23 August 2005 Beacon creation and characterization for beam control in strong turbulence
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Abstract
There is strong interest in developing adaptive optics solutions for extreme conditions, such as laser beam projection over long, horizontal paths. In most realistic operational scenarios there is no suitable beacon readily available for tracking and wave front sensing. In these situations it is necessary to create a bacon artificially. In this paper we explore two strategies for creating a beacon: (1) scattering an initially focused beam from a surface accomplished compensation for part of the path. In many cases of practical interest, beacons created by scattering of the light from a surface in the scene results in beacons which are anisoplanatic, and hence provide poor beam compensation results. Partial path compensation based on a Rayleigh beacon provides comparable performance in some cases.
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Michael C. Roggemann, Michael C. Roggemann, Timothy J. Schulz, Timothy J. Schulz, Alex Sergeyev, Alex Sergeyev, Grant Soehnel, Grant Soehnel, "Beacon creation and characterization for beam control in strong turbulence", Proc. SPIE 5895, Target-in-the-Loop: Atmospheric Tracking, Imaging, and Compensation II, 589506 (23 August 2005); doi: 10.1117/12.619017; https://doi.org/10.1117/12.619017
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