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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 11 — May. 26, 2008
  • pp: 8242–8249

Absolute frequency measurement of molecular transitions by a direct link to a comb generated around 3-µm

P. Malara, P. Maddaloni, G. Gagliardi, and P. De Natale  »View Author Affiliations

Optics Express, Vol. 16, Issue 11, pp. 8242-8249 (2008)

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A 3-µm continuous-wave difference-frequency source is directly referenced to a mid-infrared optical frequency comb synthesizer by measuring their beat-note signal by a fast HgCdTe detector. Absolute frequency metrology of molecular vibration spectra is demonstrated by locking the 3-µm coherent radiation to the nearest comb tooth and tuning the comb mode spacing across the Doppler-broadened absorption profile of a CH4 ro-vibrational transition.

© 2008 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(190.0190) Nonlinear optics : Nonlinear optics
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: December 13, 2007
Revised Manuscript: February 15, 2008
Manuscript Accepted: March 5, 2008
Published: May 22, 2008

P. Malara, P. Maddaloni, G. Gagliardi, and P. De Natale, "Absolute frequency measurement of molecular transitions by a direct link to a comb generated around 3-µm," Opt. Express 16, 8242-8249 (2008)

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