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35 条记录 (耗时 0.019 秒)

    Carrier-suppressed optical time domain multiplexing
    1.
    发明授权
    Carrier-suppressed optical time domain multiplexing 有权
    载波抑制光时域复用

    公开(公告)号：US07574139B2

    公开(公告)日：2009-08-11

    申请号：US10157900

    申请日：2002-05-31

    申请人： Xiaoli Fu ,  Genzao Zhang ,  Feng Shi ,  Tongqing Wang ,  Jinghui Li

    发明人： Xiaoli Fu ,  Genzao Zhang ,  Feng Shi ,  Tongqing Wang ,  Jinghui Li

    IPC分类号： H04J14/08

    CPC分类号： H04J14/08

    摘要： A method and an apparatus for implementing carrier suppressed data format on conventional OTDM modules is provided. Adaptive phase shifting of optical signals traversing one of the tributaries of an OTDM module is performed with feedback loop control. A tapped portion of the input carrier signal is phase modulated at a frequency fc, and is combined with a tapped portion of the output from the OTDM. A phase shifter controller fed with this combined signal photodetects and band-pass filters the signal around fc to extract the amplitude of the AC component of the envelope of the combined signal, which depends upon the phase difference between successive pulses of the OTDM output. This signal is used to control a phase shifter coupled along one of the tributaries of the OTDM to adjust the phase difference of the signals of the two tributaries so that carrier suppression results.

    摘要翻译： 提供了一种用于在常规OTDM模块上实现载波抑制数据格式的方法和装置。 通过反馈回路控制执行穿过OTDM模块支路之一的光信号的自适应相移。 输入载波信号的抽头部分以频率fc相位调制，并与OTDM的输出的抽头部分组合。 馈送该组合信号的移相器控制器对fc周围的信号进行光谱检测和带通滤波，以提取组合信号的包络的AC分量的幅度，这取决于OTDM输出的连续脉冲之间的相位差。 该信号用于控制沿着OTDM的一个支路耦合的移相器，以调整两个支路的信号的相位差，从而导致载波抑制。

    Optical circuits for tunable second order PMD compensation and tunable dispersion compensation
    4.
    发明授权
    Optical circuits for tunable second order PMD compensation and tunable dispersion compensation 有权

    公开(公告)号：US07027135B2

    公开(公告)日：2006-04-11

    申请号：US10157901

    申请日：2002-05-31

    申请人： Xiaoli Fu ,  Genzao Zhang ,  Tongqing Wang ,  Feng Shi

    发明人： Xiaoli Fu ,  Genzao Zhang ,  Tongqing Wang ,  Feng Shi

    IPC分类号： G01N21/00

    CPC分类号： G02B6/29394 ,  G02B6/272 ,  G02B6/274 ,  G02B6/278 ,  G02B6/29395 ,  H04B10/2569

    摘要： A method and an apparatus is provided for introducing tunable second order polarization mode dispersion compensation to an optical signal without introducing any first order polarization mode dispersion into the optical signal. A method and an apparatus is also provided for tunable chromatic dispersion compensation by rotating the polarization state of an input signal to match the chromatic like second order PMD compensation provided by the present invention. In one configuration, birefringent elements are arranged into at least two stages, each stage having at least two birefringent elements, each birefringent element of one stage oriented orthogonal to a corresponding birefringent element of a corresponding stage. In another configuration, the polarization of optical signals emerging from each birefringent element are rotated to create effective orthogonal orientations between corresponding birefringent elements of corresponding stages.

    Re-configurable dispersion compensation module (RDCM)
    8.
    发明授权
    Re-configurable dispersion compensation module (RDCM) 失效
    可重新配置的色散补偿模块（RDCM）

    公开(公告)号：US06865311B2

    公开(公告)日：2005-03-08

    申请号：US10119121

    申请日：2002-04-10

    申请人： Jinghui Li ,  Tongqing Wang ,  Xiaoli Fu ,  Tiangong Liu ,  Genzao Zhang

    发明人： Jinghui Li ,  Tongqing Wang ,  Xiaoli Fu ,  Tiangong Liu ,  Genzao Zhang

    IPC分类号： H04B10/18 ,  G02B6/35 ,  G02B6/26

    CPC分类号： H04B10/25133

    摘要： A Re-Configurable Dispersion Compensation Module is provided. A new approach to the variable DCM, the RDCM combines existing optical switch technology with existing fixed DCM technology and advantageously also with existing TDCM technology into a programmable smart optical component. Advantageously Micro-Electrical Mechanical Switch (MEMS) optical switch technology may be used. The alternate RDCM technology provides a controller, and a set of controllable switches to employ a set of DCMs and TDCMs for adjusting the dispersion compensation along an optical signal path. This alternate RDCM technology mitigates the problems of conventional TDCMs, while fitting most of the requirements for high speed systems, and being of a compact size.

