公开(公告)号：US20100033729A1

公开(公告)日：2010-02-11

申请号：US12187932

申请日：2008-08-07

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

IPC分类号： G01C19/72 ,  G06G7/48

CPC分类号： G01C19/64

摘要： A computer-implementable method of reducing bias instability in a fiber optic gyroscope includes receiving, with a computer, a first data set enabling the computer to generate a model of the gyroscope, including a light source, a photodetector, and a plurality of optical components and fiber sections coupling the light source to the photodetector, and a light signal to be propagated from the light source to the photodetector. The light signal has an associated wavelength spectrum. For each wavelength of the spectrum, the relative lightwave intensity reaching the photodetector is calculated. A signal-wave intensity and a spurious-wave intensity are determined from the calculated relative lightwave intensities. A scale factor is determined from the signal-wave intensity. The spurious-wave intensity is integrated over the wavelength spectrum of the light source to obtain a total spurious-wave intensity. A rate bias error is determined based on the total spurious-wave intensity and the scale factor.

摘要翻译： 一种降低光纤陀螺仪中的偏压不稳定性的计算机可实现的方法包括：利用计算机接收第一数据组，使得该计算机能够生成陀螺仪的模型，该模型包括光源，光电检测器和多个光学部件 以及将光源耦合到光电检测器的光纤部分，以及从光源传播到光电检测器的光信号。 光信号具有相关的波长谱。 对于光谱的每个波长，计算到达光电检测器的相对光波强度。 从计算的相对光波强度确定信号波强度和寄生波强度。 从信号波强度确定比例因子。 寄生波强度集成在光源的波长光谱上，以获得总的杂散波强度。 基于总杂散波强度和比例因子确定速率偏差误差。

公开(公告)号：US20100316332A1

公开(公告)日：2010-12-16

申请号：US12848592

申请日：2010-08-02

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

IPC分类号： G02B6/26 ,  G01C19/72

CPC分类号： G01C19/64

摘要： Apparatus for providing Bias-Instability reduction in Fiber Optic Gyroscopes are provided. In one embodiment, an optical circuit for a fiber optic gyroscope having a broadband light source and an optical fiber loop comprises: a PM fiber of length v; an IOC coupled to the PM fiber via a pigtail of length d1, a second pigtail with length of d2, and a third pigtail with length of d3; a splitter that splits light received from the first pigtail into a first and second beams directed to the second and third pigtails; and a depolarizer circuit coupled to said fiber loop including a first fiber section of length x, a second fiber section of length z, a third fiber section of length w and a fourth fiber section of length y; and wherein the lengths of v, x, y, d1 and d3 are proportioned to avoid regions of high bias instability.

摘要翻译： 提供了用于在光纤陀螺仪中提供偏压不均匀性的设备。 在一个实施例中，用于具有宽带光源和光纤回路的光纤陀螺仪的光学电路包括：长度为v的PM光纤; 通过长度为d1的尾纤和长度为d2的第二尾纤和长度为d3的第三尾纤耦合到PM光纤的IOC; 分离器，其将从所述第一尾纤接收的光分成指向所述第二和第三尾纤的第一和第二光束; 以及耦合到所述光纤回路的消偏振器电路，包括长度为x的第一光纤部分，长度为z的第二光纤部分，长度为w的第三光纤部分和长度为y的第四光纤部分; 并且其中v，x，y，d1和d3的长度成比例，以避免高偏压不稳定性的区域。

公开(公告)号：US07894073B2

公开(公告)日：2011-02-22

申请号：US12848592

申请日：2010-08-02

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

IPC分类号： G01C19/72

CPC分类号： G01C19/64

摘要： Apparatus for providing Bias-Instability reduction in Fiber Optic Gyroscopes are provided. In one embodiment, an optical circuit for a fiber optic gyroscope having a broadband light source and an optical fiber loop comprises: a PM fiber of length v; an IOC coupled to the PM fiber via a pigtail of length d1, a second pigtail with length of d2, and a third pigtail with length of d3; a splitter that splits light received from the first pigtail into a first and second beams directed to the second and third pigtails; and a depolarizer circuit coupled to said fiber loop including a first fiber section of length x, a second fiber section of length z, a third fiber section of length w and a fourth fiber section of length y; and wherein the lengths of v, x, y, d1 and d3 are proportioned to avoid regions of high bias instability.

