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Optics Letters

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  • Vol. 30, Iss. 9 — May. 1, 2005
  • pp: 997–999

Frequency-comb-based absolute frequency measurements in the mid-infrared with a difference-frequency spectrometer

D. Mazzotti, P. Cancio, G. Giusfredi, P. De Natale, and M. Prevedelli  »View Author Affiliations


Optics Letters, Vol. 30, Issue 9, pp. 997-999 (2005)
http://dx.doi.org/10.1364/OL.30.000997


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Abstract

We demonstrate the possibility of extending the well-established metrological performance of optical frequency-comb synthesizers to the mid-IR region by phase locking the pump and signal lasers of a difference-frequency source to two near-IR teeth of an optical comb. An uncertainty of 800 Hz (1.1×10^-11) in the absolute frequencies of CO2 transitions near 4.2 µm has been measured by cavity-enhanced saturated-absorption spectroscopy. Prospects for the creation of a new dense set of high-quality molecular frequency standards in the IR are discussed.

© 2005 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(190.2620) Nonlinear optics : Harmonic generation and mixing
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6460) Spectroscopy : Spectroscopy, saturation

Citation
D. Mazzotti, P. Cancio, G. Giusfredi, P. De Natale, and M. Prevedelli, "Frequency-comb-based absolute frequency measurements in the mid-infrared with a difference-frequency spectrometer," Opt. Lett. 30, 997-999 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-9-997


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