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Meter-scale spatial-resolution-coherent Doppler wind lidar based on Golay coding

机译:基于Golay编码的仪表级空间分辨率 - 相干多普勒风激光雷达

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摘要

Generally, the pulse duration of a coherent Doppler wind lidar (CDWL) is shortened to minimize the spatial resolution at the sacrifice of carrier-to-noise ratio, since the peak power of a laser source is limited by the stimulated Brillouin scattering or other nonlinear optical phenomena. To solve this problem, an all-fiber CDWL incorporating Golay coding is proposed and demonstrated. Given the peak power of the laser pulse, the Golay coding method can improve the measuring precision by improving the pulse repetition frequency of the outgoing laser. In the experiment, the Golay coding implementation is optimized by normalizing the intensity of every single pulse of the outgoing laser with a closed-loop feedback, achieving a spatial resolution of 6 m and a temporal resolution of 2 s with a maximum detection range of 552 m. The wind profile in line of sight and the result derived from another noncoding CDWL show good agreement. (C) 2019 Optical Society of America
机译:通常,缩短相干多普勒风潮(CDWL)的脉冲持续时间,以使载波到噪声比的牺牲处的空间分辨率最小化,因为激光源的峰值功率受到刺激的布里渊散射或其他非线性的限制 光学现象。 为了解决这个问题,提出并证明了一种包含Golay编码的全纤维CDWL。 鉴于激光脉冲的峰值功率,通过改善输出激光的脉冲重复频率,可以通过提高脉冲重复频率来提高测量精度。 在实验中,通过闭环反馈将输出激光器的每个单个脉冲的强度归一化,实现6米的空间分辨率和2秒的时间分辨率,优化了高尔也的编码实现,具有552的最大检测范围的空间分辨率和2 s的时间分辨率 m。 在视线中的风曲线和来自另一个非编码CDWL的结果显示良好的一致性。 (c)2019年光学学会

著录项

  • 来源
    《Optics Letters》 |2019年第2期|共4页
  • 作者单位

    Univ Sci &

    Technol China CAS Key Lab Geospace Environm Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Geospace Environm Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Geospace Environm Hefei 230026 Anhui Peoples R China;

    Gloly China Inst Lidar Technol Shanghai 201315 Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Geospace Environm Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Geospace Environm Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Geospace Environm Hefei 230026 Anhui 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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