Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth

Luc Thévenaz; Sanghoon Chin

doi:10.1016/j.crhy.2009.12.004

Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth
[Retards à grande bande passante engendrés dans une à ligne à retard tout-optique accordable, préservant la longueur d'onde et la bande passante du signal]

Luc Thévenaz ¹ ; Sanghoon Chin ¹

¹ École Polytechnique Fédérale de Lausanne, Institute of Electrical Engineering, STI-GR-SCI-LT Station 11, CH-1015 Lausanne, Switzerland

Comptes Rendus. Physique, Volume 10 (2009) no. 10, pp. 1008-1013.

Résumé
Abstract

Une nouvelle technique pour produire des grands retards ajustables et contrôlés de manière tout-optique, cesi pour un train d'impulsions de 100 ps dans des fibres optiques, est ici démontrée. La ligne à retard est réalisée par la combinaison de deux fonctions principales : une conversion de longueur d'onde via des amplificateurs optiques à semi-conducteurs et un retardement du signal via un milieu optique dispersif. Le signal converti en longueur d'onde a été retardé avec précision par propagation dans une fibre dispersive sur une échelle temporelle allant de la picoseconde à quelques nanosecondes, en conservant la longueur d'onde et la bande passante du signal. Des impulsions de 100 ps ont été retardé continûment jusqu'à 14 ns avec une distorsion réduite, correspondant à un retard séquentiel de 140-bits.

A novel technique to produce large all-optically controlled tunable delays of 100 ps pulse train in optical fibers is demonstrated. The configuration of the delay line basically consists of two main stages: the wavelength conversion via semiconductor optical amplifiers and the group velocity delaying via a dispersive optical medium. The wavelength-converted signal was precisely delayed over a wide temporal range from picoseconds to nanoseconds using a dispersive fiber, preserving the wavelength and the bandwidth of the signal. 100 ps FWHM signal pulses were delayed continuously up to 14 ns with moderate pulse distortion, corresponding to a 140-bit delay.

Publié le : 2009-12-01

DOI : 10.1016/j.crhy.2009.12.004

Keywords: Optical fibers, Nonlinear optics, Wavelength conversion, Optical propagation in dispersive media, Semiconductor optical amplifier, Slow light
Mot clés : Fibres optiques, Optique non-linéaire, Conversion en longueur d'onde, Propagation optique dans milieu dispersif, Amplificateur optiques à semi-conducteurs, Lumière lente

Affiliations des auteurs :

Luc Thévenaz ¹ ; Sanghoon Chin ¹

¹ École Polytechnique Fédérale de Lausanne, Institute of Electrical Engineering, STI-GR-SCI-LT Station 11, CH-1015 Lausanne, Switzerland

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     title = {Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth},
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     pages = {1008--1013},
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     language = {en},
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Luc Thévenaz; Sanghoon Chin. Wideband delays generated in an all-optical tunable delay line, preserving signal wavelength and bandwidth. Comptes Rendus. Physique, Volume 10 (2009) no. 10, pp. 1008-1013. doi : 10.1016/j.crhy.2009.12.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.12.004/

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