High-speed complex phase retrieval of light propagating through optical turbulence: spatiotemporal characteristics

Darío G. Pérez, Aarón Cofré, Pablo Scherz, Bastián Romero, Eduardo Peters

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

Optical turbulence distorts beam amplitude and phase, causing spreading, wandering, and irradiance fluctuations. Reconstructing perturbed beams’ complex fields is experimentally challenging due to these dynamic effects. Our complex phase retrieval technique, using binary amplitude modulation with a DMD and high-speed camera, characterizes collimated beams through turbulence and overcomes interferometric limitations. Conventionally, phase retrieval modulates optical fields via random coded apertures (RCA) to recover amplitude and phase without prior knowledge, solving ill-posed problems with phase-lift algorithms. Our previous approach required ≥ 20 apertures, increasing acquisition time and complexity. We designed a new coded aperture, reducing time and enhancing quality over traditional RCA. Then we apply a novel deep-learning phase unwrapping algorithm enabling efficient unwrapping of phases with turbulence-induced branch point singularities manifesting as vortices. This is the first experimental observation of turbulence complex wavefronts reconstructed with high spatial resolution and sampling rate. We discuss observed statistical properties and compare with current models.

Idioma originalInglés
Título de la publicación alojadaEnvironmental Effects on Light Propagation and Adaptive Systems VII
EditoresKarin Stein, Szymon Gladysz
EditorialSPIE
ISBN (versión digital)9781510680968
DOI
EstadoPublicada - 2024
EventoEnvironmental Effects on Light Propagation and Adaptive Systems VII 2024 - Edinburgh, Reino Unido
Duración: 18 sep. 202419 sep. 2024

Serie de la publicación

NombreProceedings of SPIE - The International Society for Optical Engineering
Volumen13194
ISSN (versión impresa)0277-786X
ISSN (versión digital)1996-756X

Conferencia

ConferenciaEnvironmental Effects on Light Propagation and Adaptive Systems VII 2024
País/TerritorioReino Unido
CiudadEdinburgh
Período18/09/2419/09/24

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© 2024 SPIE.

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