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公开(公告)号：US5047626A
公开(公告)日：1991-09-10
申请号：US460435
申请日：1990-01-03
Applicant: Lloyd C. Bobb , Barbara J. White , Jon P. Davis
Inventor： Lloyd C. Bobb , Barbara J. White , Jon P. Davis
CPC classification number: G01N25/18 , G01M11/331 , G01N21/45 , G01J2009/0226 , G01J2009/0288
Abstract: A physical property of a liquid or of any optical fiber is measured using optical fiber interferometer. A conductive material is disposed upon the surface of a region of a light transmitting optical fiber and the region having the conductive material is disposed in the liquid. Light energy is applied to one end of the fiber and transmitted light is received at the other end of the fiber. Electrical energy is applied to the conductive material disposed upon the surface of the fiber to heat the region of the fiber and cause a change in the optical path length of the light transmitted through the fiber. The physical property of the liquid or optical fiber is determined in accordance with the change in the optical path length of the received light caused by applying the electrical energy to the conductive material. A series of short energy pulses is provided and the average phase change is determined. The conductive material is gold and it encircles the fiber. The gold may be disposed on the jacket of the fiber or the jacket may be removed before disposing the gold.
Abstract translation: 使用光纤干涉仪测量液体或任何光纤的物理性质。 导电材料设置在透光光纤的区域的表面上，并且具有导电材料的区域设置在液体中。 光能被施加到光纤的一端，透射光被接收在光纤的另一端。 将电能施加到设置在光纤表面上的导电材料，以加热光纤的区域并引起透过光纤的光的光程长度的变化。 根据通过将电能施加到导电材料而引起的接收光的光路长度的变化来确定液体或光纤的物理性质。 提供一系列短能脉冲，并确定平均相变。 导电材料是金，它包围纤维。 金可以设置在纤维的护套上，或者在处理金之前可以去除护套。
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公开(公告)号：US4859059A
公开(公告)日：1989-08-22
申请号：US145020
申请日：1988-01-13
Applicant: Lloyd C. Bobb , Barbara J. White , Jon P. Davis
Inventor： Lloyd C. Bobb , Barbara J. White , Jon P. Davis
CPC classification number: G02F1/011 , G02F1/2252
Abstract: The phase of light passing through an optical waveguide is modulated by aying electric current to heat the waveguide and thereby alter the length and refractive index thereof. An application for the thermal phase modulation concept is provided in a Mach-Zehnder interferometer.
Abstract translation: 通过施加电流来加热波导并因此改变其长度和折射率来调制通过光波导的光的相位。 在Mach-Zehnder干涉仪中提供了用于热相位调制概念的应用。
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公开(公告)号：US4644273A
公开(公告)日：1987-02-17
申请号：US750970
申请日：1985-07-02
Applicant: Lloyd C. Bobb
Inventor： Lloyd C. Bobb
IPC: G01R33/022 , G01R33/032 , G01R33/02
CPC classification number: G01R33/022 , G01R33/0327 , Y10S505/845
Abstract: A magnetic field gradiometer includes a geometric arrangement of fiber op sensors through which light from a single frequency laser is transmitted. Having a pair of single-mode optical fibers, each of which are coupled to a magnetostrictive element, each sensor is formed in the manner of a Mach-Zehnder interferometer which is oriented to detect the spatial variation in a particular orthogonal component of the magnetic field by phase comparison of the light transmitted through its respective pair of fibers.
Abstract translation: 磁场梯度计包括光纤传感器的几何布置，通过该光学传感器传输来自单个频率激光器的光。 具有耦合到磁致伸缩元件的一对单模光纤，每个传感器以Mach-Zehnder干涉仪的方式形成，该干涉仪被定向成检测磁场的特定正交分量中的空间变化 通过相对于其相应的一对光纤传输的光进行相位比较。
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公开(公告)号：US4524322A
公开(公告)日：1985-06-18
申请号：US442497
申请日：1982-11-18
Applicant: Lloyd C. Bobb
Inventor： Lloyd C. Bobb
CPC classification number: G01R29/12 , G01R15/248 , G01R29/0885
Abstract: A fiber optic sensor system and associated technique is disclosed for measuring an electric field wherein a sensor arm of optical fiber cable is wound about a core member of piezoelectric material. A reference arm of optical fiber cable substantially equal in optical path length to the sensor arm is isolated and connected in parallel to the sensor arm so that coherent light generated by a single mode laser source may be split through the fiber-optic arms and recombined after passage therethrough for phase comparison. When subjected to a local electric field, the core member of piezoelectric material varies in dimensions and thereby causes a change in the strain in the optical fiber cable of the sensor arm. Relative phase changes in the coherent light caused by the resulting optical path length change of the strained sensor arm are detected by a passive homodyne demodulator and determinative of the value of the local electric field. A vane-type shield is adapted to be rotated about the core member for periodically reducing the local electric field to near zero thereby providing a reference level for field measurement.
Abstract translation: 公开了一种用于测量电场的光纤传感器系统和相关技术，其中光纤电缆的传感器臂缠绕在压电材料的芯部件上。 光传感器臂的光路长度基本相等的参考臂与传感器臂平行隔离并连接，使得由单模激光源产生的相干光可以通过光纤臂分裂并重新组合 通过其进行相位比较。 当经受局部电场时，压电材料的芯构件的尺寸变化，从而导致传感器臂的光缆中的应变变化。 由应变传感器臂产生的光程长度变化引起的相干光的相对相位变化由被动零差解调器检测，并确定局部电场的值。 叶片式护罩适于围绕芯构件旋转，以便将局部电场周期性地减小到接近零，从而为现场测量提供参考水平。
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公开(公告)号：US5461927A
公开(公告)日：1995-10-31
申请号：US272915
申请日：1994-06-30
Applicant: Lloyd C. Bobb , Howard D. Krumboltz
Inventor： Lloyd C. Bobb , Howard D. Krumboltz
CPC classification number: G02B6/3624 , G01B11/16 , G01D5/268 , G01L1/242
Abstract: An optical fiber strain sensor is provided which remembers the maximum stn a structure has experienced in a given timeframe. A pair of multi-mode optical fibers with flat ends meet end-to-end within a microbore capillary tube with which the fibers have frictional contact. The fibers are fastened to the structure at two points a known distance apart on either side of the capillary tube. Increasing strain in the structure pulls the fiber ends apart in proportion to the amount of strain; however, when strain is decreasing, the fibers buckle rather than move closer together. Therefore, the maximum strain is reflected as a maximum distance between the fiber ends. When the maximum strain experienced is to be measured, the free end of one fiber is connected to a light source and the free end of the other fiber is connected to a detector. The intensity of light transmitted to the detector will vary inversely with the distance apart the fiber ends are; therefore, this distance can be measured and correlated with strain to a high degree of accuracy.
Abstract translation: 提供了一种光纤应变传感器，其记忆了结构在给定时间段内经历的最大应变。 一对具有扁平端部的多模光纤在微孔毛细管内端对端，纤维具有摩擦接触。 纤维在毛细管的任一侧已知距离已知距离的两个点处紧固到结构。 结构中增加的应变使纤维端部与应变量成比例地分开; 然而，当应变减小时，纤维扣紧而不是靠近在一起。 因此，最大应变被反映为光纤端部之间的最大距离。 当要测量经历的最大应变时，一根光纤的自由端连接到光源，另一根光纤的自由端连接到一个检测器。 传输到检测器的光的强度将与纤维端部分开的距离成反比变化; 因此，该距离可以被测量并与应变高度精确地相关。
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Patent Agency Ranking
公开(公告)号：US4447117A
公开(公告)日：1984-05-08
申请号：US395557
申请日：1982-07-06
Applicant: Lloyd C. Bobb
Inventor： Lloyd C. Bobb
CPC classification number: G01D5/35367
Abstract: A gated fiber optic sensor system is disclosed for increasing the effectiveptical path of a length of optical fiber cable. A pulse of polarized light having a known optical wavelength is directed into a length of optical fiber cable for propagation therethrough in a cyclic path. A planar semiconductor member is mounted in the path of the polarized light pulse at the Brewster angle to permit continuous transmission of the polarized light pulse through the cable until a light pulse of a second optical wavelength is made to impinge upon the semiconductor member, changing the reflectivity characteristics thereof and causing the polarized pulse to be extracted from its cyclic path for detection and processing. In one preferred embodiment, the optical fiber cable is configured in a loop to provide the cyclic path for the polarized light pulse, while in another preferred embodiment, the pulse path is provided by a straight section of optical fiber cable forming a part of a highly reflective cavity having reflectors on either end.
Abstract translation: 公开了一种用于增加一段光纤电缆的有效光路的门控光纤传感器系统。 具有已知光波长的偏振光的脉冲被引导到用于在循环路径中传播的一段光纤电缆。 平面半导体部件以布鲁斯特角安装在偏振光脉冲的路径中，以允许偏振光脉冲连续透过电缆直到第二光波长的光脉冲撞击在半导体部件上，从而改变 反射率特性，并从其循环路径中提取极化脉冲进行检测和处理。 在一个优选实施例中，光纤电缆被配置成环路以提供用于偏振光脉冲的循环路径，而在另一个优选实施例中，脉冲路径由形成高度一部分的光纤电缆的直线部分 反射腔在两端具有反射器。
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公开(公告)号：US4438517A
公开(公告)日：1984-03-20
申请号：US210902
申请日：1980-11-28
Applicant: Lloyd C. Bobb , Michael Rankin , Gerald D. Ferguson
Inventor： Lloyd C. Bobb , Michael Rankin , Gerald D. Ferguson
CPC classification number: H01S3/105
Abstract: An interferometrically tuned laser resonator for selectively resonating at desired wavelength or fluorescent line. A dielectric reflector having reflectance characteristics which shift toward shorter wavelengths at incident angles not normal thereto is rotatably mounted at one end of a laser cavity along its axis. Rotation of the reflector permits adjustment of the incidence angle to obtain maximum cavity gain at a desired fluorescent line over adjacent competing lines.
