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12 条记录 (耗时 0.018 秒)

    Optical channel monitor utilizing multiple Fabry-Perot filter pass-bands
    3.
    发明授权
    Optical channel monitor utilizing multiple Fabry-Perot filter pass-bands 有权
    使用多个法布里 - 珀罗滤波器通带的光通道监视器

    公开(公告)号：US06993257B2

    公开(公告)日：2006-01-31

    申请号：US09929339

    申请日：2001-08-15

    申请人： Bryan L. Althouse ,  Gregg A. Johnson

    发明人： Bryan L. Althouse ,  Gregg A. Johnson

    IPC分类号： H04B10/08

    CPC分类号： H04B10/07955 ,  H04B10/077

    摘要： An optical channel monitor is described, the optical channel monitor includes an optical input port, a photodetector disposed in an optical path communicating at least intermittently with the optical input port, an optical filter disposed in the optical path between the optical input port and the photodetector, and an optical band splitter disposed in the optical path between the optical filter and the photodetector. The optical filter is a multibandpass filter, such as a scanning Fabry-Perot filter. The optical channel monitor also comprises a reference light system for providing a calibration standard against which an optical signal input through the input port may be compared. The channel monitor finds application in optical transmission systems including wavelength division multiplexed (WDM) optical communication systems.

    摘要翻译： 描述光通道监视器，光通道监视器包括光输入端口，设置在至少间歇地与光输入端口通信的光路中的光电检测器，设置在光输入端口和光电检测器之间的光路中的滤光器 以及设置在光学滤波器和光电检测器之间的光路中的光学分束器。 光滤波器是多波束通滤波器，例如扫描法布里 - 珀罗滤波器。 光通道监视器还包括用于提供校准标准的参考光系统，通过输入端口输入的光信号可与其对比。 信道监视器在包括波分复用（WDM）光通信系统的光传输系统中得到应用。

    Mobile telephone handset with pivoting latch
    4.
    发明授权
    Mobile telephone handset with pivoting latch 失效
    带旋转闩锁的手机

    公开(公告)号：US07308290B2

    公开(公告)日：2007-12-11

    申请号：US11368789

    申请日：2006-03-06

    申请人： Gregg A. Johnson ,  Richard E. La Spesa ,  Mark Edward Simek ,  John J. Wendorff ,  Gad Shaanan

    发明人： Gregg A. Johnson ,  Richard E. La Spesa ,  Mark Edward Simek ,  John J. Wendorff ,  Gad Shaanan

    IPC分类号： H04M1/00 ,  H04B1/38 ,  A45F5/00

    CPC分类号： H04B1/385 ,  A45F5/02 ,  A45F2200/0516 ,  F16B45/02 ,  H04B2001/3855 ,  H04M1/0214

    摘要： A mobile telephone handset includes an elongated housing having a carabiner latch pivotally attached at a battery door on the rear side of the housing. The carabiner latch includes a hook portion having a spring-biased latch pivotally attached thereto for attaching the latch to a support element, such as a strap, loop or ring attached to a back-pack or other article of wearing apparel. The latch is stored within a door recess that receives the latch for storage purposes. The latch can be swung outwardly away from the housing to a variety of positions. A cylindrical projection is disposed within the door recess for frictionally receiving a central opening of the latch. A finger grip recess disposed within the door facilitates the grasping of the latch when it is disposed within the recess to facilitate swinging it away from the housing and out of the recess.

    摘要翻译： 移动电话听筒包括细长壳体，其具有枢转地附接在壳体的后侧上的电池门处的卡扣闩锁。 挂钩闩锁包括钩部分，其具有枢转地附接到其上的弹簧偏压的闩锁，用于将闩锁附接到支撑元件，例如附接到背包或其他服装制品的带，环或环。 闩锁存储在门凹部内，用于存储用于接收闩锁。 闩锁可以从外壳向外摆动到各种位置。 圆柱形突起设置在门凹部内，用于摩擦地接收闩锁的中心开口。 设置在门内的手指握持凹槽有助于当闩锁被设置在凹槽内时抓握闩锁，以便于使其远离壳体摆动并离开凹部。

    Optical sensing device containing fiber Bragg gratings
    5.
    发明授权
    Optical sensing device containing fiber Bragg gratings 失效
    包含光纤布拉格光栅的光学感测装置

    公开(公告)号：US06674928B2

    公开(公告)日：2004-01-06

    申请号：US09917643

    申请日：2001-07-31

    申请人： Gregg A. Johnson ,  Michael D. Todd ,  Bryan L. Althouse ,  Chia-Chen Chang

    发明人： Gregg A. Johnson ,  Michael D. Todd ,  Bryan L. Althouse ,  Chia-Chen Chang

    IPC分类号： G02B600

    CPC分类号： G01L1/243 ,  G01D5/35383 ,  G01K11/3206 ,  G01L1/246

    摘要： A new optical sensing device containing fiber Bragg gratings, a scanning bandpass filter, an interferometer and multiple photodetectors is disclosed. The present invention also describes a new system and method for fibre Bragg grating (FBG) sensor interrogation and multiplexing. The new system combines a scanning Fabry-Perot (SFP) bandpass filter used to wavelength-multiplex multiple gratings in a single fiber, and an unbalanced Mach-Zehnder fibre interferometer made with a 3×3 coupler to detect strain-induced wavelength shifts. A passive technique for interferometer drift compensation using non-sensing FBGs is included in the system. A complete prototype system interrogates four gratings in a single fiber at a Nyquist sampling rate up to 10 kHz, with a noise floor measured near 4 n&egr; Hz−1/2 above 0.1 Hz. The inclusion of the interferometer drift compensation technique is shown to make quasi-static measurements feasible.

