Abstract
There recently has been renewed interest in the non-linear effects of atmospheric propagation of High Energy Laser (HEL) radiation. Three important physical phenomena affecting the HEL propagation are optical turbulence, thermal blooming and Stimulated Raman Scattering (SRS). Not only do these phenomena individually cause distortions in the HEL wavefront passing through the atmosphere, but a non-linear interplay between these effects has a larger impact on the HEL wavefront degradation. For example, wavefront aberrations caused by a turbulent atmosphere produce non-uniform heating leading to scintillations which are difficult to correct with conventional adaptive optics systems. No systematic study has been reported of these non-linear effects and particularly of their mutual interactions.
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