公开(公告)号：US5189488A

公开(公告)日：1993-02-23

申请号：US796868

申请日：1991-11-25

申请人： John G. Mark ,  George A. Pavlath ,  Daniel A. Tazartes

发明人： John G. Mark ,  George A. Pavlath ,  Daniel A. Tazartes

IPC分类号： G01C19/72

CPC分类号： G01C19/72 ,  G01C19/728

摘要： Single and multiple axis fiber optic gyroscope systems employ orthogonal sequences to minimize the effects of both intra and inter-axis crosstalk. Sequences for driving electro-optic modulators are derived by examination of underlying primary and secondary demodulation sequences. Such underlying sequences are examined for orthogonality in accordance with a number of selection rules. When the selection rules are satisfied, the corresponding modulation sequences for driving the gyro(s) are identified and applied. By selecting the modulation waveforms in accordance with orthogonality criteria, one is assured of mean-zero bias errors within a predetermined number of loop transit times.

摘要翻译： 单轴和多轴光纤陀螺仪系统采用正交序列来最小化内部和轴间串扰的影响。 用于驱动电光调制器的序列是通过检查潜在的主要和次要解调序列得出的。 根据多个选择规则检查这样的底层序列的正交性。 当满足选择规则时，识别并应用用于驱动陀螺仪的相应调制序列。 通过根据正交性标准选择调制波形，可以确定预定数量的循环传送时间内的平均零偏置误差。

公开(公告)号：US20080147338A1

公开(公告)日：2008-06-19

申请号：US11638768

申请日：2006-12-13

申请人： George A. Pavlath ,  Daniel A. Tazartes

发明人： George A. Pavlath ,  Daniel A. Tazartes

IPC分类号： G01R1/00

CPC分类号： G01C19/721

摘要： A fiber optic gyroscope signal process dither system permits application of a low amplitude dither signal for many sampling periods without increasing the noise in the sampled outputs due to residual dither signals. A dither loop and an accumulator are added to a closed loop fiber optic gyroscope rotation sensing system. The dither loop has a delay and a gain that are adjusted to match the gain and delay of the fiber gyro loop. A zero mean dither of amplitude sufficient to break up the deadband is injected into to gyro and the dither loop. The dither loop filters the dither signal in the same manner as the gyro loop to provide a signal that is input to a differencing circuit to remove the dither signal from the gyro output.

摘要翻译： 光纤陀螺仪信号处理抖动系统允许在许多采样周期下施加低幅度抖动信号，而不会由于残留抖动信号而增加采样输出中的噪声。 抖动环路和累加器被添加到闭环光纤陀螺仪旋转感测系统中。 抖动环具有延迟和增益，其被调整以匹配光纤陀螺回路的增益和延迟。 将足够破坏死区的振幅为零的平均抖动注入陀螺仪和抖动环路。 抖动环路以与陀螺回路相同的方式对抖动信号进行滤波，以提供输入到差分电路的信号，以从陀螺仪输出中去除抖动信号。

公开(公告)号：US07859678B2

公开(公告)日：2010-12-28

申请号：US12316060

申请日：2008-12-09

申请人： Daniel A. Tazartes ,  George A. Pavlath

发明人： Daniel A. Tazartes ,  George A. Pavlath

IPC分类号： G01C19/72

CPC分类号： G01C19/726

摘要： An automatic gain control system for a fiber optic gyroscope control loop includes an adjustable gain applied to the gyro output signal. A pilot signal is injected into the fiber optic gyroscope control loop. A compensation loop receives signals output from the control loop and also receives pilot signals. The compensation loop processes the pilot signal to produce a compensation signal that is combined with signals output from the control loop to provide a compensated fiber optic gyroscope output signal. An automatic gain control loop is connected between the compensation loop and the adjustable gain applied to the fiber optic gyroscope output signal. The automatic gain control loop includes a gain error demodulator that multiplies the compensated fiber optic gyroscope output signal and the compensation signal together to produce a gain error signal used to control the adjustable gain in order to stabilize the gain of the gyro control loop.

