公开(公告)号：US08908187B2

公开(公告)日：2014-12-09

申请号：US13287422

申请日：2011-11-02

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

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

IPC分类号： G01C19/64 ,  G01C19/72

CPC分类号： G01C19/727 ,  G01C19/722

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07522284B2

公开(公告)日：2009-04-21

申请号：US11540771

申请日：2006-09-29

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

摘要： Methods and apparatus are provided for attenuating rotation rate errors in a resonator gyro. The gyro includes a ring resonator having a hollow core optical fiber coil and optical elements that are selected and/or oriented to reduce stray light that may be present in input light beams introduced to the ring resonator. The resonator has a predetermined mode. One of the optical elements partially transmits a portion of the input light beam to a first end of the fiber coil while partially transmitting a portion of the input light beam to a filter. Light having the predetermined mode is accepted into the first end of the fiber coil, and the filter accepts light of the input light beam having a corresponding mode. Transmission components of the circulating light beams indicates resonance peaks of the counter-propagating directions of the ring resonator.

摘要翻译： 提供了用于衰减谐振器陀螺仪中的转速误差的方法和装置。 陀螺仪包括具有中空纤芯光纤线圈的环形谐振器和选择和/或取向以减少可能存在于引入环形谐振器的输入光束中的杂散光的光学元件。 谐振器具有预定模式。 一个光学元件将输入光束的一部分部分地传输到光纤线圈的第一端，同时部分地将输入光束的一部分传输到滤光器。 具有预定模式的光被接受到光纤线圈的第一端，并且滤光器接受具有相应模式的输入光束的光。 循环光束的透射分量表示环形谐振器的相反传播方向的共振峰值。

公开(公告)号：US08923352B2

公开(公告)日：2014-12-30

申请号：US13571887

申请日：2012-08-10

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

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

IPC分类号： H01S3/13

CPC分类号： H01S3/1305 ,  G01C19/727 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/10092 ,  H01S3/1303 ,  H01S3/1304 ,  H01S3/1307 ,  H01S3/2383 ,  H01S2301/02

摘要： 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.

摘要翻译： 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：US08446590B2

公开(公告)日：2013-05-21

申请号：US13150990

申请日：2011-06-01

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727 ,  G02B6/29359

摘要： An optical-fiber filter is provided. The optical-fiber filter includes an 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 first end-face and the second end-face are coated with reflective coatings. When an optical beam emitted from a laser is coupled into one of the first end-face or the second end-face, an optical beam output from the opposing end-face has a narrow linewidth and low frequency noise fluctuations.

摘要翻译： 提供光纤滤波器。 光纤滤波器包括具有第一端面和相对的第二端面的光纤。 第一端面和第二端面设置光纤长度。 第一端面和第二端面涂有反射涂层。 当从激光器发射的光束被耦合到第一端面或第二端面中的一个时，从相对端面输出的光束具有窄线宽和低频噪声波动。

公开(公告)号：US20120307253A1

公开(公告)日：2012-12-06

申请号：US13150990

申请日：2011-06-01

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

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

IPC分类号： G01C19/72 ,  G02B6/26

CPC分类号： G01C19/727 ,  G02B6/29359

摘要： An optical-fiber filter is provided. The optical-fiber filter includes an 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 first end-face and the second end-face are coated with reflective coatings. When an optical beam emitted from a laser is coupled into one of the first end-face or the second end-face, an optical beam output from the opposing end-face has a narrow linewidth and low frequency noise fluctuations.

