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

Posted on 2019-06-28 - 16:05
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.

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Journal of the Optical Society of America B

AUTHORS (4)

Chensheng Wu
Daniel Paulson
John Rzasa
Christopher Davis
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