Effects of a realistic adaptive optics system on the atmospheric propagation of a high energy laser beam

Details Effects of a realistic adaptive optics system on the atmospheric propagation of a high energy laser beam Effects of a realistic adaptive optics system on the atmospheric propagation of a high energy laser beam

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1221..157d&link_type=abstract

IN: Propagation of high-energy laser beams through the earth's atmosphere; Proceedings of the Meeting, Los Angeles, CA, Jan. 15-

Physics

Optics

Adaptive Optics, Atmospheric Optics, High Power Lasers, Laser Beams, Light Transmission, Actuators, Computer Programs, Discrete Functions, Earth Atmosphere, Pixels

Scientific paper

An adaptive optics (AO) correction system is generally required to compensate for beam degradations caused by interactions between a high energy laser (HEL) beam and the atmosphere. The GRAND propagation code includes a model of a realistic AO system representing many features of a state-of-the-art beam control system. This AO system includes models of a wavefront sensor, a tilt mirror, a focus (secondary) mirror, and a woofer-tweeter deformable mirror arrangement. This paper reports the results of a study to assess the impact of the realistic AO system on the correctability of HEL-atmosphere interactions. The GRAND code results compare the performance of the low-pass filter model and the realistic AO system model in the presence of turbulence and moderate-to-severe thermal blooming. In addition, the effects of low frequency Kolmogorov turbulence were studied in terms of its impact on the AO system requirements.

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