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Chinese Journal of Lasers, Volume. 44, Issue 10, 1010005(2017)

Design of Direct Detection Doppler Lidar with Coherent Light Path

Zhang Nannan1,2、*, Han Yuli1,2, Chen Tingdi1,2, Sun Dongsong1,2, Zhou Anran1,2, and Han Fei1,2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (14)
    Cited By (6)
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    Figures & Tables(9)
    Atmospheric molecular backscatter coefficient with the laser wavelength of 354.7 nm

    Fig. 1. Atmospheric molecular backscatter coefficient with the laser wavelength of 354.7 nm

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    Backscatter spectrum distribution of atmospheric molecular

    Fig. 2. Backscatter spectrum distribution of atmospheric molecular

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    Rayleigh Doppler measurement principle based on F-P etalon. (a) Without Doppler frequency shift;(b) with Doppler frequency shift

    Fig. 3. Rayleigh Doppler measurement principle based on F-P etalon. (a) Without Doppler frequency shift;(b) with Doppler frequency shift

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    Light path diagram of the system

    Fig. 4. Light path diagram of the system

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    Wind velocity error varies with spectral width of etalon with different Δν

    Fig. 5. Wind velocity error varies with spectral width of etalon with different Δν

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    Backscatter signal of single pulse

    Fig. 6. Backscatter signal of single pulse

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    (a) Signal-to-noise ratio and (b) wind velocity error as a function of distance

    Fig. 7. (a) Signal-to-noise ratio and (b) wind velocity error as a function of distance

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    • Table 1. System detect indices

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      Table 1. System detect indices

      ParameterValue
      Wavelength /nm354.7
      Detection range /km0.5-5
      Working height /km20
      Velocity range /(m·s)-1-100-100
      Velocity error /(m·s)-1≤2@5 km
      Range resolution /m30
      Time resolution /s10

    • Table 2. Parameters of main devices of the system

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      Table 2. Parameters of main devices of the system

      DeviceParameterValue
      Tunable laserWavelength /nm354.7
      Pulse energy /mJ20
      Pulse duration /ns6-8
      Repetition /Hz100
      Frequency tunable range /GHz10
      Divergence angle /mrad≤1
      TelescopeDiameter /mm200
      Magnification40
      F-P interferometerRFS /GHz12
      FWHM of the edge /GHz1.7
      Edge separation /GHz4.3
      Locking separation /GHz1.3
      Peak transmission @355 nm60%
      PMTQuantum efficiency35%
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    Zhang Nannan, Han Yuli, Chen Tingdi, Sun Dongsong, Zhou Anran, Han Fei. Design of Direct Detection Doppler Lidar with Coherent Light Path[J]. Chinese Journal of Lasers, 2017, 44(10): 1010005

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Mar. 11, 2017

    Accepted: --

    Published Online: Oct. 18, 2017

    The Author Email: Nannan Zhang (znn0626@mail.ustc.edu.cn)

    DOI:10.3788/CJL201744.1010005

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology