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Quasi-distributed fiber-optic acoustic sensing system based on pulse compression technique and phase-noise compensation

机译:基于脉冲压缩技术和相位噪声补偿的准分布式光纤声学传感系统

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摘要

In this Letter, an ultra-low noise level is achieved for a quasi-distributed acoustic sensing system. This system is based on a pulse compression technique and phase-noise compensation configuration. In this system, a prototype of a weak reflector array is designed and fabricated to have similar to-40 dB reflectivity with a 20 m interval, and is used for improving the system's signal-to-noise ratio. The two techniques reduce the noise level by 18 dB, among which 11.56 dB is obtained with the assistance of the phase-noise compensation configuration. In the experiment to simulate the scenario with a link loss of 20 km and 20 m array interval, the system noise level is demonstrated to be -93.16 dB re rad/root Hz at 500-2500 Hz, which equals a strain resolution of 92.84 f epsilon /root Hz at 500-2500 Hz. (C) 2019 Optical Society of America
机译:在这封信中,对于准分布的声学传感系统,实现了超低噪声水平。 该系统基于脉冲压缩技术和相位噪声补偿配置。 在该系统中,设计和制造弱反射器阵列的原型,以使与20米的间隔相似的-40dB反射率,并且用于提高系统的信噪比。 这两种技术将噪声水平降低18 dB,其中在相位噪声补偿配置的帮助下获得11.56dB。 在实验中,模拟了连杆损耗20公里和20米的阵列间隔,系统噪声水平被证明为500-2500 Hz的-93.16 dB Rad / Root Hz,其等于92.84 f的应变分辨率 epsilon / root hz,500-2500 Hz。 (c)2019年光学学会

著录项

  • 来源
    《Optics Letters》 |2019年第24期|共4页
  • 作者单位

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ State Key Lab Adv Opt Commun Syst &

    Networks Shanghai 200240 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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