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

Ramji V. Digumarthi; Naresh C. Mehta; Ross M. Blankinship

doi:10.1117/12.18339

1 May 1990 Effects of a realistic adaptive optics system on the atmospheric propagation of a high-energy laser beam

Ramji V. Digumarthi, Naresh C. Mehta, Ross M. Blankinship

Proceedings Volume 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere; (1990) https://doi.org/10.1117/12.18339
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

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.

Citation Download Citation

Ramji V. Digumarthi, Naresh C. Mehta, and Ross M. Blankinship "Effects of a realistic adaptive optics system on the atmospheric propagation of a high-energy laser beam", Proc. SPIE 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere, (1 May 1990); https://doi.org/10.1117/12.18339

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