Angular anisoplanatism of a focused beam using beacons over horizontal path

Wu-ming Wu; Yu Ning

doi:10.1117/12.2230627

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26 January 2016 Angular anisoplanatism of a focused beam using beacons over horizontal path

Wu-ming Wu, Yu Ning

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Proceedings Volume 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015; 97960J (2016) https://doi.org/10.1117/12.2230627
Event: Selected Proceedings of the Chinese Society for Optical Engineering Conferences held November 2015, 2015, Various, China

Abstract

The performance of the achieve laser beam propagation through atmospheric turbulence with adaptive optics is degraded by the fact that the wavefront aberrations difference. This error is only include the angular anisoplanatism when there is separation between the achieve laser beam and beacon. In the paper we derive an analytic expression for the effective angular anisoplanatism as a function of displacement angular when the turbulence profile is uniform. It shows that the effective angular anisoplanatism becomes weaker as the diameter of laser beams and the Fried transverse coherence length increase. We report results from field experiments that the effective angular anisoplanatism of a focused beam over horizontal path. It is found that measured and theoretical results are consistent. The effective wavefront variance increases with the strength of atmospheric turbulence and the angular displacement. And the constant phase of angular anisoplanatism has no effect on the Strehl ratio of the beam.

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Wu-ming Wu and Yu Ning "Angular anisoplanatism of a focused beam using beacons over horizontal path", Proc. SPIE 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015, 97960J (26 January 2016); https://doi.org/10.1117/12.2230627

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