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    Three-axis fiber optic vector magnetometer
    1.
    发明授权
    Three-axis fiber optic vector magnetometer 失效
    三轴光纤矢量磁强计

    公开(公告)号：US5243403A

    公开(公告)日：1993-09-07

    申请号：US767955

    申请日：1991-09-30

    申请人： Kee P. Koo ,  George H. Sigel, Jr. ,  Frank Bucholtz

    发明人： Kee P. Koo ,  George H. Sigel, Jr. ,  Frank Bucholtz

    IPC分类号： G01R33/02 ,  G01R33/032

    CPC分类号： G01R33/0327 ,  G01R33/0206

    摘要： A three-axis fiber optic vector magnetometer is provided for measuring bothhe direction and magnitude of a DC or low frequency magnetic field. The magnetometer includes an optical interferometer system including a sensing fiber arm disposed with three respective sensing portions perpendicular to one another and attached to a uni-directional sensor material. The interferometer system also includes a reference fiber arm and a laser light source for generating and introducing a laser light into both of the arms. Respective biasing devices generate a reference AC magnetic bias and a respective reference frequency in the three sensing portions. A detecting device detects a reference light signal from the reference fiber arm and the magnetically altered sensing light signal from the sensing fiber arm and forms an interferometer output signal. Respective separating devices then separate the respective magnetically induced interferometer signals at respective ones of the frequencies and produce a respective output signal indicative thereof. This output signal is thus indicative of the magnetic field strength in the respective direction and a vector sum of the strengths shows the magnetic field direction. Preferably, the sensor material is an annealed amorphous metallic glass strip and the separating means are lock-in amplifiers in their phase sensitive detection modes. The biasing devices are also preferably respective Helmholtz coils and a feedback system is provided for feeding back the output of the respective separating devices to the respective biasing devices.

    摘要翻译： 提供三轴光纤矢量磁强计用于测量直流或低频磁场的方向和幅度。 磁力计包括光学干涉仪系统，该光学干涉仪系统包括感测纤维臂，该感测纤维臂设置有彼此垂直的三个相应感测部分，并附接到单向传感器材料。 干涉仪系统还包括参考光纤臂和激光光源，用于产生并将激光引入到两个臂中。 相应的偏置装置在三个感测部分中产生参考AC磁偏置和相应的参考频率。 检测装置检测来自参考纤维臂的参考光信号和来自感测纤维臂的磁改变的感测光信号，并形成干涉仪输出信号。 然后，相应的分离装置在各个频率处分离相应的磁感应干涉仪信号，并产生指示其的相应输出信号。 因此，该输出信号表示各方向的磁场强度，强度的矢量和表示磁场方向。 优选地，传感器材料是退火的非晶金属玻璃带，分离装置是其相敏检测模式的锁定放大器。 偏置装置还优选地是相应的亥姆霍兹线圈，并且提供反馈系统用于将各个分离装置的输出反馈到相应的偏置装置。

    Fiber optic magnetometer for detecting DC magnetic fields
    2.
    发明授权
    Fiber optic magnetometer for detecting DC magnetic fields 失效
    用于检测直流磁场的光纤磁力计

    公开(公告)号：US4600885A

    公开(公告)日：1986-07-15

    申请号：US610463

    申请日：1984-05-15

    申请人： Kee P. Koo ,  Anthony Dandridge ,  Alan B. Tveten ,  George H. Sigel, Jr.

    发明人： Kee P. Koo ,  Anthony Dandridge ,  Alan B. Tveten ,  George H. Sigel, Jr.

    IPC分类号： G01R33/032 ,  G01R33/02

    CPC分类号： G01R33/0327

    摘要： A fiber optic magnetometer for detecting DC magnetic fields includes a first optical fiber having a magnetostrictive jacket thereon which defines a sensing arm, and a second fiber defining a reference arm. An AC magnetic field of frequency .omega..sub.o and constant amplitude is imposed on the magnetostrictive jacket so as to cause a time varying optical path length change, having an .omega..sub.o component, in the sensing arm fiber. This induces a corresponding time varying phase shift, also having an .omega..sub.o component, in light transmitted through the sensing arm fiber which is detected by a phase detector. The phase detector produces a signal proportional to the phase shift, this signal being passed to a lock-in amplifier set to amplify at .omega..sub.o. The lock-in amplifier produces an output signal proportional to the amplitude of the .omega..sub.o component, wherein this amplitude is proportional to any DC magnetic fields to which the device is exposed.

