Wavelength tuning and thermal dynamics of continuous-wave mid-IR distributed feedback quantum cascade laser
Lionel Tombez, Francesco Cappelli, Stephane Schilt, Gianni Di Domenico, Saverio Bartalini & Daniel Hofstetter
| 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. |
| Mots-clés |
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| Citation | Tombez, L., Cappelli, F., Schilt, S., Di Domenico, G., Bartalini, S., & Hofstetter, D. (2013). Wavelength tuning and thermal dynamics of continuous-wave mid-IR distributed feedback quantum cascade laser. Appl. Phys. Lett., 103(031111), 1-5. |
| Type | Article de périodique (Anglais) |
| Date de publication | 17-7-2013 |
| Nom du périodique | Appl. Phys. Lett. |
| Volume | 103 |
| Numéro | 031111 |
| Pages | 1-5 |
| URL | http://scitation.aip.org/content/aip/journal/apl/103/3/10... |
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