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    Ruggedized structure for fiber optic gyroscope
    1.
    发明授权
    Ruggedized structure for fiber optic gyroscope 有权
    光纤陀螺的坚固结构

    公开(公告)号：US06320664B1

    公开(公告)日：2001-11-20

    申请号：US09224612

    申请日：1998-12-31

    Applicant: Andrew W. Kaliszek ,  Glen A. Sanders ,  Clarence E. Laskoskie

    Inventor： Andrew W. Kaliszek ,  Glen A. Sanders ,  Clarence E. Laskoskie

    IPC: G01C1972

    CPC classification number: G01C19/722

    Abstract: A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope-operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form, which is used in a control system to null out optical intensity variations at the frequencies of vibration.

    Abstract translation: 一种用于光纤陀螺仪的整流误差减小器，其是用于减少由陀螺仪操作环境引起的振动频率下的调制引起的光信号中的振动效应的强度伺服或补偿器。 可以在振幅形式的光电二极管输出的信号中检测振动效应，其用于控制​​系统以消除振动频率处的光强度变化。

    High performance hollow-core optical-fiber filter for optical rotation sensing
    6.
    发明授权
    High performance hollow-core optical-fiber filter for optical rotation sensing 有权
    用于光学旋转传感的高性能中空光纤光纤滤波器

    公开(公告)号：US08422024B2

    公开(公告)日：2013-04-16

    申请号：US13150976

    申请日：2011-06-01

    Applicant: Glen A. Sanders ,  Lee K. Strandjord ,  Tiequn Qiu ,  John Feth ,  Andrew W. Kaliszek

    Inventor： Glen A. Sanders ,  Lee K. Strandjord ,  Tiequn Qiu ,  John Feth ,  Andrew W. Kaliszek

    IPC: G01B9/02

    CPC classification number: G02B6/4215 ,  G01C19/727 ,  G02B6/241 ,  G02B6/29359 ,  G02B6/3624 ,  G02B6/4257 ,  H01S3/0078 ,  H01S3/06712

    Abstract: A hollow-core optical-fiber filter is provided. The hollow-core optical-fiber filter includes a hollow-core optical fiber having a first end-face and an opposing second end-face. The first end-face and the second end-face set a fiber length. The hollow-core optical-fiber filter also includes a first reflective end-cap positioned at the first end-face and a second reflective end-cap positioned at the second end-face. When an optical beam from a laser is coupled into one of the first end-face or the second end-face, an optical output from the opposing end-face has a narrow linewidth and low frequency noise fluctuations.

    Abstract translation: 提供了一种中空纤维光纤过滤器。 中空纤维光纤过滤器包括具有第一端面和相对的第二端面的中空纤维光纤。 第一端面和第二端面设置光纤长度。 中空纤维光纤过滤器还包括位于第一端面处的第一反射端盖和位于第二端面处的第二反射端盖。 当来自激光器的光束被耦合到第一端面或第二端面中的一个时，来自相对端面的光输出具有窄线宽和低频噪声波动。

    System and method for reducing errors in a resonator fiber optic gyroscope
    7.
    发明授权
    System and method for reducing errors in a resonator fiber optic gyroscope 有权
    用于减少谐振器光纤陀螺仪中的误差的系统和方法

    公开(公告)号：US08908187B2

    公开(公告)日：2014-12-09

    申请号：US13287422

    申请日：2011-11-02

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

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

    IPC: G01C19/64 ,  G01C19/72

    CPC classification number: G01C19/727 ,  G01C19/722

    Abstract: An exemplary resonator fiber optic gyroscope comprises a resonator having an optical fiber loop; a light source configured to generate a light beam; and an intensity modulation circuit coupled between the light source and the resonator. The intensity modulation circuit is configured to modulate the intensity of the light beam from the light source to output an intensity modulated signal to the resonator. The intensity modulation circuit is configured to produce the intensity modulated signal such that harmonics of the intensity modulated signal which overlap a primary wave of a counter-propagating light beam in the resonator have an amplitude below a predetermined threshold. Amplitudes below the predetermined threshold are negligible.

    Abstract translation: 一种示例性的谐振器光纤陀螺仪包括具有光纤回路的谐振器; 被配置为产生光束的光源; 以及耦合在光源和谐振器之间的强度调制电路。 强度调制电路被配置为调制来自光源的光束的强度，以将强度调制信号输出到谐振器。 强度调制电路被配置为产生强度调制信号，使得与谐振器中的相反传播光束的主波重叠的强度调制信号的谐波具有低于预定阈值的幅度。 低于预定阈值的幅度可以忽略不计。

    RFOG modulation error correction
    8.
    发明授权
    RFOG modulation error correction 有权
    RFOG调制纠错