摘要翻译： 用于光纤陀螺仪控制回路的自动增益控制系统包括施加到陀螺仪输出信号的可调增益。 导频信号被注入到光纤陀螺仪控制回路中。 补偿回路接收从控制回路输出的信号，并接收导频信号。 补偿环路处理导频信号以产生与从控制环路输出的信号组合的补偿信号，以提供经补偿的光纤陀螺仪输出信号。 自动增益控制回路连接在补偿回路和应用于光纤陀螺仪输出信号的可调增益之间。 自动增益控制回路包括增益误差解调器，该增益误差解调器将补偿的光纤陀螺仪输出信号和补偿信号相加在一起，以产生用于控制可调增益的增益误差信号，以稳定陀螺仪控制回路的增益。

公开(公告)号：US07633626B2

公开(公告)日：2009-12-15

申请号：US11638768

申请日：2006-12-13

申请人： George A. Pavlath ,  Daniel A. Tazartes

发明人： George A. Pavlath ,  Daniel A. Tazartes

IPC分类号： G01C19/72

CPC分类号： G01C19/721

摘要： A fiber optic gyroscope signal process dither system permits application of a low amplitude dither signal for many sampling periods without increasing the noise in the sampled outputs due to residual dither signals. A dither loop and an accumulator are added to a closed loop fiber optic gyroscope rotation sensing system. The dither loop has a delay and a gain that are adjusted to match the gain and delay of the fiber gyro loop. A zero mean dither of amplitude sufficient to break up the deadband is injected into to gyro and the dither loop. The dither loop filters the dither signal in the same manner as the gyro loop to provide a signal that is input to a differencing circuit to remove the dither signal from the gyro output.

摘要翻译： 光纤陀螺仪信号处理抖动系统允许在许多采样周期下施加低幅度抖动信号，而不会由于残留抖动信号而增加采样输出中的噪声。 抖动环路和累加器被添加到闭环光纤陀螺仪旋转感测系统中。 抖动环具有延迟和增益，其被调整以匹配光纤陀螺回路的增益和延迟。 将足够破坏死区的振幅为零的平均抖动注入陀螺仪和抖动环路。 抖动环路以与陀螺回路相同的方式对抖动信号进行滤波，以提供输入到差分电路的信号，以从陀螺仪输出中去除抖动信号。

公开(公告)号：US5146522A

公开(公告)日：1992-09-08

申请号：US719085

申请日：1991-06-18

申请人： George A. Pavlath

发明人： George A. Pavlath

IPC分类号： G02B6/30 ,  G02B6/42

CPC分类号： G02B6/4248 ,  G02B6/30 ,  Y10S359/90

摘要： Methods are disclosed for providing a rugged attachment of an optical fiber to an integrated optics chip. A first plate is attached to a first surface of the chip, the thickness of the chip is reduced to a value less than the diameter of the fiber but of sufficient optical thickness so that the evanescent field of a guided mode is negligible outside the chip, a second plate is attached to a second major surface of the reduced-thickness chip, the fiber is coaxially jacketed with a material suitable for attachment to the first and second plates, the fiber is positioned with respect to a waveguide on the chip, and the jacket of the fiber at its end face is symmetrically attached to both the first and second plates at a plurality of locations. Alternatively, a single plate can be attached to the first surface of the chip without reducing the thickness of the chip and either a jacket on the fiber or the curved periphery of the fiber itself can be attached symmetrically to both the plate and the substrate. The resulting connection between the optical fiber and the integrated optics chip is rugged, thermally insensitive, and suited for batch production processes. A wafer comprising a plurality of chips can be sandwiched between first and second plates or reinforced with a single plate, and subsequently subdivided into individual chips to which optical fibers can then be attached.

摘要翻译： 公开了提供光纤到集成光学芯片的坚固附件的方法。 第一板附接到芯片的第一表面，芯片的厚度减小到小于光纤的直径但具有足够的光学厚度的值，使得引导模式的渐逝场在芯片外部可忽略不计， 第二板连接到厚度小的芯片的第二主表面上，该纤维与适合于连接到第一和第二板的材料同轴地夹套，光纤相对于芯片上的波导定位，并且 在其端面处的纤维的护套在多个位置对称地附接到第一和第二板。 或者，可以将单个板连接到芯片的第一表面，而不会减小芯片的厚度，并且纤维上的护套或纤维本身的弯曲周边可以对称地附接到板和基板两者。 由此产生的光纤和集成光学芯片之间的连接是坚固的，热不敏感的，并且适用于批量生产过程。 包括多个芯片的晶片可以夹在第一和第二板之间或用单个板增强，并且随后被细分成单独的芯片，光纤然后可以附着到芯片上。

公开(公告)号：US4991926A

公开(公告)日：1991-02-12

申请号：US505968

申请日：1990-04-06

申请人： George A. Pavlath

发明人： George A. Pavlath

IPC分类号： G01C19/72 ,  G02B6/12 ,  G02B6/122 ,  G02B6/125 ,  G02B6/126 ,  G02B6/28

CPC分类号： G02B6/2808 ,  G01C19/721 ,  G02B6/125 ,  G02B6/126 ,  G02B6/2804

摘要： An integrated optics decorrelator device with a first integrated optics junction. The first optics junction has two input paths and at least one output path formed as a Y-shaped assembly of two mono-modal optical waveguides joined at a node with a central multi-modal optical waveguide. The central multi-modal optical waveguide segment has an output end. A second integrated optics junction has two output paths formed as a Y-shaped assembly of two output mono-modal optical waveguides joined at the output end of the central multi-modal optical waveguide segment. The first integrated optics junction and the second integrated optics junction are formed inside a refractive medium having a lower refractive index than the refractive index of the waveguides. The central multi-modal optical waveguide segment has an elongated multi-modal waveguide for decorrelating symmetric mode light passing through the central multi-modal optical waveguide with respect to anti-symmetric mode light passing through the substrate to the second integrated optics junction coupled to a tapered waveguide segment.

