公开(公告)号：US06594020B2

公开(公告)日：2003-07-15

申请号：US09906019

申请日：2001-07-13

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G01C1972

CPC分类号： G01C19/72 ,  G01R15/246 ,  G01R15/247

摘要： A system and a method for controlling the scale factor of a fiber optic sensor are disclosed. The scale factor may be maintained at a constant level by controlling the power level of the light source based on the amplitude of a modulation superimposed on the modulator drive signal. Alternatively, scale factor may be maintained at a constant level by setting the detected signal at twice the modulator drive frequency to zero.

摘要翻译： 公开了一种用于控制光纤传感器的比例因子的系统和方法。 可以通过基于调制器驱动信号上叠加的调制的幅度来控制光源的功率电平，将比例因子维持在恒定水平。 或者，通过将调制器驱动频率的两倍的检测信号设置为零，可以将比例因子保持在恒定水平。

公开(公告)号：US06535657B2

公开(公告)日：2003-03-18

申请号：US10147148

申请日：2002-05-16

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G02B600

CPC分类号： H01S5/0607 ,  G02B6/105 ,  H01S5/06209 ,  H01S5/06233 ,  H01S5/065 ,  H01S5/0652

摘要： A method for fabricating a transformer of linearly polarized light to elliptically polarized light is presented. The method involves twisting a birefringent fiber through angles that depend on the polarization desired. This technique obviates the need to splice fibers, as in common approaches. In the final step of the method, the polarization can be fine tuned by heating the fiber to cause the core of the fiber to diffuse into the cladding. Also, methods and systems are presented to transform substantially polarized light to substantially randomly polarized light.

公开(公告)号：US06208775B1

公开(公告)日：2001-03-27

申请号：US09337231

申请日：1999-06-22

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G02B600

CPC分类号： G02B6/105 ,  H01S5/0607 ,  H01S5/06209 ,  H01S5/06233 ,  H01S5/065 ,  H01S5/0652

摘要： A method for fabricating a transformer of linearly polarized light to elliptically polarized light is presented. The method involves twisting a birefringent fiber through angles that depend on the polarization desired. This technique obviates the need to splice fibers, as in common approaches. In the final step of the method, the polarization can be fine tuned by heating the fiber to cause the core of the fiber to diffuse into the cladding. Using this transformer of polarized light, a current sensor is presented that exploits the Faraday Effect in a Sagnac interferometer.

摘要翻译： 提出了一种制造线偏振光变换成椭圆偏振光的方法。 该方法涉及通过取决于期望极化的角度来扭转双折射光纤。 这种技术消除了如通常的方法来剪接纤维的需要。 在该方法的最后步骤中，可以通过加热光纤以使光纤的芯扩散到包层中来微调极化。 使用这种偏振光变压器，提出了利用Sagnac干涉仪中的法拉第效应的电流传感器。

公开(公告)号：US4950318A

公开(公告)日：1990-08-21

申请号：US314318

申请日：1989-02-22

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： C03B37/027 ,  C03B37/029 ,  G02B6/28 ,  G02B6/42

CPC分类号： C03B37/029 ,  C03B37/027 ,  G02B6/2835 ,  G02B6/2843 ,  G02B6/4216 ,  C03B2205/64

摘要： A method of forming an optical fiber joint between a pair of elongated optical fibers each of which has a longitudinal axis surrounded by a core and cladding having different refractive indices and forming a single-mode light-guiding region, the core and cladding of each fiber having non-circular transverse cross-sections defining two polarization-maintaining axes of birefringence transverse to the longitudinal axis of the fiber. Each of the fibers also has predetermined external flat reference surfaces for locating the core and cladding and the axes of birefringence within each fiber from the exterior geometry of the fiber. The method comprises shaping an elongated glass preform to have a cross-sectional configuration with flat longitudinal surfaces extending along the preform length, which flat surfaces are large-scale complements of the external reference surfaces on the fibers to be joined, such that the preform longitudinal surfaces will mate with the fiber reference surfaces when the preform is drawn down to the scale of the fibers; heating the shaped preform to a softened condition and then drawing the softened preform in a longitudinal direction to reduce the scale of the complementary surfaces so that the cross-sectional configuration of the drawn preform matches the cross-sectional configuration of the external reference surfaces on the fibers to be joined, and so that the preform longitudinal surfaces and the fiber reference surfaces will mate together; cooling the drawn preform and placing the optical fibers to be joined thereon with the ends of the fibers butted together, with the external reference surfaces on the fibers matingly engaging the complementary longitudinal surfaces on the drawn preform; and bonding the fibers to the drawn preform and bonding the abutting ends of the fibers to each other.

