Mid-infrared frequency comb for broadband high precision and sensitivity molecular spectroscopy

Year: 2014

Authors: Galli I., Bartalini S., Cancio P., Cappelli F., Giusfredi G., Mazzotti D., Akikusa N., Yamanishi M., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica (INO)—CNR and European Laboratory for Non-linear Spectroscopy (LENS), Via Carrara 1, 50019 Sesto Fiorentino FI, Italy;
Development Bureau Laser Device R&D Group, Hamamatsu Photonics KK, Shizuoka 434-8601, Japan;
Central Research Laboratories, Hamamatsu Photonics KK, Shizuoka 434-8601, Japan

Abstract: We report on the experimental demonstration of the metrological and spectroscopic performances of a mid-infrared comb generated by a nonlinear downconversion process from a Ti:sapphire-based near-infrared comb. A quantum cascade laser at 4330 nm was phase-locked to a single tooth of this mid-infrared comb and its frequency-noise power spectral density was measured. The mid-infrared comb itself was also used as a multifrequency highly coherent source to perform ambient air direct comb spectroscopy with the Vernier technique, by demultiplexing it with a high-finesse Fabry-Perot cavity. (C) 2014 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 39 (17)      Pages from: 5050  to: 5053

More Information: We gratefully acknowledge funding from Laserlab-Europe, grant agreement no. 284464; EU 7th Framework Program; Programma Nazionale di Ricerche in Antartide (PNRA), 2013/AC4.01 research project; Italian Ministry of Foreign Affairs; \”Broadcon\” Italy-Israel bilateral project; ESFRI Roadmap; Extreme Light Infrastructure (ELI) project.
KeyWords: Laser mode locking; Molecular spectroscopy; Power spectral density; Quantum cascade lasers; Sapphire; Fabry-Perot interferometers; Laser mode locking; Molecular spectroscopy; Power spectral density; Quantum cascade lasers; Sapphire; Spectral density, Coherent sources; Downconversion; Experimental demonstrations; Fabry-Perot cavity; Mid-infrared frequency combs; Multi frequency; Near Infrared; Single tooth; Frequency noise; High-precision, Infrared devices; Infrared devices
DOI: 10.1364/OL.39.005050

Citations: 36
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