摘要翻译： 提供光纤滤波器。 光纤滤波器包括具有第一端面和相对的第二端面的光纤。 第一端面和第二端面设置光纤长度。 第一端面和第二端面涂有反射涂层。 当从激光器发射的光束被耦合到第一端面或第二端面中的一个时，从相对端面输出的光束具有窄线宽和低频噪声波动。

公开(公告)号：US20110292396A1

公开(公告)日：2011-12-01

申请号：US12789972

申请日：2010-05-28

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

摘要： A resonator fiber optic gyroscope includes a sensing resonator having a first resonance frequency for a first laser beam propagation direction and a second resonance frequency for a second laser beam propagation direction; an intensity modulator coupled to an output of the sensing resonator and configured to modulate the intensity of a signal output from the sensing resonator, wherein the intensity modulator modulates the output signal at an intensity modulation frequency; and resonance tracking electronics coupled to an output of the intensity modulator and configured to demodulate the intensity modulated signal output from the intensity modulator at a resonance tracking modulation frequency to produce a first demodulated signal; the resonance tracking electronics further configured to demodulate the first demodulated signal at the intensity modulation frequency, wherein the intensity modulation frequency is different from the resonance tracking modulation frequency.

摘要翻译： 谐振器光纤陀螺仪包括：感测谐振器，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调制从感测谐振器输出的信号的强度的强度调制器，其中强度调制器以强度调制频率调制输出信号; 以及谐振跟踪电子器件耦合到所述强度调制器的输出并且被配置为以谐振跟踪调制频率解调从所述强度调制器输出的强度调制信号，以产生第一解调信号; 谐振跟踪电子器件还被配置为以强度调制频率解调第一解调信号，其中强度调制频率不同于谐振跟踪调制频率。

公开(公告)号：US09207082B2

公开(公告)日：2015-12-08

申请号：US13586055

申请日：2012-08-15

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727 ,  G01C19/72 ,  G01C19/721

摘要： One embodiment is directed to a resonator fiber optic gyroscope (RFOG). The optical fiber resonator includes an optical fiber, one or more optical filters that suppresses the noise light in the resonator, one or more variable optical attenuators (VOAs) that can adjust the loss of the resonator with fast response, and one or more optical gain elements that provide amplification of light to offset part of the losses of the resonator. The RFOG also includes one or more pump lasers to produce one or more pump beams for the gain elements in the resonator and control electronics configured to control the one or more pump lasers and the one or more variable optical attenuators, such that the round-trip loss of the resonator is a substantially constant, positive value.

摘要翻译： 一个实施例涉及一种谐振器光纤陀螺仪（RFOG）。 光纤谐振器包括光纤，抑制谐振器中的噪声光的一个或多个滤光器，可以快速响应地调节谐振器损耗的一个或多个可变光衰减器（VOA）以及一个或多个光增益 提供光的放大以偏移谐振器的损耗的一部分的元件。 RFOG还包括一个或多个泵浦激光器以产生用于谐振器中的增益元件的一个或多个泵浦光束，以及被配置为控制一个或多个泵激光器和一个或多个可变光衰减器的控制电子设备，使得往返 谐振器的损耗是基本恒定的正值。

公开(公告)号：US20150260520A1

公开(公告)日：2015-09-17

申请号：US13586055

申请日：2012-08-15

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727 ,  G01C19/72 ,  G01C19/721

摘要： One embodiment is directed to a resonator fiber optic gyroscope (RFOG). The optical fiber resonator includes an optical fiber, one or more optical filters that suppresses the noise light in the resonator, one or more variable optical attenuators (VOAs) that can adjust the loss of the resonator with fast response, and one or more optical gain elements that provide amplification of light to offset part of the losses of the resonator. The RFOG also includes one or more pump lasers to produce one or more pump beams for the gain elements in the resonator and control electronics configured to control the one or more pump lasers and the one or more variable optical attenuators, such that the round-trip loss of the resonator is a substantially constant, positive value.

摘要翻译： 一个实施例涉及一种谐振器光纤陀螺仪（RFOG）。 光纤谐振器包括光纤，抑制谐振器中的噪声光的一个或多个滤光器，可以快速响应地调节谐振器损耗的一个或多个可变光衰减器（VOA）以及一个或多个光增益 提供光的放大以偏移谐振器的损耗的一部分的元件。 RFOG还包括一个或多个泵浦激光器以产生用于谐振器中的增益元件的一个或多个泵浦光束，以及被配置为控制一个或多个泵激光器和一个或多个可变光衰减器的控制电子设备，使得往返 谐振器的损耗是基本恒定的正值。

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。