Optimization of wavefront-sensorless adaptive optics for horizontal laser beam propagation in a realistic turbulence environment

Max Segel; Andreas Zepp; Esdras Anzuola; Szymon Gladysz; Karin Stein

doi:10.1117/12.2276240

30 August 2017 Optimization of wavefront-sensorless adaptive optics for horizontal laser beam propagation in a realistic turbulence environment

Max Segel, Andreas Zepp, Esdras Anzuola, Szymon Gladysz, Karin Stein

Author Affiliations +

Proceedings Volume 10408, Laser Communication and Propagation through the Atmosphere and Oceans VI; 104080E (2017) https://doi.org/10.1117/12.2276240
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Unconventional wavefront sensing strategies are being developed to provide alternatives for measuring the wave-front deformation of a laser beam propagating through strong turbulence and/or along a horizontal path. In this paper we present a modified wavefront-sensorless (WFS) adaptive optical (AO) system where the well-known stochastic parallel gradient descent (SPGD) algorithm is extended with a-priori knowledge of the spatial and temporal statistics related to atmospheric turbulence. Here, a modal implementation of the correction algorithm allows us to exploit modal wavefront decomposition to decrease SPGD optimization complexity. We also propose an implementation of a modal decomposition based on Karhunen-Lo eve polynomials instead of the common Zernike polynomials. Appropriate calibration of the deformable mirror is also presented. Performance evaluation of this modified wavefront-sensorless AO system is carried out in a realistic simulated turbulence environment and the results are compared against the traditional, zonal SPGD algorithms.

Conference Presentation

Citation Download Citation

Max Segel, Andreas Zepp, Esdras Anzuola, Szymon Gladysz, and Karin Stein "Optimization of wavefront-sensorless adaptive optics for horizontal laser beam propagation in a realistic turbulence environment", Proc. SPIE 10408, Laser Communication and Propagation through the Atmosphere and Oceans VI, 104080E (30 August 2017); https://doi.org/10.1117/12.2276240

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