Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy

Abstract High-resolution spectroscopy in the 1–10 μm region has never been fully tackled for the lack of widely-tunable and practical light sources. Indeed, all solutions proposed thus far suffer from at least one of three issues: they are feasible only in a narrow spectral range; the power availabl...

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Autores principales:	G. Insero, S. Borri, D. Calonico, P. Cancio Pastor, C. Clivati, D. D’Ambrosio, P. De Natale, M. Inguscio, F. Levi, G. Santambrogio
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/78f46995b7384b7db799d88419d4af6b
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spelling	oai:doaj.org-article:78f46995b7384b7db799d88419d4af6b2021-12-02T15:06:25ZMeasuring molecular frequencies in the 1–10 μm range at 11-digits accuracy10.1038/s41598-017-12891-62045-2322https://doaj.org/article/78f46995b7384b7db799d88419d4af6b2017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-12891-6https://doaj.org/toc/2045-2322Abstract High-resolution spectroscopy in the 1–10 μm region has never been fully tackled for the lack of widely-tunable and practical light sources. Indeed, all solutions proposed thus far suffer from at least one of three issues: they are feasible only in a narrow spectral range; the power available for spectroscopy is limited; the frequency accuracy is poor. Here, we present a setup for high-resolution spectroscopy, whose approach can be applied in the whole 1–10 μm range. It combines the power of quantum cascade lasers (QCLs) and the accuracy achievable by difference frequency generation using an orientation patterned GaP crystal. The frequency is measured against a primary frequency standard using the Italian metrological fibre link network. We demonstrate the performance of the setup by measuring a vibrational transition in a highly-excited metastable state of CO around 6 μm with 11 digits of precision.G. InseroS. BorriD. CalonicoP. Cancio PastorC. ClivatiD. D’AmbrosioP. De NataleM. InguscioF. LeviG. SantambrogioNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. Insero S. Borri D. Calonico P. Cancio Pastor C. Clivati D. D’Ambrosio P. De Natale M. Inguscio F. Levi G. Santambrogio Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
description	Abstract High-resolution spectroscopy in the 1–10 μm region has never been fully tackled for the lack of widely-tunable and practical light sources. Indeed, all solutions proposed thus far suffer from at least one of three issues: they are feasible only in a narrow spectral range; the power available for spectroscopy is limited; the frequency accuracy is poor. Here, we present a setup for high-resolution spectroscopy, whose approach can be applied in the whole 1–10 μm range. It combines the power of quantum cascade lasers (QCLs) and the accuracy achievable by difference frequency generation using an orientation patterned GaP crystal. The frequency is measured against a primary frequency standard using the Italian metrological fibre link network. We demonstrate the performance of the setup by measuring a vibrational transition in a highly-excited metastable state of CO around 6 μm with 11 digits of precision.
format	article
author	G. Insero S. Borri D. Calonico P. Cancio Pastor C. Clivati D. D’Ambrosio P. De Natale M. Inguscio F. Levi G. Santambrogio
author_facet	G. Insero S. Borri D. Calonico P. Cancio Pastor C. Clivati D. D’Ambrosio P. De Natale M. Inguscio F. Levi G. Santambrogio
author_sort	G. Insero
title	Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
title_short	Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
title_full	Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
title_fullStr	Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
title_full_unstemmed	Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
title_sort	measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/78f46995b7384b7db799d88419d4af6b
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Measuring molecular frequencies in the 1–10 μm range at 11-digits accuracy

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