摘要翻译： 一种在一对细长光纤之间形成光纤接头的方法，每个细长光纤具有由芯包围的纵向轴线和具有不同折射率的包层并形成单模光导区域，每个光纤的芯和包层 具有限定横向于纤维的纵向轴线的双折射的两个偏振保持轴的非圆形横截面。 每个纤维还具有预定的外部扁平参考表面，用于从纤维的外部几何形状定位芯和包层以及每个纤维内的双折射轴。 该方法包括成形细长玻璃预型件以具有沿着预成型件长度延伸的平坦纵向表面的横截面构造，该平坦表面是待连接的纤维上的外部参考表面的大规模互补件，使得预成型件纵向 当预制件被拉伸到纤维的刻度上时，表面将与纤维参考表面配合; 将成形的预制件加热到软化状态，然后沿纵向拉伸软化的预成型件，以减小互补表面的刻度，使得拉伸的预制件的横截面构造与外部参考表面的横截面形状匹配在 要连接的纤维，并且使得预成型件纵向表面和纤维参考表面将配合在一起; 冷却拉伸的预成型件并将待连接的光纤放置在其上的纤维的端部对接在一起，并且纤维上的外部参考表面配合地接合拉制的预成型件上的互补纵向表面; 并将纤维粘合到拉伸的预成型件上，并将纤维的邻接端彼此接合。

公开(公告)号：US4712866A

公开(公告)日：1987-12-15

申请号：US888930

申请日：1986-07-24

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G02B6/024 ,  G02B6/10 ,  G02B6/16

CPC分类号： G02B6/105

摘要： A fiber-optic polarizer comprising the combination of an optical fiber having a polarization-holding core and cladding with different refractive indices and forming a single-mode guiding region, the guiding region being offset from the center of gravity of the fiber section and located sufficiently close to the surface of one side of the fiber, along a selected length of the fiber, to expose the evanescent field of the guiding region at the surface of the one side to allow coupling to a contiguous medium, the outer surface of the fiber having a non-circular cross-section with a predetermined geometric relationship to the guiding region and a pair of orthogonal polarization axes therein so that the location of the guiding region and the orientation of the axes can be ascertained from the geometry of the outer surface, and a coating of indium on at least the one side of the fiber where the evanescent field is exposed so that light waves having undesired polarizations are attenuated by the indium coating.

公开(公告)号：US4181515A

公开(公告)日：1980-01-01

申请号：US844295

申请日：1977-10-21

申请人： Richard B. Dyott ,  John L. Stevenson

发明人： Richard B. Dyott ,  John L. Stevenson

IPC分类号： C03B37/023 ,  C03B37/075 ,  G02B6/10 ,  G02F1/095 ,  G02F1/365 ,  C03C25/02 ,  C01B27/00 ,  C03B32/00

CPC分类号： C03B37/075 ,  C03B37/023 ,  G02B6/105 ,  G02F1/095 ,  G02F1/365 ,  Y10S117/919

摘要： An opto-electronic element consists of a dielectric optical waveguide having a single crystal core of meta-nitroaniline. The element is made by feeding molten meta-nitroaniline into a hollow fibre along which a temperature gradient exists. Nucleation sets in at one end of the fibre and the temperature gradient is altered to promote crystal growth along the fibre. The element can be used as a polarizer, in isolators, harmonic generators or mixers. The action of the device depends on either the non-linear optical properties of the meta-nitroaniline or the optical anisotropy of the meta-nitroaniline. To make a polarizer the meta-nitroaniline core is surrounded by a cladding having a refractive index lying midway between two of the refractive indices of the meta-nitroaniline.

摘要翻译： 光电子元件由具有间硝基苯胺的单晶核心的电介质光波导构成。 该元件是通过将熔融的间硝基苯胺进料到存在温度梯度的中空纤维中制成的。 纤维一端的成核位置和温度梯度被改变，以促进沿着纤维的晶体生长。 该元件可用作偏振器，隔离器，谐波发生器或混频器。 器件的作用取决于间硝基苯胺的非线性光学性质或间硝基苯胺的光学各向异性。 为了制备偏光片，间硝基苯胺核心被折射率位于间硝基苯胺的两个折射率之间的中间的包层围绕。

公开(公告)号：US06891622B2

公开(公告)日：2005-05-10

申请号：US09930738

申请日：2001-08-15

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G01R15/24 ,  G02B6/10 ,  H01S5/06 ,  H01S5/062 ,  H01S5/065 ,  G01B9/02

CPC分类号： G02B6/105 ,  G01R15/246 ,  H01S5/0607 ,  H01S5/06209 ,  H01S5/06233 ,  H01S5/065 ,  H01S5/0652

摘要： A method and device for measuring the current in a conductor are presented. They utilize the Faraday effect on counter-propagating circularly polarized beams of light in a fiber optic coil. The light beams are transformed to and from circular polarization by a polarization transformer comprised of a birefringent fiber with a twist through an appropriate angle at an appropriate distance from one end.

