Distributed optical fiber sensor based on Raman and Brillouin scattering
    1.
    发明授权
    Distributed optical fiber sensor based on Raman and Brillouin scattering 失效
    基于拉曼和布里渊散射的分布式光纤传感器

    公开(公告)号:US08785859B2

    公开(公告)日:2014-07-22

    申请号:US13637910

    申请日:2010-08-20

    摘要: A distributed optical fiber sensor based on Raman and Brillouin scattering is provided. The distributed optical fiber sensor includes a semiconductor FP cavity pulsed wideband optical fiber laser (11), a semiconductor external-cavity continuous narrowband optical fiber laser (12), a wave separator (13), an electro-optic modulator (14), an isolator (15), an Er-doped optical fiber amplifier (16), a bidirectional coupler (17), an integrated wavelength division multiplexer (19), a first photoelectric receiving and amplifying module (20), a second photoelectric receiving and amplifying module (21), a direct detection system (22), a narrowband optical fiber transmission grating (23), a circulator (24) and a coherence detection module (25). The temperature and the strain can be measured simultaneously, and the signal-to-noise ratio of the system is enhanced.

    摘要翻译: 提供了一种基于拉曼和布里渊散射的分布式光纤传感器。 分布式光纤传感器包括半导体FP腔脉冲宽带光纤激光器(11),半导体外腔连续窄带光纤激光器(12),波分离器(13),电光调制器(14), 隔离器(15),掺铒光纤放大器(16),双向耦合器(17),集成波分复用器(19),第一光电接收和放大模块(20),第二光电接收和放大模块 (21),直接检测系统(22),窄带光纤传输光栅(23),循环器(24)和相干检测模块(25)。 可以同时测量温度和应变,提高系统的信噪比。