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。

公开(公告)号：US20090296098A1

公开(公告)日：2009-12-03

申请号：US12130662

申请日：2008-05-30

申请人： Glen A. Sanders ,  Andrew Kaliszek ,  Thien Dang

发明人： Glen A. Sanders ,  Andrew Kaliszek ,  Thien Dang

IPC分类号： G01C19/72

CPC分类号： G01C19/722 ,  G01C19/727 ,  G02B6/4207

摘要： An optical coupling device for connecting hollow core optical fiber coils in a fiber optic gyro system. An example fiber optic gyro system includes a recirculator or an integrated optics chip, a fiber coil of hollow core optical fiber with first and second ends, and a coupling device that holds an end of the hollow core optical fiber in an enclosed cavity at some predefined distance from the recirculator or integrated optics chip. The coupling device includes a housing for rigidly holding the fiber end in position. The housing includes a cavity that receives the fiber end.

摘要翻译： 一种用于在光纤陀螺仪系统中连接中空纤芯光纤线圈的光耦合装置。 示例性光纤陀螺仪系统包括再循环器或集成光学芯片，具有第一和第二端的中空纤芯光纤的光纤线圈，以及耦合器件，其将中空芯光纤的端部保持在封闭空腔中， 距离再循环器或集成光学芯片的距离。 联接装置包括用于将纤维端刚性保持就位的壳体。 壳体包括容纳纤维端部的空腔。

公开(公告)号：US07463360B2

公开(公告)日：2008-12-09

申请号：US11406939

申请日：2006-04-18

申请人： Grenville Hughes ,  Glen A. Sanders ,  Lee K. Strandjord

发明人： Grenville Hughes ,  Glen A. Sanders ,  Lee K. Strandjord

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： Methods and apparatus are provided for determining the rotational rate of an optical gyro. An optical gyro comprises at least one substrate, a multi-frequency light source (MFLS) mounted on the substrate, and a resonator coupled to the MFLS. The MFLS is configured to produce a first light beam having a first frequency and a second light beam having a second frequency and phase locked with the first light beam. The resonator comprises an optical fiber coil having a hollow core. The resonator is configured to circulate a portion of each of the first and second light beams through the hollow core. The portion of the first light beam propagates in a first counter-propagating direction, and the portion of the second light beam propagates in a second counter-propagating direction. A measured difference between the first and second frequencies indicates a frequency shift proportional to the rotation rate of the optical gyro.

摘要翻译： 提供了用于确定光学陀螺仪的旋转速率的方法和装置。 光学陀螺仪包括至少一个衬底，安装在衬底上的多频光源（MFLS）和耦合到MFLS的谐振器。 MFLS被配置为产生具有第一频率的第一光束和具有第二频率并与第一光束锁相的第二光束。 谐振器包括具有中空芯的光纤线圈。 谐振器被配置为使第一和第二光束中的每一个的一部分循环通过中空芯。 第一光束的部分以第一反向传播方向传播，并且第二光束的部分在第二反向传播方向上传播。 第一和第二频率之间的测量差表示与光学陀螺仪的旋转速率成比例的频移。

公开(公告)号：US20080137091A1

公开(公告)日：2008-06-12

申请号：US11342158

申请日：2006-01-27

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

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

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： Apparatus is provided for a fiber optic gyro. The fiber optic gyro includes a ring resonator having first and second counter-propagating directions. The ring resonator includes a coil having an axis and an optical fiber having a hollow core. The ring resonator is configured to produce a first resonance frequency when a first light beam circulates through the hollow core in the first counter-propagating direction and produce a second resonance frequency when a second light beam circulates through the hollow core in the second counter-propagating direction. A difference between the resonance frequencies indicates a rotation rate of the fiber optic gyro about the axis.

摘要翻译： 为光纤陀螺提供设备。 光纤陀螺仪包括具有第一和第二反向传播方向的环形谐振器。 环形谐振器包括具有轴的线圈和具有中空芯的光纤。 环形谐振器被配置为当第一光束在第一反向传播方向上循环通过中空芯时产生第一谐振频率，并且当第二光束在第二反向传播方向上通过中空芯线循环时产生第二共振频率 方向。 谐振频率之间的差异表示光纤陀螺绕轴线的旋转速率。

公开(公告)号：US07382945B1

公开(公告)日：2008-06-03

申请号：US11733664

申请日：2007-04-10

申请人： Glen A. Sanders

发明人： Glen A. Sanders

IPC分类号： G02B6/00

CPC分类号： G01T1/20 ,  G01T7/00

摘要： Systems and methods for measuring a target radiation substance using a fiber-optic sensor. An ample method includes activating the sensor at a first power level, measuring light at a photo sensor, increasing power to a second power level, if the measured light indicates possible presence of the target radiation substance, measuring light at the photo sensor after the increase in power, and outputting an error signal, if the target radiation type was not detected based on the measured light signatures. The first power level is typically between 1-1000 μWatts and the second power level is typically between 100-10000 μWatts. In a further confirmation, the power is decreased to approximately the first power level, if the error signal is not outputted.

摘要翻译： 使用光纤传感器测量目标辐射物质的系统和方法。 一种广泛的方法包括：在第一功率水平下激活传感器，测量光传感器上的光，将功率增加到第二功率水平，如果所测量的光指示目标辐射物质的可能存在，则在增加之后测量光传感器处的光 如果没有基于测量的光签名检测到目标辐射类型，则输出误差信号。 第一功率水平通常在1-1000瓦特之间，而第二功率水平通常在100-10000瓦特之间。 在进一步的确认中，如果不输出误差信号，则功率降低到大约第一功率电平。

公开(公告)号：US20080116361A1

公开(公告)日：2008-05-22

申请号：US11600386

申请日：2006-11-16

申请人： Glen A. Sanders ,  Chellappan Narayanan

发明人： Glen A. Sanders ,  Chellappan Narayanan

IPC分类号： G01N21/75

CPC分类号： G01N21/7746 ,  G01D5/35345 ,  G01N2021/7716 ,  G01N2201/0612 ,  G01N2201/088 ,  G02B6/2934

摘要： Apparatus and method are provided for chemical and biological agent sensing. The sensing apparatus includes a resonator having a resonance frequency and one or more optical fiber coils. The optical fiber coil has a permeable cladding and an indicator embedded in the cladding that reacts to an agent (e.g., a chemical or biological substance). 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： 提供了用于化学和生物试剂感测的装置和方法。 感测装置包括具有共振频率的谐振器和一个或多个光纤线圈。 光纤线圈具有可渗透的包层和嵌入包层中的与试剂（例如化学或生物物质）反应的指示剂。 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。