摘要翻译： 提供了用于在光纤陀螺仪中提供偏压不均匀性的设备。 在一个实施例中，用于具有宽带光源和光纤回路的光纤陀螺仪的光学电路包括：长度为v的PM光纤; 通过长度为d1的尾纤和长度为d2的第二尾纤和长度为d3的第三尾纤耦合到PM光纤的IOC; 分离器，其将从所述第一尾纤接收的光分成指向所述第二和第三尾纤的第一和第二光束; 以及耦合到所述光纤回路的消偏振器电路，包括长度为x的第一光纤部分，长度为z的第二光纤部分，长度为w的第三光纤部分和长度为y的第四光纤部分; 并且其中v，x，y，d1和d3的长度成比例，以避免高偏压不稳定性的区域。

公开(公告)号：US07777889B2

公开(公告)日：2010-08-17

申请号：US12187932

申请日：2008-08-07

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Mosor ,  Glen A. Sanders

IPC分类号： G01C19/72

CPC分类号： G01C19/64

摘要： A computer-implementable method of reducing bias instability in a fiber optic gyroscope includes receiving, with a computer, a first data set enabling the computer to generate a model of the gyroscope, including a light source, a photodetector, and a plurality of optical components and fiber sections coupling the light source to the photodetector, and a light signal to be propagated from the light source to the photodetector. The light signal has an associated wavelength spectrum. For each wavelength of the spectrum, the relative lightwave intensity reaching the photodetector is calculated. A signal-wave intensity and a spurious-wave intensity are determined from the calculated relative lightwave intensities. A scale factor is determined from the signal-wave intensity. The spurious-wave intensity is integrated over the wavelength spectrum of the light source to obtain a total spurious-wave intensity. A rate bias error is determined based on the total spurious-wave intensity and the scale factor.

摘要翻译： 一种降低光纤陀螺仪中的偏压不稳定性的计算机可实现的方法包括：利用计算机接收第一数据组，使得该计算机能够生成陀螺仪的模型，该模型包括光源，光电检测器和多个光学部件 以及将光源耦合到光电检测器的光纤部分，以及从光源传播到光电检测器的光信号。 光信号具有相关的波长谱。 对于光谱的每个波长，计算到达光电检测器的相对光波强度。 从计算的相对光波强度确定信号波强度和寄生波强度。 从信号波强度确定比例因子。 寄生波强度集成在光源的波长光谱上，以获得总的杂散波强度。 基于总杂散波强度和比例因子确定速率偏差误差。

公开(公告)号：US20130044328A1

公开(公告)日：2013-02-21

申请号：US13211658

申请日：2011-08-17

申请人： Steven J. Sanders ,  Jeffrey E. Lewis ,  Sorin Mosor ,  David A. Doheny ,  Norman Gerard Tarleton ,  Austin Taranta

发明人： Steven J. Sanders ,  Jeffrey E. Lewis ,  Sorin Mosor ,  David A. Doheny ,  Norman Gerard Tarleton ,  Austin Taranta

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： Systems and methods for environmentally insensitive high-performance fiber-optic gyroscopes are provided. In one embodiment, a loop closure electronics apparatus for a fiber optic gyroscope having an optical phase modulator characterized by a transfer function that includes an error component of at least second order is provided. The apparatus comprises: a first digital circuit that generates a digital bias modulation signal; a second digital circuit that generates a digital feedback signal; at least one digital-to-analog converter that produces an electrical signal that drives the phase modulator from the digital bias modulation signal and the digital feedback signal; and a compensator that includes an analog filter of at least second order and a digital filter of at least second order, wherein the analog filter and the digital filter pre-filter the electrical signal to compensate for the error component.

摘要翻译： 提供了环境不敏感的高性能光纤陀螺仪的系统和方法。 在一个实施例中，提供了一种用于光纤陀螺仪的闭环电子装置，其具有光学相位调制器，其特征在于包括至少二阶的误差分量的传递函数。 该装置包括：产生数字偏置调制信号的第一数字电路; 产生数字反馈信号的第二数字电路; 至少一个数模转换器，其产生从所述数字偏置调制信号和所述数字反馈信号驱动所述相位调制器的电信号; 以及补偿器，其包括至少二阶的模拟滤波器和至少二阶的数字滤波器，其中所述模拟滤波器和所述数字滤波器对所述电信号进行预滤波以补偿所述误差分量。

公开(公告)号：US08717575B2

公开(公告)日：2014-05-06

申请号：US13211658

申请日：2011-08-17

申请人： Steven J. Sanders ,  Jeffrey E. Lewis ,  Sorin Mosor ,  David A. Doheny ,  Norman Gerard Tarleton ,  Austin Taranta

发明人： Steven J. Sanders ,  Jeffrey E. Lewis ,  Sorin Mosor ,  David A. Doheny ,  Norman Gerard Tarleton ,  Austin Taranta

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： Systems and methods for environmentally insensitive high-performance fiber-optic gyroscopes are provided. In one embodiment, a loop closure electronics apparatus for a fiber optic gyroscope having an optical phase modulator characterized by a transfer function that includes an error component of at least second order is provided. The apparatus comprises: a first digital circuit that generates a digital bias modulation signal; a second digital circuit that generates a digital feedback signal; at least one digital-to-analog converter that produces an electrical signal that drives the phase modulator from the digital bias modulation signal and the digital feedback signal; and a compensator that includes an analog filter of at least second order and a digital filter of at least second order, wherein the analog filter and the digital filter pre-filter the electrical signal to compensate for the error component.

