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: Dipartimento di Fisica — Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; Istituto di Fotonica e Nanotecnologie — CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; Dipartimento di Matematica e Fisica — Università degli studi della Campania “Luigi Vanvitelli”, Viale Lincoln 5, 81100 Caserta, Italy; CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; Agenzia Spaziale Italiana — Centro di Geodesia Spaziale, Matera 75100, Italy; INFN, Istituto Nazionale di Fisica Nucleare, Sez. di Napoli, Complesso Universitario di M.S. Angelo, Via Cintia, 80126 Napoli, 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 dell´Istruzione, dell´Universita 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

Citations: 12
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