    摘要翻译： 用于检测直流磁场的光纤磁力计包括：第一光纤，其上具有限定感测臂的磁致伸缩护套，以及限定参考臂的第二光纤。 在磁致伸缩套管上施加频率ωo和恒定幅度的交流磁场，从而在感测臂光纤中产生具有ωo分量的时变光程长度变化。 这通过相位检测器检测到的通过感测臂光纤传输的光在同一时间变化的相移中也产生ωω分量。 相位检测器产生与相移成比例的信号，该信号被传递到锁定放大器，以在ωo上放大。 锁定放大器产生与ωo分量的幅度成比例的输出信号，其中该幅度与装置所暴露的任何DC磁场成比例。

    Fiber optic DC magnetometer without hysteresis ambiguity
    3.
    发明授权
    Fiber optic DC magnetometer without hysteresis ambiguity 失效
    光纤直流磁力计无迟滞模糊

    公开(公告)号：US4603296A

    公开(公告)日：1986-07-29

    申请号：US610460

    申请日：1984-05-15

    申请人： Kee P. Koo ,  George H. Sigel, Jr.

    发明人： Kee P. Koo ,  George H. Sigel, Jr.

    IPC分类号： G01R33/032 ,  G01B9/02 ,  G02F1/29

    CPC分类号： G01R33/0327

    摘要： A fiber optic magnetometer for detecting DC magnetic fields includes a first optical fiber having a magnetostrictive jacket thereon which defines a sensing arm, and a second fiber defining a reference arm. A first AC magnetic field of frequency .omega..sub.o and a second AC field of frequency .omega..sub.s are imposed on the magnetostrictive jacket so as to cause a time varying optical path length change, having .omega..sub.o, (.omega..sub.o +.omega..sub.s), and (.omega..sub.o -.omega..sub.s) components in the sensing arm fiber. This induces a corresponding time varying phase shift, also having the above components, in light transmitted through the sensing arm fiber which is detected by a phase detector. The phase detector produces a signal proportional to the phase shift, this signal being passed to a lock-in amplifier set to amplify at .omega..sub.o. .omega..sub.s is sufficiently small such that the lock-in amplifier filters all components other than the .omega..sub.o, (.omega..sub.o +.omega..sub.s), and (.omega..sub.o -.omega..sub.s) components. The sum of these components changes in magnitude upon exposure of the magnetostrictive jacket to a DC field, thereby indicating the presence of a DC field. The lock-in amplifier output is plotted on an oscilloscope versus the second AC field of frequency .omega..sub.s to give a loop which shifts in position when the device is exposed to an external DC field.

    摘要翻译： 用于检测直流磁场的光纤磁力计包括：第一光纤，其上具有限定感测臂的磁致伸缩护套，以及限定参考臂的第二光纤。 频率ωo的第一交流磁场和频率ω的第二AC场被施加在磁致伸缩套上，以便引起时变光路长度变化，具有ωω（ωω+ω）和ω 感测臂光纤中的零件。 这通过由相位检测器检测到的感测臂光纤透射的光在同样具有上述分量的情况下引起相应的时变相移。 相位检测器产生与相移成比例的信号，该信号被传递到锁定放大器，以在ωo上放大。 ωω足够小，使得锁定放大器滤除除ω，ω（ωω+ω）和（ωωω）分量之外的所有成分。 这些组件的总和在磁致伸缩套管暴露于DC场时的幅度发生变化，从而指示存在DC场。 锁定放大器输出绘制在示波器上，而不是频率ω的第二个AC场，以便当器件暴露于外部DC场时产生位移偏移的环路。

    Fiber-optic magnetic gradiometer with variable magnetic biasing fields
    4.
    发明授权
    Fiber-optic magnetic gradiometer with variable magnetic biasing fields 失效
    具有可变磁偏置场的光纤磁梯度计

    公开(公告)号：US4591786A

    公开(公告)日：1986-05-27

    申请号：US641656

    申请日：1984-08-17

    申请人： Kee P. Koo ,  George H. Sigel, Jr.

