Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

Abstract We report for the first time the frequency locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locked laser source is exploited to carry out molecular spectroscopy around 7.8 μm with a line-centre frequency combined uncertainty of ~63 kHz. The...

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Autores principales:	Marco Lamperti, Bidoor AlSaif, Davide Gatti, Martin Fermann, Paolo Laporta, Aamir Farooq, Marco Marangoni
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/578de87337b640469cbc3826a845458e
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spelling	oai:doaj.org-article:578de87337b640469cbc3826a845458e2021-12-02T15:08:27ZAbsolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser10.1038/s41598-018-19188-22045-2322https://doaj.org/article/578de87337b640469cbc3826a845458e2018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19188-2https://doaj.org/toc/2045-2322Abstract We report for the first time the frequency locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locked laser source is exploited to carry out molecular spectroscopy around 7.8 μm with a line-centre frequency combined uncertainty of ~63 kHz. The strength of the approach, in view of an accurate retrieval of line centre frequencies over a spectral range as large as 100 cm−1, is demonstrated on the P(40), P(18) and R(31) lines of the fundamental rovibrational band of N2O covering the centre and edges of the P and R branches. The spectrometer has the potential to be straightforwardly extended to other spectral ranges, till 12 μm, which is the current wavelength limit for commercial cw EC-QCLs.Marco LampertiBidoor AlSaifDavide GattiMartin FermannPaolo LaportaAamir FarooqMarco MarangoniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marco Lamperti Bidoor AlSaif Davide Gatti Martin Fermann Paolo Laporta Aamir Farooq Marco Marangoni Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
description	Abstract We report for the first time the frequency locking of an extended-cavity quantum-cascade-laser (EC-QCL) to a near-infrared frequency comb. The locked laser source is exploited to carry out molecular spectroscopy around 7.8 μm with a line-centre frequency combined uncertainty of ~63 kHz. The strength of the approach, in view of an accurate retrieval of line centre frequencies over a spectral range as large as 100 cm−1, is demonstrated on the P(40), P(18) and R(31) lines of the fundamental rovibrational band of N2O covering the centre and edges of the P and R branches. The spectrometer has the potential to be straightforwardly extended to other spectral ranges, till 12 μm, which is the current wavelength limit for commercial cw EC-QCLs.
format	article
author	Marco Lamperti Bidoor AlSaif Davide Gatti Martin Fermann Paolo Laporta Aamir Farooq Marco Marangoni
author_facet	Marco Lamperti Bidoor AlSaif Davide Gatti Martin Fermann Paolo Laporta Aamir Farooq Marco Marangoni
author_sort	Marco Lamperti
title	Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_short	Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_full	Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_fullStr	Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_full_unstemmed	Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
title_sort	absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/578de87337b640469cbc3826a845458e
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Absolute spectroscopy near 7.8 μm with a comb-locked extended-cavity quantum-cascade-laser

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