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首页> 外文期刊>Optics Letters >Frequency-modulated continuous-wave laser ranging using low-duty-cycle signals for the applications of real-time super-resolved ranging
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Frequency-modulated continuous-wave laser ranging using low-duty-cycle signals for the applications of real-time super-resolved ranging

机译：使用低占空比信号进行频率调制的连续波激光，用于实时超分辨测距的应用

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摘要

A frequency-modulated continuous-wave laser ranging method using low-duty-cycle linear-frequency-modulated (LFM) signals is proposed. A spectrum consisting of a dense Kronecker comb is obtained so that the frequency of the beat signal can be measured with finer resolution. Since the dense comb is provided, super-resolved laser ranging can be achieved using a single-parametric frequency estimation method. Therefore, the run times of the estimation are reduced which promises real-time applications. A proof-of-concept experiment is carried out, in which an LFM signal with a bandwidth of 5 GHz and a duration of 1 mu s is used. The duty-cycle of the LFM signal is 10%. The time delay of a scanning variable optical delay line is obtained in real time from the frequency of the highest comb tooth, of which the measurement resolution is 20 ps. Moreover, a single-parametric nonlinear least squares method is used to fit the envelope so that the time delay can be estimated. with super-resolution. The standard deviation of the estimation displacements is 2.3 ps, which is 87 times finer than the bandwidth-limited resolution (200 ps). Therefore, the variation of the time delay can be precisely monitored. The proposed method may be used to achieve real-time high-resolution laser ranging with low-speed electronic devices. (C) 2021 Optical Society of America
机译：提出了一种基于低占空比线性调频（LFM）信号的调频连续波激光测距方法。获得了由密集Kronecker梳组成的频谱，以便以更高的分辨率测量拍频信号的频率。由于提供了密集梳，因此可以使用单个参数频率估计方法实现超分辨激光测距。因此，减少了估计的运行时间，保证了实时应用。进行了概念验证实验，其中使用了带宽为5GHz、持续时间为1μs的线性调频信号。LFM信号的占空比为10%。扫描可变光延迟线的时间延迟是从最高梳齿的频率实时获得的，其测量分辨率为20ps。此外，采用单参数非线性最小二乘法拟合包络，从而可以估计时间延迟。超分辨率。估计位移的标准偏差为2.3ps，比带宽限制分辨率（200ps）精细87倍。因此，可以精确地监测时间延迟的变化。该方法可用于利用低速电子设备实现实时高分辨率激光测距。（2021）美国光学学会

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  • 来源
    《Optics Letters》 |2021年第2期|共4页
  • 作者

    Xu Zhongyang; Sun Xiuyuan; Yu Fengxi; Chen Kai; Pan Shilong;

  • 作者单位

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Radar Imaging &

    Microwave Photon Minist Educ Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Radar Imaging &

    Microwave Photon Minist Educ Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Radar Imaging &

    Microwave Photon Minist Educ Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Radar Imaging &

    Microwave Photon Minist Educ Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Key Lab Radar Imaging &

    Microwave Photon Minist Educ Nanjing 210016 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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