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公开(公告)号：US10197397B2
公开(公告)日：2019-02-05
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
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.
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72.发明申请公开(公告)号：US20190017824A1
公开(公告)日：2019-01-17
申请号：US15611742
申请日：2017-06-01
Applicant: Honeywell International Inc.
Inventor： Tiequn Qiu , Jianfeng Wu , Matthew Wade Puckett
Abstract: In one embodiment, a method is provided. The method comprises transmitting a first laser pump signal to an optical resonator; adjusting a frequency of the first laser pump signal; generating a first order Stokes signal from the first laser pump signal in an optical resonator; measuring a first beat signal frequency; ceasing transmission of the first laser pump signal to the optical resonator; transmitting a second laser pump signal to the optical resonator; adjusting a frequency of the second laser pump signal; generating a first order Stokes signal from the second laser pump signal in the optical resonator; and measuring a second beat signal frequency; ceasing transmission of the second laser pump signal to the optical resonator.
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公开(公告)号：US20180275254A1
公开(公告)日：2018-09-27
申请号：US15604390
申请日：2017-05-24
Applicant: Honeywell International Inc.
Inventor： Jianfeng Wu , Matthew Wade Puckett , Tiequn Qiu , Glen A. Sanders
CPC classification number: G01S7/4865 , G01S7/4816 , G01S7/4868 , G01S7/4876 , G01S7/493 , G01S7/51 , G01S17/08 , G01S17/10 , G01S17/107 , G01S17/89 , G06T5/003
Abstract: In one embodiment, a method of operating a glare reduction and ranging optical system having an image sensor with pixels is provided. The method comprises: generating a first light beam with a power spectral density; generating a reference light beam from the first light beam; emitting the first light beam with a power spectral density; collecting scattered light and reflected light respectively reflected from a scattering medium and a target; determining a power spectral density of the first light beam so that the first light beam is substantially coherent with the scattered light; adjusting the power spectral density of the first light beam so that the reference light beam is substantially coherent with the scattered light; on a pixel by pixel basis, modifying the amplitude and phase of the reference light beam to minimize the DC light power at each pixel; storing the modified amplitude and phase that results in a substantially minimum detected DC light power for each pixel; increasing power spectral density of a second reference light beam; modulating the amplitude of the second reference light beam with a sinusoidal signal having a frequency; on a pixel by pixel basis, detecting the substantially maximum signal level at the modulation frequency on a pixel by adjusting a second delay of the reference light beam; and determining range to a target.
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公开(公告)号：US20180143022A1
公开(公告)日：2018-05-24
申请号：US15360875
申请日：2016-11-23
Applicant: Honeywell International Inc.
Inventor： Glen A. Sanders , Lee K. Strandjord , Tiequn Qiu
IPC: G01C19/72
CPC classification number: G01C19/727 , G01C19/72
Abstract: In one embodiment, a method is provided. The method comprises generating a waveform; measuring signals representative of angular rotation rate in a linear region of the waveform; and diminishing bias error about at least one of a waveform's maxima and minima.
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公开(公告)号：US09683830B2
公开(公告)日：2017-06-20
申请号：US14565900
申请日：2014-12-10
Applicant: Honeywell International Inc.
Inventor： Tiequn Qiu , Steven J. Sanders
CPC classification number: G01B9/02007 , G01B9/02058 , G01B2290/70 , G01C19/72 , G01P3/36 , H01S3/067 , H01S3/06795 , H01S3/094003 , H01S3/09415 , H01S3/13 , H01S3/1603 , H01S3/2383 , H01S2301/04
Abstract: A fiber light source comprises a laser pump configured to generate a pump laser beam at a predetermined wavelength; a first segment of rare earth doped fiber; a second segment of rare earth doped fiber; and an optical coupler coupled to a first end of the first segment and a first end of the second segment. The optical coupler is configured to split the pump laser beam based on a power coupling ratio. The first segment generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that a combined stimulated emission is approximately insensitive to pump laser power fluctuations.
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Patent Agency Ranking
公开(公告)号：US09587945B2
公开(公告)日：2017-03-07
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。
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77.发明授权Systems and methods for fiber optic gyroscopes utilizing reference ring resonators 有权使用参考环谐振器的光纤陀螺仪的系统和方法公开(公告)号：US09459101B1
公开(公告)日：2016-10-04
申请号：US14739393
申请日：2015-06-15
Applicant: Honeywell International Inc.
Inventor： Lee K. Strandjord , Glen A. Sanders , Tiequn Qiu
IPC: G01C19/72
CPC classification number: G01C19/727 , G01C19/72 , G01C19/66 , G01C19/64
Abstract: Systems and methods for fiber optic gyroscopes are provided. In one embodiment, a resonating fiber optic gyroscope comprises: first and second laser sources producing first and second optical beams; a first resonator having a hub comprising a hub material, wherein the first and second optical beams circulate within the first resonator in opposite directions; a second resonator having a hub comprising the hub material, wherein the first and second optical beams circulate within the second resonator in opposite directions; first and second servo loops; the first loop controls the first laser source based on a beam that has circulated through the first resonator and a beam that has circulated through the second resonator; the second servo loop controls the second laser source based on a beam that has circulated through the first resonator and a beam that has circulated through the second resonator; and a rotation rate detection circuit.
