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 |