Extracting phase distortion from laser glints on a remote target using phase space plenoptic mapping

Published on 2019-06-28T16:05:50Z (GMT) by
Directed energy systems rely on the phase conjugation concept to focus laser beams remotely through turbulent environment. In application, a major problem exists where the beacon signal may not be well-defined upon generation nor free from speckle patterns in its vicinity. Such phenomena make it problematically difficult to extract accurate phase information from the scene of a laser beacon, and direct a phase conjugated beam towards the target. In this work, we propose and demonstrate the use of a plenoptic sensor system that images the 4D phase space of multiple glints on a target. A phase retrieval algorithm is designed and applied to reveal the phase distortion from irregular glint patterns. The reconstruction results are verified through comparison with the phase retrieval from a well-defined beacon that alternates its existence in adjacent frames. As a result, we show that the multi-glint interference problem can be solved through a plenoptic sensor system, which further broadens the application scenarios for directed energy systems.

Cite this collection

Wu, Chensheng; Paulson, Daniel; Rzasa, John; Davis, Christopher (2019): Extracting phase distortion from laser glints on a remote target using phase space plenoptic mapping. The Optical Society. Collection.