A comb-referenced difference-frequency spectrometer for cavity ring-down spectroscopy in the 4.5 mu m region

Year: 2006

Authors: Mazzotti D., Cancio P., Castrillo A., Galli I., Giusfredi G., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica Applicata (INOA) – CNR
European Laboratory for Non-linear Spectroscopy (LENS)
Dipartimento di Scienze Ambientali, Seconda Università di Napoli

Abstract: We present a unique spectrometer combining absolute-frequency and high-sensitivity capabilities for precise investigation of molecular ro-vibrational spectra in the mid-IR. A coherent source based on a difference-frequency generation non-linear process in a periodically poled LiNbO3 crystal is referenced to an optical frequency-comb synthesizer. The generated radiation is coupled to a high-finesse Fabry-Perot cavity and the transmitted cavity ring-down signal is sensitive to very small gas absorbance. We tested the performance of our set-up on CO2 transitions.

Journal/Review: JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS

Volume: 8 (7)      Pages from: S490  to: S493

KeyWords: Absorption; Carbon dioxide; Fabry-Perot interferometers; Lithium niobate; Molecular vibrations; Spectroscopic analysis, Cavity ring-down spectroscopy; Difference-frequency generation; Optical frequency-comb synthesizer, Spectrometers
DOI: 10.1088/1464-4258/8/7/S28

Citations: 11
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