公开(公告)号：WO2003048746A1

公开(公告)日：2003-06-12

申请号：PCT/US2002/037471

申请日：2002-11-21

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： LANGE, Charles ,  ANG, Dick ,  ANSON, Scott

IPC: G01N21/41

CPC classification number: G01M11/333 ,  G01D5/35325 ,  G01K11/32 ,  G01M11/331

Abstract: A fiber optic fault detector and generic fiber optic sensor system (100)for detecting breaks in an optical fiber using a low coherence interferometric technique. The system comprises a light source (102) configured to produce light traveling along the optical path, a modulator optically coupled to the light source configured to modulate at least a portion of the light as a function of a modulation signal (128), a detector optically coupled to the modulator configured to produce a detector output based upon a sensed intensity of the light, and an electronic array configured to receive the detector output and determine the optical fault. The low coherence interferometric technique allows for detection of a fault in the fiber with a minimal amount of test equipment and with higher measurement sensitivity and resolution. The system may alternatively include a transducer, positioned in place of the fiber under test (150), having a response which changes in reflective or optical path length. The system can be used in a LIDAR system, wherein telescope optics are used in place of the fiber under test (150), to transmit light and collect light scattered from objects or from the air.

Abstract translation: 一种光纤故障检测器和通用光纤传感器系统（100），用于使用低相干干涉技术检测光纤中的断裂。 该系统包括被配置为产生沿光路行进的光的光源（102），光学耦合到光源的调制器，被配置为根据调制信号（128）调制至少一部分光，检测器 光学耦合到调制器，被配置为基于感测的光强度产生检测器输出，以及电子阵列，其被配置为接收检测器输出并确定光学故障。 低相干干涉技术允许用最小量的测试设备和更高的测量灵敏度和分辨率来检测光纤中的故障。 替代地，该系统可以包括位于被测纤维（150）上的换能器，其具有反射或光程长度变化的响应。 该系统可以用在LIDAR系统中，其中使用望远镜光学器件代替被测光纤（150），以透射光并收集从物体或从空气散射的光。

公开(公告)号：WO2005022225A1

公开(公告)日：2005-03-10

申请号：PCT/US2004/002306

申请日：2004-01-27

Applicant: HONEYWELL INTERNATIONAL, INC.

Inventor： BLAKE, James ,  LANGE, Charles

IPC: G02B6/293

CPC classification number: G02B6/2821

Abstract: An exemplary WDM coupling device may include optical fibers. The coupling device may also include region(s) having varying coefficients of thermal expansion. During a temperature variation, one or more of the region(s) may alter in size to substantially cancel temperature-dependent changes associated with the WDM coupling device.

Abstract translation: 示例性的WDM耦合装置可以包括光纤。 耦合装置还可以包括具有变化的热膨胀系数的区域。 在温度变化期间，该区域中的一个或多个可以改变尺寸以基本上消除与WDM耦合装置相关联的温度依赖性变化。

公开(公告)号：WO2003071234A1

公开(公告)日：2003-08-28

申请号：PCT/US2003/005170

申请日：2003-02-19

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： LANGE, Charles ,  STRANDJORD, Lee, K. ,  ANG, Dick ,  SANDERS, Steve

IPC: G01D5/26

CPC classification number: G01C19/64 ,  G01B11/16 ,  G01C19/72 ,  G01D5/268 ,  G01N21/431 ,  G01S7/4811 ,  G01S7/4818 ,  G01S17/36 ,  G01S17/88

Abstract: A sensing element (150) is exposed into an environmental effect by modulating a light signal (128) and determining a path lenght as a function of the modulation signal. A detector (106, 108) detects light intensity. An electronics processor (126) receives the detector output and produces a modulation signal (128) for the light. The processor (126) further produces an output signal indicative of the environmental effect as a function of the modulating signal. The length of the optical path can be readily determined as a function of a "proper" modulation frequency that produces a relatively constant output at the detector (108). Fiber optics and integrated optics are used. Used as LIDAR or for strain, temperature, chemical or as a fiber break detector.

Abstract translation: 通过调制光信号（128）并确定作为调制信号的函数的路径长度，感测元件（150）暴露于环境效应。 检测器（106,108）检测光强度。 电子处理器（126）接收检测器输出并产生用于光的调制信号（128）。 处理器（126）进一步产生指示作为调制信号的函数的环境影响的输出信号。 可以容易地确定光路的长度作为在检测器（108）处产生相对恒定的输出的“适当的”调制频率的函数。 使用光纤和集成光学。 用作LIDAR或用于应变，温度，化学或纤维断裂检测器。

公开(公告)号：WO2003071227A1

公开(公告)日：2003-08-28

申请号：PCT/US2003/004887

申请日：2003-02-19

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： LANGE, Charles

IPC: G01C19/72

CPC classification number: G01C19/721

Abstract: A fiber optic gyroscope with counter-propagating electromagnetic waves in a fiber-optic coil senses rotation about the coil. Such a fiber-optic gyroscope uses a bias modulation to bias the gyroscope on a rate sensitivity portion of the interferogram. Using a saw-tooth wave as the bias modulation results in a system with many advantages over a system modulated by square waves or sinusoidal wave. For example, the system is less sensitive to cross coupling because the drive is significantly different than the detected signal. In addition, the saw tooth waveform can be used in a closed loop scheme with the advantage of a frequency output proportional to the rate and a reduction of elimination of the known causes of dead band in a closed loop gyro.

Abstract translation: 在光纤线圈中具有反向传播的电磁波的光纤陀螺仪感测围绕线圈的旋转。 这种光纤陀螺仪使用偏置调制来将陀螺仪偏置在干涉图的速率敏感部分上。 使用锯齿波作为偏置调制，导致与由方波或正弦波调制的系统相比具有许多优点的系统。 例如，系统对交叉耦合的敏感度较低，因为驱动器与检测到的信号显着不同。 此外，锯齿波形可以以闭环方式使用，其优点是与闭环陀螺仪中已知的死区原因的速率成比例并且减少消除。

公开(公告)号：WO2003060427A1

公开(公告)日：2003-07-24

申请号：PCT/US2002/040251

申请日：2002-12-16

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： SZAFRANIEC, Bogdan ,  KALISZEK, Andrew ,  LANGE, Charles

IPC: G01C19/72

CPC classification number: G01C19/721

Abstract: A fiber optic gyroscope (FOG) including a depolarizer having substantially equal first and second fiber segments of polarization maintaining (PM) fiber coupled to a single mode (SM) fiber loop. The first PM fiber segment includes sections of fiber connected together via a splice having an angle from about 35 0 to 55 0 between major axes of polarization of the sections which it connects. Similarly, the second PM fiber segment includes sections of fiber connected together via a splice having an angle from about 35 0 to 55 0 between major axes of polarization of the sections which it connects. The length of each fiber section is chosen to maintain the thermal and mechanical symmetry of the SM fiber loop.

Abstract translation: 一种光纤陀螺仪FOG，其包括具有基本上相同的第一和第二光纤段的去偏振器，其保持PM光纤耦合到单模SM光纤回路。 第一PM纤维段包括通过接头连接在一起的纤维部分，该接头在其连接的部分的主要偏振极轴之间具有大约350至550°的角度。 类似地，第二PM纤维段包括通过接头连接在一起的纤维部分，该接头在其连接的部分的主要极化轴之间具有大约350至550°的角度。 选择每个纤维部分的长度以保持SM纤维环的热和机械对称性。