Exact analytic solution to the problem of thermal blooming and its interaction with turbulence: results from analytic functional scaling

Shirley Enguehard; Brian Hatfield

doi:10.1117/12.561451

18 October 2004 Exact analytic solution to the problem of thermal blooming and its interaction with turbulence: results from analytic functional scaling

Shirley Enguehard, Brian Hatfield

Author Affiliations +

Proceedings Volume 5552, Target-in-the-Loop: Atmospheric Tracking, Imaging, and Compensation; (2004) https://doi.org/10.1117/12.561451
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

We present the analytic theory for the interaction of thermal blooming and its interaction with optical turbulence in the form of an exact solution [2] which gives the asymtotics of the MCF and yields a Strehl. From that functional scaling is derived and a reconstruction algorithm is presented in terms of the eigenfunctions. The resulting systems model, AMPERES, which runs in real time on a PC matches the results of full non linear wave optics simulations. It is shown that thermal blooming is an asymtotic instability that requires a stable heating pattern to be imparted into the medium. Any kind of of wind shear disrupts the heating pattern and destroys the instability growth. Targets are not static. They are moving rapidly in cases of interest for HEL and the beam slew required to track the target naturally introduces a wind shear.

Citation Download Citation

Shirley Enguehard and Brian Hatfield "Exact analytic solution to the problem of thermal blooming and its interaction with turbulence: results from analytic functional scaling", Proc. SPIE 5552, Target-in-the-Loop: Atmospheric Tracking, Imaging, and Compensation, (18 October 2004); https://doi.org/10.1117/12.561451

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