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公开(公告)号：US10928200B1
公开(公告)日：2021-02-23
申请号：US16665939
申请日：2019-10-28
Applicant: Honeywell International Inc.
Inventor： Jianfeng Wu , Matthew Wade Puckett , Karl D. Nelson
Abstract: A SBS laser system comprises at least one pump laser that emits a pump beam, and an intensity modulator in communication with the pump laser. The intensity modulator modulates an intensity of the pump beam and transmits an intensity modulated beam. A resonator, in communication with the intensity modulator, is configured to receive the intensity modulated beam such that it travels in a first direction. When optical frequency of the intensity modulated beam matches resonance frequency of the resonator, a power density increases such that beyond a certain threshold power, the intensity modulated beam produces lasing of a first order Brillouin wave including a SBS wave having a SBS gain peak. The SBS wave travels in an opposite second direction in the resonator. A control unit eliminates or reduces the intensity modulation of the beam by minimizing the frequency gap between the SBS gain peak and an SBS resonance peak.
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公开(公告)号：US10578722B2
公开(公告)日：2020-03-03
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
IPC: G01S17/89 , G06T5/00 , G01S7/4865 , G01S17/10 , G01S7/486 , G01S7/51 , G01S7/481 , G01S17/08 , G01S7/487 , G01S7/493 , G01S17/18
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：US20200056889A1
公开(公告)日：2020-02-20
申请号：US16104813
申请日：2018-08-17
Applicant: Honeywell International Inc.
Inventor： Alan Bruce Touchberry , Jianfeng Wu , Lance Vrieze
Abstract: A multilayer mirror, ring laser gyroscope and method are disclosed. For example, the multilayer mirror includes a plurality of alternating layers of a high index of refraction optical material and a low index of refraction optical material, an amplification layer of an optical material disposed on the plurality of alternating layers, and a coating of an anti-reflective material disposed on an outermost surface of the optical material amplification layer.
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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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75.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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Patent Agency Ranking
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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77.发明授权Resonator fiber optic gyroscope employing common cavity length modulation along with high bandwidth laser stabilization 有权谐振器光纤陀螺仪采用公共腔长度调制以及高带宽激光稳定公开(公告)号：US09354064B2
公开(公告)日：2016-05-31
申请号：US14325006
申请日：2014-07-07
Applicant: Honeywell International Inc.
Inventor： Lee K. Strandjord , Glen A. Sanders , Jianfeng Wu
IPC: G01C19/72
CPC classification number: G01C19/727 , G01C19/721
Abstract: A resonator fiber optic gyroscope comprises a master laser device that emits a reference optical signal, a first slave laser device that emits a clockwise optical signal, and a second slave laser device that emits a counter-clockwise optical signal. A resonator ring cavity is in communication with the master laser device and the slave laser devices. A sine wave generator is coupled to the resonator ring cavity and outputs a common cavity modulation frequency comprising in-phase and quadrature signals. A laser stabilization servo receives a clockwise reflection signal that includes the common cavity modulation frequency from the resonator ring cavity. A modulation stripper coupled to the servo receives the in-phase and quadrature signals, receives a net error signal from the servo, demodulates the net error signal at the common cavity modulation frequency, and transmits a stripper signal to the servo to remove the signal at the common cavity modulation frequency.
Abstract translation: 谐振器光纤陀螺仪包括发射参考光信号的主激光装置，发射顺时针光信号的第一从激光装置和发射逆时针光信号的第二从激光装置。 谐振腔环与主激光器件和从属激光器件通信。 正弦波发生器耦合到谐振器环腔并输出包括同相和正交信号的公共调制频率。 激光稳定伺服机构接收包括来自谐振腔环的公共腔调制频率的顺时针反射信号。 耦合到伺服器的调制剥离器接收同相和正交信号，从伺服器接收净误差信号，解调公共空腔调制频率处的净误差信号，并将去耦信号发送到伺服器以去除信号 共腔调制频率。
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78.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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79.发明授权Methods and apparatus of tracking/locking resonator free spectral range and its application in resonator fiber optic gyroscope 有权谐振器自由光谱范围跟踪/锁定的方法和装置及其在谐振器光纤陀螺仪中的应用公开(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
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。
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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
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。
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