Phase retrieval of Laguerre-Gaussian beams through atmospheric turbulence by binary amplitude modulation

Eduardo Peters; Gustavo Funes; Jaime Anguita

doi:10.1117/12.2528556

Translator Disclaimer

6 September 2019 Phase retrieval of Laguerre-Gaussian beams through atmospheric turbulence by binary amplitude modulation

Eduardo Peters, Gustavo Funes, Jaime Anguita

Author Affiliations +

Proceedings Volume 11133, Laser Communication and Propagation through the Atmosphere and Oceans VIII; 111330S (2019) https://doi.org/10.1117/12.2528556
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

Wavefront reconstruction of Laguerre-Gaussian (LG) beams presents a great challenge due to the singularities in their phase profiles. Interferometric methods are difficult to implement since they require a reference beam and they are very sensitive to mechanical perturbations. Deterministic methods such as those based on the phase-transport or intensity-transport equation are limited to the paraxial approximation. Furthermore, if such beams propagate in atmospheric turbulence, complex dynamic characteristics are added to the problem. We seek to find an implementation of a technique that is capable of dynamically recovering the singular phases of LG beams under such random conditions. In this work, we will demonstrate a phase-retrieval technique that allows the recovery of LG wavefronts in turbulence and will characterize its effectiveness under a range of atmospheric parameters and propagation length. This technique is based on binary amplitude modulation and is suitable for dynamic applications.

Conference Presentation

Citation Download Citation

Eduardo Peters, Gustavo Funes, and Jaime Anguita "Phase retrieval of Laguerre-Gaussian beams through atmospheric turbulence by binary amplitude modulation", Proc. SPIE 11133, Laser Communication and Propagation through the Atmosphere and Oceans VIII, 111330S (6 September 2019); https://doi.org/10.1117/12.2528556

ACCESS THE FULL ARTICLE