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MIXSEL (Modelocked Integrated eXternal-cavity Surface Emitting Lasers)
Responsable du projet Ursula Keller
Thomas Südmeyer

Eli Kapon
Bernd Witzigmann
   
Collaborateur Stephane Schilt
Gianni Di Domenico

Vladimir Dolgovskiy

Nikola Bucalovic

Lionel Tombez
   
Résumé Within this project, we proposed to demonstrate optically and electrically pumped MIXSELs (OP-MIXSELs and EP-MIXSELs) in both the pico- and femtosecond regime. Picosecond MIXSELs are ideally suited for clocking applications whereas femtosecond MIXSELs are required for continuum generation and many biomedical applications. For both cases average powers of >100 mW with electrical pumping and >500 mW with optically pumping need to be demonstrated. Saturable absorbers need to be optimized for integration into a MIXSEL and further developed for femtosecond pulse generation. We will mostly rely on quantum dot saturable absorbers and will explore the different trade-offs of quantum well versus quantum dot gain sections. We will perform a systematic design optimization of MIXSELs backed by numerical simulations. A drift-diffusion model can be used for the carrier transport and a transfer matrix method for optical simulation. These models will be extended with electro-optical and electro-opto-thermal simulations. Supercontinuum generation will be initially investigated with femtosecond diode-pumped solid-state lasers and then compared to the newly developed femtosecond MIXSELs.
We overachieved many of our target goals by far with high power ps OP-MIXSEL, 1 W fs OP-VECSEL and recently with the first fs OP-MIXSEL. Electrical pumping is still very challenging, more than initially anticipated, but we significantly improved our design leading to record short pulses from this type of modelocked lasers.
   
Mots-clés Lasers à impulsions ultra-courtes, Peignes de fréquence, Lasers à semi-conducteurs
   
Type de projet Recherche appliquée
Domaine de recherche Lasers à impulsions ultra-courtes, Peignes de fréquence
Source de financement Nanotera.ch
Etat Terminé
Début de projet 1-6-2009
Fin du projet 31-5-2013
Autre information Projet réalisé avec ETH Zurich, EPFL et Uni Kassel (D)
Contact Thomas Südmeyer