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Absorbant saturable ultra-rapide à multipuits quantiques pour le traitement tout-optique du signal

Abstract : This thesis deals with the study of saturable absorbers based on Fe-doped InGaAs/InP multiple quantum wells (MQW). The non-linear optical properties of excitonic absorption are exploited for all-optical regeneration at 1.55mm. A numerical model is developed for the calculation of the non-linear optical properties of MQW structures. The efficiency of Fe doping to shorten the absorption relaxation time is experimentally demonstrated and explained by a dynamic model of the carriers capture by Fe atoms. The insertion of Fe doped MQW into a microcavity, which resonance is matched to excitonic transition, reduces the switching energy by a 50-factor and enhances the contrast ratio (CR) to 8dB. Such a CR value increases the transmission distance of a numerical signal by more than 1000km at 10Gb/s, with a constant transmission quality. The response time can be reduced to 290fs and the CR stays at a relatively high value of 5dB.
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https://tel.archives-ouvertes.fr/tel-00010801
Contributor : Maud Gicquel <>
Submitted on : Thursday, October 27, 2005 - 3:53:45 PM
Last modification on : Saturday, July 11, 2020 - 3:23:02 AM
Long-term archiving on: : Friday, April 2, 2010 - 11:02:06 PM

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  • HAL Id : tel-00010801, version 1

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Maud Gicquel-Guézo. Absorbant saturable ultra-rapide à multipuits quantiques pour le traitement tout-optique du signal. Physique Atomique [physics.atom-ph]. INSA de Rennes, 2004. Français. ⟨tel-00010801⟩

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