公开(公告)号：US08873063B2

公开(公告)日：2014-10-28

申请号：US13585263

申请日：2012-08-14

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： A low-noise resonator fiber-optic gyroscope is provided. The low-noise resonator fiber-optic gyroscope includes at least one laser to output a reference optical beam, a first-optical-beam frequency controller to modulate the first optical beam at a first-modulation frequency, a second-optical-beam frequency controller to modulate the second optical beam at a second-modulation frequency to form a second-frequency-modulated optical beam, a fiber resonator having a counter-clockwise-input end configured to input the first-frequency-modulated optical beam and the clockwise-input end configured to input the second-frequency-modulated optical beam; a first-frequency demodulator to demodulate an optical beam output from the clockwise-input end of the fiber resonator; and a second-frequency demodulator to demodulate an optical beam output from the counter-clockwise-input end of the fiber resonator. The first-modulation frequency and the second-modulation frequency are adjusted so that sideband noise spectrum centered on the first and second modulation frequencies are from each other.

摘要翻译： 提供了一种低噪声谐振器光纤陀螺仪。 低噪声谐振器光纤陀螺仪包括至少一个用于输出参考光束的激光器，用于以第一调制频率调制第一光束的第一光束频率控制器，第二光束频率控制器 以第二调制频率调制第二光束以形成第二调频光束;光纤谐振器，其具有被配置为输入第一调频光束和顺时针输入的逆时针输入端 端部配置成输入第二频率调制光束; 第一频率解调器，用于解调从光纤谐振器的顺时针输入端输出的光束; 以及第二频率解调器，用于解调从光纤谐振器的逆时针输入端输出的光束。 调整第一调制频率和第二调制频率，使得以第一和第二调制频率为中心的边带噪声频谱彼此相关。

公开(公告)号：US20140049780A1

公开(公告)日：2014-02-20

申请号：US13585263

申请日：2012-08-14

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： A low-noise resonator fiber-optic gyroscope is provided. The low-noise resonator fiber-optic gyroscope includes at least one laser to output a reference optical beam, a first-optical-beam frequency controller to modulate the first optical beam at a first-modulation frequency, a second-optical-beam frequency controller to modulate the second optical beam at a second-modulation frequency to form a second-frequency-modulated optical beam, a fiber resonator having a counter-clockwise-input end configured to input the first-frequency-modulated optical beam and the clockwise-input end configured to input the second-frequency-modulated optical beam; a first-frequency demodulator to demodulate an optical beam output from the clockwise-input end of the fiber resonator; and a second-frequency demodulator to demodulate an optical beam output from the counter-clockwise-input end of the fiber resonator. The first-modulation frequency and the second-modulation frequency are adjusted so that sideband noise spectrum centered on the first and second modulation frequencies are from each other.

摘要翻译： 提供了一种低噪声谐振器光纤陀螺仪。 低噪声谐振器光纤陀螺仪包括至少一个用于输出参考光束的激光器，用于以第一调制频率调制第一光束的第一光束频率控制器，第二光束频率控制器 以第二调制频率调制第二光束以形成第二调频光束;光纤谐振器，其具有被配置为输入第一调频光束和顺时针输入的逆时针输入端 端部配置成输入第二频率调制光束; 第一频率解调器，用于解调从光纤谐振器的顺时针输入端输出的光束; 以及第二频率解调器，用于解调从光纤谐振器的逆时针输入端输出的光束。 调整第一调制频率和第二调制频率，使得以第一和第二调制频率为中心的边带噪声频谱彼此相关。

公开(公告)号：US20130271770A1

公开(公告)日：2013-10-17

申请号：US13445319

申请日：2012-04-12

申请人： Glen A. Sanders ,  Lee K. Strandjord ,  Tiequn Qiu

发明人： Glen A. Sanders ,  Lee K. Strandjord ,  Tiequn Qiu

IPC分类号： G01C19/72

CPC分类号： G01C19/727 ,  G01C19/726 ,  G02B6/2934 ,  G02B6/29379

摘要： A resonator fiber optic gyroscope comprises a first light source having a first frequency comb spectrum, and a second light source having a second frequency comb spectrum. A first filter is in optical communication with the first light source and configured to pass a first frequency comb portion. A second filter is in optical communication with the second light source and configured to pass a second frequency comb portion. A resonator is in optical communication with the first and second filters. The free spectral range values of the first and second frequency comb portions are adjusted to be an odd integer multiple of the free spectral range value of the resonances of the resonator. The second frequency comb portion is spectrally separated apart from the first frequency comb portion by a multiple of the free spectral range value of the resonances plus a frequency value proportional to rotation rate.