    发明人： Kee P. Koo ,  George H. Sigel, Jr.

    IPC分类号： G01R33/022 ,  G01R33/032 ,  G01B9/02

    CPC分类号： G01R33/0327 ,  G01R33/022

    摘要： A fiber optic magnetic gradiometer for measuring both ac and dc magnetic field gradients. The gradiometer utilizes an optical interferometer with magnetostrictive magnetic field sensing elements in each of the interferometer arms. Ac and dc magnetic field biasing is achieved by disposing each of the magnetic field sensing elements within its own magnetic field coil and utilizing a variable dc current source for applying dc current to each magnetic coil. An ac current source at frequency w.sub.o connected across the circuits for the dc current sources is used in conjunction with a variable attenuator to control the ac bias to the respective magnetic coils. The detected output from the interferometer is processed either by bandpass filters or a spectrum analyzer to obtain the signal component at w.sub.o, which is proportional to the external dc gradient magnetic field, and at w.sub.o +w.sub.s, (where w.sub.s is external ac magnetic field frequency), which is proportional to the external ac magnetic field gradient.

    摘要翻译： 用于测量交流和直流磁场梯度的光纤磁梯度计。 梯度计利用在每个干涉仪臂中具有磁致伸缩磁场感测元件的光学干涉仪。 通过将每个磁场感测元件设置在其自身的磁场线圈内并利用可变直流电流源来施加直流电流到每个电磁线圈来实现ac和dc磁场偏置。 连接在直流电流源的电路两端的交流电源与可变衰减器一起使用，以控制对各个磁性线圈的交流偏压。 来自干涉仪的检测输出通过带通滤波器或频谱分析仪进行处理，以获得与外部直流梯度磁场成比例的wo处的信号分量，并且在wo + ws（其中ws是外部交流磁场频率 ），其与外部交流磁场梯度成比例。

    Optical glass fibers, apparatus and preparation using reactive vapor transport and deposition
    5.
    依法登记的发明
    Optical glass fibers, apparatus and preparation using reactive vapor transport and deposition 失效
    光学玻璃纤维，使用反应蒸气传输和沉积的设备和制备

    公开(公告)号：USH1754H

    公开(公告)日：1998-10-06

    申请号：US825713

    申请日：1985-12-13

    申请人： Danh C. Tran ,  George H. Sigel, Jr.

    发明人： Danh C. Tran ,  George H. Sigel, Jr.

    IPC分类号： C03B19/04

    CPC分类号： C03B19/04

    摘要： A new method for preparing low loss multimode and monomode glass optical fibers which avoids casting or pouring the core and clad melts is disclosed. The new technique is based on a reactive-gas-transport approach which avoids contamination from absorbing impurities and scattering centers by reacting the glass melt with reactive gases which remove impurities and increase the refractive index of the fiber.

    摘要翻译： 公开了一种用于制备低损耗多模和单模玻璃光纤的新方法，其避免铸造或浇注芯和包层熔体。 新技术基于反应气体输送方法，其避免了通过使玻璃熔体与消除杂质并增加纤维的折射率的反应性气体反应而吸收杂质和散射中心的污染。

    Fiber optical magnetic field sensor using magnetostrictive material
    6.
    发明授权
    Fiber optical magnetic field sensor using magnetostrictive material 失效
    使用磁致伸缩材料的光纤光磁传感器

    公开(公告)号：US4376248A

    公开(公告)日：1983-03-08

    申请号：US241290

    申请日：1981-03-06

    申请人： Thomas G. Giallorenzi ,  George H. Sigel, Jr.

