• Infrared and Laser Engineering
  • Vol. 54, Issue 5, 20240562 (2025)
Hao LUO, Wuyi LI, Zengli XIAO, Dandan JIANG, and Zhi LI
Author Affiliations
  • Nanjing Movelaser Technology Co.Ltd., Nanjing 210000, China
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    DOI: 10.3788/IRLA20240562 Cite this Article
    Hao LUO, Wuyi LI, Zengli XIAO, Dandan JIANG, Zhi LI. Close-range pulsed coherent Doppler wind lidar based on single AOM and single-stage fiber amplifier[J]. Infrared and Laser Engineering, 2025, 54(5): 20240562 Copy Citation Text show less
    (a) Schematic diagram of double-pass AOM based on circulator and reflector mirror; (b) Schematic diagram of double-pass AOM based on PBS and Faraday mirror; (c) Output pulse shape between two different methods
    Fig. 1. (a) Schematic diagram of double-pass AOM based on circulator and reflector mirror; (b) Schematic diagram of double-pass AOM based on PBS and Faraday mirror; (c) Output pulse shape between two different methods
    (a) Experimental setup of double-pass fiber amplification in CW mode; (b) Comparison on laser slope efficiency between double-pass and single-pass amplification; (c) Comparison on laser small signal gain between double-pass and single-pass amplification
    Fig. 2. (a) Experimental setup of double-pass fiber amplification in CW mode; (b) Comparison on laser slope efficiency between double-pass and single-pass amplification; (c) Comparison on laser small signal gain between double-pass and single-pass amplification
    (a) The schematic of pulse laser source for wind lidar based on single AOM and single-stage double pass method; (b) Slope efficiency of the pulsed laser source; (c) SMSR and (d) pulse waveform of the output laser;(e) The output average power stability curve for 3 hours
    Fig. 3. (a) The schematic of pulse laser source for wind lidar based on single AOM and single-stage double pass method; (b) Slope efficiency of the pulsed laser source; (c) SMSR and (d) pulse waveform of the output laser;(e) The output average power stability curve for 3 hours
    (a) Schematic diagram of wind lidar based on single-stage fiber amplifier; (b) Picture of pulsed coherent wind lidar
    Fig. 4. (a) Schematic diagram of wind lidar based on single-stage fiber amplifier; (b) Picture of pulsed coherent wind lidar
    The measured noise floor of test wind lidar and RIO seed laser
    Fig. 5. The measured noise floor of test wind lidar and RIO seed laser
    Correlation plots between test wind lidar and calibrated wind lidar at (a) 100 m, (b) 160 m and (c) 200 m
    Fig. 6. Correlation plots between test wind lidar and calibrated wind lidar at (a) 100 m, (b) 160 m and (c) 200 m
    ItemParametersValue
    Laser Wavelength/nm1549.5
    Linewidth/kHz<500
    Repetition frequency/kHz10
    Pulse width/ns300
    Pulse energy/µJ4.25
    AOMShifted frequency/MHz80
    Optical antennaDiameter/mm40
    BPDBandwidth/MHz200
    ADSampling rate/MHz400
    Table 1. Key parameters of test wind lidar system
    ItemParametersValue
    Laser Wavelength/nm1550.2
    Linewidth/kHz<500
    Repetition frequency/kHz30
    Pulse width/ns200
    Pulse energy/µJ6
    AOMShifted frequency/MHz80
    Optical antennaDiameter/mm40
    BPDBandwidth/MHz200
    ADSampling rate/MHz400
    Table 2. Key parameters of calibrated wind lidar system
    Distance/mAverage of the deviation/m·s-1Standard deviation/m·s-1
    100−0.0030.0586
    1600.01260.0564
    2000.02180.0625
    Table 3. Result of the average of the deviation and standard deviation of wind velocity at 100, 160, 200 m
    Hao LUO, Wuyi LI, Zengli XIAO, Dandan JIANG, Zhi LI. Close-range pulsed coherent Doppler wind lidar based on single AOM and single-stage fiber amplifier[J]. Infrared and Laser Engineering, 2025, 54(5): 20240562
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