摘要翻译： 介绍了一种用于测量导体中电流的方法和装置。 它们利用法拉第效应对光纤线圈中反向传播的圆偏振光束的光。 通过由双折射光纤组成的偏振变换器将光束转换成圆偏振，并从其一端以适当的距离通过适当的角度进行扭转。

公开(公告)号：US06718097B2

公开(公告)日：2004-04-06

申请号：US09903387

申请日：2001-07-11

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G02B626

CPC分类号： G02B6/02 ,  G02B6/2826 ,  G02F1/0118

摘要： A method for incorporating an optical material into an optical fiber and optical devices utilizing the method are disclosed. Fiber material may be removed from the optical fiber to expose the fiber core and the core may then be at least partially removed. The optical material may then be incorporated into the core area to replace the removed core. Cladding material may then be deposited over the optical material and an electrode may be fixed to the cladding over the optical material to form an optical device.

摘要翻译： 公开了一种将光学材料结合到光纤中的方法和利用该方法的光学器件。 纤维材料可以从光纤中去除以暴露纤维芯，然后可以至少部分地去除芯。 然后可以将光学材料结合到芯区域中以替换去除的芯。 然后可以将覆层材料沉积在光学材料上，并且电极可以固定到光学材料上的包层以形成光学器件。

公开(公告)号：US06563589B1

公开(公告)日：2003-05-13

申请号：US09615166

申请日：2000-07-13

申请人： Sidney M. Bennett ,  Richard B. Dyott

发明人： Sidney M. Bennett ,  Richard B. Dyott

IPC分类号： G01B902

CPC分类号： G01R15/246 ,  G01C19/721

摘要： A reduced minimum configuration (RMC) fiber optic current sensor (FOCS) is proposed which includes a sensing coil or sensing region, a light source and an optical path arranged between the front output of the light source and the fiber optic sensing coil/region. At least one quarter wave plate is disposed between the optical path and the sensing coil/region for converting linearly polarized light beams into circularly polarized light beams propagating through the sensing coil/region. The circularly polarized light beams propagating though the sensing region experience a differential phase shift caused by a magnetic field or current flowing in a conductor proximate to the sensing coil. A light detector is located at the back output of the light source and produces an output signal in response to return light intensity transmitted through the light source. The return light intensity is a measure of the magnetic field in the sensor coil/region. The magnetic field may be produced by an electric current flowing through a wire, wherein the sensor coil can be wound around the wire. Electronics is described which minimizes effects caused by changes in the environmental conditions.

摘要翻译： 提出了一种减小的最小配置（RMC）光纤电流传感器（FOCS），其包括感测线圈或感测区域，光源和布置在光源的前端输出与光纤感测线圈/区域之间的光路。 至少四分之一波片设置在光路和感测线圈/区域之间，用于将线性偏振光束转换成通过感测线圈/区域传播的圆偏振光束。 通过感测区域传播的圆偏振光束经历由接近感测线圈的导体中流动的磁场或电流引起的差分相移。 光检测器位于光源的后输出处，并且响应于通过光源传输的返回光强而产生输出信号。 返回光强度是传感器线圈/区域中的磁场的量度。 磁场可以通过流过电线的电流产生，其中传感器线圈可以缠绕在电线上。 描述了最小化由环境条件变化引起的影响的电子装置。

公开(公告)号：US4818071A

公开(公告)日：1989-04-04

申请号：US716340

申请日：1985-03-26

申请人： Richard B. Dyott

发明人： Richard B. Dyott

IPC分类号： G01N15/02 ,  G01P5/26 ,  G01P3/36

CPC分类号： G01P5/26 ,  G01N15/0205

摘要： A fiber optic doppler anemometer comprises a source of coherent light, a directional coupler formed by the combination of a pair of single-mode optical fibers, and a photoelectric transducer. The first end of the first fiber receives an incident beam of light from the source and guides it through the directional coupler to the second end of the first fiber, which is located adjacent to a body of moving particles to be measured, where both the second end of the first fiber and the moving particles reflect a portion of the incident light back into the first fiber. The reflected light, which has a frequency different from that of the incident beam entering the first fiber, is directed back through the directional coupler which couples a portion of the reflected light toward the first end of the second fiber. The photoelectric transducer receives the light emerging at the first end of the second fiber and converts it into analogous electrical signals.This system may be used as a velocimeter using the Doppler effect to measure the velocity of moving particles and to measure the sizes of particles with Brownian motion.

摘要翻译： 光纤多普勒风速计包括相干光源，由一对单模光纤的组合形成的定向耦合器和光电换能器。 第一光纤的第一端接收来自光源的入射光束，并将其引导通过定向耦合器到第一光纤的第二端，第一光纤位于邻近待测量的移动颗粒体上，其中第二光纤 第一光纤的端部和移动的微粒将入射光的一部分反射回第一光纤。 具有与进入第一光纤的入射光束的频率不同的频率的反射光被引导回定向耦合器，该方向耦合器将反射光的一部分耦合到第二光纤的第一端。 光电传感器接收在第二光纤的第一端出现的光并将其转换为类似的电信号。 该系统可以使用多普勒效应来测量移动颗粒的速度并用布朗运动来测量粒子的尺寸。