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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 1020–1029

Absolute spectroscopy of N2O near 4.5 μm with a comb-calibrated, frequency-swept quantum cascade laser spectrometer

Kevin Knabe, Paul A. Williams, Fabrizio R. Giorgetta, Michael B. Radunsky, Chris M. Armacost, Sam Crivello, and Nathan R. Newbury  »View Author Affiliations

Optics Express, Vol. 21, Issue 1, pp. 1020-1029 (2013)

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We present absolute line center frequencies for 24 fundamental ν3 ro-vibrational P-branch transitions near 4.5 μm in N2O with an absolute expanded (multiplied by 2) frequency uncertainty of 800 kHz. The spectra are acquired with a swept laser spectrometer consisting of an external-cavity quantum cascade laser whose instantaneous frequency is continuously tracked against a near-infrared frequency comb. The measured absorbance profiles have a well-calibrated frequency axis, and are fitted to determine absolute line center values. We discuss the main sources of uncertainty.

© 2013 OSA

OCIS Codes
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:

Original Manuscript: November 15, 2012
Revised Manuscript: December 20, 2012
Manuscript Accepted: December 20, 2012
Published: January 9, 2013

Kevin Knabe, Paul A. Williams, Fabrizio R. Giorgetta, Michael B. Radunsky, Chris M. Armacost, Sam Crivello, and Nathan R. Newbury, "Absolute spectroscopy of N2O near 4.5 μm with a comb-calibrated, frequency-swept quantum cascade laser spectrometer," Opt. Express 21, 1020-1029 (2013)

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