摘要翻译： 谐振器光纤陀螺仪包括具有第一频率梳状谱的第一光源和具有第二频率梳状谱的第二光源。 第一滤光器与第一光源光通信并被配置为通过第一频率梳部分。 第二滤光器与第二光源光通信并被配置为通过第二频率梳部分。 谐振器与第一和第二滤波器光学通信。 第一和第二频率梳状部分的自由光谱范围值被调整为谐振器的谐振的自由光谱范围值的奇数整数倍。 第二频率梳部分与第一频率梳部分分开，共振的自由谱范围值的倍数加上与转速成比例的频率值。

公开(公告)号：US20120307251A1

公开(公告)日：2012-12-06

申请号：US13150976

申请日：2011-06-01

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

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

IPC分类号： G01C19/72 ,  H01S3/083 ,  G02B6/26

CPC分类号： G02B6/4215 ,  G01C19/727 ,  G02B6/241 ,  G02B6/29359 ,  G02B6/3624 ,  G02B6/4257 ,  H01S3/0078 ,  H01S3/06712

摘要： 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.

摘要翻译： 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。

公开(公告)号：US08274659B2

公开(公告)日：2012-09-25

申请号：US12871518

申请日：2010-08-30

申请人： Tiequn Qiu ,  Lee K. Strandjord ,  Glen A. Sanders

发明人： Tiequn Qiu ,  Lee K. Strandjord ,  Glen A. Sanders

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： A resonator fiber optic gyroscope (RFOG) is disclosed that reduces rotation rate error instability. In one embodiment, the RFOG comprises a resonator optical ring cavity, a first light source in optical communication with the ring cavity and configured to generate a clockwise optical signal, and a second light source in optical communication with the ring cavity and configured to generate a counter-clockwise optical signal. The RFOG also includes a first optical component in optical communication with the first light source and the ring cavity. The first optical component is configured to prevent the clockwise optical signal from being back-reflected to the first light source. A second optical component is in optical communication with the second light source and the ring cavity. The second optical component is configured to prevent the counter-clockwise optical signal from being back-reflected to the second light source. In addition, a first optical detector and a second optical detector are optically coupled to the ring cavity.

摘要翻译： 公开了一种降低旋转速率误差不稳定性的谐振器光纤陀螺仪（RFOG）。 在一个实施例中，RFOG包括谐振器光环腔，与环腔光学通信并被配置为产生顺时针光信号的第一光源，以及与环腔光学通信的第二光源，并且被配置为产生 逆时针光信号。 RFOG还包括与第一光源和环腔光学通信的第一光学部件。 第一光学部件被配置为防止顺时针光信号被反射到第一光源。 第二光学部件与第二光源和环形腔光学连通。 第二光学部件被配置为防止逆时针光信号被反射到第二光源。 此外，第一光学检测器和第二光学检测器光耦合到环形腔。

公开(公告)号：US08259301B2

公开(公告)日：2012-09-04

申请号：US12565510

申请日：2009-09-23

申请人： Lee Strandjord ,  Glen A. Sanders ,  Tiequn Qiu

发明人： Lee Strandjord ,  Glen A. Sanders ,  Tiequn Qiu

IPC分类号： G01C19/72

CPC分类号： G01C19/72

摘要： Systems and methods for reducing rotation sensing errors in a resonator fiber optic gyroscope. An example method propagates a primary light wave through a resonator having an optical fiber and a plurality of optical surfaces for directing the light wave exiting a first end of the optical fiber back into an opposite end of the optical fiber. The optical fiber is wound onto a piezo-electric transducer (PZT) tube. A sinusoidal voltage is applied to the PZT tube to modulate a length of a fiber cavity within the optical fiber. The amplitude and frequency of the fiber cavity length modulation is selected to produce a relative phase modulation between the primary light wave and a double-back reflected light wave, such that the rotation sensing errors resulting from double backscatter of light is at a frequency above a frequency band of interest. This allows the associated error to be filtered out of the rotation rate signal.

摘要翻译： 用于减少谐振器光纤陀螺仪中的旋转感测误差的系统和方法。 一个示例性方法通过具有光纤和多个光学表面的谐振器传播初级光波，用于将从光纤的第一端离开的光波引导回光纤的相对端。 将光纤缠绕在压电换能器（PZT）管上。 将正弦电压施加到PZT管以调制光纤内的纤维腔的长度。 选择光纤腔长度调制的幅度和频率以在初级光波和双反射反射光波之间产生相对相位调制，使得由双向后向散射引起的旋转感测误差处于高于 感兴趣的频段。 这允许将相关联的错误从旋转速率信号中滤除。

公开(公告)号：US20120057167A1

公开(公告)日：2012-03-08

申请号：US12876796

申请日：2010-09-07

申请人： Lee K. Strandjord ,  Glen A. Sanders ,  Tiequn Qiu

发明人： Lee K. Strandjord ,  Glen A. Sanders ,  Tiequn Qiu

IPC分类号： G01C19/72

CPC分类号： G01C19/727 ,  G01C19/723

摘要： A RFOG comprises a reference laser configured to produce a reference laser beam; a first laser source configured to produce a first laser beam; a second laser source configured to produce a second laser beam; a sensing resonator coupled to the first and second laser sources such that the first and second laser beams propagate through the sensing resonator in first and second directions, respectively; resonance tracking electronics configured to generate first and second control signals that indicate when the first and second laser beams, respectively, are off resonance; first and second optical combiners configured to beat the first and second outputs of the sensing resonator with the reference laser beam creating first and second beat signals, respectively; wherein the resonance tracking electronics is configured to discriminate between at least one rotation-sensing error and the first and second outputs of the resonator based on the first and second beat signals.

