Chinese Journal of Quantum Electronics, Volume. 41, Issue 5, 802(2024)

Preliminary experiment of lidar detection of chlorophyll‐a and suspended matter concentration in seawater surface

XU Jie... WANG Zhangjun, CHEN Chao, ZHUANG Quanfeng, WU Jiasheng and GUO Tiantian |Show fewer author(s)
Author Affiliations
  • Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences),Qingdao 266100, China
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    Figures & Tables(12)
    Schematic diagram of the designed DFOL system
    Geometric overlap factor of DFOL
    Echo signals detected by the DFOL
    Fitting result of the chlorophyll-a concentration obtained by ACLW-CAR and DFOL signal
    Inversion results of chlorophyll-a concentration under different laser energy. (a) 0.28 mJ; (b) 0.4 mJ
    Fitting result of the detected concentration of 0.1 μm suspended matter by ACLW-CAR and DFOL signal
    Fitting result of the detected concentration of 1 μm suspended matter by ACLW-CAR and DFOL signal
    Graphs of shore experiment. (a) DFOL; (b) ACLW-CAR
    Echo signals (a) and SNR (b) of DFOL acquired in shore experiment
    Fitting result of the DFOL inversion data of
    Fitting result of the DFOL inversion data of suspended matter and ACLW-CAR detection data
    • Table 1. Main technical parameters of DFOL

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      Table 1. Main technical parameters of DFOL

      SubsystemParameterSpecification
      Transmitting subsystem

      Wavelength/nm

      Pulse energy/mJ

      Output frequency/kHz

      Pulse width/ns

      Laser divergence/mrad

      532

      0⁃0.4

      1

      3

      1

      Receiving subsystem

      Channel: CH1, CH2, CH3, CH4/nm

      Diameter of telescope/mm

      Diameter of Fresnel lens/mm

      Focal length of telescope/mm

      Focal length of Fresnel lens/mm

      FOV of telescope/mrad

      FOV of Fresnel lens/mrad

      532 P, 532 S, 650, 685

      95

      120

      500

      80

      9

      50

      Data acquisition subsystem

      Number of channels

      Sampling rate/GHz

      Sampling depth/bit

      4

      1

      14

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    Jie XU, Zhangjun WANG, Chao CHEN, Quanfeng ZHUANG, Jiasheng WU, Tiantian GUO. Preliminary experiment of lidar detection of chlorophyll‐a and suspended matter concentration in seawater surface[J]. Chinese Journal of Quantum Electronics, 2024, 41(5): 802

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    Paper Information

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    Received: Jan. 16, 2023

    Accepted: --

    Published Online: Jan. 8, 2025

    The Author Email:

    DOI:10.3969/j.issn.1007-5461.2024.05.010

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