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Récupération d'horloge par boucle à verrouillage de phase utilisant le mélange à quatre ondes dans un amplificateur optique à semi-conducteurs

Abstract : In the context of high-speed optical transmission networks, this work focuses on clock recovery, a function which is critical to signal reception and regeneration. At several tens of gigabits per second per channel, the electronic phase-locked loops that traditionally perform this task are difficult to realize. However, it is possible to reproduce their outline using faster nonlinear optical devices, notably semiconductor optical amplifiers.
After laying out the context and a few general considerations on the working principles of said phase-locked loops and optical amplifiers, we present two clock recovery systems using four-wave mixing occurring in the latter. This nonlinear effect is observed and studied, as well as the clock recovery devices themselves, whose operation is experimentally demonstrated on RZ and NRZ 10 Gbps optical signals. Bit error ratio measurements show negligible penalties; a locking bandwidth on the order of a few tens of kilohertz, and a jitter on the order of a picosecond, are obtained.
Although nowadays such bit rates are no longer that impressive, these schemes, being based on ultrafast nonlinear effects, can be extended to much higher bit rates (on the order of several hundred gigabits per second or beyond) and to fractional clock recovery, for time-division demultiplexing applications. The corresponding experiments remain to be done, as well as the utilization of nonlinear low-noise components such as microstructured optical fibers and periodically-poled lithium niobate.
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https://pastel.archives-ouvertes.fr/tel-00005767
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Submitted on : Monday, April 5, 2004 - 6:02:33 PM
Last modification on : Monday, October 19, 2020 - 11:11:56 AM
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  • HAL Id : tel-00005767, version 1

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Cédric Ware. Récupération d'horloge par boucle à verrouillage de phase utilisant le mélange à quatre ondes dans un amplificateur optique à semi-conducteurs. Traitement du signal et de l'image [eess.SP]. Télécom ParisTech, 2003. Français. ⟨tel-00005767⟩

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