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    Researchers created a 180-meter atmospheric turbulence generator to study high-power laser beam propagation. This device simulates conditions for laser communications and directed energy applications, aiding in understanding beam stability.

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    Area of Science:

    • Physics
    • Optical Engineering
    • Atmospheric Science

    Background:

    • High-power laser beam propagation is crucial for applications like laser communications, power beaming, and directed energy.
    • Understanding atmospheric turbulence effects is essential for reliable long-distance laser applications.
    • Existing methods for simulating atmospheric turbulence may not fully replicate real-world conditions for extended horizontal paths.

    Purpose of the Study:

    • To construct and characterize a novel, long-path atmospheric turbulence generator.
    • To investigate the effects of continuous, variable atmospheric turbulence on laser beam propagation.
    • To provide a controlled environment for studying phenomena relevant to directed energy and laser communications.

    Main Methods:

    • Construction of a 180-meter-long atmospheric turbulence generator utilizing free convection from a heated surface.
    • Characterization of generated turbulence using constant-temperature anemometry.
    • Measurement of laser beam scintillation using a low-power laser to assess turbulence impact.

    Main Results:

    • Successfully generated a 180-meter-long, continuously variable atmospheric turbulence field.
    • Demonstrated the generator's ability to simulate turbulence relevant to long-distance horizontal propagation.
    • Quantified turbulence characteristics and their effect on laser beam scintillation.

    Conclusions:

    • The developed turbulence generator is a valuable tool for studying high-power laser beam propagation in realistic atmospheric conditions.
    • This facility enables research into mitigating turbulence-induced effects for improved laser system performance.
    • The findings support advancements in laser communications, power beaming, and directed energy technologies.