METHOD TO GENERATE AND DETECT TERAHERTZ RADIATION
    3.
    发明申请
    METHOD TO GENERATE AND DETECT TERAHERTZ RADIATION 审中-公开
    生成和检测TERAHERTZ辐射的方法

    公开(公告)号:WO2006123163A1

    公开(公告)日:2006-11-23

    申请号:PCT/GB2006/001848

    申请日:2006-05-18

    CPC classification number: G01N21/3581

    Abstract: A system for generating and detecting terahertz radiation comprises a first laser (1) and a second laser (2), each having a different frequency of laser light output. The system further comprises a radiation generating stage (4, 9) arranged to generate terahertz radiation by beating the light output of the first laser (1) with the light output of the second laser (2). A radiation detecting stage (12) is arranged to modulate light output from the first laser (1) with received terahertz radiation.

    Abstract translation: 用于产生和检测太赫兹辐射的系统包括第一激光器(1)和第二激光器(2),每个激光器具有不同的激光频率输出。 该系统还包括辐射发生级(4,9),其布置成通过用第二激光器(2)的光输出打打第一激光器(1)的光输出来产生太赫兹辐射。 放射线检测级(12)被布置成以接收的太赫兹辐射来调制从第一激光器(1)输出的光。

    A MONITOR UNIT FOR MONITORING AN OPTICAL WAVEGUIDE
    4.
    发明申请
    A MONITOR UNIT FOR MONITORING AN OPTICAL WAVEGUIDE 审中-公开
    用于监测光波导的监测单元

    公开(公告)号:WO1991002416A1

    公开(公告)日:1991-02-21

    申请号:PCT/GB1990001180

    申请日:1990-07-30

    CPC classification number: H04B10/0775 H04B10/0795 H04B10/07953

    Abstract: A monitor unit (1) for detecting physical interference of a communications fibre (4) in a transmission system (2) comprises a monitor circuit (9) coupled to the communications fibre (4). A portion of a signal being transmitted along the communications fibre (4) is coupled out of the fibre (4) and into the monitor unit (1). A filter (8) allows only one of two orthogonal polarisation field components to pass through it to the monitor circuit (9). By detecting fluctuations in the polarisation state of the filtered optical signal, the monitor circuit (9) allows the detection of external influences to be determined.

    Abstract translation: 用于检测传输系统(2)中的通信光纤(4)的物理干扰的监视器单元(1)包括耦合到通信光纤(4)的监控电路(9)。 沿着通信光纤(4)发送的一部分信号被耦合到光纤(4)外并进入监视器单元(1)。 滤波器(8)仅允许两个正交偏振场分量中的一个通过它到监视器电路(9)。 通过检测经滤波的光信号的偏振状态的波动,监视电路(9)允许确定外部影响的检测。

    OPTICAL COMMUNICATION SYSTEM
    7.
    发明申请
    OPTICAL COMMUNICATION SYSTEM 审中-公开
    光通信系统

    公开(公告)号:WO1986007657A1

    公开(公告)日:1986-12-31

    申请号:PCT/GB1986000353

    申请日:1986-06-18

    CPC classification number: G02F1/3517 H04B10/2504

    Abstract: An optical communication system comprises a transmission assembly (3) including a semiconductor laser amplifier (4). The laser amplifier (4) superimposes onto an amplitude modulated signal a phase modulation corresponding to the amplitude modulation. The optical communication system may further include a separation device for filtering out the amplitude modulation. A receiving assembly (7) is provided for detecting the phase modulation of a transmitted signal.

    Abstract translation: 一种光通信系统包括:包括半导体激光放大器(4)的传输组件(3)。 激光放大器(4)将幅度调制信号叠加到与幅度调制相对应的相位调制。 光通信系统还可以包括用于滤除振幅调制的分离装置。 提供接收组件(7),用于检测发射信号的相位调制。

    OPTICAL HOMODYNE DETECTION
    10.
    发明申请
    OPTICAL HOMODYNE DETECTION 审中-公开
    光学HOMODYNE检测

    公开(公告)号:WO1986006849A1

    公开(公告)日:1986-11-20

    申请号:PCT/GB1986000252

    申请日:1986-05-09

    CPC classification number: H04B10/61 G02F2/002 H04B10/63

    Abstract: An optical homodyne detection system comprises a source of optical radiation such as an external cavity laser (7). A directional coupler (8) receives optical radiation from the source (7) and couples the radiation in one direction into an optical waveguide (5) such as an optical fibre in which, in use, a modulated optical wave having carrier and data components travels in the opposite direction. The characteristics of the injected radiation from the source (7) and the form of the waveguide (5) are such that stimulated Brillouin scattering occurs whereby the carrier component of the modulated optical carrier wave is amplified. Demodulating means (10) is provided to which the optical wave with the amplified carrier component is fed.

    Abstract translation: 光学零差检测系统包括诸如外腔激光器(7)的光辐射源。 定向耦合器(8)从源(7)接收光辐射并将一个方向上的辐射耦合到诸如光纤的光波导(5)中,其中在使用中,具有载波和数据分量的调制光波行进 在相反的方向。 来自源(7)的注入的辐射和波导(5)的形式的特性使得受激的布里渊散射发生,由此调制的光载波的载波分量被放大。 提供具有放大载波分量的光波的解调装置(10)。

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