Abstract translation: 一种干涉式调谐的激光谐振器，用于在期望的波长或荧光线上选择性谐振。 具有反射率特性的电介质反射器可以沿着其轴线可旋转地安装在激光腔的一端处，以较短的波长向不正常的入射角移动。 反射器的旋转允许调整入射角，以在相邻竞争线上的期望荧光线获得最大腔增益。
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18.发明授权Electromagnetic radiation detector utilizing an electromagnetic radiation absorbing element in a Mach-Zehnder interferometer arrangement 失效电磁辐射探测器利用马赫 - 策德尔干涉仪装置中的电磁辐射吸收元件
公开(公告)号：US5349437A
公开(公告)日：1994-09-20
申请号：US954521
申请日：1992-09-30
Applicant: Lloyd C. Bobb
Inventor： Lloyd C. Bobb
CPC classification number: G01J5/58 , G01J9/02 , G01J2009/023 , G01J2009/0288
Abstract: Apparatus is provided to detect electromagnetic radiation, in which a radion-absorbing element is disposed on a short section of an optical waveguide to provide a thermal interface therebetween. Radiation is absorbed by the element, which thereby heats the waveguide, causing it to change its optical pathlength in proportion to the radiation absorbed. Interferometer apparatus is connected to measure this change in optical pathlength as a change in the interference condition. This device is highly sensitive and can be operated at room temperature.
Abstract translation: 提供了用于检测电磁辐射的装置，其中辐射吸收元件设置在光波导的短部分上以在其间提供热界面。 辐射被元件吸收，从而加热波导，导致其与吸收的辐射成比例地改变其光程长度。 连接干涉仪装置以测量光路长度的变化作为干扰条件的变化。 该设备高度灵敏，可在室温下运行。
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公开(公告)号：US5093569A
公开(公告)日：1992-03-03
申请号：US587276
申请日：1990-09-21
Applicant: Howard D. Krumboltz , Lloyd C. Bobb
Inventor： Howard D. Krumboltz , Lloyd C. Bobb
CPC classification number: G02B6/264 , G01D5/35345 , G01D5/35377 , G01D5/3538 , G01L11/025 , G01L9/0088 , G01R33/0327 , G02B6/2552 , G02B6/4289 , G02B6/429 , G02B6/4286
Abstract: A sensor is disclosed in which light is launched into the core of a singlode optical fiber having a tapered-down or narrow waist region between 2 tapers along an internal portion of the length thereof. The fiber is positioned so that a physical effect to be measured bends the fiber in the narrow waist region. The intensity of the light exiting from the core of the fiber is measured and the displacement is determined in accordance with the measured intensity. The narrow waist region of the fiber has a V.sub.co parameter of less than 1. A bellows which changes dimension with a change in pressure may be coupled to the fiber to bend it in the waist region in proportion to pressure changes. A magnetostrictive element which changes dimension with changing magnetic field may be coupled to the narrow waist region so that a change in dimension causes a displacement which bends the fiber.
Abstract translation: 公开了一种传感器，其中光沿着其长度的内部部分发射到具有沿着其长度的2个锥度之间的锥形或窄腰部区域的单模光纤的纤芯中。 纤维的定位使得要测量的物理效应使纤维在窄腰部区域弯曲。 测量从纤芯的芯出射的光的强度，并根据测量的强度确定位移。 纤维的窄腰区域具有小于1的Vco参数。随着压力变化而改变尺寸的波纹管可以耦合到纤维，以在腰部区域中与压力变化成比例地将其弯曲。 可以将变化的磁场改变尺寸的磁致伸缩元件耦合到窄腰区域，使得尺寸的变化导致使纤维弯曲的位移。
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公开(公告)号：US4609871A
公开(公告)日：1986-09-02
申请号：US627306
申请日：1984-07-02
Applicant: Lloyd C. Bobb
Inventor： Lloyd C. Bobb
IPC: G01R33/032 , G02B6/44 , G02F1/09
CPC classification number: G01R33/0327 , G02B6/4457
Abstract: Temperature compensation of an optical fiber interferometer is achieved by wrapping and bonding one fiber arm transversely about the length of a magnetostrictive rod which is sensitive only to the magnetic field component along its length. The other fiber arm is wrapped and bonded about two generally semicircular caps, attached to either end of the rod, in a direction along the longitudinal axis of the rod.
Abstract translation: 光纤干涉仪的温度补偿通过围绕磁致伸缩棒的长度横向缠绕并粘合一根纤维臂来实现，该磁致伸缩棒仅沿着其长度对磁场分量敏感。 另一个纤维臂被缠绕并且沿着沿着杆的纵向轴线的方向围绕两个大致半圆形的盖子连接，该盖子连接到杆的任一端。
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