摘要翻译： RFOG包括被配置为产生参考激光束的参考激光器; 第一激光源，被配置为产生第一激光束; 被配置为产生第二激光束的第二激光源; 耦合到第一和第二激光源的感测谐振器，使得第一和第二激光束分别在第一和第二方向上传播通过感测谐振器; 谐振跟踪电子器件被配置为产生指示第一和第二激光束何时分离谐振的第一和第二控制信号; 第一和第二光学组合器被配置为分别用产生第一和第二拍频信号的参考激光束击打感测谐振器的第一和第二输出; 其中所述谐振跟踪电子设备被配置为基于所述第一和第二拍频信号来区分所述至少一个旋转感测误差和所述谐振器的所述第一和第二输出。

公开(公告)号：US20120007584A1

公开(公告)日：2012-01-12

申请号：US12834150

申请日：2010-07-12

申请人： Glen A. Sanders

发明人： Glen A. Sanders

IPC分类号： G01R31/00

CPC分类号： G01R15/246

摘要： A sensor head assembly is provided, comprising a quarter wave device having shape-induced-birefringence and a sensing coil coupled to the quarter wave device and operable to wind around a current conductor. The quarter wave device converts linearly polarized light from a polarization maintaining fiber to circularly polarized light.

摘要翻译： 提供了一种传感器头部组件，其包括具有形状诱导双折射的四分之一波长装置和耦合到该四分之一波长装置的可操作以围绕电流导体缠绕的感测线圈。 四分之一波长装置将来自偏振保持光纤的线偏振光转换成圆偏振光。

公开(公告)号：US20110141477A1

公开(公告)日：2011-06-16

申请号：US12644271

申请日：2009-12-22

申请人： Glen A. Sanders ,  Tiequn Qiu ,  Lee K. Strandjord

发明人： Glen A. Sanders ,  Tiequn Qiu ,  Lee K. Strandjord

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： A resonator gyroscope comprises a reference laser generator to produce a reference light; a first slave light source to produce a first slave light locked to the reference light; a second slave light source to produce a second slave light locked to the reference light; a first optical filter cavity coupled to at least one of the first and second slave light sources to filter out high-frequency fluctuations in the respective first and second slave lights; a resonator coupled to said first and second light sources, the resonator having first and second counter-propagating directions and resonance tracking electronics coupled to the resonator to generate a first beat frequency, a second beat frequency, and a third beat frequency; wherein the rotational rate of the resonator gyroscope is a function of the first, second and third beat frequencies.

摘要翻译： 谐振器陀螺仪包括参考激光发生器以产生参考光; 第一从光源，用于产生锁定到参考光的第一从光; 第二从光源，用于产生锁定到参考光的第二从光; 耦合到所述第一和第二从属光源中的至少一个的第一光学滤波器空腔以滤除相应的第一和第二从属灯中的高频波动; 耦合到所述第一和第二光源的谐振器，所述谐振器具有耦合到谐振器的第一和第二反向传播方向和谐振跟踪电子器件，以产生第一拍频，第二拍频和第三拍频; 其中所述谐振器陀螺仪的旋转速率是所述第一，第二和第三拍频的函数。

公开(公告)号：US07952772B2

公开(公告)日：2011-05-31

申请号：US12463009

申请日：2009-05-08

申请人： Glen A. Sanders

发明人： Glen A. Sanders

IPC分类号： G01B9/02 ,  G02B6/00

CPC分类号： G02B6/02385 ,  G01N21/39 ,  G01N21/7746 ,  G01N2021/7766 ,  G01N2021/7789 ,  G02B6/02366

摘要： Apparatus and method for chemical and biological agent sensing. An example sensing apparatus includes a resonator having a resonance frequency. The resonator includes a coil of a photonic crystal fiber. The photonic crystal fiber has a solid region configured to guide a substantially single optical mode of light having, a cladding surrounding an exterior of the solid region, and at least one hollow core within the cladding. The cladding contains at least one hollow core. The photonic crystal fiber is configured to introduce a fluid that may contain an analyte to the hollow core. The photonic crystal fiber is configured so that the light interacts with the fluid. The resonator is configured to produce a resonance signal centered at the resonance frequency. A predetermined change in the resonance signal indicates a presence of a quantity of the analyte in the fluid.

摘要翻译： 用于化学和生物试剂感测的装置和方法。 感测装置的示例包括具有共振频率的谐振器。 谐振器包括光子晶体光纤的线圈。 光子晶体光纤具有被配置为引导基本上单一的光学模式的固体区域，该光学模式具有围绕固体区域的外部的包层以及包层内的至少一个空心芯。 包层至少包含一个中空芯。 光子晶体光纤被配置为将可能含有分析物的流体引入中空芯。 光子晶体光纤被配置成使得光与流体相互作用。 谐振器被配置为产生以谐振频率为中心的谐振信号。 谐振信号中的预定变化表示流体中存在一定量的分析物。