Modeling turbulent transport in laser beam propagation

James Wallace Jr.

doi:10.1117/12.43543

1 May 1991 Modeling turbulent transport in laser beam propagation

James Wallace Jr.

Proceedings Volume 1408, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere II; (1991) https://doi.org/10.1117/12.43543
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

In this report we present a model for turbulent mixing that can be incorporated into the wave optics codes describing turbulence and thermal blooming. The model for the turbulent velocity is three-dimensional. Because the resulting integrals are computationally intensive we have simultaneously developed a unified analytical approach for determining the three-dimensional random velocity field. The approach is based upon an orthogonal expansion of the velocity fields. The coefficients of the expansion are statistically independent Gaussian random variables. One of the important advantages of the analytical approach is the reduced computer memory and disk I/O requirements when the correlation length is much greater than the beam diameter. Only a few terms in the series are required to treat this important limiting case.

Citation Download Citation

James Wallace Jr. "Modeling turbulent transport in laser beam propagation", Proc. SPIE 1408, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere II, (1 May 1991); https://doi.org/10.1117/12.43543

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