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：US20120224167A1

公开(公告)日：2012-09-06

申请号：US11779550

申请日：2007-07-18

申请人： Glen A. Sanders ,  David R. Koehler

发明人： Glen A. Sanders ,  David R. Koehler

IPC分类号： G01N21/17

CPC分类号： G01N21/7746 ,  G01N21/39 ,  G01N2021/7716 ,  G01N2021/7776 ,  G01N2021/7793 ,  G02B2006/12061 ,  G02B2006/12097 ,  G02B2006/12138

摘要： Apparatus and method for chemical, biological and radiological agent sensing. The sensing apparatus includes a plurality of resonators each having a resonance frequency and an optical fiber coil. The optical fiber coils have cladding and an indicator embedded in the cladding that reacts to an agent (chemical or biological substance) or a dopant that darkens with radiation. The resonator circulates light through the coil and produces a resonance shape centered at the resonance frequency and measured via the input light. A predetermined change in the resonance shape indicates a presence of the agent in the environment.

摘要翻译： 用于化学，生物和放射性物质感测的装置和方法。 感测装置包括各自具有共振频率的多个谐振器和光纤线圈。 光纤线圈具有包层和镶嵌在包层中的指示剂，其与试剂（化学或生物物质）或掺杂剂辐射而变暗。 谐振器通过线圈循环光，并产生以谐振频率为中心的谐振形状，并通过输入光测量。 共振形状的预定变化表示在环境中存在该试剂。

公开(公告)号：US08098380B2

公开(公告)日：2012-01-17

申请号：US12506855

申请日：2009-07-21

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： Multiple resonator fiber optic gyroscope (RFOG) configurations comprising one or more mode filters inside the resonator are adopted to effectively suppress unwanted high order spatial modes which can be a significant source of gyro bias errors. The resonator comprises at least a loop fiber, either two or more in/out coupling elements, and connectors that link elements into a circulating loop. Directional elements may be used to separate output light from input light in some of the embodiments. In all embodiments, mode filters are placed in the resonator to guarantee that the light reaching the photodetector is filtered by at least one mode filter in the resonator at least once. The mode filters may contain both spatial mode filters (such as single mode fibers or waveguides) and polarization mode filters (such as polarizing elements) so that both spatial and polarization mode filtering can be implemented simultaneously.

摘要翻译： 采用在谐振器内部包括一个或多个模式滤波器的多谐振器光纤陀螺仪（RFOG）配置来有效地抑制可能是陀螺仪偏置误差的重要来源的不期望的高阶空间模式。 谐振器包括至少一个环路光纤，两个或更多个输入/输出耦合元件，以及将元件链接到循环回路中的连接器。 在一些实施例中，定向元件可用于将输出光与输入光分离。 在所有实施例中，模式滤波器被放置在谐振器中，以保证到达光电检测器的光至少一个谐振器中的至少一个模式滤波器被滤波。 模式滤波器可以包含空间模式滤波器（例如单模光纤或波导）和偏振模式滤波器（例如偏振元件），使得可以同时实现空间和偏振模式滤波。

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：US08068233B2

公开(公告)日：2011-11-29

申请号：US12466140

申请日：2009-05-14

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

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

IPC分类号： G01B9/02

CPC分类号： G01C19/727

摘要： Substantially symmetric RFOG configurations for rotation rate sensing using two input/output coupling components. Configurations are disclosed where optical coupling components handles both input and output lightwaves. Reducing the number of input/output coupling components while maintaining a substantially symmetric configuration for the CW and CCW beam reduces losses, prevents realization of bias errors due to asymmetric light paths in the resonator, and produces better signal to noise performance. In addition, the invention discloses systems integrating multiple functions into compact micro-optic devices that are easier to fabricate and package, leading to compact RFOGs with reduced cost and improved manufacturability.

摘要翻译： 使用两个输入/输出耦合组件进行旋转速率感测的基本对称RFOG配置。 公开了光耦合部件处理输入和输出光波的配置。 降低输入/输出耦合分量的数量同时保持CW和CCW波束的基本对称的结构减少了损耗，防止了由于谐振器中的不对称光路导致的偏移误差的实现，并且产生更好的信噪比性能。 此外，本发明公开了将多种功能集成到紧凑型微型光学器件中的系统，其更容易制造和封装，从而导致紧凑型RFOG，其成本降​​低且可制造性提高。

公开(公告)号：US08031989B2

公开(公告)日：2011-10-04

申请号：US12212451

申请日：2008-09-17

申请人： Glen A. Sanders

发明人： Glen A. Sanders

IPC分类号： G02B6/00 ,  G02B6/34 ,  G01J1/04 ,  G01J1/42 ,  G01J5/08

CPC分类号： G01T1/20 ,  G01T7/00

摘要： Optical systems for sensing radiation emissions from radiological and nuclear matter. An example system includes a light source, a light sensor, a processing device in signal communication with the light source and the light sensor, and a fiber optic cable that receives light from the light source and delivers light to the light sensor. The fiber optic cable includes an optical fiber core region surrounded by a cladding region. The optical fiber is a single mode optical fiber having a mode field diameter greater than 25 μm. The optical fiber cladding region includes a plurality of lengthwise holes positioned to provide single mode light propagation properties. The plurality of lengthwise holes have a diameter between 0.1-5 μm.