    摘要翻译： 提供了可重新配置的色散补偿模块。 对于变量DCM的新方法，RDCM将现有的光开关技术与现有的固定DCM技术结合在一起，并将现有的TDCM技术有利地集成到可编程智能光学组件中。 有利地可以使用微机电开关（MEMS）光开关技术。 备用RDCM技术提供了一个控制器和一组可控开关，以采用一组DCM和TDCM来调整光信号路径的色散补偿。 这种替代的RDCM技术可以减轻传统TDCM的问题，同时适应高速系统的大部分要求，并且尺寸紧凑。

    Integrated optical dual amplifier
    9.
    发明授权
    Integrated optical dual amplifier 有权
    集成光学双放大器

    公开(公告)号：US07460298B2

    公开(公告)日：2008-12-02

    申请号：US10354064

    申请日：2003-01-30

    申请人： Jinghui Li ,  Genzao Zhang ,  Tongqing Wang ,  Tiangong Liu

    发明人： Jinghui Li ,  Genzao Zhang ,  Tongqing Wang ,  Tiangong Liu

    IPC分类号： H04B10/17 ,  H04B10/12

    CPC分类号： H04B10/2918 ,  H01S3/06704

    摘要： An apparatus is provided comprising a dual optical amplifier. The two optical amplifiers are integrated, in that they share at a set of optical, electrical, or opto-electrical components. The two optical amplifiers may share a pump laser. Alternatively, the optical amplifiers may share photo-detectors. Methods of controlling the signal strength of output signals are also provided. A chip-based integrated optical dual amplifier, using Erbium-Doped Waveguides, is also provided.

    摘要翻译： 提供了一种包括双光放大器的装置。 这两个光放大器是集成的，因为它们共享一组光，电或光电组件。 两个光放大器可以共享泵激光器。 或者，光放大器可以共享光检测器。 还提供了控制输出信号的信号强度的方法。 还提供了使用铒掺杂波导的基于芯片的集成光学双放大器。

    Wireless traffic sensor system
    10.
    发明申请
    Wireless traffic sensor system 有权
    无线交通传感器系统

    公开(公告)号：US20120105252A1

    公开(公告)日：2012-05-03

    申请号：US13317610

    申请日：2011-10-24

    申请人： Tongqing Wang

    发明人： Tongqing Wang

    IPC分类号： G08G1/01 ,  H01M10/46

    CPC分类号： G08G1/0116 ,  E01F11/00 ,  G08G1/0133 ,  G08G1/0141 ,  G08G1/017 ,  G08G1/02 ,  G08G1/052 ,  H01F38/14 ,  H02J50/20

    摘要： Embodiments of the present invention provide a wireless traffic sensor system. The system includes a plurality of wireless traffic sensors collecting traffic information from one or more vehicles that pass by; and at least one wireless communication device that receives the traffic information from at least one of the wireless traffic sensors and relays the traffic information to a wireless communication tower in vicinity. At least one of the wireless traffic sensors is placed inside a container and has a mounting flange that lays over edge of the container and is affixed to the container by one or more spring clips. The spring clips are not physically accessible once the wireless traffic sensor is affixed to the container, and are released only upon receiving a coded wireless electromagnetic signal or by a special tool that matches to a key inside the wireless traffic sensor.

    摘要翻译： 本发明的实施例提供了一种无线业务传感器系统。 该系统包括从一个或多个经过的车辆收集交通信息的多个无线交通传感器; 以及至少一个无线通信设备，其从所述无线业务传感器中的至少一个接收所述业务信息，并将所述业务信息中继到附近的无线通信塔。 无线通信传感器中的至少一个被放置在容器内并具有安装凸缘，其安置在容器的边缘上并且通过一个或多个弹簧夹固定到容器。 一旦无线传感器被固定在容器上，弹簧夹就不能物理地接近，并且只有在接收到编码的无线电磁信号或者通过与无线传感器内部的钥匙匹配的专用工具才被释放。