Adaptive compensation of atmospheric effects with a high-resolution micromachined deformable mirror

Thomas Weyrauch; Mikhail A. Vorontsov; John W. Gowens II

doi:10.1117/12.451972

6 November 2002 Adaptive compensation of atmospheric effects with a high-resolution micro-machined deformable mirror

Thomas Weyrauch, Mikhail A. Vorontsov, John W. Gowens II

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Proceedings Volume 4825, High-Resolution Wavefront Control: Methods, Devices, and Applications IV; (2002) https://doi.org/10.1117/12.451972
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

We present experimental results for the adaptive compensation of atmospheric turbulence effects on a free-space laser communication links at near horizontal propagation paths over 2.5 km and 5 km lengths. A high-resolution micro-machined piston type mirror array (12x12 elements) and a fast beam steering mirror were used in an adaptive optics laser communication system based on the model-free stochastic parallel gradient descent (SPGD) optimization wavefront control technique. Control of the mirror was performed by a VLSI SPGD micro-controller. The experimental results demonstrate the improvement of the receiver performance (fiber coupling efficiency) on a summer day with a refractive index structure constant in the order of C_n²≈10^-14 m^-2/3.

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Thomas Weyrauch, Mikhail A. Vorontsov, and John W. Gowens II "Adaptive compensation of atmospheric effects with a high-resolution micro-machined deformable mirror", Proc. SPIE 4825, High-Resolution Wavefront Control: Methods, Devices, and Applications IV, (6 November 2002); https://doi.org/10.1117/12.451972

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