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    Area of Science:

    • Atmospheric optics
    • Optical engineering
    • Remote sensing

    Background:

    • Atmospheric coherence length is vital for optical wave transmission, indicating turbulence effects.
    • Real-time measurement of atmospheric coherence length is essential for diverse applications.
    • Existing methods may have limitations in acquiring this parameter efficiently.

    Purpose of the Study:

    • To develop and validate an optical computing lidar system for detecting atmospheric coherence length.
    • To investigate the spatial-temporal distribution of atmospheric coherence length.
    • To assess the feasibility and reliability of the novel lidar system.

    Main Methods:

    • Integration of imaging and lidar technologies with optical modulators and APD detectors.
    • Development of an optical computing lidar system.
    • Numerical simulations using a laser atmospheric turbulence phase screen transmission program.
    • Experimental measurements of atmospheric coherence length at multiple angles.

    Main Results:

    • Numerical simulations showed good consistency with conventional methods.
    • Experimental data indicated a gradual decrease in atmospheric coherence length with detection distance up to 4.5 km.
    • Observed atmospheric coherence length ranged from 4 to 9 cm.

    Conclusions:

    • Optical computing lidar is a feasible and reliable method for detecting atmospheric coherence length.
    • The developed system provides valuable insights into atmospheric turbulence.
    • The findings support the application of this technology in relevant fields.