    公开(公告)号：US07855789B2

    公开(公告)日：2010-12-21

    申请号：US12167056

    申请日：2008-07-02

    Applicant: Lee K. Strandjord ,  Glen A. Sanders

    Inventor： Lee K. Strandjord ,  Glen A. Sanders

    IPC: G01C19/72

    CPC classification number: G01C19/727

    Abstract: Systems and methods for performing modulation error correction. An example system applies common phase/frequency modulation to first and second laser beams, a first intensity modulation to the first modulated beam, and a second intensity modulation to the second modulated beam. Signals outputted are demodulated according to the frequency of the common phase/frequency modulation. Then the first of these demodulated signals is demodulated based on the frequency of the intensity modulation of the first beam, and the second of these demodulated signals is demodulated based on the frequency of the intensity modulation of the second beam. Then, rate of rotation is determined based on demodulated signals. Frequencies of the intensity modulations are unequal and not harmonically related, and intensity modulation encodes each light beam with a unique signature.

    Abstract translation: 用于执行调制误差校正的系统和方法。 示例性系统将共同相位/频率调制应用于第一和第二激光束，对第一调制光束进行第一强度调制，以及对第二调制光束进行第二强度调制。 输出的信号根据共同相位/频率调制的频率进行解调。 然后，基于第一光束的强度调制的频率对这些解调信号中的第一个进行解调，并且基于第二光束的强度调制的频率对这些解调信号中的第二个进行解调。 然后，基于解调信号确定旋转速率。 强度调制的频率是不相等的，而不是谐波相关的，强度调制对每个光束进行独特的签名编码。

    Kerr effect compensated optical ring resonator
    9.
    发明授权
    Kerr effect compensated optical ring resonator 有权
    克尔效应补偿光环谐振器

    公开(公告)号：US07844152B2

    公开(公告)日：2010-11-30

    申请号：US12167219

    申请日：2008-07-02

    Applicant: Glen A. Sanders

    Inventor： Glen A. Sanders

    IPC: G02B6/00 ,  H01S3/08 ,  G02F1/01 ,  G01C19/64

    CPC classification number: G01C19/727 ,  G02F1/3544 ,  G02F1/37 ,  G02F2203/15

    Abstract: Systems and methods for compensating for nonlinear phase shift accumulation in an optical ring resonator. An example method includes sending a first beam in a clockwise direction around the optical ring resonator and sending a second beam in a counterclockwise direction around the optical ring resonator. Then, nonlinear phase shift accumulation of the first and second beams is compensated for within the optical ring resonator. Compensating includes creating a negative Kerr effect phase shift for each beam based on an estimate of accumulated positive Kerr effect.

    Abstract translation: 用于补偿光环谐振器中的非线性相移累积的系统和方法。 示例性方法包括围绕光环谐振器沿顺时针方向发送第一光束，并沿光环谐振器周围的逆时针方向发送第二光束。 然后，在光环谐振器内补偿第一和第二波束的非线性相移累积。 补偿包括基于积累的正克尔效应的估计为每个波束产生负的克尔效应相移。

    SYSTEMS AND METHODS FOR RESONATOR FIBER OPTIC GYROSCOPE INTENSITY MODULATION CONTROL
    10.
    发明申请
    SYSTEMS AND METHODS FOR RESONATOR FIBER OPTIC GYROSCOPE INTENSITY MODULATION CONTROL 有权
    谐振光纤陀螺强度调制控制系统与方法

    公开(公告)号：US20100253948A1

    公开(公告)日：2010-10-07

    申请号：US12729660

    申请日：2010-03-23

    Applicant: Lee K. Strandjord ,  Glen A. Sanders ,  Norman Gerard Tarleton

    Inventor： Lee K. Strandjord ,  Glen A. Sanders ,  Norman Gerard Tarleton

    IPC: G01C19/72

    CPC classification number: G01C19/727

    Abstract: Systems and methods for improved resonator fiber optic gyroscope intensity modulation control are provided. In one embodiment, a resonant fiber optic gyroscope (RFOG) having a residual intensity modulation (RIM) controller comprises: an intensity modulator optically coupled to receive a light beam from a laser source modulated at a resonance detection modulation frequency; an optical tap device optically coupled to the intensity modulator; and a feedback servo coupled to the optical tap device and the intensity modulator, the demodulating feedback servo generating a sinusoidal feedback signal to the intensity modulator. The feedback servo adjusts an amplitude and phase of the sinusoidal feedback signal provided to intensity modulator based on a residual intensity modulation detected by the demodulating feedback servo.

    Abstract translation: 提供了改进谐振器光纤陀螺仪强度调制控制的系统和方法。 在一个实施例中，具有残余强度调制（RIM）控制器的谐振光纤陀螺仪（RFOG）包括：光耦合的光强调制器，用于接收来自以谐振检测调制频率调制的激光源的光束; 与所述强度调制器光耦合的光学抽头装置; 以及耦合到光学抽头装置和强度调制器的反馈伺服器，解调反馈伺服器向强度调制器产生正弦反馈信号。 基于由解调反馈伺服检测到的残余强度调制，反馈伺服调节提供给强度调制器的正弦反馈信号的幅度和相位。

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