    发明人： Thomas G. Giallorenzi ,  George H. Sigel, Jr.

    IPC分类号： G01R33/02 ,  G01R33/032 ,  G02F1/01 ,  G02B5/14

    CPC分类号： G01R33/02 ,  G01R33/0327 ,  G02F1/0134

    摘要： A sensing element of magnetostrictive material associated with an optical fiber of an interferometer arm defining apparatus for detecting magnetic fields. The magnetostrictive material is adhered in close co-extensive adjacency with the optical fiber and in the presence of a magnetic field undergoes responsive longitudinal dimension changes which strains the optical fiber and induces a strain related phase shift in an optically propagating beam in the fiber detectable by interferometry.

    摘要翻译： 与用于检测磁场的干涉仪臂定义装置的光纤相关联的磁致伸缩材料的感测元件。 磁致伸缩材料与光纤紧密地相邻地附着，并且在存在磁场的情况下经历响应的纵向尺寸变化，其使光纤变形并且在纤维中的光学传播光束中引起应变相移相移，可由 干涉测量。

    Use of glass fiber materials in diagnosing and preventing radon infiltration into buildings
    7.
    发明授权
    Use of glass fiber materials in diagnosing and preventing radon infiltration into buildings 有权
    使用玻璃纤维材料诊断和防止氡气渗入建筑物

    公开(公告)号：US6036753A

    公开(公告)日：2000-03-14

    申请号：US136504

    申请日：1998-08-19

    申请人： Alan Appleby ,  George H. Sigel, Jr. ,  Il Sik Kim

    发明人： Alan Appleby ,  George H. Sigel, Jr. ,  Il Sik Kim

    IPC分类号： B01D53/04

    CPC分类号： B01D53/04 ,  B01D2256/18 ,  B01D2259/4583

    摘要： A method and apparatus for testing and remediating the effects of radon infiltration in buildings. The method of this invention places fiber glass materials over radon-emitting surfaces in order to entrap radon and radon progeny. The fiber glass materials can be formed into mats having a packed geometry. Each mat has fiber bundles having several thousand individual fibers. Each fiber has an approximate diameter size of about 50 microns. The glass fiber consists of a silicon oxide glass that may be doped, for example, with trivalent cerium ions. The mats can be of any geometrical configuration, such as rectangular.

    摘要翻译： 用于测试和修复建筑物氡渗透影响的方法和装置。 本发明的方法将玻璃纤维材料放置在氡发射表面上，以便捕获氡和氡的后代。 玻璃纤维材料可以形成具有包装几何形状的垫子。 每个垫子具有具有数千个单独纤维的纤维束。 每个纤维的大约直径尺寸约为50微米。 玻璃纤维由氧化硅玻璃组成，其可以掺杂有例如三价铈离子。 垫可以是任何几何构造，例如矩形。

    Radiation hardness of optical fibers
    8.
    发明授权
    Radiation hardness of optical fibers 失效
    光纤的辐射硬度

    公开(公告)号：US4182664A

    公开(公告)日：1980-01-08

    申请号：US802745

    申请日：1977-06-02

    申请人： Mokhtar S. Maklad ,  George H. Sigel, Jr. ,  Gary W. Bickel

    发明人： Mokhtar S. Maklad ,  George H. Sigel, Jr. ,  Gary W. Bickel

    IPC分类号： C03B37/14 ,  G02B6/02 ,  B01J1/10

    CPC分类号： C03B37/14 ,  G02B6/02 ,  Y02P40/57

    摘要： Optical fibers of silica and plastic composition are rendered relatively stable to nuclear radiation induced optical losses by preirradiating with a high initial radiation dosage. Subsequent exposure of the radiation hardended fibers produce substantially lower radiation induced optical loss and faster fiber transmission recovery rates.

    摘要翻译： 二氧化硅和塑料组合物的光纤通过预辐射具有较高的初始辐射剂量使其对核辐射诱导的光学损耗相对稳定。 辐射硬化纤维的后续曝光产生显着降低的辐射诱导的光学损耗和更快的光纤传输恢复速率。