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

Year: 2005

Authors: Mazzotti D., Cancio P., Giusfredi G., De Natale P., Prevedelli M.

Autors Affiliation: Istituto Nazionale di Ottica Applicata (INOA) – CNR
European Laboratory for Non-linear Spectroscopy (LENS)
Dipartimento di Chimica Fisica e Inorganica, Università di Bologna

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 X 10(-11)) in the absolute frequencies of CO2 transitions near 4.2 mu m 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. (c) 2005 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 30 (9)      Pages from: 997  to: 999

KeyWords: Frequency measurements; Global Positioning Satellite (GPS); Optical frequencies; Optical frequency-comb, Absorption spectroscopy; Crystal structure; Frequencies; Global positioning system; Infrared radiation; Lasers; Phase locked loops; Piezoelectric transducers, Spectrometers
DOI: 10.1364/OL.30.000997

Citations: 55
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