84560 Presenter: Ji Son Mentor: Haris Catrakis Title: Aero-Optics Technologies for the Optimization of Directed-Energy Systems in Aerospace Engineering The purpose of the study is to enhance the general understanding of laser beam propagation for aero-optics and laser communications. Therefore the main objectives are to develop a computational modeling methodology of aero-optical interactions for simulations at representative turbulent flow conditions and to relate the performance of directed-energy systems to the large-scale and small-scale flow behavior with implications for optimization. By relating the optical path length, the refractive index field, and the distance along the local optical ray path using the Optical Path Length Integral, the computational algorithm was produced. Using the algorithm, the optical path length variations are computed, and correlated to the interfacial-fluid-thickness behavior.