Laser beam degradation by a tenuous ionized plasma containing a highly localized spatial frequency source

Thomas Goldring

doi:10.1117/12.18361

1 May 1990 Laser beam degradation by a tenuous ionized plasma containing a highly localized spatial frequency source

Thomas Goldring

Proceedings Volume 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere; (1990) https://doi.org/10.1117/12.18361
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

Evidence is presented which suggests the existence of turbulent atmospheric beam-propagation environments that are not adequately described by a smooth Kolmogorov cascade. Attention is given to a model which alters the Kolmogorov spectrum for refractive index with a 'bump' at high spatial frequencies, as well as to a method for computing the model's phase spectrum in the case of one transverse dimension. Analytical results indicate that, if the total power in the index spectrum is held constant, the total power in the phase spectrum is reduced by the bump's presence; the power is linearly proportional to the fraction of power not contained in the bump. Reduced scintillation is noted in the beam intensity, together with reduced beam centroids.

Citation Download Citation

Thomas Goldring "Laser beam degradation by a tenuous ionized plasma containing a highly localized spatial frequency source", Proc. SPIE 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere, (1 May 1990); https://doi.org/10.1117/12.18361

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