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Proceedings Paper

Room-temperature continuous-wave single-mode quantum cascade lasers
Author(s): Stéphane Blaser; Lubos Hvozdara; Yargo Bonetti; Antoine Muller; Andreas Bächle; Stephan Jochum; Stefan Hansmann; Thierry Aellen; Marcella Giovannini; Jérôme Faist
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Paper Abstract

We report a realization of single-frequency quantum-cascade lasers in continuous-wave mode on thermo-electrical cooler at frequencies ~ 1830 cm-1 (~ 5.46 μm) and ~ 1900 cm-1 (~ 5.26 μm). The active region of the lasers is based on the broad gain bound-to-continuum concept. We report a 1.5 mm-long, 18 μm-wide quantum-cascade laser exhibiting single-mode emission over the entire investigated temperature and current ranges with a side-mode suppression ratio > 25 dB. Output powers up to 54 mW at -30°C and 1.2 mW at +27°C are demonstrated. A tuning range of 12.8 cm-1 (0.7%) can be obtained between 1823.1 cm-1 and 1835.9 cm-1. A different device, 1.5 mm-long, 12 μm-wide, is reported in the range 1892.8 cm-1 to 1905.5 cm-1, exhibiting output power of 59 mW at -30°C and 0.8 mW at +20°C. The objective of this development is to obtain a room-temperature continuous-wave quantum-cascade laser at 1900cm-1, important for NO (nitric oxide) measurements. We demonstrate also Fabry-Pérot continuous-wave operation of quantum-cascade lasers grown by metal organic vapour phase epitaxy up to -5°C without the need of buried heterostructure processing.

Paper Details

Date Published: 22 February 2006
PDF: 8 pages
Proc. SPIE 6133, Novel In-Plane Semiconductor Lasers V, 613301 (22 February 2006); doi: 10.1117/12.645964
Show Author Affiliations
Stéphane Blaser, Alpes Lasers SA (Switzerland)
Lubos Hvozdara, Alpes Lasers SA (Switzerland)
Yargo Bonetti, Alpes Lasers SA (Switzerland)
Antoine Muller, Alpes Lasers SA (Switzerland)
Andreas Bächle, AL Technologies GmbH (Germany)
Stephan Jochum, AL Technologies GmbH (Germany)
Stefan Hansmann, AL Technologies GmbH (Germany)
Thierry Aellen, Univ. of Neuchâtel (Switzerland)
Marcella Giovannini, Univ. of Neuchâtel (Switzerland)
Jérôme Faist, Univ. of Neuchâtel (Switzerland)

Published in SPIE Proceedings Vol. 6133:
Novel In-Plane Semiconductor Lasers V
Carmen Mermelstein; David P. Bour, Editor(s)

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