    摘要翻译： 公开了一种包含光纤布拉格光栅，扫描带通滤波器，干涉仪和多个光电探测器的新型光学感测装置。 本发明还描述了用于光纤布拉格光栅（FBG）传感器询问和复用的新系统和方法。 新系统结合了用于在单个光纤中波长复用多个光栅的扫描法布里 - 珀罗（SFP）带通滤波器和用3x3耦合器制成的不平衡马赫 - 曾德尔光纤干涉仪，以检测应变诱发的波长漂移。 系统中包含使用非感应FBG的干涉仪漂移补偿的被动技术。 完整的原型系统以高达10 kHz的奈奎斯特采样率在单根光纤中询问四个光栅，噪声基底在0.1赫兹附近测得。 显示了包含干涉仪漂移补偿技术，使准静态测量成为可能。

    Passive, temperature compensated techniques for tunable filter calibration in bragg-grating interrogation systems
    7.
    发明授权
    Passive, temperature compensated techniques for tunable filter calibration in bragg-grating interrogation systems 失效
    被动温度补偿技术，用于布拉格光栅询问系统中的可调谐滤波器校准

    公开(公告)号：US06744035B2

    公开(公告)日：2004-06-01

    申请号：US10346069

    申请日：2003-01-17

    申请人： Gregg A. Johnson ,  Bryan L. Althouse ,  Greg Nau ,  Sandeep T. Vohra

    发明人： Gregg A. Johnson ,  Bryan L. Althouse ,  Greg Nau ,  Sandeep T. Vohra

    IPC分类号： G01B902

    CPC分类号： G01K11/3206 ,  G02B6/0218 ,  G02B6/02204 ,  G02B6/29319 ,  G02B6/29395 ,  G02B6/29398 ,  H04B10/07

    摘要： A passive, temperature compensated tunable filter calibration device in a Bragg-grating interrogation system. The invention comprises two systems: 1) a dual substrate Bragg grating calibration system, the temperature of an array of gratings is estimated using an array of gratings bonded to a common host substrate and a single grating bonded to a material with a different coefficient of thermal expansion; 2) a hydrogen cyanide wavelength reference absorption cell that absorbs light at discrete wavelengths corresponding to the molecular vibration mode frequencies of the gas. A first photodetector sees the transmission spectrum and a second sees the reflections from Bragg gratings in a sensing array. In this system there is no temperature compensation step as the absorption lines are not sensitive to temperature.

    摘要翻译： 布拉格光栅询问系统中的被动温度补偿可调滤波器校准装置。 本发明包括两个系统：1）双基板布拉格光栅校准系统，使用结合到公共主机衬底的光栅阵列和结合到具有不同热系数的材料的单个光栅来估计光栅阵列的温度 扩张; 2）吸收对应于气体的分子振动模式频率的离散波长的光的氰化氢波长参考吸收单元。 第一光电检测器看到透射光谱，第二光电检测器看到来自感测阵列中的布拉格光栅的反射。 在该系统中，由于吸收线对温度不敏感，因此没有温度补偿步骤。

    Optical channel monitor with continuous gas cell calibration
    8.
    发明授权
    Optical channel monitor with continuous gas cell calibration 有权

    公开(公告)号：US06619864B2

    公开(公告)日：2003-09-16

    申请号：US09808222

    申请日：2001-03-15

    申请人： Gregg A. Johnson ,  Bryan L. Althouse

    发明人： Gregg A. Johnson ,  Bryan L. Althouse

    IPC分类号： H04B1008

    CPC分类号： H04B10/077 ,  H04B10/07955

    摘要： The invention includes a method and apparatus for monitoring wavelength of an optical channel. A tunable optical bandpass filter is used to correlate a signal from an optical transmission line with a signal from a reference light source. The signal from the reference light source passes through a reference gas cell. The absorption lines of the reference gas provide a known calibration standard against which measured values may be compared. The invention finds applications in optical transmission systems, including wavelength division multiplexed and dense wavelength division multiplexed (WDM and DWDM) optical communication systems.

    Synchronizing autonomous chaotic systems using filters
    9.
    发明授权
    Synchronizing autonomous chaotic systems using filters 失效
    使用过滤器同步自主混沌系统

    公开(公告)号：US06370248B1

    公开(公告)日：2002-04-09

    申请号：US09126711

    申请日：1998-07-31

    申请人： Thomas L. Carroll ,  Gregg A. Johnson

    发明人： Thomas L. Carroll ,  Gregg A. Johnson

    IPC分类号： H04L926

    CPC分类号： H04L9/001 ,  H04L9/12 ,  H04L2209/08

    摘要： A system for synchronizing chaotic transmitters and receivers that is less sensitive to channel effects than other known chaotic communication methods. The system employs duplicate transmitter and receiving modules and in addition to the chaotic output a synchronizing signal which occupies a reduced bandwidth. The small bandwidth affords the system a greater resistance to the affects of frequency dependent channel distortion and noise. The broad band chaotic signal is transmitted and appears to be noise to an unauthorized listener. The receiving unit employs band pass filtering, and when the signal is received the receiver filters the chaotic signal through band pass filters which eliminate channel noise and make gain control easier to implement.

    摘要翻译： 一种用于同步混沌发射机和接收机的系统，其对于信道效应比其他已知的混沌通信方法更不敏感。 该系统采用重复的发射机和接收模块，并且混沌输出除了占用减少的带宽的同步信号。 小的带宽使得系统对频率相关信道失真和噪声的影响有更大的阻力。 宽带混沌信号被传输，并且对于未经授权的监听者来说似乎是噪声。 接收单元采用带通滤波，当接收到信号时，接收机通过带通滤波器对混沌信号进行滤波，消除信道噪声，使得增益控制更容易实现。