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Video-rate high-precision time-frequency multiplexed 3D coherent ranging

Author

Listed:
  • Ruobing Qian

    (Duke University)

  • Kevin C. Zhou

    (Duke University)

  • Jingkai Zhang

    (Duke University)

  • Christian Viehland

    (Duke University)

  • Al-Hafeez Dhalla

    (Duke University)

  • Joseph A. Izatt

    (Duke University
    Duke University Medical Center)

Abstract

Frequency-modulated continuous wave (FMCW) light detection and ranging (LiDAR) is an emerging 3D ranging technology that offers high sensitivity and ranging precision. Due to the limited bandwidth of digitizers and the speed limitations of beam steering using mechanical scanners, meter-scale FMCW LiDAR systems typically suffer from a low 3D frame rate, which greatly restricts their applications in real-time imaging of dynamic scenes. In this work, we report a high-speed FMCW based 3D imaging system, combining a grating for beam steering with a compressed time-frequency analysis approach for depth retrieval. We thoroughly investigate the localization accuracy and precision of our system both theoretically and experimentally. Finally, we demonstrate 3D imaging results of multiple static and moving objects, including a flexing human hand. The demonstrated technique achieves submillimeter localization accuracy over a tens-of-centimeter imaging range with an overall depth voxel acquisition rate of 7.6 MHz, enabling densely sampled 3D imaging at video rate.

Suggested Citation

  • Ruobing Qian & Kevin C. Zhou & Jingkai Zhang & Christian Viehland & Al-Hafeez Dhalla & Joseph A. Izatt, 2022. "Video-rate high-precision time-frequency multiplexed 3D coherent ranging," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-29177-9
    DOI: 10.1038/s41467-022-29177-9
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    References listed on IDEAS

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    1. Jie Sun & Erman Timurdogan & Ami Yaacobi & Ehsan Shah Hosseini & Michael R. Watts, 2013. "Large-scale nanophotonic phased array," Nature, Nature, vol. 493(7431), pages 195-199, January.
    2. Johann Riemensberger & Anton Lukashchuk & Maxim Karpov & Wenle Weng & Erwan Lucas & Junqiu Liu & Tobias J. Kippenberg, 2020. "Massively parallel coherent laser ranging using a soliton microcomb," Nature, Nature, vol. 581(7807), pages 164-170, May.
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    Cited by:

    1. Dawoon Jeong & Hansol Jang & Min Uk Jung & Taeho Jeong & Hyunsoo Kim & Sanghyeok Yang & Janghyeon Lee & Chang-Seok Kim, 2024. "Spatio-spectral 4D coherent ranging using a flutter-wavelength-swept laser," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Anton Lukashchuk & Johann Riemensberger & Maxim Karpov & Junqiu Liu & Tobias J. Kippenberg, 2022. "Dual chirped microcomb based parallel ranging at megapixel-line rates," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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