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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 19 — Oct. 1, 2007
  • pp: 2792–2794

Room-temperature continuous-wave operation of an external-cavity quantum cascade laser

Arun Mohan, Andreas Wittmann, Andreas Hugi, Stéphane Blaser, Marcella Giovannini, and Jérôme Faist  »View Author Affiliations


Optics Letters, Vol. 32, Issue 19, pp. 2792-2794 (2007)
http://dx.doi.org/10.1364/OL.32.002792


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Abstract

Room-temperature, continuous-wave operation of an external-cavity quantum cascade laser (EC-QCL) is reported. Single-mode tuning range of 120 cm 1 was achieved, from 7.96 to 8.84 μ m . The gain chips utilized are based on the bound to continuum design and were fabricated as buried heterostructure lasers. Gap-free tuning (mode hops only on the external-cavity modes) is demonstrated for an antireflection-coated laser, just by grating rotation. The EC-QCL was implemented in a Littrow setup and an average power of 1.5 mW was obtained at 20 ° C , while a peak power of 20 mW was obtained for a modified Littrow setup with the back extraction of light.

© 2007 Optical Society of America

OCIS Codes
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.3600) Lasers and laser optics : Lasers, tunable

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 13, 2007
Revised Manuscript: August 20, 2007
Manuscript Accepted: August 20, 2007
Published: September 20, 2007

Citation
Arun Mohan, Andreas Wittmann, Andreas Hugi, Stéphane Blaser, Marcella Giovannini, and Jérôme Faist, "Room-temperature continuous-wave operation of an external-cavity quantum cascade laser," Opt. Lett. 32, 2792-2794 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-19-2792

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