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Laser beam behavior on a long high path.

J B Mason, J D Lindberg

    Applied Optics
    |February 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Atmospheric conditions significantly impact laser beam propagation. This study observed laser beam spreading and deflection over an 80 km path, finding correlations with temperature lapse rates.

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    Area of Science:

    • Atmospheric optics
    • Laser physics

    Background:

    • Laser beam propagation is influenced by atmospheric turbulence.
    • Understanding these effects is crucial for long-distance optical communication and remote sensing.

    Purpose of the Study:

    • To investigate atmospheric effects on a laser beam over a unique, high-altitude path.
    • To correlate beam characteristics (spreading, deflection) with atmospheric parameters.

    Main Methods:

    • Observing a laser beam over an 80 km path at 1.3 km altitude.
    • Measuring beam spreading and deflection.
    • Correlating optical measurements with temperature lapse rate data.

    Main Results:

    • Beam deflection and spread showed consistency with previous studies over shorter, lower paths.

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  • Diurnal beam movements were less pronounced than expected.
  • A prolonged period of high beam collimation was observed.

    • Conclusions:

    • The atmospheric effects on laser beams at high altitudes are comparable to those at lower altitudes.
    • Temperature lapse rate is a key factor influencing beam quality.
    • Unique atmospheric conditions can lead to extended periods of stable beam propagation.