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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 21 — Nov. 1, 2012
  • pp: 4422–4424

Broadly tunable mid-infrared noise-immune cavity-enhanced optical heterodyne molecular spectrometer

Michael W. Porambo, Brian M. Siller, Jessica M. Pearson, and Benjamin J. McCall  »View Author Affiliations


Optics Letters, Vol. 37, Issue 21, pp. 4422-4424 (2012)
http://dx.doi.org/10.1364/OL.37.004422


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Abstract

The sensitive spectroscopic technique noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) has been successfully used in a variety of systems; however, no broadly tunable setup has been developed for the mid-infrared. To this end, we have integrated a difference frequency generation system into a NICE-OHMS setup. Initial optimization and characterization was completed with ro-vibrational spectroscopy of methane. Doppler-broadened frequency-modulated NICE-OHMS spectra were recorded at a sensitivity of 2×107cm1Hz1/2. Sub-Doppler saturation signals (Lamb dips) were also observed using wavelength-modulated NICE-OHMS, achieving a sensitivity of 6×109cm1Hz1/2.

© 2012 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6380) Spectroscopy : Spectroscopy, modulation
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6460) Spectroscopy : Spectroscopy, saturation

ToC Category:
Spectroscopy

History
Original Manuscript: August 10, 2012
Revised Manuscript: September 20, 2012
Manuscript Accepted: September 20, 2012
Published: October 22, 2012

Citation
Michael W. Porambo, Brian M. Siller, Jessica M. Pearson, and Benjamin J. McCall, "Broadly tunable mid-infrared noise-immune cavity-enhanced optical heterodyne molecular spectrometer," Opt. Lett. 37, 4422-4424 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-21-4422

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