of a clockwise or a counterclockwise optical signal more than energy of the desired mode of the CW optical signal. Optionally, one or more components of a travelling wave resonator system are configured to suppress energy of the undesired, parasitic mode of a clockwise and/or a counterclockwise optical signal more than energy of the desired mode of the respective optical signal(s). Optionally, the desired optical mode is either a transverse magnetic (TM) mode or a transverse electric (TE) mode, and the undesired, parasitic optical mode is respectively the TE mode or the TM mode.