Mid-infrared feed-forward dual-comb spectroscopy

Chen, Zaijun; Haensch, Theodor W. und Picque, Nathalie (2019): Mid-infrared feed-forward dual-comb spectroscopy. In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, No. 9: pp. 3454-3459

Abstract

Mid-infrared high-resolution spectroscopy has proven an invaluable tool for the study of the structure and dynamics of molecules in the gas phase. The advent of frequency combs advances the frontiers of precise molecular spectroscopy. Here we demonstrate, in the important 3-mu m spectral region of the fundamental CH stretch in molecules, dual-comb spectroscopy with experimental coherence times between the combs that exceed half an hour. Mid-infrared Fourier transform spectroscopy using two frequency combs with self-calibration of the frequency scale, negligible contribution of the instrumental line shape to the spectral profiles, high signal-to-noise ratio, and broad spectral bandwidth opens up opportunities for precision spectroscopy of small molecules. Highly multiplexed metrology of line shapes may be envisioned.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 0027-8424
• Language: English