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Proceedings Paper

A narrow-linewidth, frequency-stabilized OPO for sub-Doppler molecular spectroscopy around 3 um
Author(s): Iolanda Ricciardi; Eduardo De Tommasi; Pasquale Maddaloni; Simona Mosca; Alessandra Rocco; Jean-Jacques Zondy; Maurizio De Rosa; Paolo De Natale
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Paper Abstract

We present a widely-tunable, singly-resonant optical parametric oscillator, emitting more than 1 W in the region between 2.7 and 4.2 μm. Two configurations have been studied in order to improve the frequency stability and the linewidth of the OPO emission. First, we stabilized the signal frequency to a high-finesse Fabry-Perot cavity. Then, we locked both pump and signal frequency to the frequency comb generated by a NIR fs mode-locked fibre laser, linked to the caesium primary standard. With this last configuration we carried out saturation spectroscopy of several transitions belonging to the ν1 rovibrational band of CH3I, resolving their electronic quadrupole hyperfine structure, and determining the absolute frequency of the hyperfine components with a 50-kHz-uncertainty. An upper limit for the idler linewidth has been estimated as 200 kHz FWHM.

Paper Details

Date Published: 11 May 2012
PDF: 9 pages
Proc. SPIE 8434, Nonlinear Optics and Applications VI, 84341Z (11 May 2012); doi: 10.1117/12.960334
Show Author Affiliations
Iolanda Ricciardi, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Eduardo De Tommasi, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Pasquale Maddaloni, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Simona Mosca, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Alessandra Rocco, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Jean-Jacques Zondy, Lab. Commun de Métrologie LNE-CNAM (France)
Maurizio De Rosa, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Paolo De Natale, INO-CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)


Published in SPIE Proceedings Vol. 8434:
Nonlinear Optics and Applications VI
Benjamin J. Eggleton; Alexander L. Gaeta; Neil G. Broderick, Editor(s)

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