公开(公告)号：US4632551A

公开(公告)日：1986-12-30

申请号：US619119

申请日：1984-06-11

申请人： George A. Pavlath

发明人： George A. Pavlath

IPC分类号： G01D5/26 ,  G01D5/353 ,  G01D21/00 ,  G01H9/00 ,  G01J1/02 ,  G01N21/00 ,  G01R9/00 ,  G01R33/032 ,  G02B6/00 ,  G02B6/28 ,  G01B9/02

CPC分类号： G01D5/35383 ,  G01H9/004 ,  G02B6/2821 ,  G02B6/2861

摘要： This invention provides a sensor array using a plurality of fiber optic sensors connected between transmit fibers and receive fibers. The laser transmitter supplies pulses to the transmit fiber and fiber optic couplers couple the pulses from the transmit fiber into the fiber optic sensors. The pulses from the laser transmitter may be frequency chirped or frequency stepped to provide passive sampling of interferometric sensors in addition to intensity sensors, or otherwise frequency modulated. Each sensor is configured to respond to changes in a predetermined physical parameter by altering the shape of the pulse input thereto. Fiber optic couplers couple the sensor output signals into the receive fiber for input to a receiver, which converts the optical signals into electrical signals for input to a processer. A timing reference correlates the sensor output pulses with the sensors.

摘要翻译： 本发明提供了使用连接在发射光纤和接收光纤之间的多个光纤传感器的传感器阵列。 激光发射器向发射光纤提供脉冲，光纤耦合器将来自发射光纤的脉冲耦合到光纤传感器中。 来自激光发射器的脉冲可以是频率啁啾或频率阶梯以提供除了强度传感器之外的干涉测量传感器的被动采样，或以其他方式频率调制。 每个传感器被配置为通过改变输入到其中的脉冲的形状来响应预定物理参数的变化。 光纤耦合器将传感器输出信号耦合到接收光纤中，以便输入到接收器，该接收器将光信号转换成电信号以输入到处理器。 定时参考将传感器输出脉冲与传感器相关联。

公开(公告)号：US5970197A

公开(公告)日：1999-10-19

申请号：US227871

申请日：1999-01-08

申请人： George A. Pavlath

发明人： George A. Pavlath

IPC分类号： G02B6/02 ,  G02B6/24 ,  H01S3/06 ,  H01S3/17 ,  G02B6/10

CPC分类号： G02B6/243 ,  G02B6/02 ,  G02B6/03638 ,  G02B6/03694

摘要： Attenuation of an optical signal at the end of an optical fiber is achieved by positioning a high absorption region at the end of the fiber. A first embodiment teaches highly doped wedges within a tapered end of the fiber. The highly doped wedges adjacent the light transmitting core serve to absorb light at the end of the fiber. The light transmitting core of the fiber is reduced in diameter due to the tapering, causing the field of light to expand beyond the core. The highly doped wedges are in proximity to the core due to the tapering. The wedges, which are preferably heavily doped with a rare earth such as erbium, absorbs the escaping light in sufficient quantities, both in the initial pass through the tapered region and again upon reflection of the light at the end of the tapered region, such that the attenuation of the reflected light is within acceptable limits without regard to the condition of the fiber's end surface.

摘要翻译： 通过在光纤端部放置高吸收区域来实现光纤末端的光信号的衰减。 第一实施例教导在光纤的锥形端部内的高度掺杂的楔形物。 邻近光传输芯的高掺杂楔形物用于吸收光纤末端的光。 纤维的透光芯由于锥形而直径减小，导致光场扩展到芯之外。 高度掺杂的楔子由于锥形而靠近芯部。 优选地重掺杂有诸如铒的稀土的楔子在初始通过锥形区域中并且再次在锥形区域的端部的光反射时，以足够的量吸收逸出的光，使得 反射光的衰减在可接受的范围内，而不考虑光纤端面的状况。