摘要翻译： 用于感测辐射和核物质辐射辐射的光学系统。 示例性系统包括光源，光传感器，与光源和光传感器信号通信的处理设备，以及光纤电缆，其从光源接收光并将光传送到光传感器。 光纤电缆包括由包层区域包围的光纤芯区域。 光纤是模场直径大于25μm的单模光纤。 光纤包覆区域包括多个纵向孔，其设置为提供单模光传播特性。 多个纵向孔的直径在0.1-5μm之间。

公开(公告)号：US20110019198A1

公开(公告)日：2011-01-27

申请号：US12506855

申请日：2009-07-21

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： Multiple resonator fiber optic gyroscope (RFOG) configurations comprising one or more mode filters inside the resonator are adopted to effectively suppress unwanted high order spatial modes which can be a significant source of gyro bias errors. The resonator comprises at least a loop fiber, either two or more in/out coupling elements, and connectors that link elements into a circulating loop. Directional elements may be used to separate output light from input light in some of the embodiments. In all embodiments, mode filters are placed in the resonator to guarantee that the light reaching the photodetector is filtered by at least one mode filter in the resonator at least once. The mode filters may contain both spatial mode filters (such as single mode fibers or waveguides) and polarization mode filters (such as polarizing elements) so that both spatial and polarization mode filtering can be implemented simultaneously.

摘要翻译： 采用在谐振器内部包括一个或多个模式滤波器的多谐振器光纤陀螺仪（RFOG）配置来有效地抑制可能是陀螺仪偏置误差的重要来源的不期望的高阶空间模式。 谐振器包括至少一个环路光纤，两个或更多个输入/输出耦合元件，以及将元件链接到循环回路中的连接器。 在一些实施例中，定向元件可用于将输出光与输入光分离。 在所有实施例中，模式滤波器被放置在谐振器中，以保证到达光电检测器的光至少一个谐振器中的至少一个模式滤波器被滤波。 模式滤波器可以包含空间模式滤波器（例如单模光纤或波导）和偏振模式滤波器（例如偏振元件），使得可以同时实现空间和偏振模式滤波。

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：US07671325B2

公开(公告)日：2010-03-02

申请号：US11679498

申请日：2007-02-27

申请人： Glen A. Sanders ,  Stephen F. Yates ,  F. Stephen Lupton

发明人： Glen A. Sanders ,  Stephen F. Yates ,  F. Stephen Lupton

IPC分类号： G01J4/00 ,  G01N21/25

CPC分类号： G01N21/7746 ,  G01N21/39

摘要： A biological agent detector for detecting predetermined biological agents. The biological agent detector includes an optical fiber, a cladding that clads a length of the optical fiber and a bioindicator disposed within the cladding. The biological agent detector also includes a coherent light source that excites the optical fiber and a biological agent signature detector that detects the presence of a biological agent based upon a change in a resonance characteristic of the optical fiber caused by absorption of the predetermined biological agent into the cladding of the fiber.

摘要翻译： 用于检测预定生物制剂的生物试剂检测器。 生物剂检测器包括光纤，包围光纤长度的包层和设置在包层内的生物指示剂。 生物剂检测器还包括激发光纤的相干光源和基于由预定生物剂的吸收引起的光纤的谐振特性的变化来检测生物制剂的存在的生物体特征检测器 纤维的包层。

公开(公告)号：US20090324169A1

公开(公告)日：2009-12-31

申请号：US12163307

申请日：2008-06-27

申请人： Thien Dang ,  Glen A. Sanders ,  Tim Spicer

发明人： Thien Dang ,  Glen A. Sanders ,  Tim Spicer

IPC分类号： G02B6/32

CPC分类号： G02B6/2934 ,  G02B6/2804 ,  G02B6/322

摘要： A resonator sensing device having an optics coupler device for communicating light between light source(s) and sensor(s) and a hollow core fiber resonator. Light from one resonator fiber tip is coupled to a second resonator fiber tip via a graded index (GRIN) lens having the appropriate pitch such that the maximum coupling efficiency is achieved and having two angled surfaces. The angled surfaces are coated with an appropriate coating having a reflectance R in order to achieve the desired degree of coupling. Light reflected by the second angled surface is captured with another lens (such as a microlens) and coupled to a third fiber segment (coupled port). The optical parameters for the GRIN lens and the microlens are tailored to have the least loss.

摘要翻译： 一种谐振器感测装置，具有用于在光源和传感器之间传送光的光学耦合器装置和中空纤芯光纤谐振器。 来自一个谐振器光纤尖端的光通过具有适当间距的渐变折射率（GRIN）透镜耦合到第二谐振器光纤尖端，使得实现最大耦合效率并具有两个成角度的表面。 成角度的表面涂覆有具有反射率R的合适的涂层，以便达到所需的耦合度。 由第二倾斜表面反射的光被另一透镜（例如微透镜）捕获并耦合到第三光纤段（耦合端口）。 GRIN透镜和微透镜的光学参数被定制为具有最小的损耗。