Scientific Results

A narrow-linewidth optical parametric oscillator for mid-infrared high-resolution spectroscopy

Year: 2012

Authors: Ricciardi I., De Tommasi E., Maddaloni P., Mosca S., Rocco A., Zondy J.-J., De Rosa M., De Natale P.

Autors Affiliation: INO–CNR, Istituto Nazionale di Ottica, Sezione di Napoli, and LENS, European Laboratory for Nonlinear Spectroscopy, Via Campi Flegrei 34, Pozzuoli (NA), I-80078, Italy; Laboratoire Commun de Metrologie LNE-CNAM, 61 rue du Landy, La Plaine Saint-Denis, 93210, France

Abstract: We present a narrow-linewidth, singly-resonant cw optical parametric oscillator, emitting more than 1 W in the 2.7-4.2 mu m range. The OPO is pumped by a narrow linewidth (40 kHz) fibre-laser system and the signal frequency is locked to a high-finesse Fabry-Perot cavity in order to increase the spectral resolution, thus obtaining a residual linewidth of 70 kHz for the signal. We tested the spectral performance of our OPO on several transitions in the nu(1) rovibrational band of CH3I, measuring line intensities and showing sub-Doppler dip detection.

Journal/Review: MOLECULAR PHYSICS

Volume: 110 (17)      Pages from: 2103  to: 2109

More Information: This work was partially supported by Regione Toscana through the project SIMPAS, in the framework of POR-CReO FESR 2007-2013.
KeyWords: Frequency stabilization; High resolution; High-resolution spectroscopy; Line intensities; Midinfrared; Narrow-line width; Rovibrational band; Signal frequencies; Spectral performance; Sub-Doppler spectroscopy, Linewidth; Molecular spectroscopy; Pumping (laser); Spectroscopic analysis, Optical parametric oscillators
DOI: 10.1080/00268976.2012.699640

Citations: 14
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