公开(公告)号：US5933564A

公开(公告)日：1999-08-03

申请号：US562160

申请日：1995-11-22

申请人： George A. Pavlath

发明人： George A. Pavlath

IPC分类号： G02B6/38 ,  G02B6/00

CPC分类号： G02B6/3839 ,  G02B6/3865 ,  G02B6/3885

摘要： The optical interconnection apparatus includes one or more terminator blocks which hold a plurality of jacketed optical fibers and a flexible matrix which encloses the jacketed optical fibers and partially surrounds the terminator blocks so as to anchor the terminator blocks within the matrix. Each terminator block comprises a jacket holder and a jacket clamp. The jacket holder has a surface with a plurality of grooves for receiving a plurality of jacketed optical fibers. The jacket clamp clamps a plurality of jacketed optical fibers in the plurality of grooves of a jacket holder. The terminator blocks are used with a mold having one or more guide structures for use in guiding each of the terminator blocks into the mold, a terminator block having one or more guide followers which engage and follow the guide structures of the mold when the terminator block is inserted into the mold. The optical interconnection apparatus further comprises one or more connector blocks, each of which is attachable to two terminator blocks. The connector block holds the bare optical fibers protruding from a terminator block when the connector block is attached to the terminator block and bare optical fibers are protruding from the terminator block. Each connector block comprises a fiber holder and a fiber clamp. The fiber holder has a surface with a plurality of grooves dimensioned to receive a plurality of bare optical fibers. The fiber clamp provides the means for clamping the bare optical fibers in the grooves of a fiber holler.

摘要翻译： 光学互连装置包括一个或多个保持多个夹套光纤的终端块，以及包围被夹套的光纤并且部分地包围终端块的柔性矩阵，以将终端块固定在矩阵内。 每个终端块包括护套夹和夹套。 护套保持器具有带有多个槽的表面，用于容纳多个夹套的光纤。 夹套夹持器夹持夹套保持器的多个凹槽中的多个夹套光纤。 终止器块与具有一个或多个引导结构的模具一起使用，用于将每个终止器块引导到模具中;终止器块，其具有一个或多个引导随动件，当终止器阻挡块接合并跟随模具的引导结构时 插入模具中。 光学互连装置还包括一个或多个连接器块，每个连接器块可附接到两个终端块。 当连接器块连接到终端块并且裸露的光纤从终端块突出时，连接器块保持从终端块突出的裸光纤。 每个连接器块包括纤维架和纤维夹。 光纤保持器具有多个凹槽的表面，其尺寸被设计成容纳多个裸光纤。 光纤夹具提供了将裸光纤夹在光纤槽的槽中的装置。

公开(公告)号：US4915503A

公开(公告)日：1990-04-10

申请号：US91972

申请日：1987-09-01

申请人： George A. Pavlath

发明人： George A. Pavlath

IPC分类号： G01C19/72 ,  G01C19/64 ,  G02B6/28 ,  G02B6/34

CPC分类号： G02B6/2835 ,  G01C19/72 ,  G02B6/2821 ,  G02B6/2826

摘要： A fiber gyroscope provides improved bias stability and repeatability and has a greatly reduced polarizer extinction ratio requirement compared previous devices. This fabrication technique is compatible with both an all fiber gyroscope configuration and an integrated optics or bulk optics device. The present invention comprises a substrate that is preferably formed of fused silica. A pair of optical fibers, or two lengths of one fiber, are mounted to the substrate, and first planar surfaces are formed in the cladding. Optical couplers, polarizers and other components used in forming the rotation sensor are formed on the planar cladding surfaces of the fibers. Polarizers formed on the fibers have a transmission axis aligned with an axis of birefringence of the fiber to remove undesired linear polarization components from optical signals guided by the fibers while permitting a desired linear polarization component to propagate unattenuated. A sensing coil of optical fiber is arranged to guide light between the first and second optical fibers, the first and second optical fibers and the optical coupler cooperating to introduce counterpropagating light waves in the sensing coil.

摘要翻译： 光纤陀螺仪提供了改进的偏置稳定性和重复性，并且与以前的器件相比具有大大降低的偏振器消光比要求。 该制造技术与全光纤陀螺仪配置和集成光学或体光学器件兼容。 本发明包括优选由熔融二氧化硅形成的基底。 一对光纤或两段长度的一根光纤被安装到基板上，并且在包层中形成第一平面。 用于形成旋转传感器的光耦合器，偏振器和其它部件形成在纤维的平面包覆表面上。 形成在纤维上的偏振器具有与光纤的双折射轴对准的透射轴，以从由光纤引导的光信号中去除不期望的线偏振分量，同时允许期望的线偏振分量传播未衰减。 布置光纤传感线圈，以引导第一和第二光纤之间的光线，第一和第二光纤与光耦合器协同在传感线圈中引入反向传播的光波。