Absolute frequency measurements of CHF3 Doppler-free ro-vibrational transitions at 8.6 mu m

Year: 2017

Authors: Gambetta A., Vicentini E., Wang Y., Coluccelli N., Fasci E., Gianfrani L., Castrillo A., Di Sarno V., Santamaria L., Maddaloni P., De Natale P., Laporta P., Galzerano G.

Autors Affiliation: Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Ist Foton & Nanotecnol CNR, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Univ Campania Luigi Vanvitelli, Dipartimento Matemat & Fis, Viale Lincoln 5, I-81100 Caserta, Italy; Ist Nazl Ottica, CNR INO, Via Campi Flegrei 34, I-80078 Pozzuoli, NA, Italy; Agenzia Spaziale Italiana, Ctr Geodesia Spaziale, I-75100 Matera, Italy; Ist Nazl Fis Nucl, Sez Napoli, Complesso Univ MS Angelo,Via Cintia, I-80126 Naples, Italy.

Abstract: We report on absolute measurements of saturated-absorption line-center frequencies of room-temperature trifluoromethane using a quantum cascade laser at 8.6 mu m and the frequency modulation spectroscopy method. Absolute calibration of the laser frequency is obtained by direct comparison with a mid-infrared optical frequency comb synthesizer referenced to a radio-frequency Rb standard. Several sub-Doppler transitions falling in the upsilon(5) vibrational band are investigated at around 1158.9 cm(-1) with a fractional frequency precision of 8.6.10(-1)2 at 1-s integration time, limited by the Rb-clock stability. The demonstrated frequency uncertainty of 6.6.10-(11) is mainly limited by the reproducibility of the frequency measurements.

Journal/Review: OPTICS LETTERS

Volume: 42 (10)      Pages from: 1911  to: 1914

More Information: Ministero dellŽIstruzione, dellŽUniversita e della Ricerca (MIUR) (RBFR1006TZ).
KeyWords: Molecular spectroscopy; Quantum cascade lasers; Rubidium; Spectroscopic analysis, Absolute frequency measurements; Absolute measurements; Fractional frequencies; Frequency measurements; Frequency modulation spectroscopy; Optical frequency combs; Saturated absorptions; Vibrational transitions, Uncertainty analysis; Semiconductor lasers, quantum cascade; Laser stabilization; Ultrafast lasers
DOI: 10.1364/OL.42.001911

ImpactFactor: 3.589
Citations: 12
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