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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 16 — Jun. 1, 2008
  • pp: 2993–2997

Fully reflective external-cavity setup for quantum-cascade lasers as a local oscillator in mid-infrared wavelength heterodyne spectroscopy

Dušan Stupar, Jürgen Krieg, Peter Krötz, Guido Sonnabend, Manuela Sornig, Thomas F. Giesen, and Rudolf Schieder  »View Author Affiliations


Applied Optics, Vol. 47, Issue 16, pp. 2993-2997 (2008)
http://dx.doi.org/10.1364/AO.47.002993


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Abstract

To our knowledge we present the first experiments with a fully reflective external-cavity quantum- cascade laser system at mid-infrared wavelengths for use as a local oscillator in a heterodyne receiver. The performance of the presented setup was investigated using absorption spectroscopy as well as heterodyne techniques. Tunability over 30 cm 1 at 1130 cm 1 was demonstrated using a grating spectrometer. A continuous tuning range of 0.28 cm 1 was verified by observing the spectra of an internally coupled confocal Fabry–Pérot interferometer and the absorption lines of gas phase SO 2 . In a second step the output from the system was used as a local oscillator signal for a heterodyne setup. We show that spectral stability and side mode suppression are excellent and that a compact external-cavity quantum-cascade laser system is well suited to be used as a local oscillator in infrared heterodyne spectrometers.

© 2008 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3570) Lasers and laser optics : Lasers, single-mode
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.6310) Spectroscopy : Spectroscopy, heterodyne

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 14, 2007
Revised Manuscript: April 28, 2008
Manuscript Accepted: April 29, 2008
Published: May 22, 2008

Citation
Dušan Stupar, Jürgen Krieg, Peter Krötz, Guido Sonnabend, Manuela Sornig, Thomas F. Giesen, and Rudolf Schieder, "Fully reflective external-cavity setup for quantum-cascade lasers as a local oscillator in mid-infrared wavelength heterodyne spectroscopy," Appl. Opt. 47, 2993-2997 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-16-2993

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