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Wavelength tuning and thermal dynamics of continuous-wave mid-infrared distributed feedback quantum cascade lasers

  Articoli su Riviste JCR/ISI  (anno 2013)

Autori:  Tombez L., Cappelli F., Schilt S., Di Domenico G., Bartalini S., Hofstetter D

Affiliazione Autori:  Laboratoire Temps-Fréquence, Institut de Physique, Université de Neuchâtel, Avenue de Bellevaux 51, CH-2000 Neuchâtel, Switzerland; CNR-INO, Istituto Nazionale di Ottica and LENS, European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Riassunto:  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. (C) 2013 AIP Publishing LLC.

Rivista/Giornale:  APPLIED PHYSICS LETTERS
Volume n.:  103 (3)      Pagine da: 031111  a: 031111
Ulteriori informazioni:  The authors from the University of Neuchatel would like to acknowledge the financial support from the Swiss National Science Foundation (SNSF) as well as Alpes Lasers SA for providing useful information about the laser. The authors from CNR-INO and LENS would like to acknowledge Professor M. Yamanishi and Dr. N. Akikusa from Hamamatsu Photonics K. K. for having provided the room-temperature DFB QCL and the details about its design.
DOI: 10.1063/1.4813753

*Impact Factor della Rivista: (2013) 3.515   *Citazioni: 9
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  12/05/2019

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