Abstract translation: 提供了光纤陀螺仪的系统和方法。 在一个实施例中，谐振光纤陀螺仪包括：产生第一和第二光束的第一和第二激光源; 第一谐振器，其具有毂，其包括毂材料，其中所述第一和第二光束在所述第一谐振器内在相反方向上循环; 第二谐振器，其具有包括所述毂材料的毂，其中所述第一和第二光束在所述第二谐振器内沿相反方向循环; 第一和第二伺服回路; 第一环路基于已经循环通过第一谐振器的光束和已经循环通过第二谐振器的光束来控制第一激光源; 第二伺服环路基于已经循环通过第一谐振器的光束和已经循环通过第二谐振器的光束来控制第二激光源; 和转速检测电路。
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78.发明授权Three-laser resonator fiber optic gyroscope with enhanced frequency reference cavity 有权具有增强型频率参考腔的三激光谐振器光纤陀螺仪公开(公告)号：US09389081B1
公开(公告)日：2016-07-12
申请号：US14690148
申请日：2015-04-17
Applicant: Honeywell International Inc.
Inventor： Lee K. Strandjord , Glen A. Sanders , Tiequn Qiu
CPC classification number: G01C19/727 , G01C19/64 , G01C19/72 , H01S5/005 , H01S5/0687 , H01S5/1071 , H01S5/12 , H01S5/4025
Abstract: A resonator fiber optic gyroscope comprises a master laser that emits a reference optical signal, a first slave laser that emits a first optical signal and is responsive to the reference optical signal through a first optical phase lock loop (OPLL), and a second slave laser that emits a second optical signal and is responsive to the reference optical signal through a second OPLL. A reference resonator in optical communication with the master laser receives the reference optical signal, and comprises a first fiber optic coil having a first cavity length. A gyro resonator, in optical communication with the first and second slave lasers, receives the first and second optical signals. The gyro resonator comprises a second fiber optic coil having a second cavity length longer than the first cavity length. The reference resonator has an operating frequency that substantially tracks with an operating frequency of the gyro resonator.
Abstract translation: 谐振器光纤陀螺仪包括发射参考光信号的主激光器，发射第一光信号并通过第一光锁相环（OPLL）响应参考光信号的第一从激光器，以及第二从激光器 其发射第二光信号并且通过第二OPLL响应于参考光信号。 与主激光器进行光通信的参考谐振器接收参考光信号，并且包括具有第一腔长度的第一光纤线圈。 与第一和第二从属激光器光学通信的陀螺谐振器接收第一和第二光学信号。 陀螺谐振器包括具有比第一腔长度更长的第二腔长度的第二光纤线圈。 参考谐振器具有基本上以陀螺谐振器的工作频率跟踪的工作频率。
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79.发明授权Controlled modulation of light beam with highly stable suppression of carrier or sidebands 有权光束的受控调制，高度稳定地抑制载波或边带公开(公告)号：US09170108B1
公开(公告)日：2015-10-27
申请号：US14303174
申请日：2014-06-12
Applicant: Honeywell International Inc.
Inventor： Tiequn Qiu , Glen A. Sanders , Jianfeng Wu , Lee K. Strandjord
CPC classification number: G01C19/721 , H01S3/1304 , H01S3/1305 , H04B10/50572 , H04B10/5165
Abstract: A light-source system to output at least one stable phase modulated coherent light beam is provided. The light-source system includes a multi-frequency laser system, at least one phase modulator, at least one feedback photodetector, and at least one modulation servo. The multi-frequency laser system emits a reference light beam and provides at least one unmodulated-light beam having a respective at least one carrier frequency offset from the reference carrier frequency. The phase modulator modulates the unmodulated-light beam provided by the multi-frequency laser system. The frequency-selection device monitors a frequency component of interest. The feedback photodetector provides information indicative of beat frequencies between the reference light beam and the modulated-light beam. The modulation servo adjusts a modulation amplitude applied to the phase modulator to substantially suppress one of: the respective electric field at a carrier frequency; or the electric field components at the frequencies associated with a selected sideband-pair.
Abstract translation: 提供了一种用于输出至少一个稳定的相位调制相干光束的光源系统。 光源系统包括多频激光系统，至少一个相位调制器，至少一个反馈光电检测器和至少一个调制伺服器。 多频激光系统发射参考光束并提供至少一个具有与参考载波频率相应的至少一个载波频率偏移的未调制光束。 相位调制器调制由多频激光系统提供的未调制光束。 频率选择装置监视感兴趣的频率分量。 反馈光电检测器提供指示参考光束和调制光束之间的拍频的信息。 调制伺服调整施加到相位调制器的调制幅度，以基本上抑制载波频率处的相应电场之一; 或与选择的边带对相关联的频率处的电场分量。
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公开(公告)号：US20150285635A1
公开(公告)日：2015-10-08
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
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。
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