Approaching the transit time limit for high-precision spectroscopy on metastable CO around 6 mu m

Year: 2019

Authors: D’Ambrosio D., Borri S., Verde M., Borgognoni A., Insero G., De Natale P., Santambrogio G.

Autors Affiliation: CNR, INO, Via Nello Carrara 1, I-50019 Sesta Fiorentino, Italy; European Lab Nonlinear Spect, LENS, Via Nello Carrara 1, I-50019 Sesta Fiorentino, Italy; Ist Nazl Ric Metrol, INRIM, Str Cacce 91, I-10135 Turin, Italy; Politecn Torino, DET, Corso Duca Abruzzi 24, I-10129 Turin, Italy; Ist Nazl Fis Nucl, Sez Firenze, Via G Sansone 1, I-50019 Sesta Fiorentino, FI, Italy; Univ Florence, Dept Chem, Via Lastruccia 3, I-50019 Sesta Fiorentino, Italy; European Commiss, JRC, Karlsruhe, Germany.

Abstract: As molecular spectroscopy makes its comeback to the limelight of fundamental sciences, scientists need ever better coherent light sources and diagnostic methods. Of particular importance for molecular spectroscopy is the mid infrared spectral region, where strong and narrow ro-vibrational excitations have their fundamental transition frequencies. Unfortunately, much technology in some portions of this spectral region is still rather pioneering. Here we present a high-resolution spectroscopy experiment, based on a molecular beam setup, which pushes the measured linewidth close to the transit time limit, on the order of 100 kHz. Moreover, we discuss the issue of frequency-noise characterization and the linewidth measurement of the ultrastable infrared laser used in the experiment.

Journal/Review: PHYSICAL CHEMISTRY CHEMICAL PHYSICS

Volume: 21 (44)      Pages from: 24506  to: 24511

KeyWords: QUANTUM CASCADE LASER; NARROW-LINEWIDTH; METROLOGY
DOI: 10.1039/c9cp02941a

ImpactFactor: 3.430
Citations: 1
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-10
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