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Proceedings Paper

High-performamce continuous wave quantum cascade lasers with widely spaced operation frequencies
Author(s): A. Wittmann; L. Hvozdara; S. Blaser; M. Giovannini; J. Faist; D. Hofstetter; M. Beck; E. Gini
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Paper Abstract

Room temperature, continuous wave (CW) operation of distributed feedback (DFB) quantum cascade lasers with widely spaced operation frequencies is reported. The relatively small temperature tuning range of a single device, smaller or equal to approximately 1 % of the wavelength, usually limits their efficiency for spectroscopic investigations. By using a bound-to-continuum active region to create a broad gain spectrum and monolithic integration of different DFB gratings, we achieved high-performance devices with single-mode emission between 7.7 and 8.3 &mgr;m at a temperature of +30 °C. This frequency span corresponds to 8 % of the center frequency. The maximum CW operation temperature achieved was 63 °C at the gain center and as much as 35 °C and 45 °C, respectively, at the limits of the explored wavelength range.

Paper Details

Date Published: 23 February 2007
PDF: 8 pages
Proc. SPIE 6485, Novel In-Plane Semiconductor Lasers VI, 64850P (23 February 2007); doi: 10.1117/12.713734
Show Author Affiliations
A. Wittmann, Univ. de Neuchâtel (Switzerland)
L. Hvozdara, Alpes Lasers SA (Switzerland)
S. Blaser, Alpes Lasers SA (Switzerland)
M. Giovannini, Univ. de Neuchâtel (Switzerland)
J. Faist, Univ. de Neuchâtel (Switzerland)
D. Hofstetter, Univ. de Neuchâtel (Switzerland)
M. Beck, Univ. de Neuchâtel (Switzerland)
E. Gini, ETH Zürich (Switzerland)

Published in SPIE Proceedings Vol. 6485:
Novel In-Plane Semiconductor Lasers VI
Carmen Mermelstein; David P. Bour, Editor(s)

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