Approaching the transit time limit for high-precision spectroscopy on metastable CO around 6 mu m
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 (PRINT)
Volume: 21 (44) Pages from: 24506 to: 24511
KeyWords: QUANTUM CASCADE LASER; NARROW-LINEWIDTH; METROLOGYDOI: 10.1039/c9cp02941aCitations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-07-05References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here