Options
Wavelength tuning and thermal dynamics of continuous-wave mid-IR distributed feedback quantum cascade laser
Auteur(s)
Cappelli, Francesco
Bartalini, Saverio
Date de parution
2013-7-17
In
Appl. Phys. Lett.
Vol.
031111
No
103
De la page
1
A la page
5
Résumé
We report on the wavelength tuning dynamics in continuous-wave distributed feedback quantum cascade lasers (QCLs). The wavelength tuning response for direct current modulation of two mid-IR QCLs from different suppliers was measured from 10 Hz up to several MHz using ro-vibrational molecular resonances as frequency-to-intensity converters. Unlike the output intensity, which can be modulated up to several gigahertz, the frequency-modulation bandwidth was found to be on the order of 200 kHz, limited by the laser thermal dynamics. A non-negligible roll-off and a significant phase shift are observed above a few hundred hertz already and explained by a thermal model.
Identifiants
Type de publication
journal article
Dossier(s) à télécharger