摘要翻译： 提供了环境不敏感的高性能光纤陀螺仪的系统和方法。 在一个实施例中，提供了一种用于光纤陀螺仪的闭环电子装置，其具有光学相位调制器，其特征在于包括至少二阶的误差分量的传递函数。 该装置包括：产生数字偏置调制信号的第一数字电路; 产生数字反馈信号的第二数字电路; 至少一个数模转换器，其产生从所述数字偏置调制信号和所述数字反馈信号驱动所述相位调制器的电信号; 以及补偿器，其包括至少二阶的模拟滤波器和至少二阶的数字滤波器，其中所述模拟滤波器和所述数字滤波器对所述电信号进行预滤波以补偿所述误差分量。

公开(公告)号：US20100073681A1

公开(公告)日：2010-03-25

申请号：US12236644

申请日：2008-09-24

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Moser

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Moser

IPC分类号： G01C19/72

CPC分类号： G01C19/721 ,  G02B6/105

摘要： A fiber optic gyroscope includes a light source, a coupler coupled to the light source, a photodetector coupled to the coupler, an integrated optic circuit (IOC) coupled to the coupler by a first element, and a sensing loop coupled to the IOC by second and third elements. At least one of the first, second and third elements includes a polarizing element.

摘要翻译： 光纤陀螺仪包括光源，耦合到光源的耦合器，耦合到耦合器的光电检测器，由第一元件耦合到耦合器的集成光电路（IOC）以及通过第二元件耦合到IOC的感测回路 和第三要素。 第一，第二和第三元件中的至少一个包括偏振元件。

公开(公告)号：US08208503B2

公开(公告)日：2012-06-26

申请号：US12787935

申请日：2010-05-26

申请人： Tiequn Qiu ,  Steven J. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders

IPC分类号： H01S3/30

CPC分类号： G01C19/721

摘要： A broadband light source configured to emit a stable broadband optical beam is provided. The broadband light source includes at least one optical pump source, an optical system including a polarization beam combiner, and a solid state laser medium. The optical system is configured to receive at least one optical pump beam from a respective one of the at least one optical pump source. The solid state laser medium receives a substantially unpolarized pump beam from a first output of the optical system. Stable broadband amplified spontaneous emission is output from a second output of the optical system.

摘要翻译： 提供了配置成发射稳定宽带光束的宽带光源。 宽带光源包括至少一个光泵浦源，包括偏振光束组合器的光学系统和固态激光介质。 光学系统被配置为从至少一个光泵浦源中的相应一个接收至少一个光泵浦光束。 固态激光介质从光学系统的第一输出接收基本上非偏振的泵浦光束。 从光学系统的第二输出端输出稳定的宽带放大自发辐射。

公开(公告)号：US20110292951A1

公开(公告)日：2011-12-01

申请号：US12787935

申请日：2010-05-26

申请人： Tiequn Qiu ,  Steven J. Sanders

发明人： Tiequn Qiu ,  Steven J. Sanders

IPC分类号： H01S3/067 ,  H01S3/13

CPC分类号： G01C19/721

摘要： A broadband light source configured to emit a stable broadband optical beam is provided. The broadband light source includes at least one optical pump source, an optical system including a polarization beam combiner, and a solid state laser medium. The optical system is configured to receive at least one optical pump beam from a respective one of the at least one optical pump source. The solid state laser medium receives a substantially unpolarized pump beam from a first output of the optical system. Stable broadband amplified spontaneous emission is output from a second output of the optical system.

摘要翻译： 提供了配置成发射稳定宽带光束的宽带光源。 宽带光源包括至少一个光泵浦源，包括偏振光束组合器的光学系统和固态激光介质。 光学系统被配置为从至少一个光泵浦源中的相应一个接收至少一个光泵浦光束。 固态激光介质从光学系统的第一输出接收基本上非偏振的泵浦光束。 从光学系统的第二输出端输出稳定的宽带放大自发辐射。

公开(公告)号：US07973938B2

公开(公告)日：2011-07-05

申请号：US12236644

申请日：2008-09-24

申请人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Moser

发明人： Tiequn Qiu ,  Steven J. Sanders ,  Sorin Moser

IPC分类号： G01C19/72

CPC分类号： G01C19/721 ,  G02B6/105

摘要： A fiber optic gyroscope includes a light source, a coupler coupled to the light source, a photodetector coupled to the coupler, an integrated optic circuit (IOC) coupled to the coupler by a first element, and a sensing loop coupled to the IOC by second and third elements. At least one of the first, second and third elements includes a polarizing element.

摘要翻译： 光纤陀螺仪包括光源，耦合到光源的耦合器，耦合到耦合器的光电检测器，由第一元件耦合到耦合器的集成光电路（IOC）以及通过第二元件耦合到IOC的感测回路 和第三要素。 第一，第二和第三元件中的至少一个包括偏振元件。