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Home > Teams > OPTics and IMAging > Microwave photonics and self-imaging

Microwave photonics and self-imaging

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Côme Schnébelin, Vincent Billault, Nithyanadan Kanagaraj, Vicente Duran-Bosch, Hugues Guillet de Chatellus

There is a striking similarity between wave propagation in free space and that of signals in dispersive media. This space-time duality is at the origin of many recent developments in the field of optics and more particularly in the field of processing or signal generation. Microwave photonics, which consists of generating or processing RF signals by optical techniques, makes massive use of concepts imported from the field of spatial optics and image formation. Within the OPTIMA team, we contribute to the development of temporal optical techniques through our know-how in frequency shifting loops. In parallel, we seek to deepen the duality space-time by proposing new concepts based on the effects of auto-imaging.

Schéma d’une boucle à décalage de fréquence (ou FSL). La boucle contient un décaleur de fréquence (AOFS), un amplificateur (EDFA) et un filtre ajustable (TBPF). Elle est injectée par un laser CW, éventuellement modulé. Un second coupleur permet d’extraire une fraction du champ circulant dans la boucle.

This projects are mostly supported by ANR (Agence Nationale de la Recherche)

  1. ANR project FROST, 2014-2018, ANR-14-CE32-0022,
  2. ANR project TAPAS, 2016-2020, ANR-16-ASTR-0015-01.

Arbitrary waveform generation in frequency shifting loops

Signal processing in frequency shifting loops

Acousto-optics frequency combs

Talbot effect and self-imaging

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